standard packaging ? hybrid typical dimensions: 0.139 in x 0.078 in x 0.075 in (3.53 mm x 1.98 mm x 1.91 mm) GS3022 - data sheet cic hybrid block diagram description the GS3022 hybrid contains gennums gk509 class a amplifier and a single input coupling capacitor. the extremely small size of the hybrid allows it to easily fit into many cic and itc applications. block a of the gk509 is a low noise inverting amplifier with an open loop voltage gain of typically 56 db. the closed loop gain is set by the ratio of input resistance to feedback resistance. the output stage is a class a current drive amplifier. the current that flows in the transducer is the ratio of the 30 mv reference voltage to the resistance to ground at pad 1 on the hybrid. with no external r e the trandsducer current is typically 240 m a, which makes it suitable for high impedance receivers. features ? small outline for cic applications ? low input referred noise ? low current class a ? copper conductor output pads 1 4 5 6 3 2 7 v b in 21k out 8 a out a in 8 7 3 v mic r e r e c in 220n gnd r mic - a - b 1 5 4 6 2 GS3022 gk509 all resistors in ohms, all capacitors in farads unless otherwise stated. revision date: may 1998 document no. 521 - 10 - 02 gennum corporation p.o. box 489, stn. a, burlington, ontario, canada l7r 3y3 tel. +1 (905) 632-2996 web site: www.gennum.com e-mail: hipinfo@gennum.com
521 - 10 - 02 2 parameter symbol condition min ty p max units amplifier current i amp 55 100 145 m a transducer current i trans 170 230 290 m a microphone supply voltage (pad 5) v mic - 1.3 - v emitter bias voltage (pad 1) v re 21.5 30 35.5 mv on-chip microphone resistor r mic 345 k w on-chip emitter resistor r e 90 125 160 w voltage gain v gain v in = -70 dbv 56 58 60 db absolute maximum ratings parameter value & units supply voltage 3 v dc power dissipation 25 mw operating temperature -10 to + 40 c storage temperature -20 to +70 c caution class 1 esd sensitivity pad connection electrical characteristics conditions: temperature 25 o c, frequency = 1 khz. a in v mic gnd out r e v b a out in 6 4 3 5 87 2 1 (all conditions and parameters remain as shown in test circuit unless stated in condition column)
521 - 10 - 02 3 1 4 5 3 2 6 21k 8 8 7 3 r e c in 220n r mic v b - a - b gk509 GS3022 1 5 4 6 em3046 ed1915 r vc 15k 2 1 4 5 3 2 7 6 21k 4k7 2.6v 8 8 7 3 r e c in 220n r mic - a - b gk509 GS3022 1 5 4 6 3k9 100k v in 1khz 1.3 vdc v out 2 all resistors in ohms, all capacitors in farads unless otherwise stated. fig. 1 production test circuit all resistors in ohms, all capacitors in farads unless otherwise stated. fig. 2 typical cic hearing instrument application
521 - 10 - 02 4 1 4 5 3 2 6 21k 4k7 8 8 7 r e r vc c in 220n r mic - a - b gk509 1 5 4 6 3k9 v in 1.3 vdc 2.6 vdc v out GS3022 2 3 all resistors in ohms, all capacitors in farads unless otherwise stated. fig. 4 characterization circuit (used to generate typical curves) 6 43 5 8 7 21 battery ed1915 r vc em3046 mic + rec + + fig. 3 typical hearing instrument assembly diagram
521 - 10 - 02 5 5 -5 -15 -25 -35 -45 -55 -65 -75 -85 r vc = 10k r vc = 22k 10 100 1k 10k 100k frequency (hz) frequency (hz) input (dbv) input (dbv) r vc = 100k r vc = 47k -18 -20 -22 -24 -26 -28 -30 -32 -34 -36 20 100 1k 10k 20k -90 -85 -80 -75 -70 -65 -60 -55 -50 fig. 5 input vs output (at 1khz) fig. 6 frequency response (r vc =47k, v in =-70dbv) fig. 7 thd vs input (r vc =47k) fig. 8 open loop frequency response (block a) -140 -120 -100 -80 -60 -40 60 55 50 45 40 35 30 25 20 16 14 12 10 8 6 4 2 0 2k2 1m 10 1m v o 10 output (dbv) outpu (dbv) thd (%) gain (db)
521 - 10 - 02 6 dimensioning units are inches. dimensions shown in parenthesis are in millimetres, converted from inches and include minor round off errors. 1.0000 inches = 25.400mm. dimension 0.005 (+0.13) unless otherwise stated. pad numbers and capacitor numbers for illustration only. smallest pad 0.020 x 0.027 (pad 4). largest pad 0.034 x 0.027 (pad 6). xxxxxx - work order number. this hybrid is designed for point to point manual soldering. fig. 9 hybrid layout and dimensions 0.139 (3.53) 0.085 max (2.16) 0.078 (1.98) 6 4 3 5 87 2 1 xxxxxx document identification: data sheet the product is in production. gennum reserves the right to make changes at any time to improve reliability, function or design, in order to provide the best product possible. gennum corporation assumes no responsibility for the use of any circuits described herein and makes no representations that the y are free from patent infringement. ? copyright march 1994 gennum corporation. all rights reserved. printed in canada. revision notes: updated to data sheet
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