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BGC405 high frequency products 1 edition a12, 04/99 type marking ordering code (8-mm taped) pin configuration (circuit diagram) package BGC405 40s q62702-g0091 see below sct598 description the BGC405 is a silicon self biased rf transistor (q1). it offers an adjustable collector current nearly independent from device voltage in the range from 2.0v to 4.5v. additionally a control pin (vc) for switching the device off is provided. the collector current can be adjusted by connecting a resistor (rx) between vcc and vr. self-biased bfp405 l sieget a 25- technology l small sct598-package l control pin for switching the device off l current easy adjustable by an external resistor l voltage independent current (2v C 4.5v) esd : e lectro s tatic d ischarge sensitive device, observe handling precautions! equivalent circuit rfin rfout q1 gnd active bias circuit vb vc vcc vr pin connections, sct598 vr,5 rfout,6 gnd,7 vc, 8 4,vcc 3, vb 2, gnd 1,rfin note: top view vpw05982 7 5 2 3 1 4 6 8
BGC405 high frequency products 2 edition a12, 04/99 maximum ratings parameter symbol unit device current i cc 12 ma device voltage vcc 4.5 v total power dissipation, t s 120c 1) p tot 54 mw control voltage vc vcc+0.5 v input current for pin 1 ir 380 m a junction temperature t j 150 c ambient temperature range t a -65...+150 c storage temperature range t stg -65...+150 c thermal resistance junction-soldering point 1) r th js 530 k/w 1)t s is measured on the ground lead at the soldering point to the pcb . electrical specifications (measured in test fixture applying the circuit specified in figure 1 with rx=82 w ), tc=25c, vcc=3v, i cc 7ma unless noted symbol parameter unit min typ max gp power gain ( s 21 2 ) f=900mhz f=1.8ghz db 19.5 16.5 21 18 nf noise figure (in 50 w system) f=900mhz f=1.8ghz db 1.8 2.0 2.1 2.3 p -1db output power at 1db gain compression f=900mhz (in 50 w system) f=1.8ghz dbm 1 0.5 ip 3 third order intercept point f=900mhz (output, g opt )f=1.8ghz dbm 15 15 rl in input return loss f=900mhz f=1.8ghz db 5 8 rl out output return loss f=900mhz f=1.8ghz db 1.5 3 t on on switching time 3) s 3.7 t off off switching time 3) s 2.5 i leak leakage current in sleep mode a <10 i vcon controll pin (vc) current in active mode 2) a 35 i vcoff controll pin (vc) current in sleep mode 2) na -60 v cmin minimum voltage at vc for sleep mode v v cc - 0.3v v cmax maximum voltage at vc for active mode v 0v+0.3v 2) a positive sign denotes a current flowing form the pin to the external circuit. 3) this values are valid for c2=1nf, c3=100pf and 220pf coupling capacitors at rfin and rfout.
BGC405 high frequency products 3 edition a12, 04/99 power gain versus frequency vcc=3v, icc=5ma gma gms s21 2 db f ghz icc ma gma gms db power gain versus device current vcc=3v s21 2 ? s21 ? 2 versus frequency and temperature vcc=3v, icc=7ma f ghz db j = -40c j = +27 c j = +85 c 28 26 24 22 20 18 16 14 12 10 0.2 0.6 1 1.4 1.8 2.2 2.6 3 gms gma is21i 2 50 45 40 35 30 25 20 15 10 5 0 0.1 1 10 f=1 ghz 2 ghz 3 ghz 4 ghz 5 ghz 6 ghz 30 25 20 15 10 5 0 02 468101214
BGC405 high frequency products 4 edition a12, 04/99 icc ma vcc v device current versus rx and temperature vcc=3v 6 5 4 3 2 1 0 7 8 12 3 device current versus voltage at vc vcc=3v; rx=82 w ma icc rx v vc v w rx=56 w rx=82 w rx=120 w rx=680 w 12 10 8 6 4 2 0 1 234 device current versus device voltage j = -40c j = +27 c j = +85 c 14 6 4 2 0 12 10 8 50 250 450 650 icc ma
BGC405 high frequency products 5 edition a12, 04/99 typical application remarks: 1) to provide low frequency stability c2 should be 10 times c3. 2) be aware that also coupling capacitors determine the switching times. 3) the collector current at q1 can be estimated by ic=0.6v / rx[ w ]. 4) place c2 as close to the device as possible. d1 d2 r1 (47k) q2 r2 (500r) r3 10k r4 (2k7) q1 vc,8 vb,3 gnd,7,2 rfin,1 rfout,6 vr,5 vcc,4 on off c2, 1nf l1,100nh c3, 100pf rx 3v, dc c4,150pf c5,100nf rx = 82ohm for icc=7.2ma figure 1. typical application and internal circuit
BGC405 high frequency products 6 edition a12, 04/99 layout proposal part list for vcc=3v, i cc 7ma component value comment l1 100nh rfc c2 1nf compensation capacitor for low frequency stabilization c3 100pf rfc c4 150pf blocking capacitor c5 100nf blocking capacitor c6 220pf coupling capacitor c7 220pf coupling capacitor rx 82 w current adjust substrate h=0.5mm fr4, e r =4.5 BGC405 this proposal demonstrates how to use the BGC405 as a self-biased transistor . as for a discrete transistor matching circuits have to be applied. a good starting point for various applications are the application notes provided for the bfp405. lq 9f 9 %*& c2 c4 c5 rx l1 c7 c6 c3 BGC405 figure 2. layout proposal
BGC405 high frequency products 7 edition a12, 04/99 spice model the following spice listing describes the circuit shown in figure 3. it is valid for low frequencies. for frequencies above 100mhz the parasitic circuit elements noted in figure 4 and table 1 should be added. * preliminary spice model for BGC405 * siemens high frequency products * small scale mmic design group .param r=82 ** analysis setup ** *.tran 2ns 15u 0 2n .temp +27 -40 +85 .dc lin v1 0v 4v 0.1v *.dc lin v2 0v 3v 0.1v *.step param r list 33 47 68 100 150 * voltage supply v1 vcc 0 dc 3.0v v2 vc 0 dc 0.0v *vpul vc 0 pulse(0 3v 100ns 0 0 9us 1000m) x3 x4 r1 x2 r2 r3 r4 q1 vc,4 vb gnd rfin rfout vr vcc c2 l1 c3 rx v1 vin 2 c6 rin c7 3 v2 rout figure. 3: circuit used in the spice file
BGC405 high frequency products 8 edition a12, 04/99 * internal resistors r1 3 vc 47k tc=-0.0006,0.0000025 r2 vr 2 500 tc=-0.0006,0.0 r3 vb 0 10k tc=-0.0006,0.0000025 r4 vb rfin 2.7k tc=-0.0006,0.0 * external resistors rx vcc vr {r} tc=+0.000050,0.0 rout vout 0 50 rin vin 0 50 * external capacitors c2 vb 0 1nf c3 vr 0 100pf c7 rfin vin 220pf c6 rfout vout 220pf * inductors (external) l1 vr rfout 100nh * transistors q1 rfout rfin 0 bfp405 x2 2 3 vb 0 8pl18 x3 vcc 5 5 0 2pl18 x4 5 3 3 0 2pl18 .probe .model bfp405 npn( + is = 1.9969e-16 bf = 83.23 nf = 1.0405 + vaf = 39.251 ikf = 0.16493 ise = 1.5761e-14 + ne = 1.7763 br = 10.526 nr = 0.96647 + var = 34.368 ikr = 0.25052 isc = 3.7223e-17 + nc = 1.3152 rb = 15 irb = 0.00021215 + rbm = 1.3491 re = 1.9289 rc = 0.12691 + cje = 3.7265e-15 vje = 0.70367 mje = 0.37747 + tf = 4.5899e-12 xtf = 0.3641 vtf = 0.19762 + itf = 0.0013364 ptf = 0 cjc = 9.6941e-14 + vjc = 0.99532 mjc = 0.48652 xcjc = 0.08161 + tr = 1.4935e-09 cjs= 0 vjs = 0.75 + mjs = 0 xtb = 0 eg = 1.11 + xti = 3 fc = 0.99469) * pnp: pl18 e b c bulk .subckt 8pl18 3 2 1 94 q1 993 2 3 94 tl18 8 q2 94 2 3 94 vsl18 8 q3 94 2 993 94 lsl18 8 rcex 993 1 0.204 .ends .subckt 2pl18 3 2 1 94
BGC405 high frequency products 9 edition a12, 04/99 q1 993 2 3 94 tl18 2 q2 94 2 3 94 vsl18 2 q3 94 2 993 94 lsl18 2 rcex 993 1 0.816 .ends ***** .model tl18 pnp +is = 2.914e-17 nf = 1.000e+00 bf = 4.005e+02 +ne = 1.553e+00 ise = 6.923e-16 nr = 1.000e+00 +br = 2.869e+01 nc = 1.500e+00 isc = 8.190e-15 +vaf = 6.000e+01 ikf = 1.676e-04 var = 2.214e+00 +ikr = 2.474e-05 rb = 6.000e+01 irb = 0.000e+00 +rbm = 4.000e+01 re = 2.597e+00 rc = 4.000e+00 +xtb =-6.000e-01 eg = 1.156e+00 xti = 3.000e+00 +cje = 1.200e-14 vje = 4.900e-01 mje = 1.360e-01 +tf = 7.600e-10 xtf = 2.872e-01 vtf = 1.000e+03 +itf = 1.400e-02 cjc = 4.700e-13 vjc = 7.610e-01 +mjc = 3.760e-01 xcjc = 1.000e+00 tr = 0.000e+00 +cjs = 0.000e+00 vjs = 7.500e-01 mjs = 0.000e+00 +ptf = 0.000e+00 fc = 5.000e-01 ***** .model vsl18 pnp +is = 1.630e-19 nf = 1.000e+00 bf = 1.000e+09 +ne = 1.500e+00 ise = 0.000e+00 nr = 1.000e+00 +br = 1.000e+09 nc = 2.000e+00 isc = 0.000e+00 +vaf = 1.000e+02 ikf = 1.794e-04 var = 1.700e+00 +ikr = 1.000e+00 rb = 0.000e+00 irb = 0.000e+00 +rbm = 0.000e+00 re = 0.000e+00 rc = 0.000e+00 +xtb = 0.000e+00 eg = 1.122e+00 xti = 3.000e+00 +cje = 0.000e+00 vje = 6.800e-01 mje = 3.400e-01 +tf = 2.000e-09 xtf = 0.000e+00 vtf = 1.000e+03 +itf = 1.000e+06 cjc = 1.950e-13 vjc = 5.500e-01 +mjc = 3.770e-01 xcjc = 0.000e+00 tr = 0.000e+00 +cjs = 0.000e+00 vjs = 7.500e-01 mjs = 0.000e+00 +ptf = 0.000e+00 fc = 5.000e-01 ***** .model lsl18 pnp +is = 4.261e-17 nf = 1.000e+00 bf = 1.000e+09 +ne = 1.500e+00 ise = 0.000e+00 nr = 1.000e+00 +br = 1.000e+09 nc = 2.000e+00 isc = 0.000e+00 +vaf = 6.000e+01 ikf = 9.648e-05 var = 1.700e+00 +ikr = 1.000e+00 rb = 0.000e+00 irb = 0.000e+00 +rbm = 0.000e+00 re = 0.000e+00 rc = 0.000e+00 +xtb = 0.000e+00 eg = 1.158e+00 xti = 3.000e+00 +cje = 0.000e+00 vje = 6.800e-01 mje = 3.400e-01 +tf = 1.000e-09 xtf = 0.000e+00 vtf = 1.000e+03 +itf = 1.000e+06 cjc = 0.000e+00 vjc = 4.600e-01 +mjc = 3.000e-01 xcjc = 0.000e+00 tr = 0.000e+00 +cjs = 0.000e+00 vjs = 7.500e-01 mjs = 0.000e+00 +ptf = 0.000e+00 fc = 5.000e-01 ***** .end
BGC405 high frequency products 10 edition a12, 04/99 table 1. parasitic circuit elements for frequencies above 100mhz x3 x4 r1 x2 r2 r3 r4 q1 vc vb gnd rfin rfout vr vcc c2 l1 c3 rx v1 2 3 v2 lp1 lp2 cp1 cp2 lp5 lp3 lp4 lp6 cp3 lp7 figure 4. parasitic circuit elements for frequencies above 100mhz element value lp1 0.58nh lp2 0.56nh lp3 0.23nh lp4 0.05nh lp5 0.53nh lp6 0.47nh lp7 1nh cp1 134ff cp2 136ff cp3 6.9ff
BGC405 high frequency products 11 edition a12, 04/99 package published by infineon technologies ag i gr ., bereichs kommunikation st.-martin-strasse 76, d-81541 mnchen ? infineon technologies ag 1999 all rights reserved. attention please! the information herein is given to describe certain components and shall not be considered as warranted characteristics. terms of delivery and rights to technical change reserved. we hereby disclaim any and all warranties, including but not limited to warranties of non-infringement, regarding circuits, descriptions and charts stated herein. infineon technologies is an approved cecc manufacturer. information for further information on technology, delivery terms and conditions and prices please contact your nearest infineon technologies office in germany or our infineon technologies representatives worldwide (see address list). warnings due to technical requirements components may contain dangerous substances. for information on the types in question please contact your nearest infineon technologies office. infineon technologies components may only be used in life-support devices or systems with the express written approval of infineon technologies, if a failure of such components can reasonably be expected to cause the failure of that life-support device or system, or to affect the safety or effectiveness of that device or system. life support devices or systems are intended to be implanted in the human body, or to support and/or maintain and sustain and/or protect human life. if they fail, it is reasonable to assume that the health of the user or other persons may be endangered.

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