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GA3222 AdvantaADROTM-Enabled System
GA3222 Preliminary Data Sheet Features ADROamplification technology adaptive directional microphone system adaptive feedback canceller noise management available optional turn-key software high fidelity audio CODEC 20-bit audio precision 95dB input dynamic range with HRXHeadroom Extension drives zero-bias 2-terminal receivers analog inputs fully configurable memories with audible memory change indicator memory select pads volume control with configurable adjustment range 8kHz bandwidth optimized programming speed thinSTAX® packaging Description Advantais Gennum's premium high-end product with ADRO technology from Dynamic Hearing implemented Voyageurplatform. flexibility sophistication ADRO combines with precision advanced capabilities Voyageur deliver unprecedented sound quality, comfort audibility hearing wearers. ADRO fitted direct in-situ measures ensure fast, customised fitting. ADRO uses statistical analysis gain customized independent channels, that sound level always optimized within comfortable dynamic range listener. Advanta's adaptive directional microphone technology provides added benefit background noise. Advanta automatically changes from directional omni-directional different environments needed. Advanta adjustable threshold criterion becomes omni-directional wind noise, quiet. directional mode, signals from omni-directional microphones combined null automatically moved optimise noise rejection. adaptive directional microphone features flat frequency response, that additional frequency compensation required. easily configured different microphone placements, calibrated match multiple microphones. advanced feedback canceller provides increased maximum stable gain. Additionally, features rapid adjustment dynamic feedback situations. Advanta available with Configurefitting software, named allows customer quickly configure hearing aid. Configure features stand-alone database supporting multiple sessions, automatic interface detection intuitive fitting procedure which achieves fast accurate fittings. software interface library customers wishing integrate support Advanta into existing fitting software also available. Other configurable options Advanta include: fixed directional microphone, internal noise reduction with user programmable settings, direct audio input, telecoil input, calibration test modes supporting standard IEC/ANSI procedures, adjustable input selection, four listening programs.
thinSTAX Packaging Hybrid typical dimensions: 0.215 0.124 0.065in 5.46 3.15 1.65mm
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www.gennum.com
GA3222 Preliminary Data Sheet
Block Diagram
CIRCUITRY
VREG
VOLTAGE REGULATOR
MEMORY SELECT CROSS FADER
PEAK CLIPPER
CONFIGURABLE RANGE
HBRIDGE
OUTOUT+
FMIC RMIC
ADAPTIVE FIXED DIRECTIONAL MICROPHONE MICROPHONE COMPENSATION MIXED MODE FEEDBACK CANCELLER
PGND AGCO VOLUME CONTROL CONTROL TONE GENERATOR
INTERNAL NOISE REDUCTION MGND FREQUENCY BAND ANALYSIS PROGRAMMING INTERFACE Channels
IN-SITU MEASURES/ NOISE GENERATOR
FREQUENCY BAND SYNTHESIS ADRO Amplification Technology EEPROM
CLOCK GENERATOR
Hybrid block diagram
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GA3222 Preliminary Data Sheet
Contents
Features thinSTAX Packaging Description Connection.4 Absolute Maximum Ratings Warnings Electrical Characteristics Typical Applications Advanta Overview Functional Block Description ADRO Processing Adaptive Directional Microphone 7.2.1 Threshold Criterion Noise Reduction 7.3.1 Expansion Threshold 7.3.2 Expansion Ratio.10 7.3.3 Time Constants.11 Adaptive Feedback Canceller Converters Head Room Expander Volume Control Memory Select Switches 7.8.1 Momentary Switch MS.13 7.8.2 Momentary Switch Static Switch (jump last memory) 7.8.3 Static Switch 7.8.4 Static Switch Static Switch (jump last memory) Audible Memory Change Indicator 7.10 Cross Fader 7.11 Communication 7.12 Power Management 7.13 Power-On/Power-Off Behavior Battery Indicator 7.14 Telecoil Path Software Support ADROCOM Advanta CalConfig Configure.18 Package Dimensions Location Revision History
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GA3222 Preliminary Data Sheet
Connection
PGND OUT+ RMIC FMIC
OUT-
MGND
VREG
Figure 1-1: Connection
Absolute Maximum Ratings
Parameter
Operating Temperature Range Storage Temperature Range Maximum Operating Supply Voltage Absolute Maximum Supply Voltage
Value
40°C -20°C 70°C 1.5VDC 2VDC
Warnings
CAUTION
LEVEL MOISTURE SENSITIVE DEVICES OPEN PACKAGES EXCEPT UNDER CONTROLLED CONDITIONS
CAUTION
ELECTROSTATIC SENSITIVE DEVICES OPEN PACKAGES HANDLE EXCEPT STATIC-FREE WORKSTATION
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GA3222 Preliminary Data Sheet
Electrical Characteristics
Table 4-1: Electrical Characteristics
Conditions: VBAT 1.25V Temperature 25°C
Parameter
Minimum Operating Supply Voltage Supply Voltage Turn Threshold EEPROM Burn Cycles Current Consuption
Symbol
VBOFF VBON
Conditions
Ramp down Ramp ADRO-only (single mic) features enabled (dual mic) 16kHz sampling rate -40dBV -15dBV,
0.93 1.06 100k 1.945
0.95 2.048
0.97 1.16 2.151
Units
cycles
Frequency System Bandwidth High Frequency System Bandwidth Total Harmonic Distortion Maximum Input Clock Frequency
THDM fclk
Regulator
Regulator Voltage VREG 0.87 0.90 0.93
Input
Input Referred Noise Input Impedance Anti-aliasing Filter Rejection Maximum Input Level Input Dynamic Range Dynamic Range Bandwidth 100Hz 8KHz 8kHz, -40dBV Bandwidth 100Hz 8KHz Bandwidth 100Hz 8KHz -109 -106
Output
Dynamic Range Output Impedance ZOUT
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GA3222 Preliminary Data Sheet
Table 4-1: Electrical Characteristics (Continued)
Conditions: VBAT 1.25V Temperature 25°C
Parameter Volume Control
Volume Control Resistance Volume Control Range
Symbol
Conditions
Units
Three-terminal connection Adjustable range from +/-18 Supports non-symmetrical ranges.
1000
Input
Logic Voltage Logic Voltage
Output
Standby Pull Current Sync Pull Current Logic Current (Pull Down) Logic Current (Pull Synchronization Time (Synchronization Pulse Width) TSYNC TSYNC TSYNC TSYNC TSYNC TSYNC TSYNC TSYNC Baud Baud Baud Baud Baud Baud Baud Baud 29.76 14.88 7.44 3.72 1.86 62.5 31.25 15.63 7.81 3.91 1.95 32.81 16.41 8.20 4.10 2.05
Inputs
Pull Down Resistance Logic Voltage Rising Edge Threshold Falling Edge Threshold Hysteresis VREG 0.25 0.69 0.45 0.24
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GA3222 Preliminary Data Sheet
Typical Applications
resistors ohms, capacitors farads unless otherwise stated.
CIRCUITRY
VOLTAGE REGULATOR
MEMORY SELECT CROSS FADER
PEAK CLIPPER
CONFIGURABLE RANGE
HBRIDGE
FILTER
ADAPTIVE FIXED DIRECTIONAL MICROPHONE MICROPHONE COMPENSATION MIXED MODE FEEDBACK CANCELLER
AGCO VOLUME CONTROL CONTROL TONE GENERATOR
INTERNAL NOISE REDUCTION FREQUENCY BAND ANALYSIS PROGRAMMING INTERFACE Channels
IN-SITU MEASURES/ NOISE GENERATOR
200k
FREQUENCY BAND SYNTHESIS ADRO Amplification Technology EEPROM
CLOCK GENERATOR
Figure 5-1: Test Circuit
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February 2006
GA3222 Preliminary Data Sheet
CIRCUITRY
VOLTAGE REGULATOR
MEMORY SELECT CROSS FADER
PEAK CLIPPER
CONFIGURABLE RANGE
HBRIDGE
Knowles Sonion zero-bias receiver
ADAPTIVE FIXED DIRECTIONAL MICROPHONE MICROPHONE COMPENSATION MIXED MODE FEEDBACK CANCELLER
AGCO VOLUME CONTROL CONTROL TONE GENERATOR
VREG
INTERNAL NOISE REDUCTION
Knowles Sonion microphones
IN-SITU MEASURES/ NOISE GENERATOR
FREQUENCY BAND ANALYSIS PROGRAMMING INTERFACE
Channels
FREQUENCY BAND SYNTHESIS ADRO Amplification Technology EEPROM
CLOCK GENERATOR
Figure 5-2: Typical Application Circuit
Back View CS44 Socket
Rear Zero Biased Receiver Front
switch (N.O.) T-coil
Figure 5-3: Typical Hearing Instrument Assembly Diagram
34477 February 2006
GA3222 Preliminary Data Sheet
Advanta Overview
Advanta system with adaptive algorithms ADRO sound processing methodology implemented Voyageur hardware platform. This hardware platform combination core high fidelity audio CODEC. well, thinSTAX packaging provides easy integration into wide range applications from BTE. CODEC converts analog audio into digital samples DSP, outputs processed samples receiver. CODEC also implements cross fading between audio paths. core implements adaptive algorithms, ADRO processing, volume control, tone generation. adaptive algorithms include adaptive directional microphone feedback cancellation. Internal noise reduction also included. processing based ADRO targets, which eliminates need filters wide band gain settings.
Functional Block Description
ADRO Processing
ADRO uses advanced statistical analysis fuzzy logic control narrow frequency channels achieve natural sound, with maximum listening comfort audibility environments. Instead compressing signal, most informative part dynamic range selected presented linearly every channels. linear processing ADRO results natural sound that preferred first-time experienced hearing users alike. ADRO easy flexible enough hearing loss taking individual preferences into account. There need consider compression ratios, knee-points, other complex settings intuitive adjustments fine tune ADRO overcome hearing problem. Once fitted well environment, ADRO automatically adjusts other. Clinical trials show substantial benefits background noise, with loud, average soft speech quiet wide variety environmental sounds.*Blamey Martin Fiket (2004). digital processing strategy optimize hearing outputs directly. Acad Audiol. (2004 Nov-Dec; 15(10):716-28)
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GA3222 Preliminary Data Sheet
Adaptive Directional Microphone
Adaptive directional microphones offer flexibility over fixed directional microphones noise from direction optimally rejected. architecture this particular adaptive directional microphone combines input from microphones achieve desired response. inherently flat frequency response adaptive directional microphone eliminates need separate frequency compensation algorithm. adjustable threshold criterion also allows Adaptive Directional Microphone automatically adapt omni-directional response when environment relatively quiet. situations where directional response noisy (e.g. wind) omni-directional response also automatically used. case diffuse sound field, adaptive directional microphone adapts super-cardioid polar pattern, which optimal this situation.
7.2.1 Threshold Criterion
recommended threshold adaptive directional microphone 65-70dBSPL. This threshold ensures that quiet environments omni-directional response adopted, that moderately noisy environment appropriate directional response used.
Noise Reduction
internal noise reduction system single-channel expansion scheme operating reduce broad-band noise generated internally hearing particularly microphone. intensity both noise signal after front microphone pre-amp shaped with approximately A-weighted filter designed more accurately reflect sensitivity human ear. This weighting means that threshold fairly constant sensation level across frequency, opposed constant intensity. aggressiveness noise reduction algorithm adjustable.
7.3.1 Expansion Threshold
Test measures show that speech intelligibility index soft speech (55dBSPL LTASS) compromised with expansion threshold dBSPL. recommended expansion threshold setting fixed directional microphone dBSPL
7.3.2 Expansion Ratio
recommended expansion ratio minimize audible effect when hearing moves expansion. Ratios less than recommended.
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GA3222 Preliminary Data Sheet
7.3.3 Time Constants
preconfigured attack release times 200ms 20ms respectively main reasons: ensure that noise reduction system activated during softer phonemes speech (slower expansion attack time) that system quickly responds onset speech (faster expansion release time). typical duration phonemic gaps between syllables speech about 150ms, expansion attack time should longer than this avoid distorting speech envelope. Slow time constants keeping with ADRO processing optimized preserve sound quality speech.
Adaptive Feedback Canceller
Advanta's feedback canceller reduces acoustic feedback forming estimate hearing feedback signal then subtracting this estimate from hearing input. Therefore, forward path hearing affected. Unlike adaptive notch filter approaches, Advanta's feedback canceller does reduce hearing aid's gain.
Feedback path
Estimated feedback
Figure 7-1: Adaptive Feedback Canceller block diagram
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GA3222 Preliminary Data Sheet
Converters
system's converters 2nd-order sigma-delta modulators, which operate 2.048MHz sample rate. system's audio inputs pre-conditioned with antialias filtering programmable gain pre-amplifiers. These analog outputs over sampled modulated produce two, 1-bit pulse density modulated (PDM) data streams. digital data then decimated down pulse-code modulated (PCM) digital words system sampling rate 16kHz. comprised digital, 3rd-order sigma-delta modulator H-bridge. modulator accepts audio data from path converts into 32-times over-sampled, 1-bit data stream, which then supplied H-bridge. H-bridge specialized CMOS output driver used convert 1-bit data stream into differential output voltage waveform suitable driving low-impedance zero-biased hearing receivers.
Head Room Expander
Advanta enhanced Head Room Expander (HRX) circuit, which increases input dynamic range Advanta without audible artifacts. This accomplished dynamically adjusting pre-amplifier's gain post-A/D attenuation depending input level.
Volume Control
external 3-terminal volume control connected Advanta. volume control range adjustable from +/-18dB, with support non-symmetrical configurations (e.g. from -5dB +10dB).
Memory Select Switches
There two, two-pole Memory Select switches available Advanta, which allows user significant flexibility switching between configurations. These switches either momentary static configurable either pull-up pull-down. four user memories configured Advanta.
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GA3222 Preliminary Data Sheet
7.8.1 Momentary Switch
This mode uses single momentary switch (Pin change memories. Using this mode causes part start Memory whenever button pressed next valid memory loaded. When user last valid memory, button press causes memory loaded. Examples valid memories ABCDABCD. valid memories ABCABCA. valid memories ABABA. valid memory AAA.
7.8.2 Momentary Switch Static Switch (jump last memory)
This mode uses static switch (Pin momentary switch (Pin change memories. static switch OPEN, part starts memory behaves like momentary with exception that memory used. static switch HIGH, part will automatically jump memory (this happens start-up during normal operation). this setup, momentary switch's state ignored, preventing memory select beeps from occurring. When OPEN, part loads last selected memory. required, memory other than used jump memory (including accessible MS). Examples OPEN there valid memories: ABCABCA. HIGH:
7.8.3 Static Switch
This mode uses static switches change memories. Table describes which memory selected depending state switches. this mode possible jump from memory other memory simply changing state both switches. both switches changed simultaneously then transition smooth, otherwise, switch changed then other, part transitions intermediate memory before reaching final memory. part starts whatever memory switches selected. memory invalid part defaults memory
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GA3222 Preliminary Data Sheet
Table 7-1: Memory selected Static Switch mode
OPEN HIGH OPEN HIGH
OPEN OPEN HIGH HIGH
Memory
valid, otherwise valid, otherwise valid, otherwise
7.8.4 Static Switch Static Switch (jump last memory)
This mode uses static switches change memories. Unlike previous example, this mode switches memory when static switch HIGH. This means that this mode uses maximum three memories (even four valid memories programmed). Table describes which memory selected depending state switches.
Table 7-2: Memory selected Static Switch Static Switch (jump last memory) mode
OPEN HIGH OPEN HIGH
OPEN OPEN HIGH HIGH
Memory
valid, otherwise
this mode possible jump from memory other memory simply changing state both switches. both switches changed simultaneously then transition smooth, otherwise, switch changed then other, part transitions intermediate memory before reaching final memory. When HIGH, state switch ignored. This prevents memory select beeps from occurring when switching when HIGH. part starts whatever memory switches selected. memory invalid, part defaults memory required, memory other than used jump memory (including accessible MS).
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GA3222 Preliminary Data Sheet
Audible Memory Change Indicator
length memory indicator beeps well beep mode (single beep, multi-beep beeps disabled) configurable. addition, each memory have different frequency beep amplitude. Beeps non-masking (they block audio path), masking (the audio path disabled during beeps).
7.10 Cross Fader
minimize potential loud transients when switching between memories, Advanta uses cross fader block. When memory changed, audio signal faded out, after switching next memory, audio signal faded back cross fader also used during programming.
7.11 Communication
Advanta programmed using industry standard programming boxes. During parameter changes main audio signal path hybrid temporarily muted using cross fader avoid generation disturbing audio transients. Once changes complete, main audio path reactivated. changes made during programming lost power-off unless they explicitly burned EEPROM memory.
7.12 Power Management
Advanta designed accommodate high power applications. ripple supply cause instantaneous reduction battery's voltage, potentially disrupting circuit's function. Advanta hybrids have separate power supply ground connections output stage. This allows hearing instrument designers accommodate external filters order minimize ripple from supply line. Reducing this ripple greatly improves stability circuit prevents unwanted reset circuit caused spikes supply line. more information properly designing filter reduce supply ripple, please refer information note Using GB3211 PARAGON Digital High Power Applications Initial Design Tips, document #24561.
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GA3222 Preliminary Data Sheet
7.13 Power-On/Power-Off Behavior Battery Indicator
During power-on, Advanta hybrid held reset state until supply voltage (Vb) reaches turn-on threshold. small portion hybrid's internal control logic turns monitors voltage determine supply stable. Once supply stable, entire hybrid activated loads configuration. Finally, audio output turns smoothly transitioning expected output level. During normal operation, when battery condition (below battery threshold) detected, Advanta hybrid sends series beeps configurable length length) indicate that battery low. This will repeat regular interval (configurable from seconds hours) until device reaches turn-off threshold. battery threshold configurable from between 1.0V 1.2V 10mV increments. drops below turn-off threshold then Advanta hybrid returned reset state audio output muted. After reset battery sudden supply transient, recovery behavior Venture determined selectable reset mode through Calconfig application. There four selectable reset modes follows: Shallow-reset mode, allows Advanta hybrid immediately restart when supply voltage rises above turn-ON threshold, after battery shutdown transient shutdown. device restarts memory that last active when shut down occurred. summary, device functions until supply voltage drops below turn-OFF threshold, recovers when device rises above turn-ON threshold again. Deep-reset mode, does allow Advanta hybrid restart after battery shutdown transient shutdown. Once shut down occurs (i.e. once supply voltage drops below turn-OFF threshold), device remains until supply voltage drops below approximately 0.3V subsequently rises above turn-ON threshold. order supply drop below 0.3V, battery should disconnected. Upon reconnecting battery (preferably battery) supply voltage rises above turn-ON threshold, subject supply being stable, device restarts. Mixed mode, combination modes device starts shallow-reset mode initially, then changes over deep reset mode after five minutes.
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February 2006
GA3222 Preliminary Data Sheet Transient reboot mode (recommended), more advanced combination modes plus some additional intelligence. device starts shallow-reset mode initially, that after battery shutdown transient shutdown, device immediately restarts when supply voltage rises above turn-ON threshold. Once device restarts, deep-reset mode applied device operates memory that last active when shut down occurred. Additionally, maximum output level reduced through reduction AGCo peak clipper. This operating condition defined transient reboot mode. device operates transient reboot mode (meaning deep-reset mode maximum output reduction applied) while monitoring supply voltage. supply voltage remains above turn-on threshold least seconds, device allowed exit transient reboot mode. device returns mode maximum output restored. Generally, battery shutdown transient shutdown that occurs while shallow-reset mode while shallow-reset mode component mixed mode transient reboot mode) results Advanta hybrid restarting into memory that last active when shut down occurred. Advanta hybrid this memory restart capability three memories. restart memory beyond first three memories causes device restart initial memory, similar behavior when battery first connected. transient reboot mode described above also applies three memories. additional memories shallow-reset mode behaviour, restarts initial memory after shutdown.
7.14 Telecoil Path
telecoil input calibrated during Cal/Config process. compensate telecoil/microphone gain mismatch, telecoil gain adjusted match microphone gain.
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GA3222 Preliminary Data Sheet
Software Support
ADROCOM
ADROCOM library provides simple application programmer's interface controlling programming Advanta with proprietary fitting software. ADROCOM library win32 dynamic link library (DLL). ADROCOM library provides functionality required measure audio levels through hearing aid, fine-tune hearing fitting.This library also provides communications interface hearing facilitate lower level functions such connection, device verification, reading writing both volatile non-volatile memory, being able stop, start mute hearing during fitting session.
Advanta CalConfig
ADRO algorithm requires calibration Advanta hearing instrument before using with fitting software. calibration will adjust gain maximum output level instrument gain maximum output frequency response curves flat, within specified tolerance, across frequency spectrum. calibration done Gennum's Advanta CalConfig program. more information Advanta CalConfig Program refer "Getting Started with Advanta Digital" information note, document 36478.
ConfigureConfigure fitting software turn-key ADRO fitting solution Advanta. Configure uses ADROCOM library interface with hearing provide initial fitting predictions. Configure features stand-alone database, which stores each client's demographic details, fitting details enables access past fitting sessions. Configure guides clinician through intuitive fitting procedure which achieves fast effective fittings four steps; balancing comfort levels, adjusting volume hearing aid, fine-tuning hearing aid, programming. Three programs saved hearing when using Configure. clinician able select microphone configuration each memory, well settings feedback cancellation internal noise reduction. Fine-tuning adjustments always made first program automatically incorporated into second third program.
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GA3222 Preliminary Data Sheet
Package Dimensions
0.215 (5.46)
0.124 (3.15)
GA3222 XXXXXX
0.070 (1.78)
0.026 (0.660)
0.016 (0.406)
Dimension units inches. Dimensions parentheses millimetres, converted from inches include minor rounding errors. 1.0000 inches 25.400mm Dimension tolerances: ±0.005 (±0.13) unless otherwise stated. Work order number: XXXXXX This Hybrid designed either point-to-point manual soldering reflow according Gennum's reflow process (Information Note 521-45).
Figure 9-1: Package dimensions
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GA3222 Preliminary Data Sheet
Location
Position
-59.25 -91.5 -124 -154.25 -183.5 -171.25 -182.25 -147 -113.75 -84.5 -56.25 -27.25 -12.75
Dimensions
-5.75 -5.75 -8.5 -5.75 -1.75 -1.75 33.75 66.5 71.5 66.5 73.25 73.25 37.25
Xdim (MIL)
20.5 21.5 41.5 19.5 20.5 18.5 18.5 43.5
Ydim (MIL)
26.5 26.5 26.5 34.5 34.5 16.5 35.5 35.5 16.5
-0.737 -1.505 -2.324 -3.150 -3.918 -4.661 -4.350 -4.629 -3.734 -2.889 -2.146 -1.429 -0.692 0.013 -0.324
-0.146 -0.146 -0.216 -0.146 -0.044 -0.044 0.857 1.689 1.816 1.689 1.930 1.930 1.861 2.007 0.946
Xdim (mm)
0.457 0.508 0.521 0.610 0.483 0.546 0.432 1.054 0.495 0.660 0.521 0.457 0.470 0.470 0.432 1.105
Ydim (mm)
0.965 0.673 0.673 0.533 0.673 0.876 0.876 0.419 0.737 0.991 1.245 0.762 0.762 0.902 0.902 0.419
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GA3222 Preliminary Data Sheet
Revision History
Version
136253 137260 138403
Date
March 2005 October 2005 February 2006
Changes Modifications
document. Updates. Update Preliminary Data Sheet
DOCUMENT IDENTIFICATION
PRELIMINARY DATA SHEET
product preproduction phase specifications subject change without notice.
GENNUM CORPORATION
Mailing Address: P.O. 489, Stn. Burlington, Ontario, Canada Shipping Address: Fraser Drive, Burlington, Ontario, Canada Tel. (905) 632-2996 Fax. (905) 632-5946
GENNUM JAPAN CORPORATION
Shinjuku Green Tower Building 27F, 6-14-1, Nishi Shinjuku, Shinjuku-ku, Tokyo, 160-0023 Japan Tel. (03) 3349-5501, Fax. (03) 3349-5505
GENNUM LIMITED
Long Garden Walk, Farnham, Surrey, England Tel. (0)1252 (0)1252 Gennum Corporation assumes liability errors omissions this document, circuits devices described herein. sale circuit device described herein does imply patent license, Gennum makes representation that circuit device free from patent infringement. GENNUM logo registered trademarks Gennum Corporation. ADROand Configureare trademarks Dynamic Hearing Ltd. Copyright 2005 Gennum Corporation. rights reserved. Printed Canada. www.gennum.com
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