PARAGON DIGITAL™ GA3209-SO2 PAL Configuration PRELIMINARY DATA SHEET DESCRIPTION • 2 channel WDRC processing The GA3209-S02 Product Abstraction Layer™ (PAL) provides an advanced, two channel Wide Dynamic Range Compression (WDRC) DSP system. A highly configurable digital signal processor enables strong fitting versatility with independent channel compression characteristics, including five parameter I/O curve adjustments (one of them calculated) and variable AGC time constants. All programmable parameters, including the crossover frequency, have generous adjustment ranges and excellent resolution. Each channel contains independent AGC control with Gennum's proven Twin Detector approach. • 4 independently configurable Biquad Filters • fully adjustable crossover frequency • AGC Detector in each channel with adjustable time constants (Single or Twin Detector) • flexible WDRC I/O curve adjustment (channel independent) • wideband gain adjustment with external VC option • notch filter (variable center and width) and dynamic depth (gain dependent) • soft squelch (low level expansion) with variable threshold and variable time constants Advanced features include low level expansion, a fully programmable notch filter with optional gain-dependent operation and a pure tone generator enabling in situ audiometry. • telecoil option • AGCO (variable threshold and time constants) • digital peak clipping option • low battery indicator • tone generator (programmable level and frequency) GA3209 provides industry leading performance with an input dynamic range of 95dB, total system time delay of less than 2ms and low current consumption (below 900µA including transducers in most applications). • 4 memories with full configuration storage GA3209 GA3209-S02 CHANNEL PROCESSING 70nF MIC A/D 8 TWIN DETECTORS PRE 1 & 2 BIQUAD FILTERS BAND SPLIT FILTER CHANNEL PROCESSING Σ POST A BIQUAD FILTER TWIN DETECTORS VC 60nF T 10 A/D PEAK CLIPPING NOTCH FILTER 13 OUT+ 1 OUT- TONE GENERATOR TWIN DETECTOR SQUELCH D/A HBRIDGE AGC-O POST B BIQUAD FILTER BLOCK DIAGRAM Doc.No.19176 - 3 [Rev. October 2001] 1 GA3209 FEATURES ELECTRICAL CHARACTERISTICS RANGE PARAMETER MIN MAX 0 -18 UNITS RESOLUTION ACCURACY dB N/A N/A Hz N/A type 1 kHz N/A type 1,2 TELECOIL GA3209 Mic attenuation in MT mode Low Pass compensation Filter 500 FILTER BANKS Crossover Frequency (Ch1/2) 0.300 8 FREQUENCY SHAPING Pre l and Pre 2 Biquad Filter Design Specific N/A type 1,2 Post A and Post B Biquad Filter Design Specific N/A type 1,2 INDEPENDENT CHANNEL PROCESSING Low Level Gain -18 42 dB Table 2 type 3 High Level Gain -18 42 dB Table 2 type 3 Lower Threshold 30 110 dBSPL Table 2 type 3 Upper Threshold 30 110 dBSPL Table 2 type 3 Compression Ratio 1:1 100:1 Ratio Table 1 type 3 AGCi Attack Time Constant (Fast & Slow) 0.25 8192 ms Table 1 type 1,3 AGCi Release Time Constant (Fast & Slow) 0.25 8192 ms Table 1 type 1,3 Wideband System Gain -36 12 dB Table 2 type 3 Wideband Attack Time Constant (Fast & Slow) 0.25 8192 ms Table 1 type 1,3 Wideband Release Time Constant (Fast & Slow) 0.25 8192 ms Table 1 type 1,3 WIDEBAND SYSTEM GAIN Converter Gain See hardware Data Sheet Doc# 14437 External VC -48 0 dB Table 2 type 3 Internal VC Attenuator -48 0 dB Table 2 type 3 -19 83 dB N/A Note 1 -40 0 dBFS* Table 2 type 3 Ratio N/A N/A TOTAL SYSTEM GAIN Total System Gain AGCo AGCo Output Limiting ∞ :1 AGCo Compression Ratio AGCo Attack Time Constant (Fast & Slow) 0.25 8192 ms Table 1 type 1,3 AGCo Release Time Constant (Fast & Slow) 0.25 8192 ms Table 1 type 1,3 * peak output is defined as largest sine wave possible at a the resonant frequency of the receiver 2 19176 - 3 ELECTRICAL CHARACTERISTICS (continued) RANGE PARAMETER MIN MAX -40 0 UNITS RESOLUTION ACCURACY dB Table 2 type 3 ratio N/A N/A dBSPL Table 2 type 3 PEAK CLIPPER PC Output Limiting GA3209 LOW LEVEL EXPANSION (SOFT SQUELCH) Squelch Expansion Ratio 1:2 Squelch Threshold 30 60 Squelch Attack Time Same as Wideband Fast Attack Time Constant Squelch Release Time Same as Wideband Fast Release Time Constant NOTCH FILTER NF Center Frequency 0.8 5 kHz N/A type 1,2 NF Attenuation 0 12 dB Table 1 N/A NF Bandwidth 1/12 1 octave Table 1 N/A Pure Tone Frequency 0.25 16 kHz Table 1 type 1,2 Pure Tone Amplitude -96 0 dBFS Table 2 type 3 TONE GENERATOR NOTE 1: Total System Gain consists of Wideband System Gain + High and Low Independent Channel Gains + Converter Gain and accuracy of this parameter is dependent on accuracy of the components. Accuracy definitions: type 1: accuracy is determined by the clock frequency deviation type 2: accuracy is determined by the quantization error of 16bit coefficient and 20bit or higher data word. type 3: accuracy is determined by the quantization error of a parameter word (see table 2 for word length) and 20bit or higher data word. NOTE 2: Refer to Doc #20143 “PARAGON Digital™ Reference Guide” for parameter description. TABLE 1: Parameter Values Supported by GA3209-S02 PAL Compression Ratio 1 ; 1.016 ; 1.032 ; 1.050 ; 1.067 ; 1.085 ; 1.103 ; 1.123 ; 1.143 ; 1.164 ; 1.185 ; 1.210 ; 1.230 ; 1.255 ; 1.28 ; 1.31 ; 1.33 ; 1.36 ; 1.39 ; 1.42 ; 1.45 ; 1.49 ; 1.52 ; 1.56 ; 1.60 ; 1.64 ; 1.68 ; 1.73 ; 1.78 ; 1.83 ; 1.88 ; 1.94 ; 2.00; 2.06 ; 2.13 ; 2.21 ; 2.29 ; 2.37 ; 2.46 ; 2.56 ; 2.67 ; 2.78 ; 2.90 ; 3.05 ; 3.20; 3.37 ; 3.56 ; 3.76 ; 4.00 ; 4.27 ; 4.57 ; 4.92 ; 5.33 ; 5.82 ; 6.40 ; 7.11 ; 8.00 ; 9.14 ; 10.67 ; 12.80 ; 16.00 ; 21.33 ; 32.00 ; 64.00 ; 100 RATIO Attack and Release Time constant 0.25 ; 0.5 ; 1 ; 2 ; 4 ; 8 ; 16 ; 32 ; 64 ; 128 ; 256 ; 512 ; 1024 ; 2048 ; 4096 ; 8192 ms NF Attenuation 0 ; 6 ; 12 dB NF Bandwidth 1/12 ; 1/6 ; 1/4 ; 1/3 ; 1/2 ; 1 Pure Tone Frequency* 0.250 ; 0.500 ; 0.640 ; 0.800 ; 1.00 ; 1.28 ; 1.60 ; 2.00 ; 3.20 ; 4.00 ; 6.40 ; 8.00 ; 16.00 octave kHz *other frequencies are available with increased harmonics components 3 GENNUM CORPORATION 19176 - 3 GA3209 GA3209-S02 CHANNEL PROCESSING 70nF A/D 8 TWIN DETECTORS 3k9 CHANNEL PROCESSING POST A BIQUAD FILTER NOTCH FILTER TWIN DETECTORS VC 60nF 10 A/D 1k OUT PEAK CLIPPING 13 LP FILTER 1 TONE GENERATOR TWIN DETECTOR SQUELCH D/A HBRIDGE GA3209 PRE 1 & 2 BIQUAD FILTERS BAND SPLIT FILTER Σ AGC-O POST B BIQUAD FILTER Fig. 1 Characterization Circuit CAUTION ELECTROSTATIC SENSITIVE DEVICES REVISION NOTES: Description text from pages 5-7 of the previous version of the Document are transferred to Doc #20143 PARAGON Digital™ Reference Guide. Update to Block Diagram DO NOT OPEN PACKAGES OR HANDLE EXCEPT AT A STATIC-FREE WORKSTATION DOCUMENT IDENTIFICATION PRELIMINARY DATA SHEET The product is in a preproduction phase and specifications are subject to change without notice. For latest product information, visit www.gennum.com GENNUM CORPORATION GENNUM JAPAN CORPORATION MAILING ADDRESS: P.O. Box 489, Stn A, Burlington Ontario, Canada L7R 3Y3 Tel. +1 (905) 632-2996 fax: +1 (905) 632-2814 C-101, Miyamae Village, 2-10-42 Miyamae, Suginami-ku, Tokyo 168-0081, Japan Tel. +81 (3) 3334-7700 Fax: +81 (3) 3247-8839 SHIPPING ADDRESS: 970 Fraser Drive, Burlington, Ontario, Canada L7L 5P5 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 July 2001 Gennum Corporation. All rights reserved. Printed in Canada. 4 19176 - 3