View EV-ADF4360-2EB1Z_6952336.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

integrated synthesiz er and vco data sheet adf4360 - 2 rev. c document feedback information furnished by analog devices is believed to be accurate and reliable. however, no responsibility is assumed by analog devices for its use, nor for any infringements of patents or other righ ts of third parties that may result from its use. specifications subject to change without notice. no license is granted by implication or otherwise under any patent or patent rights of analog devices. trademarks and registered trademarks are the property of their respective owners. one technology way, p.o. box 9106, norwood, ma 02062 - 9106, u.s.a. tel: 781.329.4700 ? 2004C 2012 analog devices, inc. all rights reserved. technical support www.analog.com features output frequency range: 1850 mhz to 2170 mhz divide - by - 2 output 3.0 v to 3.6 v power supply 1.8 v logic compatibility integer - n synthesizer programmable dual - modulus prescaler 8/9, 16/17, 32/33 programmable output power level 3- wire serial interfa ce analog and digital lock detect hardware and software power - down mode applications wireless handsets (dect, gsm, pcs, dcs, wcdma) test equipment wireless lans catv equipment general description the adf4360 - 2 is a fully integrated integer - n synthesizer and voltage - controlled oscillator (vco). the adf4360 - 2 is designed for a center frequency of 2000 mhz. in addition, a divide - by - 2 option is available, whereby the user gets an rf output of b e tween 925 mhz and 1085 mhz. control of all the on - chip registers is through a simple 3 - wire inte r face. the device operates with a power supply ranging from 3.0 v to 3.6 v and can be powered down when not in use. functional block dia gram muxout cp v vco ref in clk data le av dd dv dd ce agnd dgnd cpgnd r set v tune c c c n rf out a rf out b vco core phase comparator mute divsel = 2 divsel = 1 n = (bp + a) load load charge pump output stage multiplexer integer register 13-bit b counter 14-bit r counter 24-bit function latch 24-bit data register 5-bit a counter prescaler p/p+1 multiplexer lock detect 2 adf4360-2 04436-001 figure 1.
adf4360 -2 data sheet rev. c | page 2 of 24 table of contents features .............................................................................................. 1 applications ....................................................................................... 1 general description ......................................................................... 1 functional block diagram .............................................................. 1 revision history ............................................................................... 2 specifications ..................................................................................... 3 timing characteristics ..................................................................... 5 absolute maximum ratings ............................................................ 6 transistor count ........................................................................... 6 esd caution .................................................................................. 6 pin configuration and function descriptions ............................. 7 typical performance characteristics ............................................. 8 circuit description ........................................................................... 9 reference input section ............................................................... 9 prescaler (p/p + 1) ........................................................................ 9 a and b counters ......................................................................... 9 r counter ...................................................................................... 9 pfd and charge pump ................................................................ 9 muxout and lock detect ...................................................... 10 input shift register .................................................................... 10 vco ............................................................................................. 10 output stage ................................................................................ 11 latch structure ........................................................................... 12 power - up ..................................................................................... 16 control latch .............................................................................. 18 n counter latch ......................................................................... 19 r counter latch ......................................................................... 19 applications ..................................................................................... 20 direct conversion modulator .................................................. 20 fixed frequency lo ................................................................... 21 interfacing ................................................................................... 21 pcb design guidelines for chip scale package ........................... 22 output matching ........................................................................ 22 outline dimensions ....................................................................... 23 ordering guide .......................................................................... 23 revision history 11 /12 rev. b to rev. c changes to table 1 ............................................................................ 4 changes to tab le 3 ............................................................................ 6 changes to figure 3 and table 4 ..................................................... 7 change to output matching section ........................................... 22 updated outline dimensions ....................................................... 23 changes to ordering g u ide .......................................................... 23 4/06 rev. a to rev. b updated format .................................................................. universal changes to features and general description ............................. 1 changes to table 1 ............................................................................ 3 chang es to vco section ............................................................... 11 changes to control latch section ................................................ 18 changes to direct conversion modulator section .................... 20 changes to ordering guide .......................................................... 23 12/04 rev. 0 to rev. a updated format .................................................................. universal changes to specifications ................................................................. 3 changes to timing characteristics ................................................. 5 change s to power - up section ...................................................... 16 added table 10 ............................................................................... 16 added figure 16 ............................................................................. 16 changes to ordering guide .......................................................... 23 updated outline dimensions ....................................................... 23 1/04 revision 0: initial version
data sheet adf4360 -2 rev. c | page 3 of 24 specifications 1 av dd = dv dd = v vco = 3.3 v 10%; agnd = dgnd = 0 v; t a = t min to t max , unless other wise noted . table 1. parameter b version unit conditions/comments ref in characteristics ref in input frequency 10/250 mhz min/max for f < 10 mhz, use a cmos - compatible square wave, slew rate > 21 v/ s ref in input sensitivi ty 0.7/ av dd v p - p min/max ac - coupled 0 to av dd v max cmos - compatible ref in input capacitance 5.0 pf max ref in input current 100 a max phase detector phase detector frequency 2 8 mhz max charge pump i cp sink/source 3 with r se t = 4.7 k ? high value 2.5 ma typ low value 0.312 ma typ r set range 2.7/10 k? i cp three - state leakage current 0.2 na typ sink and source current matching 2 % typ 1.25 v v cp 2.5 v i cp vs. v cp 1.5 % typ 1.25 v v cp 2.5 v i cp vs. temperature 2 % typ v cp = 2.0 v logic inputs v inh , input high voltage 1.5 v min v inl , input low voltage 0.6 v max i inh /i inl , input current 1 a max c in , input capacitance 3.0 pf max logic outputs v oh , output high voltage dv dd ? 0.4 v min c mos output chosen i oh , output high current 500 a max v ol , output low voltage 0.4 v max i ol = 500 a power supplies av dd 3.0/3.6 v min/v max dv dd av dd v vco av dd ai dd 4 10 ma typ di dd 4 2.5 ma typ i vco 4 , 5 24.0 ma typ i core = 15 ma i vco 4 , 5 29.0 ma typ i core = 20 ma i rfout 4 3.5 to 11.0 ma typ rf output stage is progra mmable low power sleep mode 4 7 a typ
adf4360 -2 data sheet rev. c | page 4 of 24 parameter b version unit conditions/comments rf output characteristics 5 vco output frequency 1850/2170 mhz min/max i core = 20 ma, rf < 2 ghz i core = 15 ma, rf > 2 ghz v co sensitivity 57 mhz/v typ lock time 6 400 s typ to within 10 hz of final frequency frequency pushing (open loop) 6 mhz/v typ frequency pulling (open loop) 15 khz typ into 2.00 vswr load harmonic content (second) ?19 dbc typ harmonic content (third) ?37 dbc typ output power 5 , 7 ?13/?6 dbm typ programmable in 3 db steps (s ee table 7 ) output power variation 3 db typ for tuned loads, see the output matching section vco tuning range 1.25/2.7 v min/max noise characteristics 5 vco phase - noise performance 8 ? 110 dbc/hz typ @ 100 khz offset from carrier ?133 dbc/hz typ @ 1 mhz offset from carrier ?141 dbc/hz typ @ 3 mhz offset from carrier ?147 dbc/hz typ @ 10 mhz offset from carrier synthesizer phase - noise floor 9 ?172 dbc/hz typ @ 25 khz pfd frequency ? 163 dbc/hz typ @ 200 khz pfd frequency ?147 dbc/hz typ @ 8 mhz pfd frequency in - band phase noise 10, 11 ?83 dbc/hz typ @ 1 khz offset from carrier rms integrated phase error 12 0.64 degrees typ 100 hz to 100 khz spurious signals due to pfd fr e quency 11, 13 ?70 dbc t yp level of unlocked signal with mtld e n abled ?42 dbm typ 1 operating temperature range is ?40 c to +85 c. 2 guaranteed by design. sample tested to ensure compliance. 3 i cp is internally modified to maintain constant loop gain over the frequency range. 4 t a = 25c; av dd = dv dd = v vco = 3.3 v; p = 32. 5 for rf > 2 ghz, these characteristics are guar anteed only for vco core power = 15 ma. for frequencies < 2 ghz, these characteristics are guaranteed only for vco core power = 20 ma. 6 jumping from 2.0 ghz to 2.17 ghz. pfd frequency = 200 khz; loop bandwidth = 10 khz. 7 using 50 ? resistors to v vco into a 50 ? load. for tuned loads, see the output matching section. 8 the noise of the vco is measured in open - loop conditions. 9 the synthesizer phase - noise floor is estimated by measuring the in - band phase noise at the output of the vco and subtracting 20 log n (where n i s the n divider value). 10 the phase noise is measured with the ev - adf4360 -2 eb1 z evaluation board and the hp8562e spectrum analyzer. the spectrum analyzer provides the ref in for the synthesizer; offset frequency = 1 k hz. 11 f refin = 10 mhz; f pfd = 200 khz; n = 10000; loop b/w = 10 khz. 12 f refin = 10 mhz; f pfd = 1 mhz; n = 2000; loop b/w = 25 khz. 13 the spurious signals are measured with the ev - adf4360 -2 eb1 z evaluation board and the hp8562e spectrum analyzer. the spectru m analyzer pr o vides the ref in for the synthesizer; f refout = 10 mhz @ 0 dbm.
data sheet adf4360 -2 rev. c | page 5 of 24 timing characteristi cs 1 av dd = dv dd = v vco = 3.3 v 10%; agnd = dgnd = 0 v; 1.8 v and 3 v logic levels used; t a = t min to t max , unless otherwise noted. table 2. param eter limit at t min to t max (b version) unit test conditions/comments t 1 20 ns min le setup time t 2 10 ns min data to clock setup time t 3 10 ns min data to clock hold time t 4 25 ns min clock high duration t 5 25 ns min clock low duration t 6 10 ns min clock to le setup time t 7 20 ns min le pulse width 1 see the power - up section for the recommended power - up procedure for this device. clock data le le db23 (msb) db22 db2 db1 (control bit c2) db0 (lsb) (control bit c1) t 1 t 2 t 3 t 7 t 6 t 4 t 5 04436-002 figure 2 . timing diagram
adf4360 -2 data sheet rev. c | page 6 of 24 absolute maximum rat ings t a = 25c, unless otherwise noted. table 3. parameter rating av dd to gnd 1 ? 0.3 v to +3.9 v av dd to dv dd ? 0.3 v to +0.3 v v vco to gnd ? 0.3 v to +3.9 v v vco to av dd ? 0.3 v to +0.3 v digital i/o voltage to gnd ? 0.3 v to v dd + 0.3 v analog i/o voltage to gnd ? 0.3 v to v dd + 0.3 v ref in to gnd ? 0.3 v to v dd + 0.3 v operating temperature maximum junction temperature 150c csp ja thermal impedance paddle soldered 50 c/w paddle not soldered 88 c/w lead temperature, soldering reflow 260 c 1 gnd = agnd = dgnd = 0 v. stresses above those listed under absolute maximum ratings may cau se permanent damage to the device. this is a stress ra t ing only; functional operation of the device at these or any other conditions above those included in the operational sections of this specification is not implied. exposure to absolute max i mum rating conditions for extended periods may affect device rel i ability. this device is a high performance rf integrated circuit with an esd rating of <1 kv; it is esd sensitive. proper precautions should be taken for handling and assembly. transistor count 12,543 (cmos) and 700 (bipolar). esd caution esd (electrostatic discharge) sensitive device. electrostatic charges as high as 4000 v readily accum u late on the human body and test equipment and can discharge without detection. although this product features propri e tary esd protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. therefore, proper esd precautions are recommended to avoid performance degradation or loss of functionality.
data sheet adf4360 -2 rev. c | page 7 of 24 pin configuration and function descrip tions 04436-003 adf4360-2 top view (not to scale) cpgnd 1 av dd 2 agnd 3 rf out a 4 rf out b 5 v vco 6 data 18 clk 17 ref in 16 dgnd 15 c n 14 r set 13 v tune 7 agnd 8 agnd 9 agnd 10 agnd 11 c c 12 cp 24 ce 23 agnd 22 dv dd 21 muxout 20 le 19 pin 1 identifier notes 1. the exposed pad must be connected to agnd. figure 3 . pin configuration table 4 . pin function descriptions pin no. mnemonic descriptions 1 cpgnd charge pump ground. this is the ground return path for the charge pump. 2 av dd analog power supply. this ranges from 3.0 v to 3.6 v. decoupling capacitors to the analog ground plane should be placed as close as possible to this pin. av dd must have the same value as dv dd . 3, 8 to 11, 22 agnd analog ground. this is the ground return path of the prescaler and vco. 4 rf out a vco output. the output level is programmable from ? 6 dbm to ? 13 dbm. see the output matching section for a description of the various output stages. 5 rf out b vc o complementary output. the output level is programmable from ? 6 dbm to ? 13 dbm. see the output matching section for a description of the various output stages. 6 v vco power supply for the vco. this ranges from 3.0 v to 3.6 v. decoupling capacitors to the analog ground plane should be placed as close as possible to this pin. v vco must have the same value as av dd . 7 v tune control input to the vco. this voltage determines the output frequency and is derived fro m filtering the cp output voltage. 12 c c internal compensation node. this pin must be decoupled to ground with a 10 nf capacitor. 13 r set connecting a resistor between this pin and cp gnd sets the maximum charge pump output current for the synthesiz er. the nominal voltage potential at the r set pin is 0.6 v. the relationship between i cp and r set is set cpmax r 7511 i . = where r set = 4.7 k ?, i cpmax = 2.5 ma. 14 c n internal compensation node. this pin must be decoupled to v vco with a 10 f capacitor. 15 dgnd digital ground. 16 ref in reference input. this is a cmos input with a nominal threshold of v dd /2 and a dc equivalent input resi s tance of 100 k ?. see figure 10 . this input can be driven from a ttl or cmos crystal oscillator, or it can be ac - coupled. 17 clk serial clock input. this serial clock is used to clock in the serial data to the registers. the data is latched into the 24 - bit shift register on the clk rising edge. this input is a high impedan ce cmos input. 18 data serial data input. the serial data is loaded msb first with the two lsbs being the control bits. this input is a high impedance cmos input. 19 le load enable, cmos input. when le goes high, the data stored in the shift registers is loaded into one of the four latches, and the relevant latch is selected using the control bits. 20 muxout this multiplexer output allows either the lock detect, the scaled rf, or the scaled reference frequency to be accessed externally. 21 dv dd digital power supply. this ranges from 3.0 v to 3.6 v. decoupling capacitors to the digital ground plane should be placed as close as possible to this pin. dv dd must have the same value as av dd . 23 ce chip enable. a logic low on this pin powers down the device and puts the charge pump into three - state mode. taking the pin high powers up the device depending on the status of the power - down bits. 24 cp charge pump output. when enabled, this provides i cp to the external loop filter, which in turn drives the internal vco. ep exposed pad. the exposed pad must be connected to agnd.
adf4360 -2 data sheet rev. c | page 8 of 24 typical performance characteristics 04436-004 ?150 ?160 ?170 ?140 ?130 ?120 ?110 ?100 ?90 ?80 ?70 ?40 ?50 ?60 ?30 ?20 ?10 0 1k 10m 1m 100k 10k frequency offset (hz) 4 3 2 1 output power (db) figure 4 . open - loop vco phase noise 04436-005 100 10m 1m 100k 10k 1k frequency offset (hz) output power (db) ?145 ?150 ?140 ?135 ?130 ?125 ?120 ?115 ?110 ?105 ?90 ?95 ?100 ?85 ?80 ? 75 ?70 figure 5 . vco phase noise, 2000 mhz, 200 khz pfd, 10 khz loop bandwidth 04436-006 100 10m 1m 100k 10k 1k frequency offset (hz) output power (db) ?145 ?150 ?140 ?135 ?130 ?125 ?120 ?115 ?110 ?105 ?90 ?95 ?100 ?85 ?80 ?75 ?70 figure 6 . vco phase noise, 1000 mhz, divide - by - 2 enabled 200 khz pfd, 10 khz loop bandwidth 04436-007 output power (db) ?90 ?80 ?70 ?60 ?50 ?40 ?30 ?20 ?10 0 ?2khz ?1khz 2000mhz 1khz 2khz ?84.0dbc/hz v dd = 3v, v vco = 3v i cp = 2.5ma pfd frequency = 200khz loop bandwidth = 10khz res. bandwidth = 30hz video bandwidth = 30hz sweep = 1.9seconds averages = 10 figure 7 . close - in phase noise at 2000 mhz (200 khz channel spacing ) 04436-008 output power (db) ?90 ?80 ?70 ?60 ?50 ?40 ?30 ?20 ?10 0 ?200khz ?100khz 2000mhz 100khz 200khz ?79.5dbc v dd = 3v, v vco = 3v i cp = 2.5ma pfd frequency = 200khz loop bandwidth = 10khz res. bandwidth = 3khz video bandwidth = 3khz sweep = 140ms averages = 100 figure 8 . reference spurs at 2000 mhz (200 khz channel spacing, 10 khz loop bandwidth) 04436-009 output power (db) ?90 ?80 ?70 ?60 ?50 ?40 ?30 ?20 ?10 0 ?1mhz ?0.5mhz 2000mhz 0.5mhz 1mhz ?83.8dbc/hz v dd = 3v, v vco = 3v i cp = 2.5ma pfd frequency = 1mhz loop bandwidth = 25khz res. bandwidth = 30khz video bandwidth = 30khz sweep = 50ms averages = 100 figure 9 . reference spurs at 2000 mhz (1 mhz channel spacing, 25 khz loop bandwidth)
data sheet adf4360 -2 rev. c | page 9 of 24 circuit description reference input sect ion the reference input stage is shown in figure 10 . sw1 and sw2 are normally closed switches. sw3 is normally open. when power - down is initiated, sw3 is closed, and sw1 and sw2 are opened. thi s ensures that there is no loading of the ref in pin on power - down. 04436-010 buffer t o r counter ref in 100k ? nc sw2 sw3 no nc sw1 power-down contro l figure 10 . reference input stage prescaler (p/p + 1) the dual - modulus prescaler (p/p + 1), along with the a and b counters, enables the large division ratio, n , t o be realized (n = bp + a ). the dual - modulus prescaler, operating at cml levels, takes the clock from the vco and divides it down to a manageable frequency for the cmos a and b counters. the presc a ler is programmable. it can be set in software to 8/9, 16/ 17, or 32/33 and is based on a synchronous 4/5 core. there is a minimum divide ratio possible for fully contiguous output freque n cies; this minimum is determined by p, the prescaler value, and is given by ( p 2 ? p ). a and b counters the a and b cmos counters combine with the dual - modulus prescaler to allow a wide range division ratio in the pll fee d back counter. the counters are specified to work when the pr e scaler output is 300 mhz or less. thus, with a vco fre quency of 2.5 ghz, a prescaler value of 16/17 is valid, but a value of 8/9 is not valid. pulse swallow function the a and b counters, in conjunction with the dual - modulus prescaler, make it possible to generate output frequencies that are spaced only by t he reference frequency divided by r. the vco frequency equation is f vco = [( p b ) + a ] f refin / r where: f vco is the output frequency of the vco. p is the preset modulus of the dual - modulus presc a ler (8/9, 16/17, and so on). b is the preset divide ratio of the b i nary 13 - bit counter (3 to 8 , 191). a is the preset divide ratio of the binary 5 - bit swallow counter (0 to 31). f refin is the external reference frequency osci l lator. n = bp + a to pfd from vco n divider modulus control load load 13-bit b counter 5-bit a counter prescaler p/p+1 04436-011 figure 11 . a and b counters r counter the 14 - bit r counter allows the input reference frequency to be divided down to produce the reference clock to the phase fr e quency detector (pfd). division ratios from 1 to 16,383 are allowed. pfd and charge pump the pfd takes inputs from the r counter and n counter (n = bp + a) and produces an output proportional to the phase and frequency difference between them. figure 12 is a simpl i fied schematic. the pfd includes a programmable delay el e ment that controls the width of the antibacklash pulse. this pulse ensures that there is no dead zone in the pfd transfer function and minimizes phase noise and reference spurs. two bits in the r counter latch, abp2 and abp1, control the width of the pulse (see table 9 ). 04436-012 programmable delay u3 clr2 q2 d2 u2 clr1 q1 d1 charge pump down up hi hi u1 abp1 abp2 r divider n divider cp output r divider n divider cp cpgnd v p figure 12 . pfd simplified schematic and timing (in lock)
adf4360 -2 data sheet rev. c | page 10 of 24 muxout and lock dete ct the output multiplexer on the adf4360 family allows the user to access various internal points on the chip. the state of muxout is controlled by m3, m2, and m1 in the function latch. the full truth table is shown in table 7 . figure 13 shows the muxout section in block diagram form. lock detect muxout can be programmed for two types of lock detect: digital and analog. digital lock detect is active high. when ldp in the r counter latch is set to 0, digital lock detect is set high when the phase error on three consecutive phase detector c ycles is less than 15 ns. with ldp set to 1, five consecutive cycles of less than 15 ns phase error are required to set the lock detect. it stays set high until a phase error of greater than 25 ns is detected on any sub sequent pd cycle. the n - channel , open - drain , analog lo ck detect should be operated with an external pull - up resi s tor of 10 k? nominal. when a lock is detected, the output is high with narrow low - going pulses. r counter output n counter output digital lock detect dgnd control mux muxout dv dd analog lock detect sdout 04436-013 figure 13 . muxout circuit input shift register the adf4360 familys digita l section includes a 24 - bit input shift register, a 14 - bit r counter, and an 18 - bit n counter co m prised of a 5 - bit a counter and a 13 - bit b counter. data is clocked into the 24 - bit shift register on each rising edge of clk. the data is clocked in msb firs t. data is transferred from the shift register to one of four latches on the rising edge of le. the destination latch is determined by the state of the two co n trol bits (c2, c1) in the shift register. the two lsbs are db1 and db0, as shown in figure 2 . the truth table for these bits is shown in table 5 . table 6 shows a summary of how the latches are programmed. note that the test mode l atch is used for fa c tory testing and should not be programmed by the user. table 5 . c2 and c1 truth table control bits c2 c1 data latch 0 0 control latch 0 1 r counter 1 0 n counter (a and b) 1 1 test mode latc h vco the vco core in the adf4360 family uses eight overlapping bands, as shown in figure 14 , to allow a wide frequency range to be covered without a large vco sensitivity (k v ) and resu l tant poor phase noise and spurious performance. the correct band is chosen automatically by the band select logic at power - up or whenever the n counter latch is updated. it is important that the correct write sequence be followed at power - up. this sequence is 1. r counter latch 2. cont rol latch 3. n counter latch during band select, which takes five pfd cycles, the vco v tune is disconnected from the output of the loop filter and is co n nected to an internal reference voltage. 04436-014 1600 2300 2000 2100 2200 1900 1800 1700 frequency (mhz) voltage (v) 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 figure 14 . frequency vs. v tune , adf436 0-2 the r counter output is used as the clock for the band select logic and should not exceed 1 mhz. a programmable divider is pro vided at the r counter input to allow division by 1, 2, 4, or 8 and is co n trolled by bit bsc1 and bit bsc2 in the r counter la tch. where the required pfd frequency exceeds 1 mhz, the divide ratio should be set to allow enough time for correct band sele c tion . after band selection, normal pll action resumes. the nominal value of k v is 57 m h z / v, o r 28 mhz/v if divide - by - 2 oper a tion is selected (by programming div2 [db22] high in the n counter latch). the adf4360 family contains linearization ci r cuitry to minimize any variation of the product of i cp and k v .
data sheet adf4360 -2 rev. c | page 11 of 24 the operating current in the vco core is programmable in four steps: 5 ma, 10 ma, 15 ma, and 20 ma. this is controlled by bit pc1 and bit pc2 in the control latch. for vco frequencies above 2 ghz, only the 15 ma core current should be used , and for frequencies below 2 ghz, only 20 ma core current should be used. output stage the rf out a and rf out b pins of the adf4360 family are co n nected to the collectors of an npn differential pair driven by buffered outputs of the vco, as shown in figure 15 . to allow the user to optimize the power dissipati on vs . the output power requirements, the tail current of the differential pair is programmable via bit pl1 and bit pl2 in the control latch. four current levels can be set: 3.5 ma, 5 ma, 7.5 ma, and 11 ma. these levels gi v e output power levels of ?13 dbm, ?11 dbm, ?8 dbm, and ?6 dbm, respectively, using a 50 ? resistor to v dd and ac coupling into a 50 ? load. alternatively, both ou t puts can be combined in a 1 + 1:1 transformer or a 180 microstrip co u pler (see the o utput matching section). if the outputs are used individually, the optimum output stage consists of a shunt inductor to v dd . another feature of the adf4360 family is that the supply cu r rent to the rf output stage is shut down until the part achieves lock as measured by the digital lock detect circuitry. this is e n abled by the mute - till - lock detect (mtld) bit in the control latch. vco rf out a rf out b buffer/ divid e-by-2 04436-015 figure 15 . output stage adf4360 -2
adf4360 -2 data sheet rev. c | page 12 of 24 latch structure table 6 shows the three on - chip latches for the adf4360 family. the two lsbs determines which latch is programmed. table 6 . latch structure db20 db19 db18 db17 db16 db15 db14 db13 db12 db11 db10 db9 db8 db7 db6 db5 db4 db3 db2 db1 db0 c2 (0) c1 (0) pc1 pc2crm1m2 pdp cpcpg mtld pl1pl2 cpi1 cpi2 cpi3 cpi4 cpi5 cpi6 pd1 m3 cont rol bits muxo ut cont rol curr ent setti ng 2 curr ent setting 1 presca ler valu e core power level output power level db21 db22 db23 power- down 2 power- down 1 counter reset mute-till- ld cp gain cp three- state phase detector polarity pd2p1p2 db20 db19 db18 db17 db16 db15 db14 db13 db12 db11 db10 db9 db8 db7 db6 db5 db4 db3 db2 db1 db0 c2 (0) c1 (1) r1r2r3r4r5 r7r8r9r10 r11r12 r13 r14 abp1 abp2 ldp tmb bsc1 r6 control bits band select clock anti- backlash pulse width 14-bit reference counter db21 db22 db23 lock detect precision test mode bit reserved reserved divide- by-2 divide-by- 2 select bsc2 rsv rsv db20 db19 db18 db17 db16 db15 db14 db13 db12 db11 db10 db9 db8 db7 db6 db5 db4 db3 db2 db1 db0 c2 (1) c1 (0) a1a2a3a4a5 b1b2b3b4b5b6b7b8b9 b10 b11 b12 b13 rsv control bits 5-bit a counter 13-bit b counter control latch n counter latch r counter latch db21 db22 db23 cp gain reserved cpg div2 divsel 04436-016
data sheet adf4360 -2 rev. c | page 13 of 24 table 7 . control latch db 20 db 19 db 18 db 17 db 16 db 15 db 14 db 13 db 12 db11 db 10 db 9 db 8 db 7 db 6 db 5 db 4 db 3 db 2 db 1 db 0 c2 (0) c1 (0) pc1 pc2crm1m2 pdp cpcpg m tl d pl1pl2 cpi1 cpi2 cpi3 cpi4 cpi5 cpi6 pd1 m3 contr ol bits muxout control curr ent se tt ing 2 curr ent se tt ing 1 pr es ca ler value core power l ev el output power l ev el db 21 db 22 db 23 power- down 2 power- down 1 counter reset mute-till- ld cp gain cp three- s tate phase detect or polarit y pd2p1p2 cr 0 1 co un ter operat io n normal r, a, b co un ters held i n reset pc2 0 0 1 0 core p ow er l ev el 5ma 10 ma 15 ma pc1 0 1 1 1 20 ma cp 0 1 char ge pump output normal t hr ee-state pdp 0 1 pha se detector pol ar ity nega ti ve pos iti ve cpg 0 1 cp g ain curr ent se tti ng 1 curr ent se tti ng 2 mtld 0 1 mute-ti ll -lo ck detect dis ab led e nab led m3 m2 m1 output t hr ee-state o utput 0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 1 0 1 1 1 0 1 1 1 d ig ital lo ck detect (ac tive h ig h) n divider o utput dv dd r divider o utput n- chann el o pen- dra in lo ck detect se rial data o utput dgnd p2 p1 pres ca ler value 0 0 8/9 0 1 16 /17 1 0 32 /33 1 1 32 /33 ce pin pd2 pd1 mode 0 x x asy nchr onous power-down 1 x 0 normal o perat io n 1 0 1 asy nchr onous power-down 1 1 1 synchr onous power-down cpi6 cpi5 cpi4 i cp (ma) cpi3 cpi2 cpi1 4. 7k? 0.31 0.62 0.93 1.25 1.56 1.87 2.18 2.50 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 pl2 pl1 output power level curr ent power i nto 50? (using 50? to v vcc ) ?13 dbm ?11dbm ?8 dbm ?6 dbm 0 0 1 1 0 1 0 1 3.5ma 5.0ma 7.5ma 11.0ma 04436-017
adf4360 -2 data sheet rev. c | page 14 of 24 table 8 . n cou nter latch db20 db19 db18 db17 db16 db15 db14 db13 db1 2 db 11 db10 db9 db8 db7 db6 db5 db4 db3 db2 db1 db0 c2 (1) c1 (0) a1a2a3a4a5 b1b2b3b4b5b6b7b8b9b10 b11 b12 b13 rsv contro l bits 5-bit a counter 13-bit b counter db21 db22 db23 cp gain divide-b y- 2 select divide- by -2 rese r ved cpg div2 divsel this bit is not used by the device and is a don't care bi t. a5 a4 .......... a2 a1 a counter divide r a tio 00 .......... 0 0 0 00 .......... 0 1 1 00 .......... 1 0 2 00 .......... 1 1 3 .. .......... . . . .. .......... . . . .. .......... . . . 1 1 .......... 0 0 28 1 1 .......... 0 1 29 1 1 .......... 1 0 30 1 1 .......... 1 1 31 f4 (function l a tch) f astlock enable cp gain opera tion charge pum p current setting 1 is permanent ly used 0 0 charge pum p current setting 2 is permanent ly used 1 0 n = b p + a; p is prescaler v alue set in the contro l l a tch. b must be gre a ter than or equa l to a. for continuous ly adjacent v alues of (n f ref ), a t the outpu t , n min is (p 2 ?p). b13 b12 b11 b3 b2 b1 b counter divide r a tio .......... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 not allowed .......... 0 0 1 not allowed .......... 0 1 0 not allowed .......... 1 1 1 3 .......... . . . . . . . . . . . . . .......... . . . . .......... . . . . .......... 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 8188 .......... 1 0 1 8189 .......... 1 1 0 8190 .......... 1 1 1 8191 04436-018 div2 0 1 divide-by-2 fundamen tal output divide-by-2 divsel 0 1 divide-by -2 select (prescaler input) fundamen tal output selected divide-by-2 selected
data sheet adf4360 -2 rev. c | page 15 of 24 table 9 . r counter latch db20 db19 db18 db17 db16 db15 db14 db13 db12 db11 db10 db9 db8 db7 db6 db5 db4 db3 db2 db1 db0 c2 (0) c1 (1) r1r2r3r4r5 r7r8r9r10 r11r12 r13 r14 abp1 abp2 ldp tmb bsc1 r6 contr ol bits band select cloc k anti- backlash pulse width 14-bit reference counter db21 db22 db23 lock detect precision test mode bit reserved reserved bsc2 rsv rsv test mode bit should be set to 0 for normal operation. r14 r13 r12 r3 r2 r1 divide ratio .......... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 .......... 0 1 1 2 .......... 0 1 0 3 .......... 1 0 1 4 .......... . . . . . . . . . . . . . .......... . . . . .......... . . . . .......... 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 16380 .......... 1 0 1 16381 .......... 1 1 0 16382 .......... 1 1 1 16383 these bits are not used by the device and are don't care bits. 04436-019 ldp lock detect precision 0 three consecutive cycles of phase delay less than 15ns must occur before lock detect is set. 1 five consecutive cycles of phase delay less than 15ns must occur before lock detect is set. abp2 abp1 antibacklash pulse width 0 0 3.0ns 0 1 1.3ns 1 0 6.0ns 1 1 3.0ns bsc2 bsc1 band select clock divider 0 0 1 0 1 2 1 0 4 1 1 8
adf4360 -2 data sheet rev. c | page 16 of 24 power -up power - up sequence the correct programming sequence for the adf4360 - 2 after power - up is as: 1. r counter latch 2. control latch 3. n counter latch initial power - up initial power - up refer s to programming the part after the application of voltage to the av dd , dv dd , v vco , and ce pins. on in i tial power - up, an interval is required between programming the control latch and programming the n counter latch. this interval is necessary to allow t he transient behavior of the adf4360 - 2 during initial power - up to have settled. during initial power - up, a write to the control latch powers up the part and the bias currents of the vco begin to settle. if these cu r rents have not settled to within 10% of t heir steady - state value, and if the n counter latch is then programmed, the vco may not be able to oscillate at the desired frequency, which does not allow the band select logic to choose the correct frequency band and the adf4360 - 2 may not achieve lock. if the recommended interval is inserted and the n counter latch is programmed, the band select logic can choose the correct fr e quency band, and the part locks to the correct frequency. the duration of this interval is affected by the value of the capacitor on the c n pin (pin 14). this capacitor is used to reduce the close - in noise of the adf4360 - 2 vco. the reco m mended value of this capacitor is 10 f. using this value requires an interval of 5 ms between the latching in of the co n trol latch bits and the l atching in of the n counter latch bits. if a shorter d e lay is required, this capacitor can be reduced. a slight phase noise penalty is incurred by this change, which is ex plained further in tabl e 10 . table 10. c n capacitance vs. interval and phase noise c n value recommended interval be tween control latch and n counter latch open - loop phase noise @ 10 khz of f set 10 f 5 ms ? 86 dbc 440 nf 600 s ? 85 dbc clock power-up data le r counter latch data control latch data n counter latch data required interval control latch write to n counter latch write 04436-020 figure 16 . adf4360 - 2 power - up timing
data sheet adf4360 -2 rev. c | page 17 of 24 hardware power - up/power - down if the adf4360 - 2 is powered down via the hardware (using the ce pin) and powered up again without any change to the n counter register during power - down, the part locks at the correct frequency because it is already in the correct fr e quency band. the lock time depends on the value of capac i tance on the c n pin, which is <5 ms for 10 f capacitance. the smaller ca pacitance of 440 nf on this pin enables lock times of <600 s. the n counter value cannot be changed while it is in power - down because it may not lock to the correct fr e quency on power - up. if it is updated, the correct programming s e quence for the part after power - up is to the r counter latch, followed by the control latch, and finally the n counter latch, with the re quired interval between the control latch and n counter latch, as described in the initial power - up section. software power - up/power - down if the adf4360 - 2 is powered down via the software (using the co n trol latch) and powered up again without any change to the n counter latch during power - down, the part locks at the co r rect frequency because it is already in the correct frequency band. the lock time depends on the value of capac i tance on the c n pin, which is <5 ms for 10 f capacitance. the smaller ca pacitance of 440 nf on this pin enables lock times of <600 s. the n counter value cannot be changed while the par t is in power - down because it may not lock to the correct fr e quency on power - up. if it is updated, the correct programming se quence for the parts after power - up is to the r counter latch, followed by the control latch, and finally the n counter latch, with the required interval between the control latch and n counter latch, as described in the initial power - up section.
adf4360 -2 data sheet rev. c | page 18 of 24 control latch with (c2, c1) = (0, 0), the control latch is programmed. table 7 shows the input data fo r mat for programming the control latch. prescaler value in the adf4360 family, p2 and p1 in the control latch set the prescaler values. power - down db21 (pd2) and db20 (pd1) provide programmable powe r- down modes. in the programmed asynchronous power - down, the device powers down immediately after latching a 1 into bit pd1, with the condition that pd2 is loaded with a 0. in the pr o grammed synchronous power - down, the device power - down is gated by the charge pump to p revent unwanted frequency jumps. once the power - down is enabled by writing a 1 into bit pd1 (on the condition that a 1 i s also loaded to pd2), the device goes into power - down on the second rising edge of the r counter output, after le goes high. when the c e pin is low, the device is immediately disabled r e gardless of the state of pd1 or pd2. when a power - down is activated (either synchronous or asy n chronous mode), the following events occur: ? all active dc current paths are removed. ? the r, n, and timeout counters are forced to their load state conditions. ? the charge pump is forced into three - state mode. ? the digital lock detect circuitry is reset. ? the rf outputs are debiased to a high i m pedance state. ? the reference input buffer circuitry is di sabled. ? the input register remains active and capable of loa d ing and latching data. charge pump currents cpi3, cpi2, and cpi1 in the adf4360 family determine cu r rent setting 1. cpi6, cpi5, and cpi4 determine current setting 2. see the truth table in table 7 . output power level bit pl1 and bit pl2 set the output power level of the vco. see the truth table in table 7 . mute - till - lock detect (ld) db11 of the control latch in the adf43 60 family is the mute - till - lock detect bit. this function, when enabled, ensures that the rf outputs are not switched on until the pll is locked. cp gain db10 of the control latch in the adf4360 family is the charge pump gain bit. when it is programmed to 1, current se t ting 2 is used. when it is programmed to 0, current setting 1 is used. charge pump (cp) three- state this bit puts the charge pump into three - state mode when pro grammed to a 1. it should be set to 0 for normal operation. phase detector polari ty the pdp bit in the adf4360 family sets the phase detector polarity. the positive setting enabled by programming a 1 is used when using the on - chip vco with a passive loop filter or with an active noninverting filter. it can also be set to 0, which is re quired if an active inverting loop filter is used. muxout control the on - chip multiplexer is controlled by m3, m2, and m1. see the truth table in table 7 . counter reset db4 is the counter reset bit for the adf4360 f amily. when this is 1, the r counter and the a, b counters are reset. for normal operation, this bit should be 0. core power level pc1 and pc2 set the power level in the vco core. the reco m mended setting is 15 ma for frequencies above 2 ghz and 20 ma for f requencies below 2 ghz . no other settings are valid. see the truth table in table 7 .
data sheet adf4360 -2 rev. c | page 19 of 24 n counter latch with (c2, c1) = (1, 0), the n counter latch is programmed. table 8 shows the input data format for programming the n counter latch. a counter latch a5 to a1 program the 5 - bit a counter. the divide range is 0 (00000) to 31 (11111). reserved bits db7 is a spare bit that is reserved. it should be programmed to 0. b counter latch b13 to b1 program the b counter. the divide range is 3 (00.....0011) to 8191 (11....111). overall divide range the overall divide range is defined by (( p b ) + a ), where p is the prescaler value. cp gain db21 of the n counter latch in the adf4360 family i s the charge pump gain bit. when this bit is programmed to 1, cu r rent setting 2 is used. when programmed to 0, current setting 1 is used. this bit can also be programmed through db10 o f the co n trol latch. the bit always reflects the latest value written to it , whether through the control latch or the n counter latch. divide - by -2 db22 is the divide - by - 2 bit. when set to 1, the output d i vide - by - 2 function is chosen. when set to 0, normal operation o c curs. divide - by - 2 select db23 is the divide - by - 2 select bit. when programmed to 1, the divide - by - 2 output is selected as the prescaler input. when set to 0, the fundamental is used as the prescaler input. for example, using the output divide - by - 2 feature and a pfd fr e quency of 200 khz, the user needs a value of n = 10,000 to generate 1000 mhz. with the divide - by - 2 select bit high, the user can keep n = 5,000. r counter latch with (c2, c1) = (0, 1), the r counter latch is programmed. table 9 shows the input data format for pr ogramming the r counter latch. r counter r1 to r14 set the counter divide ratio. the divide range is 1 (00......001) to 16383 (111......111). antibacklash pulse width db16 and db17 set the antibacklash pulse width. lock detect precision db18 is the lock detect precision bit. this bit sets the number of re f erence cycles with less than 15 ns phase error for entering the locked state. with ldp at 1, five cycles are taken; with ldp at 0, three cycles are taken. test mode bit (tmb) db19 is the test mode bit an d should be set to 0. with tmb = 0, the contents of the test mode latch are ignored and normal operation occurs as determined by the contents of the control latch, r counter latch, and n counter latch. note that test modes are for factory testing only and should not be pr o grammed by the user. band select clock these bits set a divider for the band select logic clock input. the output of the r counter is by default the value used to clock the band select logic. if this value is too high (>1 mhz), a d i vider c an be switched on to divide the r counter output to a smaller value (see table 9 ). reserved bits db23 to db22 are spare bits that are reserved. they should be pro grammed to 0.
adf4360-2 data sheet rev. c | page 20 of 24 applications direct conversion modulator direct conversion architectures are increasingly being used to implement base station transmitters. figure 17 shows how adi parts can be used to implement such a system. the circuit block diagram shows the ad9761 txdac? being used with the ad8349 . the use of dual integrated dacs, such as the ad9761 with its specified 0.02 db and 0.004 db gain and offset matching characteristics, ensures minimum error contribution (over temperature) from this portion of the signal chain. the local oscillator is implemented using the adf4360-2. the low-pass filter was designed using adisimpll? for a channel spacing of 100 khz and an open-loop bandwidth of 10 khz. the frequency range of the adf4360-2 (1.85 ghz to 2.17 ghz) makes it ideally suited for the implementation of a w-cdma transceiver. the lo ports of the ad8349 can be driven differentially from the complementary rf out a and rf out b outputs of the adf4360-2. this gives better pe rformance than a single-ended lo driver and eliminates the often necessary use of a balun to convert from a single-ended lo input to the more desirable differential lo inputs for the ad8349 . the typical rms phase noise (100 hz to 100 khz) of the lo in this configuration is 2.1. the ad8349 accepts lo drive levels from ?10 dbm to 0 dbm. the optimum lo power can be software programmed on the adf4360-2, which allows levels from ?13 dbm to ?6 dbm from each output. the rf output is designed to drive a 50 load but must be ac- coupled, as shown in figure 17. if the i and q inputs are driven in quadrature by 2 v p-p signals, the resulting output power from the modulator is approximately 2 dbm. ad9761 txdac ad8349 refio fsadj modulated digital data qoutb iouta ioutb qouta 2k ? low-pass filter low-pass filter spi-compatible serial bus adf4360-2 v vco v vco v vco cpgnd agnd dgnd rf out b rf out a cp 1nf 470pf 220pf 6.8nf 47nh 47nh 1.8pf 1.8pf 100pf to rf pa 3.6nh 3.6nh 1nf1nf 4.7k ? 13k? 6.8k ? r set c c le data clk ref in fref in c n v tune dv dd av dd ce muxout vps1 ibbp ibbn qbbp qbbn loip loin vps2 5 4 24 7 20 23 2 21 6 14 16 17 18 19 13 1 3 8 9 10 11 22 15 12 v dd lock detect phase splitter 04436-021 51? 10f figure 17. direct conversion modulator
data sheet adf4360 -2 rev. c | page 21 of 24 fixed frequency lo figure 18 shows the adf4360 - 2 used as a fixed frequency lo at 2.0 ghz. the low - pass filter was designed using adisimpll for a channel spacing of 8 mhz and an open - loop bandwidth of 40 khz. the maximum pfd frequency of the adf4360 - 2 is 8 mhz. because using a larger pfd frequency allows the use of a smaller n, the in - band phase noise is reduced to as low as poss i ble, C 99 dbc/hz. the 40 khz bandwidth is chosen to be just greater than the poin t at which the open - loop phase noise of the vco is C 99 dbc/hz, thus giving the best possible int e grated noise. the typical rms phase noise (100 hz to 100 khz) of the lo in this configur a tion is 0.3. the reference frequency is from a 16 mhz tcxo from fox; thus, an r value of 2 is programmed. taking into a c count the high pfd frequency and its effect on the band select logic, the band select clock divider is enabled. in this case, a value of 8 is chosen. a very simple pull - up resistor and dc blocking capacit or complete the rf output stage. spi-com pa tible seria l bus adf4360-2 v vco v vco fox 801be-160 16mhz v vco cpgnd agnd dgnd rf out b rf out a cp 1nf 3.3nf 18.0nf 51? 51? 51? 100pf 100pf 1nf1nf 10f 4.7k? 560? r set c c le dat a clk ref in c n v tune dv dd av dd ce muxout 5 4 24 7 20 23 2 21 6 14 16 17 18 19 13 1 3 8 9 10 11 22 15 12 v vdd lock detect 04436-022 figure 18 . fixed frequency lo interfacing the adf4360 family has a simple spi? - compatible serial inte r face for writing to the device. clk, data, and le control the data transfer. when le goes high , the 24 bits that are clocked into the appropriate register on each rising edge of clk are transferred to the appropriate latch. see figure 2 for the ti m ing diagram and table 5 for the latch truth table. the maximum allowable serial clock rate is 20 mhz. this means that the maximum update rate possible is 833 khz or one update every 1.2 s. this is certainly more than ad e quate for systems that have typical lock times in hund reds of micr o seconds. aduc812 interface figure 19 shows the interface between the adf4360 family and the aduc812 microconverter?. because the aduc812 is based on an 8051 core, this interface can be used with any 80 51- based mi crocontroller. the microconverter is set up for spi master mode with cpha = 0. to initiate the operation, the i/o port driving le is brought low. each latch of the adf4360 family needs a 24 - bit word, which is accomplished by writing three 8- bit bytes from the microconverter to the device. when the third byte is written, the le input should be brought high to complete the transfer. 04436-023 aduc812 adf4360-x sclk sdat a le ce muxout (lock detect) sclock mosi i/o ports figure 19 . aduc812 to adf4360 - x interface i/o port lines on the aduc812 are also used to control powe r down (ce input) and detect lock (muxout configured as lock detect and polled by the port input). when operating in the described mode, the maximum sclock rate of the aduc812 is 4 mhz. this means that the maximum rate at which the ou t put frequ ency can be changed is 166 khz. adsp - 21xx interface figure 20 shows the interface between the adf4360 family and the adsp - 21xx digital signal processor. the adf4360 family needs a 24 - bit serial word for each latch w rite. the eas i est way to accomplish this using the adsp - 21xx family is to use the autobuffered transmit mode of operation with alternate fra m ing. this provides a means for transmitting an entire block of serial data before an interrupt is generated. 04436-024 adsp-21xx tfs i/o ports adf4360-x sclk sdat a le ce muxout (lock detect) sclock mosi figu re 20 . adsp - 21xx to adf4360 - x interface set up the word length for 8 bits and use three memory loca tions for each 24 - bit word. to program each 24 - bit latch, store the 8 - bit bytes, enable the autobuffered mode, and write to the tran smit register of the dsp. this last operation initiates the autobuffer transfer.
adf4360 -2 data sheet rev. c | page 22 of 24 pcb design guideline s for chip scale pac k age the leads on the chip scale package (cp - 24) are rectangular. the printed circuit board pad for these should be 0.1 mm longer than the package lead length and 0.05 mm wider than the package lead width. the lead should be centered on the pad to e n sure that the solder joint size is maximized. the bottom of the chip scale package has a central thermal pad. the thermal pad on the printe d circuit board should be at least as large as this exposed pad. on the printed circuit board, there should be a clearance of at least 0.25 mm between the thermal pad and the inner edges of the pad pattern to ensure that shor t ing is avoided. thermal vias can be used on the printed circuit board thermal pad to improve thermal performance of the package. if vias are used, they should be incorporated into the thermal pad at a 1.2 mm pitch grid. the via diameter should be between 0.3 mm and 0.33 mm, and the vi a barrel should be plated with 1 ounce of copper to plug the via. the user should connect the printed circuit thermal pad to agnd. this is internally connected to agnd. output matching there are a number of ways to match the output of the adf4360 - 2 for op timum operation; the most basic is to use a 50 ? resistor to v vco . a dc bypass capacitor of 100 pf is connected in series, as shown in figure 21 . because the resi s tor is not frequency dependent, this provides a good broa d band match. the output power in this circuit typically gives ?6 dbm ou t put power into a 50 ? load. 100pf 04436-025 rf out v vco 50? 51? figure 21 . simple adf4360 - 2 output stage a better solution is to use a shunt inductor (acting as an rf choke) to v vco. this gives a better match and, therefore, more ou t put power. additionally, a series inductor is added after the dc bypass capacitor to provide a resonant lc circuit. this tunes the oscillator output and provides approximately 10 db additional r e jection of the second harmonic. the shunt inductor needs to be a rel a tively high value (>40 nh). experiments have shown that the circuit shown in figure 22 provides an e x cellent match to 50 ? over the operating range of the adf4360 - 2. this gives approximately ?3 dbm ou t put power across the frequency range of the adf4360 - 2. both single- ended archite c tures can be examined using the ev - adf4360 - 2eb1 z evalu a tion board. 3.6nh 47nh 1.8pf 04436-026 rf out v vco 50? figu re 22 . optimum adf4360 - 2 output stage if the user does not need the differential outputs available on the adf4360 - 2, the user can either terminate the unused ou t put or combine both outputs using a balun. the circuit in figure 23 shows how best to combine the outputs. 2.2nh 3.6nh 47nh 3.6nh 1.8pf 10pf 1.8pf 50? 2.2nh rf out a v vco rf out b 04436-027 figure 23 . balun for combining adf4360 - 2 rf outputs the circuit in figure 23 is a lumped - lattice - type lc balu n. it is de signed for a center frequency of 2.0 ghz and outputs 2.0 dbm at this frequency. the series 2.2 nh inductor is used to tune out any par a sitic capacitance due to the board layout from each input, and the remainder of the circuit is used to shift t he output of one rf input by +90 and the second by ?90, thus co m bining the two. the action of the 3.6 nh inductor and the 1.8 pf capacitor accomplishes this. the 47 nh is used to provide an rf choke to feed the supply voltage, and the 10 pf ca pacitor pr ovides the necessary dc block. to ensure good rf performance, the circuits in figure 22 and figure 23 are implemented with coi l craft 0402/0603 inductors and avx 0402 thin - fil m capac itors. alternatively, instead of the lc balun shown in figure 23 , both ou t puts can be combined using a 180 rat - race coupler.
data sheet adf4360 -2 rev. c | page 23 of 24 outline dimensions compliant to jedec standards mo-220-vggd-2 04-09-2012- a 1 0.50 bsc pin 1 indic at or 2.50 ref 0.50 0.40 0.30 top view 12 max 0.80 max 0.65 ty p sea ting plane coplanarit y 0.08 1.00 0.85 0.80 0.30 0.23 0.18 0.05 max 0.02 nom 0.20 ref 0.25 min 2.45 2.30 sq 2.15 24 7 19 12 13 18 6 0.60 max 0.60 max pin 1 indic at or 4.10 4.00 sq 3.90 3.75 bsc sq exposed pad for proper connection of the exposed pad, refer to the pin configuration and function descriptions section of this data sheet. bot t om view figure 24 . 24 - lead lead frame chip scale package [lfcsp _vq ] 4 mm 4mm body, very thin quad (cp - 24 - 2) dimensions shown in millimeters ordering guide model 1 temperature range frequency range package description package option adf4360-2bcpz ? 40c to +85c 1850 mhz to 2170 mhz 24- lead lfcsp _vq cp-24-2 adf4360-2bcpzrl ? 40c to +85c 1850 mhz to 2170 mhz 24- lead lfcsp _vq cp-24-2 adf4360-2bcpzrl7 ? 40c to +85c 1850 mhz to 2170 mhz 24- lead lfcsp _vq cp-24-2 ev -adf4360- 2eb1 z evaluation board 1 z = rohs compliant part .
adf4360 -2 data sheet rev. c | page 24 of 24 notes purchase of licensed i 2 c components of analog devices or one of its sublicensed associated companies conveys a license for the pu r chaser under the philips i 2 c patent rights to use these components in an i 2 c system, provided that the system conforms to the i 2 c stan dard specification as defined by phi l ips. ? 2004 C 2012 analog devices, inc. all rights reserved. trademarks and registered trademarks are the property of their respective owners. d04436 C0C11 /12(c)

▲Up To Search▲

Price & Availability of EV-ADF4360-2EB1Z

	To Download EV-ADF4360-2EB1Z Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .