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1024-/256-position, 1% resistor tolerance error, spi interface and 50-tp memory digital rheostat data sheet ad5270 / ad5271 rev. f document feedbac k 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 rights 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 ?2009C2013 analog devices, inc. all rights reserved. technical suppor t www.analog.com features single-channel, 1024-/256-position resolution 20 k, 50 k, 100 k nominal resistance maximum 1% nominal resistor tolerance error 50-times programmable (50-tp) wiper memory rheostat mode temperature coefficient: 5 ppm/c 2.7 v to 5.5 v single-supply operation 2.5 v to 2.75 v dual-supply operation for ac or bipolar operations spi-compatible interface wiper setting readback power on refreshed from 50-tp memory thin lfcsp, 10-lead, 3 mm 3 mm 0.8 mm package compact msop, 10-lead, 3 mm 4.9 mm 1.1 mm package applications mechanical rheostat replacements op-amp: variable gain control instrumentation: gain, offset adjustment programmable voltage to current conversions programmable filters, delays, time constants programmable power supply sensor calibration functional block diagram 10/8 v dd v ss ext_cap gnd a w ad5270/ad5271 sclk din sdo serial interface power-on reset rdac register 50-tp memory block sync 08077-001 figure 1. general description the ad5270/ad5271 1 are single-channel, 1024-/256-position digital rheostats that combine industry leading variable resistor performance with nonvolatile memory (nvm) in a compact package. the ad5270/ad5271 ensure less than 1% end-to-end resistor tolerance error and offer 50-times programmable (50-tp) memory. the guaranteed industry leading low resistor tolerance error feature simplifies open-loop applications as well as precision calibration and tolerance matching applications. the ad5270/ad5271 device wiper settings are controllable through the spi digital interface. unlimited adjustments are allowed before programming the resistance value into the 50-tp memory. the ad5270/ad5271 do not require any external voltage supply to facilitate fuse blow and there are 50 opportunities for permanent programming. during 50-tp activation, a permanent blow fuse command freezes the resistance position (analogous to placing epoxy on a mechanical trimmer). the ad5270/ad5271 are available in a 3 mm 3 mm, 10-lead lfcsp package and in a 10-lead msop package. the parts are guaranteed to operate over the extended industrial temperature range of ?40c to +125c. 1 protected by u.s.patent number 7688240
ad 5270/ad5271 data sheet rev. f | page 2 of 24 table of contents features .............................................................................................. 1 applications ....................................................................................... 1 functional block diagram .............................................................. 1 general description ......................................................................... 1 revision history ............................................................................... 2 specifications ..................................................................................... 3 electrical characteristics ad5270 .......................................... 3 electrical characteristics ad5271 .......................................... 5 interface timing specifications .................................................. 7 absolute maximum ratings ............................................................ 9 thermal resistance ...................................................................... 9 esd caution .................................................................................. 9 pin configuration and function descriptions ........................... 10 typ ical performance characteristics ........................................... 11 test circuits ..................................................................................... 17 theory of operation ...................................................................... 18 serial data interface ................................................................... 18 shift register ............................................................................... 18 rdac register ............................................................................ 18 50- tp memory block ................................................................ 18 write protection ......................................................................... 18 rdac and 50 - tp read operation .......................................... 19 shut - down mode ....................................................................... 20 resistor performance mode ...................................................... 20 reset ............................................................................................. 20 sdo pin and daisy - chain operation ..................................... 21 rdac architecture .................................................................... 21 programming the variable resistor ......................................... 22 ext_cap capacitor .................................................................. 22 terminal voltage operating range ......................................... 22 power - up sequence ................................................................... 22 outline dimensions ....................................................................... 23 ordering guide .......................................................................... 24 revision history 3 /1 3 rev. e to rev. f changed resistor noise density, r aw = 20 k? from 50 nv/hz to 13 nv/hz; table 1 ...................................................................... 4 changed resistor noise density, r aw = 20 k? from 50 nv/hz to 13 nv/hz; table 4 ...................................................................... 6 updated outline dimensions ....................................................... 23 12/10 rev. d to re v. e changes to sdo pin description ................................................. 1 0 changes to sdo pin and d aisy - chain operation section ....... 21 11/10 rev. c to rev. d changes to figure 25 ...................................................................... 14 9 /10 rev. b to rev. c changes to figure 3 caption ........................................................... 7 changes to figure 4 caption ........................................................... 8 deleted daisy - chain operation section, added sdo pin and daisy - chain operation section ................................................... 21 5 /1 0 rev. a to rev. b added lfcsp throughout .............................................................. 1 changed otp to 50 - tp throughout .............................................. 1 changes to product title, features, and general description .... 1 changes to table 1 ............................................................................. 3 added table 3; renumbered sequentially ..................................... 4 changes to table 4 ............................................................................. 5 added table 6 .................................................................................... 6 changes to table 8 and table 9 ........................................................ 9 added figure 6 and changes to table 10 ..................................... 10 replaced typical performance characteristics section ............ 11 changes to figure 44 ...................................................................... 21 updated outline dimensions ....................................................... 23 changes to ordering guide .......................................................... 24 3/10 rev. 0 to rev. a changes to product title and general de scription..................... 1 changes to theory of operation section ..... ..............................14 10/09 rev ision 0: initial version
data sheet ad5270/ad5271 rev. f | page 3 of 24 specifications electrical character istics ad5270 v dd = 2.7 v to 5.5 v, v ss = 0 v; v dd = 2.5 v to 2.75 v, v ss = ? 2.5 v to ? 2.75 v; ?40c < t a < +12 5c, unless otherwise noted. table 1 . parameter symbol test conditions/comments min typ 1 max unit dc characteristics rheostat mode resolution 10 bits resistor integral nonlinearity 2 , 3 r - inl r aw = 20 k?, | v dd ? v ss | = 3.0 v to 5.5 v ?1 +1 lsb r aw = 20 k?, |v dd ? v ss | = 2.7 v to 3.0 v ?1 +1.5 lsb r aw = 50 k?, 100 k? ?1 +1 lsb resistor differential nonlinearity 2 r - dnl ?1 +1 lsb nominal r esistor tolerance r - perf mode 4 see table 2 and table 3 ?1 0.5 +1 % normal mode 15 % resistance temperature coefficient 5 , 6 code = full scale 5 ppm/c wiper resistance code = z ero scale 35 70 ? resistor terminals terminal voltage range 5 , 7 v ss v dd v capacitance 5 a f = 1 mhz, measured to gnd, code = half scale 90 pf capacitance 5 w f = 1 mhz, measured to gnd, code = half scale 40 pf common - mode leakage current 5 v a = v w 50 na digital inputs input logic 5 high v inh 2.0 v low v inl 0.8 v input current i in 1 a input capacitance 5 c in 5 pf digital output output voltage 5 high v oh r pull_up = 2.2 k ? to v dd v dd ? 0.1 v low v ol r pull_up = 2.2 k ? to v dd v dd = 2.7 v to 5.5 v, v ss = 0 v 0.4 v v dd = 2.5 v to 2.75 v, v ss = ?2.5 v to ?2.75 v 0.6 v tristate leakage current ?1 +1 a output capacitance 5 5 pf power supplies single - supply power range v ss = 0 v 2.7 5.5 v dual - supply power range 2.5 2.75 v supply current positive i dd 1 a negative i ss ?1 a 50- tp store current 5 , 8 positive i dd_otp_store 4 ma negative i ss_otp_store ?4 ma otp read current 5 , 9 positive i dd_otp_read 500 a negative i ss_otp_read ?500 a
ad5270/ad5271 data sheet rev. f | page 4 of 24 parameter symbol test conditions/comments min typ 1 max unit power dissipation 10 v ih = v dd or v il = gnd 5.5 w power supply rejection ratio 5 psrr v dd /v ss = 5 v 10% db r aw = 20 k? ?66 ?55 r aw = 50 k? ?75 ?67 r aw = 100 k? ?7 8 ?7 0 dynamic characteristics 5 , 11 bandwidth ?3 db, r aw = 10 k?, terminal w, see figure 42 khz r aw = 20 k? 300 r aw = 50 k? 120 r aw = 100 k? 60 total harmonic distortion v a = 1 v rms, f = 1 khz, code = half scale db r aw = 20 k? ?90 r aw = 50 k? ?88 r aw = 100 k? ?85 resistor noise density code = half scale, t a = 25c nv/hz r aw = 20 k? 13 r aw = 50 k? 25 r aw = 100 k? 32 1 typical specifications represent average readings at 25 c, v dd = 5 v , and v ss = 0 v . 2 resistor position nonlinearity error ( r - inl ) is the deviation from an ideal value measured between the maximum resistance and the minimum resistance wiper positions. r - dnl measures the relative step change from ideal between successive tap positions. 3 the maximum current in each code is defined by i aw = (v dd ? 1)/r aw . 4 the terms resistor performance mode and r - perf mode are used interchangeably. see the resistor performance mode section. 5 guaranteed by design and not subje ct to production test. 6 see figure 25 for more details. 7 r esistor terminal a and resistor terminal w have no limitations on polarity with respect to each other. dual - supply operation enables ground referenced bipolar signal adju stment. 8 different from operating current, the supply current for the fuse program lasts approximately 5 5 m s. 9 different from operating current, the supply current for the fuse read lasts approximately 500 n s . 10 p diss is calculated from (i dd v dd ) + (i ss v ss ). 11 all dynamic characteristics use v dd = + 2.5 v, v ss = ? 2. 5 v. table 2 . ad5270 20 k? resistor performance mode code range resistor tolerance p er code |v dd ? v ss | = 4.5 v to 5.5 v |v dd ? v ss | = 2.7 v to 4.5 v r - tolerance 1% r - t olerance from 0x078 to 0x3ff from 0x0be to 0x3ff 2% r - t olerance from 0x037 to 0x3ff from 0x055 to 0x3ff 3% r - t olerance from 0x028 to 0x 3 ff from 0x037 to 0x 3 ff table 3 . ad5270 50 k? and 100 k? resistor performance mode code range resistor tolerance per code r aw = 50 k? r aw = 100 k? r - tolerance 1% r - tolerance from 0x078 to 0x3ff from 0x04b to 0x3ff 2% r - tolerance from 0x055 to 0x3ff from 0x032 to 0x3ff 3% r - tolerance from 0x032 to 0x3ff from 0x019 to 0x3ff
data sheet ad5270/ad5271 rev. f | page 5 of 24 electrical character istics ad527 1 v dd = 2.7 v to 5.5 v, v ss = 0 v; v dd = 2.5 v to 2.75 v, v ss = ?2.5 v to ?2.75 v; ?40c < t a < +12 5c, unless otherwise not ed. table 4 . parameter symbol test conditions/comments min typ 1 max unit dc characteristics rheostat mode resolution 8 bits resistor integral nonlinearity 2 , 3 r - inl ? 1 +1 lsb resistor differential nonlinearity 2 r - dnl ?1 +1 lsb nominal resistor tolerance r - perf mode 4 see table 5 and table 6 ?1 0.5 +1 % normal mode 15 % resistance temperature coefficient 5 , 6 code = full scale 5 ppm/c wiper resistance code = zero scale 35 70 ? resistor terminals terminal voltage range 5 , 7 v ss v dd v capacitance 5 a f = 1 mhz, measured to gn d, code = half scale 90 pf capacitance 5 w f = 1 mhz, measured to gnd, code = half scale 40 pf common - mode leakage current 5 v a = v w 50 na digital inputs input logic 5 high v inh 2.0 v low 5 v inl 0.8 v input current i in 1 a input capacitance 5 c in 5 pf digital output output voltage 5 high v oh r pull_up = 2.2 k ? to v dd v dd ? 0.1 v low v ol r pull_up = 2.2 k ? to v dd v dd = 2.7 v to 5.5 v, v ss = 0 v 0.4 v v dd = 2.5 v to 2.75 v, v ss = ?2.5 v to ?2.75 v 0.6 v tri s tate leakage current ?1 +1 a output capacitance 5 5 pf power supplies single - supply power range v ss = 0 v 2.7 5.5 v dual - supply power range 2.5 2.75 v supply current positive i dd 1 a negative i ss ?1 a 50- tp store current 5 , 8 positive i dd_otp_store 4 ma negative i ss_otp_store ?4 ma otp read current 5 , 9 positive i dd_otp_read 500 a negative i ss_otp_read ?500 a power dissipation 10 v ih = v dd or v il = gnd 5.5 w power supply rejection ratio 5 psrr v dd / v ss = 5 v 10% db r aw = 20 k? ?66 ?55 r aw = 50 k? ?75 ?67 r aw = 100 k? ?78 ? 7 0
ad5270/ad5271 data sheet rev. f | page 6 of 24 parameter symbol test conditions/comments min typ 1 max unit dynamic charac teristics 5 , 11 bandwidth ?3 db, r aw = 10 k?, terminal w, see figure 42 khz r aw = 20 k? 300 r aw = 50 k? 120 r aw = 100 k? 60 total harmonic distortion v a = 1 v rm s, f = 1 khz, code = half scale db r aw = 20 k? ?90 r aw = 50 k? ? 88 r aw = 100 k? ? 85 resistor noise density code = half scale , t a = 25c nv/hz r aw = 20 k? 13 r aw = 50 k? 25 r aw = 100 k? 32 1 typical specifications represent average readings at 25 c, v dd = 5 v , and v ss = 0 v . 2 resistor position nonlinearity error ( r - inl ) is the deviation from an ideal value measured be tween the maximum resistance and the minimum resistance wiper positions. r - dnl measures the relative step change from ideal between successive tap positions. 3 the maximum current in each code is defined by i aw = (v dd ? 1)/r aw . 4 the terms resistor perfor mance mode and r - perf mode are used interchangeably. see the resistor performance mode section. 5 guaranteed by design and not subject to production test. 6 see figure 25 for more details. 7 r esistor term inal a and resistor terminal w have no limitations on polarity with respect to each other. dual - supply operation enables ground referenced bipolar signal adjustment. 8 different from operating current, the supply current for the fuse program lasts approxim ately 55 m s. 9 different from operating current, the supply current for the fuse read lasts approximately 500 n s . 10 p diss is calculated from (i dd v dd ) + (i ss v ss ). 11 all dynamic characteristics use v dd = + 2.5 v, v ss = ? 2. 5 v. table 5 . ad527 1 20 k? resistor performance mode code range resistor tolerance per code |v dd ? v ss | = 4.5 v to 5.5 v |v dd ? v ss | = 2.7 v to 4.5 v r - tolerance 1% r - tolerance from 0x1e to 0xff from 0x32 to 0xff 2% r - tolerance from 0x0f to 0xff from 0 x19 to 0xff 3% r - tolerance from 0x06 to 0xff from 0x0e to 0xff table 6 . ad5271 50 k? and 100 k? resistor performance mode code range resistor tolerance per code r aw = 50 k? r aw = 100 k? r - tolerance 1% r - tolerance from 0x1e t o 0x ff from 0x14 to 0x ff 2% r - tolerance from 0x14 to 0x ff from 0x0f to 0x ff 3% r - tolerance from 0x0a to 0x ff from 0x0a to 0x ff
data sheet ad5270/ad5271 rev. f | page 7 of 24 interface timing specifications v dd = 2.5 v to 5.5 v, v ss = 0 v; v dd = 2.5 v, v ss = ?2.5 v; all specifications t min to t max , unless otherwise noted. table 7. parameter limit 1 unit test conditions/comments t 1 2 20 ns min sclk cycle time t 2 10 ns min sclk high time t 3 10 ns min sclk low time t 4 15 ns min sync to sclk falling edge setup time t 5 5 ns min data setup time t 6 5 ns min data hold time t 7 1 ns min sclk falling edge to sync rising edge t 8 3, 4 500 ns min minimum sync high time t 9 15 ns min sync rising edge to next sclk fall ignored t 10 5 450 ns max sclk rising edge to sdo valid t rdac_r-perf 2 s max rdac register write command execute time t rdac_normal 600 ns max rdac register write command execute time t memory_read 6 s max memory readback execute time t memory_program 350 ms max memory program time t reset 0.6 ms max reset 50-tp restore time t power-up 6 2 ms max power-on 50-tp restore time 1 all input signals are specified with tr = tf = 1 ns/v (10% to 90% of v dd ) and timed from a voltage level of (v il + v ih )/2. 2 maximum sclk frequency is 50 mhz. 3 refer to t rdac_r-per and t rdac_normal for rdac register write operations. 4 refer to t memory_read and t memory_program for memory comma nds operations. 5 r pull_up = 2.2 k to v dd with a capacitance load of 168 pf. 6 maximum time after v dd ? v ss is equal to 2.5 v. shift register and timing diagrams data bits db9 (msb) db0 (lsb) d7 d6 d5 d4 d3 d2 d1 d0 control bits c0c1 c2 d9 d8 c3 00 08077-002 figure 2. shift register content 0 0 c3 c2 d7 d6 d5 d2 d1 d0 sclk sdo din sync t 7 t 9 t 1 t 2 t 4 t 3 t 8 t 5 t 6 08077-003 figure 3. write timing diagram (cpol = 0, cpha = 1)
ad5270/ad5271 data sheet rev. f | page 8 of 24 00 00 c3 c3 x x c3 d1 d0 d1 d0 d0 d0 sclk sdo din sync t 10 t 9 08077-004 figure 4. read timing diagram (cpol = 0, cpha = 1)
data sheet ad5270/ad5271 rev. f | page 9 of 24 absolute maximum rat ings t a = 25c, unless otherwise noted. table 8 . parameter ratin g v dd to gnd C 0.3 v to +7.0 v v ss to gnd +0.3 v to ?7.0 v v dd to v ss 7 v v a , v w to gnd v ss ? 0.3 v, v dd + 0.3 v digital input and output voltage to gnd ?0.3 v to v dd + 0.3 v ext_cap to v ss 7 v i a , i w continuous r a w = 20 k ? 3 ma r a w = 50 k ? , 100 k ? 2 ma pulsed 1 frequency > 10 khz mcc 2 /d 3 frequency 10 khz mcc 2 /d 3 operating temperature range 4 ?40c to +125c maximum junction temperature (t j maximum) 150c storage temperature range ?65c to +150c reflow solderi ng peak temperature 260c time at peak temperature 20 sec to 40 sec package power dissipation (t j max ? t a )/ ja 1 maximum terminal current is bounded by the maximum current handling of the switches, maximum power dissipation of the package, and maximum applied voltage across any two of the a and w terminals at a given resistance. 2 maximum continuous current. 3 pulse duty factor. 4 includes programming of 50 - tp memory. stresses above those listed under absolute maximum ratings may cause permanent damage to the device. this is a stress rating only and fu nctional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. ther mal resistance ja is defined by jedec specification jesd - 51 and the value is dependent on the test board and test environment. table 9 . thermal resistance package type ja 1 jc unit 10- lead lfcsp 50 3 c/w 10- lead msop 135 n/a c/w 1 jedec 2s 2p test board, still air (0 m/s air flow). esd caution
ad5270/ad5271 data sheet rev. f | page 10 of 24 pin configuration and fu nction descriptions v dd 1 1 v ss 2 2 a 3 3 w 4 4 sdo 10 9 8 sclk 7 5 ext_cap din 6 gnd ad5270/ ad5271 top view (not to scale) sync 08077-005 figure 5. msop pin configuration sync v dd 1 v ss 2 a 3 w 4 sdo 10 9 8 sclk 7 5 ext_cap din 6 gnd notes 1. the exposed pad is left floating or is tied to v ss . ad5270/ ad5271 (exposed pad) 08077-040 figure 6. lfcsp pin configuration table 10. pin function descriptions pin no. mnemonic description 1 v dd positive power supply. decouple this pin with 0.1 f ceramic capacitors and 10 f capacitors. 2 a terminal a of rdac. v ss v a v dd . 3 w wiper terminal of rdac. v ss v w v dd . 4 v ss negative supply. connect to 0 v for single-supply ap plications. decouple this pin with 0.1 f ceramic capacitors and 10 f capacitors. 5 ext_cap external capacitor. connect a 1 f capacitor between ext_cap and v ss . this capacitor must have a voltage rating of 7 v. 6 gnd ground pin, logic ground reference. 7 sdo serial data output. this pin can be used to clock data from the shift re gister in daisy-chain mode or in readback mode. this open-drain output requires an ex ternal pull-up resistor ev en if it is not use. 8 din serial data line. this pin is used in conjunction with the sclk line to cloc k data into or out of the 16-bit input register. 9 sclk serial clock input. data is clocked into the shift register on the falling edge of the serial clock input. data can be transferred at rates up to 50 mhz. 10 sync falling edge synchronization signal. this is the frame synchronization signal for the input data. when sync goes low, it enables the shift register and data is transferred in on the falling edges of the subsequent clocks. the selected register is updated on the rising edge of sync following the 16 th clock cycle. if sync is taken high before the 16 th clock cycle, the rising edge of sync acts as an interrupt, and the write sequence is ignored by the rdac. epad exposed pad leave floating or connected to v ss .
data sheet ad5270/ad5271 rev. f | page 11 of 24 typical perfo rmance characteristi cs ? 0.4 ? 0.2 0 0.2 0.4 0.6 0.8 0 128 256 384 512 640 768 896 1023 inl (lsb) code (decimal) +125c +25c ?40c r aw = 20k? 08077-010 figure 7. r - inl in r - perf mode vs . code vs . temperature ( ad5270 ) code (decimal) dnl (lsb) ?0.6 ?0.5 ?0.4 ?0.3 ?0.2 ?0.1 0 0.1 0.2 0 128 256 384 512 640 768 896 1023 +25c ?40c +125c r aw = 20k? 08077-011 figure 8. r - dnl in r - perf mode vs. code vs. temperature (ad5270) ? 0.10 0 0.10 0.40 0.20 0.30 0.50 inl (lsb) code (decimal) 0 128 256 384 512 640 768 896 1023 +125c +25c ?40c r aw = 20k? 08077-014 figure 9. r - inl in normal mode vs. code vs. temperature (ad5270) 0 256 512 768 1023 code (decimal) 0.8 0.6 0.4 0.2 0 ?0.2 ?0.4 inl (lsb) 20k? 50k? 100k? t a = 25c 08077-111 figure 10 . r - inl in r - perf mode vs. code vs. nominal resistance (ad5270) 0 256 512 768 1023 code (decimal) 0.6 0.4 0.2 0 ?0.2 ?0.4 ?0.6 dnl (lsb) 20k? 50k? 100k? t a = 25c 08077-120 figure 11 . r - dnl in r - perf mode vs. code vs. nominal resistance (ad5270) 0 256 512 768 1023 code (decimal) 0.4 0.6 0.2 0 ?0.2 ?0.4 inl (lsb) 20k? 50k? 100k? t a = 25c 08077-121 figure 12 . r - inl in normal mode vs. code vs. nominal resistance (ad5270)
ad5270/ad5271 data sheet rev. f | page 12 of 24 ? 0.15 ? 0.10 ? 0.05 0.10 0 0.05 0.15 dnl (lsb) code (decimal) 0 128 256 384 512 640 768 896 1023 +125c +25c ?40c r aw = 20k? 08077-015 figure 13 . r - dnl in normal mode vs. code vs. temperature (ad5270) code (decimal) 0 64 128 192 255 ? 0.10 ? 0.05 0 0.15 0.05 0.10 0.20 in l (lsb) +125c +25c ?40c r aw = 20k? 08077-013 figure 14 . r - inl in r - perf mode vs. code vs. temperature (ad5271) code (decimal) 0 64 128 192 255 ?0.14 ?0.12 ?0.10 ?0.08 ?0.06 ?0.04 ?0.02 0 0.02 0.04 0.06 dnl (lsb) +125c +25c ?40c r aw = 20k? 08077-012 figure 15 . r - dnl in r - perf mode vs. code vs. temperature (ad5271) 0 256 512 768 1023 code (decimal) 0.15 0.10 0.05 0 ?0.10 ?0.05 ?0.15 ?0.20 dnl (lsb) 20k? 50k? 100k? t a = 25c 08077-122 figure 16 . r - dnl in normal mode vs. code vs . nominal resistance (ad5270) code (decimal) 0 64 128 192 255 0.15 0.10 0.05 0 ?0.10 ?0.05 inl (lsb) 20k? 100k? t a = 25c 08077-123 figure 17 . r - inl in r - perf mode vs. code vs. nominal resistance (ad5271) code (decimal) 0 64 128 192 255 0.15 0.10 0.05 0 ?0.10 ?0.15 ?0.05 dnl (lsb) 20k? 100k? t a = 25c 08077-125 figure 18 . r - dnl in r - perf mode vs. code vs. nominal resistance (ad5271)
data sheet ad5270/ad5271 rev. f | page 13 of 24 code (decimal) 0 64 128 192 255 ? 0.02 0 0.02 0.08 0.04 0.06 0.10 inl (lsb) +125c +25c ?40c r aw = 20k? 08077-016 figure 19 . r - inl in normal mode vs. code vs. tem perature (ad5271) code (decimal) 0 64 128 192 255 ? 0.03 ? 0.02 ? 0.01 0.02 0 0.01 0.03 dnl (lsb) +125c +25c ?40c r aw = 20k? 08077-017 figure 20 . r - dnl in normal mode vs. code vs. temperature (ad5271) ?500 ?400 ?300 ?200 ?100 0 100 200 300 400 500 current (na) temperature ( c ) ?40 ?30 ?20 ?10 0 20 30 40 50 60 70 80 90 100 110 10 i dd = 5v i ss = 5v i dd = 3v i ss = 3v 08077-018 figure 21 . supply current (i dd , i ss ) vs. temperature code (decimal) 0 64 128 192 255 0.15 0.10 0.05 0 ?0.10 ?0.05 inl (lsb) 20k? 100k? t a = 25c 08077-126 figure 22 . r - inl in normal mode vs. code vs. nominal resistance (ad5271 ) code (decimal) 0 64 128 192 255 0.010 0.008 0.006 0.004 0 ?0.002 0.002 dnl (lsb) 20k? 100k? t a = 25c 08077-027 figure 23 . r - dnl in normal mode vs. code vs. nominal resistance (ad5271) 0 0.2 0.4 0.6 0.8 1.0 current (ma) voltage ( v ) 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 08077-023 figure 24 . supply current i dd vs. digital input voltage
ad5270/ad5271 data sheet rev. f | page 14 of 24 0 5 1 0 15 20 25 30 35 40 45 50 rheostat mode tempco (ppm/c) 0 256 512 768 1023 0 64 128 192 255 ad5270 ad5271 code (decimal) 08077-019 20k? 50k? 100k? v dd /v ss = 5v/0v figure 25 . tempco r wa /t vs. code ? 60 ? 50 ? 40 ? 10 ? 30 ? 20 0 1k 10k 100k 1m 10m gain (db) frequency ( hz ) 0x200 (0x80) 0x100 (0x40) 0x080 (0x20) 0x040 (0x10) 0x020 (0x08) 0x010 (0x04) 0x008 (0x02) 0x004 (0x01) 0x002 0x001 08077-031 ad5270 (ad5271) figure 26 . 20 k? gain vs. code vs. frequency ? 60 ? 50 ? 40 ? 10 ? 30 ? 20 0 1k 10k 100k 1m 10m gain (db) frequency ( hz ) 0x200 (0x80) 0x100 (0x40) 0x080 (0x20) 0x040 (0x10) 0x020 (0x08) 0x010 (0x04) 0x008 (0x02) 0x004 (0x01) 0x002 0x001 ad5270 (ad5271) 08077-032 figure 27 . 50 k? gain vs. code vs. frequency 0 1 2 3 4 5 6 7 theoretical i wa_max (ma) code (decimal) 0 2 5 6 5 1 2 7 6 8 1 0 2 3 0 6 4 1 2 8 1 9 2 2 5 5 a d 5 2 70 a d 5 2 71 v d d / v s s = 5 v / 0 v 20k? 50k? 100k? 08077-028 figure 28 . theoretical maximum current vs. code ? 60 ? 70 ? 50 ? 40 ? 10 ? 30 ? 20 0 1k 10k 100k 1m 10m gain (db) frequency ( hz ) 0x200 (0x80) 0x100 (0x40) 0x080 (0x20) 0x040 (0x10) 0x020 (0x08) 0x010 (0x04) 0x008 (0x02) 0x004 (0x01) 0x002 0x001 ad5270 (ad5271) 08077-041 f igure 29 . 100 k? gain vs. code vs. frequency psrr (db) frequency ( hz ) 100 1k 10k 100k v dd /v ss = 5v/0v code = half scale 0 ?90 ?80 ?70 ?60 ?50 ?40 ?30 ?20 ?10 50k? 100k? 20k? 08077-024 figure 30 . psrr vs. frequency
data sheet ad5270/ad5271 rev. f | page 15 of 24 0 ?20 ?40 ?60 ?100 ?80 100 20k? 50k? 100k? frequency ( hz ) 1k 10k 100k thd + n (db) v dd /v ss = 5v/0v code = half scale noise bw = 22khz v in = 1v rms 08077-025 figure 31 . thd + n vs. frequency 0.03 0.01 0 0.02 ?0.01 ?0.02 ?0.04 ?0.03 ?1 4 9 14 19 time (s) voltage (v) 20k? 50k? 100k? 08077-043 figure 32 . maximum glitch energy 45 35 30 40 25 20 0 15 10 5 2.7 3.2 3.7 4.2 4.7 5.2 20k? 50k? 100k? v dd (v) t a = 25c number of codes (ad5270) number of codes (ad5271) 7.50 8.75 6.25 5.00 3.75 2.50 1.25 0 11.25 10.00 08077-021 figure 33 . maximum code l oss vs. voltage 0 ?20 ?30 ?10 ?40 ?50 ?100 ?60 ?70 ?80 ?90 0.001 0.01 0.1 1 20k? 50k? 100k? voltage (v rms ) thd + n (db) v dd /v ss = 5v/0v code = half scale f in = 1khz noise bw = 22khz 08077-026 figure 34 . thd + n vs. amplitude 0.0010 0.0005 0 ?0.0015 ?0.0005 ?0.0010 0 ?10 10 20 30 40 50 60 time (s) voltage (v) v dd /v ss = 5v/0v i aw = 200a code = half scale 08077-046 figure 35 . digital feedthrough 70 60 50 40 0 30 20 10 ?40 ?20 0 20 40 60 80 100 120 temperature (c) number of codes (ad5271) number of codes (ad5270) 15.0 15.5 12.5 10.0 7.5 5.0 2.5 0 v dd /v ss = 5v/0v 20k? 50k? 100k? 08077-020 figure 36 . maximum code l oss vs. t emperature
ad5270/ad5271 data sheet rev. f | page 16 of 24 4 5 6 7 8 voltage (v) time ( seconds ) 0.07 0.09 0.11 0.13 0.15 0.17 08077-029 figure 37 . v ext_cap waveform while writing fuse 0.006 ?0.002 ?0.001 0 0.001 0.002 0.003 0.004 0.005 0 1000 900 800 700 600 500 400 300 200 100 r aw resistance (%) operation at 150c (hours) v dd /v ss = 5v/0v i aw = 10a code = half scale 08077-038 figure 38 . long - term drift accelerated average by burn - in
data sheet ad5270/ad5271 rev. f | page 17 of 24 test circuits figure 39 to figure 43 define the test conditions used in the specifications section . v ms i w a w dut 08077-033 figure 39 . resistor position nonlinearity error (rheostat operation; r - inl, r - dnl) 08077-034 r wa = v ms i w r w = r wa 2 a w i w dut v ms code = 0x00 figure 40 . wiper resistance v dd i w v ms a w v+ v ms % v dd % v ms v dd v+ = v dd 10% psrr (db) = 20 log pss (%/%) = 08077-035 figure 41 . power supply sensitivity (pss, psrr) v ms a w dut v 1g? 08077-036 figure 42 . gain vs. frequency i cm dut w a nc = no connect gnd +2.75v nc +2.75v ?2.75v ?2.75v gnd gnd 08077-037 figure 43 . common leakage curre nt
ad5270/ad5271 data sheet rev. f | page 18 of 24 theory of operation the ad5270 and ad5271 are designed to operate as true variable resistors for analog signals within the terminal voltage range of v ss < v term < v dd . the rdac register contents deter- mine the resistor wiper position. the rdac register acts as a scratchpad register, which allows unlimited changes of resistance settings. the rdac register can be programmed with any position setting using the spi interface. when a desirable wiper position is found, this value can be stored in a 50-tp memory register. thereafter, the wiper position is always restored to that position for subsequent power-up. the storing of 50-tp data takes approx- imately 350 ms; during this time, the ad5270/ad5271 lock to prevent any changes from taking place. the ad5270/ad5271 also feature a patented 1% end-to-end resistor tolerance. this simplifies precision, rheostat mode, and open-loop applications where knowledge of absolute resistance is critical. serial data interface the ad5270/ad5271 contain a serial interface ( sync , sclk, din , and sdo), which is compatible with spi interface standards, as well as most dsps. this device allows writing of data via the serial interface to every register. shift register for the ad5270/ad5271, the shift register is 16 bits wide, as shown in figure 2. the 16-bit word consists of two unused bits, which should be set to zero, followed by four control bits and 10 rdac data bits (note that for the ad5271 only, the lower two rdac data bits are dont care if the rdac register is read from or written to). data is loaded msb first (bit 15). the four control bits determine the function of the software command as listed in table 11. figure 3 shows a timing diagram of a typical ad5270/ad5271 write sequence. the write sequence begins by bringing the sync line low. the sync pin must be held low until the complete data-word is loaded from the din pin. when sync returns high, the serial data-word is decoded according to the instructions in table 11. the command bits (cx) control the operation of the digital potentiometer. the data bits (dx) are the values that are loaded into the decoded register. the ad5270/ad5271 have an internal counter that counts a multiple of 16 bits (a frame) for proper operation. for example, ad5270/ad5271 each works with a 32-bit word but do not work properly with a 31-bit or 33-bit word. the ad5270/ad5271 do not require a continuous sclk when sync is high. to minimize power consumption in the digital input buffers, operate all serial interface pins close to the v dd supply rails. rdac register the rdac register directly controls the position of the digital rheostat wiper. for example, when the rdac register is loaded with all zeros, the wiper is connected to terminal a of the variable resistor. the rdac register is a standard logic register and there is no restriction on the number of changes allowed. the basic mode of setting the variable resistor wiper position (programming the rdac register) is accomplished by loading the serial data input register with command 1 (see table 11) and with the desired wiper position data. 50-tp memory block the ad5270/ad5271 contain an array of 50-tp programmable memory registers, which allow the wiper position to be pro- grammed up to 50 times. table 13 shows the memory map. when the desired wiper position is determined, the user can load the serial data input register with command 3 (see table 11) which stores the wiper position data in a 50-tp memory register. the first address to be programmed is location 0x01 (see table 13); the ad5270/ad5271 increments the 50-tp memory address for each subsequent program until the memory is full. programming data to 50-tp consumes approximately 4 ma for 55 ms, and takes approximately 350 ms to complete, during which time the shift register locks to prevent any changes from occurring. bit c3 of the control register can be polled to verify that the fuse program command was completed properly. no change in supply voltage is required to program the 50-tp memory; however, a 1 f capacitor on the ext_cap pin is required (see figure 46). prior to 50-tp activation, the ad5270 and the ad5271 preset to midscale on power up. write protection at power-up, the serial data input register write commands for both the rdac register and the 50-tp memory registers are disabled. the rdac write protect bit, c1, of the control register (see table 13 and table 14) is set to 0 by default. this disables any change of the rdac register content regardless of the software commands, except that the rdac register can be refreshed from the 50-tp memory using the software reset, command 4. to enable programming of the rdac register, the write protect bit (bit c1), of the control register must first be programmed by loading the serial data input register with command 7. to enable programming of the 50-tp memory, the program enable bit (bit c0) of the control register, which is set to 0 by default, must first be set to 1.
data sheet ad5270/ad5271 rev. f | page 19 of 24 rdac and 50 - tp read operation a serial data output sdo pin is available for readback of the internal rdac register or 50 - tp memory contents. the contents of the rdac register can be read back through sdo by using command 2 (see table 11 ). data from the rdac register is clocked out of the sdo pin during the last 10 clocks of the next spi operation. it is possible to read back the contents of any of the 50 - tp memory registers through sdo by using command 5. the lower six lsb bits, d0 to d5 of the data byte, select which m emory location is to be read back, as shown in table 13. data from the selected memory location is clocked out of the sdo pin dur ing the next spi operation . a binary encoded version address of the most recently programmed wiper memory location ca n be read back using command 6 ( see table 11 ). this can be used to monitor the spare memory status of the 50 - tp memory block. table 12 provides a s ample listing for the sequence of serial data input (din) words with the serial data output appea r ing at the sdo pin in hexadecimal format for a write and read to both t he rdac register and the 50 - tp memory ( memory loc ation 20) . table 11 . command operation truth table command number command[db13:db10] data[db9:db0] 1 operation c3 c2 c1 c0 d9 d8 d7 d6 d5 d4 d3 d2 d1 d0 0 0 0 0 0 x x x x x x x x x x nop: d o nothing. 1 0 0 0 1 d9 d8 d7 d6 d5 d4 d3 d2 d1 2 d0 2 write contents of serial register data t o rdac. 2 0 0 1 0 x x x x x x x x x x read contents of rdac wiper register. 3 0 0 1 1 x x x x x x x x x x store wiper se tting: s tore rdac setting to 50 - t p. 4 0 1 0 0 x x x x x x x x x x software reset: r efresh rdac with last 50 - tp memory stored value. 5 3 0 1 0 1 x x x x d5 d4 d3 d2 d1 d0 read contents of 50 - tp from sdo output in the next frame. 6 0 1 1 0 x x x x x x x x x x read address of last 50 - tp programmed memory location . 7 4 0 1 1 1 x x x x x x x d2 d1 d0 write contents of serial register data to control regis ter . 8 1 0 0 0 x x x x x x x x x x read contents of control r egister . 9 1 0 0 1 x x x x x x x x x d0 software s hutdown . d0 = 0; normal mode. d0 = 1; device placed in shutdown mode. 1 x is dont care. 2 ad527 1 = dont care. 3 see table 15 for 50- tp memory map. 4 see table 14 for bit details.
ad5270/ad5271 data sheet rev. f | page 20 of 24 shut - d own mode the ad5270/ad52 71 can be shut down by executing the software shut down command, c ommand 9 ( see table 11 ), and setting the lsb to 1 . this feature places the rdac in a zero - power - consumption state where terminal ax is open circuited and the wip er terminal wx remains connected. it is possible to execut e any command from table 11 while the ad5270/ad5271 are in shut down mode. th e parts can be taken out of shut down mode by executing c o mmand 9 and setting the lsb to 0 or by a software reset, command 4 (see table 11). resistor performance mode this mode activates a new, patented 1% end - to - end resistor tolerance that ensures a 1% resistor tolerance error on each code, that is, code = half sca le, r wa = 10 k? 100 ?. s ee table 2 , table 3 , table 5 , and table 6 to verify which codes achieve 1% resistor tolerance . the resistor performance m ode is activated by programming bit c2 of the control register. reset the ad527 0/ad5271 can be reset through software by executing c ommand 4 ( see table 11 ). the reset command loads the rdac r e gister with the contents of the mo st recently programmed 50- tp memory location. the rdac r egister loads with midscale if no 50 - tp memory location has been previously programmed. table 12 . write and read to rdac and 50 - tp m emory din sdo 1 action 0x1c03 0xxxxx enabl e update of the wiper posi tion and the 50- tp memory contents through the digital interface . 0x0500 0x1c03 write 0x100 to the rdac register ; w iper moves to ? full - scale position. 0x0800 0x0500 prepare s data read from rdac r egister. 0x0c00 0x100 stores rd ac register content into the 50- tp memory. a 16- bit word appears out of sdo, where the last 10 - bits contain the contents of the rdac r egister (0x100). 0x1800 0x0c00 prepare s data read of last programmed 50 - tp m emory monitor location . 0x0000 0xxx19 nop i n struction 0 sends a 16- bit w ord out of sdo, where the six lsb s last six bits contain the binary address of the last programmed 50 - tp m emory location, for example, 0x19 (see table 13). 0x1419 0x0000 prepares data read from memory location 0x19. 0x2000 0x 0100 prepare s data read from the control regis ter . sends a 16- bit word out of sdo, where the last 10 - bits contain the contents of memory l ocation 0x19 . 0x0000 0xxxxx nop i nstruction 0 sends a 16- bit word out of sdo, where the last four bits contain the co ntents of the control re gister. if b it c3 = 1, the f use program command successful . 1 x is dont care. table 13 . control register bit map db9 db8 db7 db6 db5 db4 db3 db2 db1 db0 0 0 0 0 0 0 c3 c2 c1 c0 table 14 . control reg ister bit description bit name description c0 50- tp program en able 0 = 50 - tp program disabled (default) 1 = enable device for 50- tp program c1 rdac register write prote ct 0 = wiper position frozen to value in 50- tp memory (default) 1 1 = allow upd ate of wiper position through digital interface c2 r - performance en able 0 = rdac resistor tolerance calibration enabled (default) 1 = rdac resistor tolerance calibration disabled c3 50- t p memory program success bit 0 = fuse program command unsucces sful (default) 1 = fuse program command successful 1 wiper position frozen to the last value programmed in the 50 - tp memory. the wiper is frozen to midscale if the 50 - tp memory has not been prev iously programmed.
data sheet ad5270/ad5271 rev. f | page 21 of 24 table 15. memory map command number data byte[db9:db8] 1 register contents d9 d8 d7 d6 d5 d4 d3 d2 d1 d0 5 x x x 0 0 0 0 0 0 0 reserved x x x 0 0 0 0 0 0 1 1st programmed wiper location (0x01) x x x 0 0 0 0 0 1 0 2nd programmed wiper location (0x02) x x x 0 0 0 0 0 1 1 3rd programmed wiper location (0x03) x x x 0 0 0 0 1 0 0 4th programmed wiper location (0x04) x x x 0 0 0 1 0 1 0 10th programmed wiper location (0xa) x x x 0 0 1 0 1 0 0 20th programmed wiper location (0x14) x x x 0 0 1 1 1 1 0 30th programmed wiper location (0x1e) x x x 0 1 0 1 0 0 0 40th programmed wiper location (0x28) x x x 0 1 1 0 0 1 0 50th programmed wiper location (0x32) 1 x is dont care. sdo pin and daisy-chain operation the serial data output pin (sdo) serves two purposes: it can be used to read the contents of the wiper setting and 50-tp values using command 2 and command 5, respectively (see table 11), or the sdo pin can be used in daisy-chain mode. data is clocked out of sdo on the rising edge of sclk. the sdo pin contains an open-drain n-channel fet that requires a pull-up resistor. to place the pin in high impedance and mini-mize the power dissipation when the pin is used, the 0x8001 data word followed by command 0 should be sent to the part. table 16 provides a sample listing for the sequence of the serial data input (din). daisy chaining minimizes the number of port pins required from the controlling ic. as shown in figure 44, the user must tie the sdo pin of one package to the din pin of the next package. the user may need to increase the clock period because the pull-up resistor and the capacitive loading at the sdo-to- din interface may require additional time delay between subsequent devices. when two ad5270/ad5271 devices are daisy-chained, 32 bits of data are required. the first 16 bits go to u2, and the second 16 bits go to u1. table 16. minimize power dissipation at the sdo pin din sdo 1 action 0xxxxx 0xxxxx last user command sent to the digipot. 0x8001 0xxxxx prepares the sdo pin to be placed in high impedance mode. 0x0000 high impedance the sdo pin is placed in high impedance. 1 x is dont care. keep the sync pin low until all 32 bits are clocked to their respective serial registers. the sync pin is then pulled high to complete the operation. mosi ss sclk sdo sclk din din sdo ad5270/ ad5271 u1 ad5270/ ad5271 u2 sync sclk sync v dd c r p 2.2k ? 08077-006 figure 44. daisy-chain configuration using sdo rdac architecture to achieve optimum performance, analog devices has patented the rdac segmentation architecture for all the digital potentio- meters. in particular, the ad5270/ad5271 employ a three-stage segmentation approach as shown in figure 45.the ad5270/ ad5271 wiper switch is designed with the transmission gate cmos topology. a w 8-/10-bit address decoder r l r l r m r m r w s w r w 08077-007 figure 45. simplified rdac circuit
ad5270/ad5271 data sheet rev. f | page 22 of 24 programming the variable resistor rheostat operation1% resistor tolerance the nominal resistance between terminal w and terminal a, r wa , is 20 k, 50 k, or 100 k and has 1024-/256-tap points accessed by the wiper terminal. the 10-/8-bit data in the rdac latch is decoded to select one of the 1024 or 256 possible wiper settings. the ad5270 and ad5271 contain an internal 1% resistor tolerance calibration feature that can be disabled or enabled, enabled by default, or by programming bit c2 of the control register (see table 13 and table 14). the digitally programmed output resistance between the w terminal and the a terminal, r wa , is calibrated to give a maximum of 1% absolute resistance error over both the full supply and temperature ranges. as a result, the general equations for determining the digitally programmed output resistance between the w terminal and the a terminal are the following: for the ad5270 wa wa r d dr ?? 1024 )( (1) for the ad5271 wa wa r d dr ?? 256 )( (2) where: d is the decimal equivalent of the binary code loaded in the 10-/8-bit rdac register. r wa is the end-to-end resistance. in the zero-scale condition, a finite total wiper resistance of 120 is present. regardless of which setting the part is oper- ating in, take care to limit the current between terminal a to terminal w to the maximum continuous current of 3 ma or a pulse current specified in table 8. otherwise, degradation or possible destruction of the internal switch contact can occur. ext_cap capacitor a 1 f capacitor to v ss must be connected to the ext_cap pin, as shown in figure 46, on power-up and throughout the operation of the ad5270/ad5271. ad5270/ ad5271 50_otp memory block ext_cap c1 1f v ss v ss 08077-008 figure 46. ext_cap hardware setup terminal voltage operating range the positive v dd and negative v ss power supplies of the ad5270/ad5271 define the boundary conditions for proper 2-terminal digital resistor operation. supply signals present on te r m i n a l a a nd te r m i n a l w t h at e x c e e d v dd or v ss are clamped by the internal forward-biased diodes, see figure 47. v ss v dd a w 08077-009 figure 47. maximum terminal voltages set by v dd and v ss the ground pins of the ad5270/ad5271 devices are primarily used as digital ground references. to minimize the digital ground bounce, join the ad5270/ad5271 ground terminal remotely to the common ground. the digital input control signals to the ad5270/ad5271 must be referenced to the device ground pin (gnd), and must satisfy the logic level defined in the specifications section. an internal level shift circuit ensures that the common-mode voltage range of the three terminals extends from v ss to v dd , regardless of the digital input level. power-up sequence because there are diodes to limit the voltage compliance at terminal a and terminal w (see figure 47), it is important to power v dd /v ss first before applying any voltage to terminal a and terminal w; otherwise, the diode is forward-biased such that v dd /v ss are powered unintentionally. the ideal power-up sequence is v ss , gnd, v dd , digital inputs, v a , and v w . the order of powering v a , v w , and the digital inputs is not important as long as they are powered after v dd /v ss . as soon as v dd is powered, the power-on preset activates which first sets the rdac to midscale and then restores the last pro- grammed 50-tp value to the rdac register.
data sheet ad5270/ad5271 rev. f | page 23 of 24 outline dimensions compliant to jedec standards mo-187-ba 091709-a 6 0 0.70 0.55 0.40 5 10 1 6 0.50 bsc 0.30 0.15 1.10 max 3.10 3.00 2.90 coplanarity 0.10 0.23 0.13 3.10 3.00 2.90 5.15 4.90 4.65 pin 1 identifier 15 max 0.95 0.85 0.75 0.15 0.05 figure 48. 10-lead mini small outline package [msop] (rm-10) dimensions shown in millimeters 2.48 2.38 2.23 0.50 0.40 0.30 10 1 6 5 0.30 0.25 0.20 pin 1 index area seating plane 0.80 0.75 0.70 1.74 1.64 1.49 0.20 ref 0.05 max 0.02 nom 0.50 bsc exposed pad 3.10 3.00 sq 2.90 p i n 1 i n d i c a t o r ( r 0 . 1 5 ) for proper connection of the exposed pad, refer to the pin configuration and function descriptions section of this data sheet. coplanarity 0.08 0 2-05-2013-c top view bottom view 0.20 min figure 49. 10-lead frame chip scale package [lfcsp_wd] 3 mm 3 mm body, very thin, dual lead (cp-10-9) dimensions shown in millimeters
ad5270/ad5271 data sheet rev. f | page 24 of 24 ordering guide model 1 r aw (k ? ) resolution temperature range package description package option branding ad5270brmz -20 20 1,024 ?40c to +1 2 5c 10- lead msop rm - 10 d1x ad5270brmz -20 - rl7 20 1,024 ?40c to + 1 2 5c 10- lead msop rm - 10 d1x ad5270brmz -5 0 5 0 1,024 ?40c to +125c 10- lead msop rm - 10 ddp ad5270brmz -50 - rl7 5 0 1,024 ?40c to +125c 10- lead msop rm - 10 ddp ad5270brmz - 100 100 1,024 ?40c to +125c 10- lead msop rm - 10 d1w ad5270brmz - 100- rl7 100 1,024 ?4 0c to +125c 10- lead msop rm - 10 d1w ad5270bcp z -20- rl7 20 1,024 ?40c to +125c 10- lead lfcsp_wd cp -10-9 ddy ad5270bcpz -100 - rl7 100 1,024 ?40c to +125c 10- lead lfcsp_wd cp -10-9 ddx ad5271brmz -20 20 256 ?40c to +125c 10- lead msop rm - 10 de0 ad5271brm z - 20 - rl7 20 256 ?40c to +125c 10 - lead msop rm - 10 de0 ad5271brmz -10 0 100 256 ?40c to +125c 10- lead msop rm - 10 ddz ad5271brmz - 100- rl7 100 256 ?40c to +125c 10- lead msop rm - 10 ddz ad5271bcp z -20- rl7 20 256 ?40c to +125c 10- lead lfcsp_wd cp -10-9 de2 ad5271bcpz -100 - rl7 100 256 ?40c to +125c 10- lead lfcsp_wd cp -10-9 de1 eval - ad5270sdz evaluation board 1 z = rohs compliant part. ? 2009 C 2013 analog devices, inc. all rights reserved. trademarks and registered trademarks are the propert y of their respective owners. d08077 - 0- 3/13(f)

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