features ? designed to drive class d integrated receivers ? handles high input levels (up to 100 mvrms) cleanly ? low thd and imd distortion ? unique twin average detectors ? dual channel signal processing ? adjustable agc threshold levels ? mpo range externally adjustable ? highpass filter with adjustable corner frequency ? 2:1 compression of high frequencies ? no external capacitors or resistors required ? 30% smaller by volume than dynameq ? i (gs3011) standard packaging ? hybrid typical dimensions 0.250 in x 0.115 in x 0.115 in (6.35 mm x 2.92 mm x 2.92 mm) description the dynameq ? i hybrid is a dynamically adaptive loudness growth equalizer. its gain and frequency response is dependent on the user's environment, and is designed for level dependant frequency response providing treble increase at low levels (till). the unique twin averaging detector circuit dramatically reduces pumping effects and is optimized for mild to moderate hearing loss. dynameq ? i has two signal paths for dual channel processing incorporating 4 amplifying stages (a, b, c, d) and the agc processing circuit. stage a is a highpass channel with 2:1 compression, stage b is a wideband unity gain buffer. the sum of the two paths gives a high frequency boost to low level signals, which gradually compresses to a flat response at high input levels. stage c is used for volume control adjustment, while stage d is a fixed gain stage with mpo control designed to drive class d integrated receivers. out 0? 100k - c v b v reg c1 2? 10 regulator slow average detector fast average detector r th current reference 2:1 compression control GS3021 mpo c hp in mgnd c out c in 0? 0? 12k c3 0? c2 3n9 - a - b r1 68k rectifier d r2 50k gnd 50k 2? 100k 50k 50k 48k 48k c6 c7 v b c4 c5 9 1 11 8 4 76 2 3 5 dynameq ? i dynamic equalizer - class d GS3021 - data sheet functional block diagram all resistors in ohms, all capacitors in farads unless otherwise stated. patent pending. revision date: may 1998 document no. 521 - 06 - 03 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 - 06 - 03 2 parameter symbol conditions min typ max units hybrid current i amp v in = 0v rms , r mpo = 50k w 120 230 380 m a minimum voltage v b 1.1 - - v total harmonic distortion thd r vc = 15k w ; v in = -40dbv at1khz - 0.1 1 % input referred noise irn nfb 0.2 to 10khz at 12db/oct - 2.5 - m v rms total system gain a v 45 48 51 db agc compression ratio comp v in = -60dbv and -80dbv 1.74:1 1.95:1 2.11:1 ratio threshold - -94 - dbv compression gain range a range r vc = 10k w ; note 1 26 28 - db high pass corner frequency ? hpc c hp - not connected - 3.4 - khz system gain in compression a 80 v in = -80dbv 38 40 42 db output stage maximum output level mpo v in = -20dbv, r mpo = 0 w -14.3 -12.3 -10.3 dbv mpo range d mpo v in = -20dbv, r mpo = 0 to 50k w 13.8 15.8 17.8 db regulator regulator voltage v reg 0.89 0.94 0.99 v all parameters and switches remain as shown in the test circuit unless otherwise stated in conditions column v px actual voltage measured on the pin at given condition (x is pin number) caution class 1 esd sensitivity absolute maximum ratings parameter value / units supply voltage 3 vdc power dissipation 25 mw operating temperature range -10 c to 40 c storage temperature range -20 c to 70 c pad connection conditions: input level v in = -97dbv, frequency = 5 khz, temperature = 25 c, supply voltage v b = 1.3 v electrical characteristics 1 2 3 4 56789 10 11 c out mgnd r th mpo out chp v reg gnd v b c in in notes: 1. a range = v p3 [v in = -97dbv] - v p3 [v in = -20 dbv] + 77dbv
521 - 06 - 03 3 ek3024 or model 39 0? 2? r vc 100k 1.3v ep3074 1.3v 100k - c c1 2? 10 regulator slow average detector fast average detector current reference 2:1 compression control GS3021 0? 0? 12k c3 0? c2 3n9 - a - b r1 68k rectifier d r2 50k 50k 2? 100k 50k 50k c6 c7 v b c4 c5 9 1 11 8 4 7 2 3 5 6 0? 48k 48k all resistors in ohms, all capacitors in farads unless otherwise stated. fig.1 production test circuit r vc 100k r mpo =0 0? GS3021 1.3v 0? 100k - c c1 2? 10 regulator slow average detector fast average detector current reference 2:1 compression control 0? 0? c4 c5 12k c3 0? c2 3n9 r1 68k rectifier d r2 50k 50k 2? 100k 50k 50k c6 c7 v b 9 1 11 8 4 76 2 3 5 v in 3k9 c hp =0? - b - a 50k 48k 48k all resistors in ohms, all capacitors in farads unless otherwise stated. microphones and receivers shown above are for illustrative purposes only. manufacturers can design with other appropriate transducers. fig. 2 example of hearing instrument application
521 - 06 - 03 4 r vc 15k v in 3k9 chp (normally not connected) 1.3v r th = 0? 100k - c c1 2? 10 regulator slow average detector fast average detector current reference 2:1 compression control GS3021 0? 0? 12k c3 0? c2 3n9 - a - b r1 68k rectifier d r2 50k 50k 2? 100k 50k 50k c6 c7 v b 50k 0? c4 c5 9 1 11 8 4 76 2 3 5 48k 48k volume control battery ep3074 0? r mpo + + + - 1 2 3 4 5 6 7 8 9 10 11 mic rec 2? ek3024 or model 39 all resistors in ohms, all capacitors in farads unless otherwise stated. fig. 4 characterization circuit (used to generate typical curves) microphones and receivers shown above are for illustrative purposes only. manufacturers can design with other appropriate transducers. fig. 3 example of assembly diagram
521 - 06 - 03 5 frequency (hz) fig. 7 frequency response for different r vc values r th = = 100k w = 47k w = 22k w = 0 v in =-96dbv 20 100 1k 10k 20k frequency (hz) fig. 10 frequency characteristics for different r th values v in =-40dbv ? = 5khz 1khz 2khz 5khz 20 100 1k 10k 20k frequency (hz) fig. 5 frequency response for different input levels v in =-60dbv r th = 20 100 1k 10k 20k frequency (hz) fig. 8 corner frequency vs c hp capacitor value v in =-96dbv r th = 0 w 22k w 47k w 100k w r th = 35 30 25 20 15 10 5 0 -5 -10 -15 v in =-20dbv v in =-80dbv v in =-88dbv v in =-96dbv 1khz 2khz 5khz r th = 0 v in = -50dbv r vc =100k w 20 100 1k 10k 20k r vc =47k w r vc =22k w r vc =15k w v in =-70dbv -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 input level (dbv) fig. 6 i/o transfer function for different test frequencies. shown for min/max r th resistors values 30 25 20 15 10 5 0 -5 -10 -15 35 30 25 20 15 10 5 0 -5 -10 -15 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 input level (dbv) fig. 9 i/o transfer function for different r th resistors 35 30 25 20 15 10 5 0 -5 -10 -15 c hp =100nf c hp =68nf c hp =33nf c hp =10nf c hp =no capacitor v in =-20dbv output level (dbv) gain (db) output level (dbv) gain (db) gain (db) gain (db)
521 - 06 - 03 6 1 0.1 1 0.1 10 fig. 12 thd & noise vs input level 1 0.1 fig. 14 intermodulation distortion (ccif) vs level r mpo =0 w r mpo =10k w r mpo =50k w -50 -45 -40 -35 -30 -25 -20 -15 -10 -5 0 input level (dbv) fig. 11 i /o for various r mpo settings no capacitor c hp =0.1 m f -80 -70 -60 -50 -40 -30 -20 input level (dbv) no capacitor c hp =0.1 m f -80 -70 -60 -50 -40 -30 -20 input level (dbv 3k 10k 100k frequency (hz) fig. 15 intermodulation distortion (ccif) vs frequency 100 1k 10k frequency (hz) fig. 13 thd & noise vs frequency c hp =0.1 m f no capacitor ?=1khz v in =-40dbv 10 1 0.1 v in =-40dbv d ?=200hz -12 -14 -16 -18 -20 -22 -24 -26 -28 -30 -32 -34 -36 -38 -40 r mpo =33k w r mpo =22k w ? = 5khz d ?=200hz no capacitor c hp =0.1 m f ? =4khz output (dbv) imd (%) thd & noise (%) imd (%) thd & noise (%)
521 - 06 - 03 7 GS3021 xxxxxx 0.125 max (3.18) c1 c7 1 2 3 4 56789 10 11 0.115 (2.92) 0.250 (6.35) dimension units are in inches. dimensions in parenthesis are in millimetres converted from inches and include minor rounding errors. 1.0000 inches = 25.400 mm. dimension 0.005 (+0.13) unless otherwise stated. pad numbers for illustration purposes only. smallest pad 0.020 x 0.027 (0.51 x 0.69) largest pad 0.025 x 0.041 (0.64 x 1.04) xxxxxx - work order number. this hybrid is designed for point to point manual soldering. fig. 16 hybrid layout & dimensions 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 december 1993 gennum corporation. all rights reserved. printed in canada. revision notes: updated to data sheet
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