GA3205 GENNUM | Alldatasheet

Document overview

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Technical content

thinSTAX™ PACKAGING Hybrid Typical Dimensions: 0.205 x 0.110 x 0.060in. (5.21 x 2.79 x 1.52mm) PRELIMINARY DATA SHEET BLOCK DIAGRAM

DESCRIPTION

The GA3205 is a multi-memory hybrid that, with the addition of two microphones, can be used to produce a directional response in any hearing aid. The four available memories can be programmed to include any of the 4 modes of operation: 1 mic omnidirectional, 2 mic omnidirectional, directional, and directional equalized. The variable time delay of the circuit gives it the flexibility to offer a wide range of directivity patterns (ie. cardioid to hypercardioid) for microphone port spacings from 6mm to 13mm. Variable low frequency equalization gives the flexibility to trade-off between bass response and noise performance. Calibration software automatically configures the hybrid for the desired directivity pattern and adjusts the gain trim resistors to compensate for micropohone sensitivity mismatches enabling maximum directivity. The GA3205 hybrid code programmed into the GP523 is "2".

FEATURES

  • 4 different modes of operation:
  • directional
  • directional equalized
  • 1 mic omnidirectional
  • 2 mic omnidirectional
  • allows for mic port spacing from 6mm to 13mm
  • calibration software automatically trims out mic sensitivity mismatches
  • variable time delay/directivity pattern
  • 4 memories
  • variable low frequency equalization (0 to 20dB)
  • small package size
  • compatible with all hearing aids Revision Date: September 1999 FRONT MIC REAR MIC GND1 GND2 OUT VB 100n 200n 200n 10k 15k5 3k9 GA3205 10k 15k5 460k 36k 92k 185k 185k 4n4 18k 184k 1n2 R2 45k5 92K 16k 11k25k6k 26k 26k 24k SW GP523 810 100n VREG1 VREG2 SDA MS All resistors in ohms, all capacitors in farads unless otherwise stated. 2511 REGULATOR Document No. 522 - 18 - 01 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 GA3205 FRONT W AVE ™ Multi-Microphone Hybrid - GA3205

Operating Temperature -10 to + 40 °C Storage Temperature -20 to +70 °C PAD CONNECTION

ELECTRICAL CHARACTERISTICS

Conditions: Temperature 25 oC, Frequency = 1 kHz. R1 - Tap 15; R2 - Tap 15; R3 - Tap 0; R4 - Tap 0; R5 - Tap 0; R6 - Tap 0; R7 - Tap 3; R8 - Tap 14 (All conditions and parameters remain as shown in test circuit unless stated in condition column) RETEMARAPL OBMYSS NOITIDNOCN IMP YTX AMS TINU tnerruCdirbyH I PMA 0410 520 04A µ egatloVmuminiMV B -1 .1- V egatloVrotalugeRV GER 0680 290 89V m niaGmetsySlanimoNN IAG -0-B d tsooBycneuqerFwoLmumixaMz H001@8 10 22 2B d egnaRtnemtsujdAniaGlennahCtnorF ΔG TNORF -8-B d egnaRtnemtsujdAniaGlennahCraeR ΔG RAER -2 2- B d yaleDemiTmuminiM t NIM 0paT-2R5 .42 .70 1s µ yaleDemiTmumixaM t XAM 51paT-4R,0paT-2R5 20 .335 4s µ metsySfooitaRnoitcejeRylppuSrewoPR RSP SYS -0 5- B d rotalugeRfooitaRnoitcejeRylppuSrewoPR RSP GER -0 7- B d noitrotsiDcinomraHlatoTD HT- 1 .00 .1% esioNderrefeRtupnIN RI3 1paT-7R,desolc=WS- 5 .3- V µ enatsiseRtuptuOR PO -9 .3- k Ω 12345 7 89 10 11 1213 GND2 GND1 FRONT MIC REAR MIC VBOUTVREG2 VREG1MS SDA CAUTION ELECTROSTATIC SENSITIVE DEVICES DO NOT OPEN PACKAGES OR HANDLE EXCEPT AT A STATIC-FREE WORKSTATION

SDA MS All resistors in ohms, all capacitors in farads unless otherwise stated. 2511 REGULATOR Fig. 1 Production Test Circuit Fig. 2 Typical Hearing Instrument Application 3k9 3k9 GND1 GND2 200n 10k VOUT FRONT MIC REAR MIC VB 100n 200n 200n 10k 15k5 3k9 GA3205 10k 15k5 460k 36k 92k 185k 185k 4n4 18k 184k 1n2 R2 45k5 92K 16k 11k25k6k 26k 26k 24k SW GP523 810 100n VREG1 VREG2 SDA MS All resistors in ohms, all capacitors in farads unless otherwise stated. 2511 REGULATOR

Fig. 4 Characterization Circuit (used to generate typical curves) Fig. 3 Typical Hearing Instrument Assembly Diagram 3k9 3k9 GND1 10µ 10k VOUT VB FRONT MIC REAR MIC GND2 100n 200n 200n 10k 15k5 3k9 GA3205 10k 15k5 460k 36k 92k 185k 185k 4n4 18k 184k 1n2 R2 45k5 92K 16k 11k25k6k 26k 26k 24k SW GP523 810 100n VREG1 VREG2 SDA MS All resistors in ohms, all capacitors in farads unless otherwise stated. 2511 REGULATOR 12345 789 1 0 1 1 BATTERY FRONT MIC REAR MIC Any AC-Coupled Amplifier or Signal Processor To Programmer Box R1 - Tap 15 R5 - Tap 0 R2 - Tap 15 R6 - Tap 0 R3 - Tap 0 R7 - Tap 3 R4 - Tap 0 R8 - Tap 14

Fig. 5 Frequency Response for Different R6 Tap Settings (Front Channel) Fig. 6 Stage C Time Delay Adjustment Fig. 7 Frequency Response (Rear Channel) Fig. 8 I/O Transfer Function for Front and Rear Channels Fig. 9 THD and Noise vs Frequency Fig. 10 THD and Noise vs Input Level FREQUENCY (Hz) GAIN (dB) R6 - Tap 15 R6 - Tap 0 -10 20 100 1k 10k 20k VIN = -40 dBV R4 RESISTOR TAPS DELAY OF STAGE C (µs) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 R8 - Tap 0 R8 - Tap 14 R8 - Tap 24 R3 & R4 - Tap 0 R3 & R4 - Tap 15 VIN = -40 dBV -15 -10 100 1k 10k FREQUENCY (Hz) GAIN (dB) FRONT CHANNEL: R7 - Tap 0 R7 - Tap 24 REAR CHANNEL: R8 - Tap 0 R8 - Tap 24 f = 1 kHz -100 -90 -80 -70 -60 -50 -40 -30 -20 INPUT LEVEL (dBV) -90 -80 -70 -60 -50 -40 -30 -20 OUTPUT LEVEL (dBV) FRONT CHANNEL REAR CHANNEL VIN = -40 dBV 0.01 0.1 THD & NOISE (%) 100 1k 10k FREQUENCY (Hz) f = 1 kHz FRONT CHANNEL REAR CHANNEL 0.01 0.1 THD & NOISE (%) INPUT LEVEL (dBV) TYPICAL PERFORMANCE CURVES

Dimensions are in inches. Dimensions in parenthesis are in millimetres, converted from inches and include minor rounding errors. 1.0000 inches = 25.400mm. Dimension tolerances ± 0.003 (± 0.08) unless otherwise stated. Smallest pad 0.026 x 0.035 (pad 1). Largest pad 0.025 x 0.053 (pad 2). XXXXXX - work order number. This hybrid is designed for either point-to-point manual soldering or it can be reflowed according to Gennum's recommended reflow process (Information Note 521-45). Gennum Corporation assumes no responsibility for the use of any circuits described herein and makes no representations that they are free from patent infringement. © Copyright April 1999 Gennum Corporation. All rights reserved. Printed in Canada. REVISION NOTES: Cosmetic changes. thinSTAX™ notation added. Change to max. supply voltage. 0.205 (5.21)

0.065 MAX

(1.65) 0.110 (2.79) GA3205 XXXXXX 3 4 5 7891011 12 13 PACKAGE DIMENSIONS DOCUMENT IDENTIFICATION: PRELIMINARY DATA SHEET The product is in a preproduction phase and specifications are subject to change without notice. GENNUM CORPORATION MAILING ADDRESS: P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3 Tel. +1 (905) 632-2996 Fax +1 (905) 632-2814 SHIPPING ADDRESS:

970 Fraser Drive, Burlington, Ontario, Canada L7L 5P5

C-101, Miyamae Village, 2-10-42 Miyamae, Suginami-ku, Tokyo 168-0081, Japan Tel. +81 (3) 3334-7700 Fax: +81 (3) 3247-8839