GS3020

DynamEQ® I Dynamic Equalizer GS3020 - DATA SHEET FEATURES • 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 highpass filter with adjustable corner frequency 2:1 compression of high frequencies no external capacitors or resistors required 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 class A power amplifier with receiver bias current adjustment. • 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) VB 5 C7 2µ2 C6 0µ1 100k VREG 10 C1 2µ2 RTH 1 R1 68k CHP 11 C2 IN 9 100k FAST AVERAGE DETECTOR REGULATOR SLOW AVERAGE DETECTOR CURRENT REFERENCE 2:1 COMPRESSION CONTROL RECTIFIER VB 24k 12k -A 3 3n9 -C OUT D 2 11 RE 515 C3 0µ1 MGND 8 R2 50k -B 50k 50k 50k 1k GND 4 C4 0µ1 C5 0µ1 GS3020 7 6 All resistors in ohms, all capacitors in farads unless otherwise stated. Patent Pending. CIN COUT FUNCTIONAL BLOCK DIAGRAM Revision Date: May 1998 Document No. 521 - 05 - 04 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 ABSOLUTE MAXIMUM RATINGS PARAMETER Supply Voltage Power Dissipation Operating Temperature Range Storage Temperature Range VALUE / UNITS 3 VDC 25 mW -10° C to 40° C -20° C to 70° C OUT 3 4 PAD CONNECTION RTH RE 1 2 11 CHP 5 6 7 8 9 10 VREG GND CAUTION CLASS 1 ESD SENSITIVITY VB COUT CIN MGND IN ELECTRICAL CHARACTERISTICS Conditions: Input Level VIN = -97 dBV, Frequency = 5 kHz, Temperature = 25 °C, Supply Voltage V B = 1.3 V PARAMETER Hybrid Current Minimum Voltage Total Harmonic Distortion Input Referred Noise Total System Gain AGC Compression Ratio Threshold Compression Gain Range High Pass Corner Frequency System Gain in Compression OUTPUT STAGE Minimum Transducer Current Maximum Current Sink Output Impedance RE Voltage REGULATOR Regulator Voltage SYMBOL I AMP VB THD IRN AV COMP CONDITIONS VIN = 0V RMS RVC= 15kΩ ; VIN= -40dBV at1kHz NFB 0.2 to 10kHz at 12dB/oct MIN 90 1.1 52.5 TYP 190 0.1 2.5 55.5 MAX 300 1 58.5 UNITS µA V % µVRMS dB VIN= -60dBV & -80dBV, RVC= 15k RVC= 15kΩ ; Note 1 CHP - Not Connected VIN = -80dBV RE - Not Connected 1.74:1 - 1.95:1 -94 28 3.4 47 2.11:1 49 Ratio dBV dB kHz dB ARANGE ƒ HPC A80 I TR I SINK ZOUT VRE VREG 26 45 130 3 20 52 160 6 24 56 190 28 60 µA mA kΩ mV 0.89 0.95 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) Notes: 1. ARANGE = V P3 [VIN = -97dBV] - V P3 [VIN = -20 dBV] + 77dBV 521 - 05 - 04 2 1.3V 5 C7 2µ2 C6 0µ1 100k 10 100k FAST AVERAGE DETECTOR REGULATOR C1 2µ2 SLOW AVERAGE DETECTOR 1 CURRENT REFERENCE R1 68k 2:1 COMPRESSION CONTROL RECTIFIER VB 24k 1.3V 1kΩ 3 CHP 0µ1 11 C2 9 12k -A -C D 3n9 3k9 C3 VIN 8 11 2 R2 50k 0µ1 -B 50k 50k 50k 1k 515 RE 100 4 C5 C4 0µ1 7 6 0µ1 GS3020 RVC All resistors in ohms, all capacitors in farads unless otherwise stated. 100K Fig.1 Production Test Circuit 1.3V 5 C7 2µ2 C6 0µ1 100k 10 100k FAST AVERAGE DETECTOR 1.3V RECTIFIER VB 24k ED1913 or MODEL 2313 3 REGULATOR C1 2µ2 SLOW AVERAGE DETECTOR 1 CURRENT REFERENCE R1 68k 2:1 COMPRESSION CONTROL 11 EK3024 or MODEL 39 C2 9 12k -A -C D 3n9 11 2 C3 0µ1 MGND 8 R2 50k -B 50k 50k 50k 1k 515 RE 100 4 C5 C4 0µ1 0µ1 7 6 GS3020 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. RVC 100k Fig. 2 Example of Hearing Instrument Application 3 521 - 05 - 04 VOLUME CONTROL + EK3024 or MODEL 39 9 8 7 6 5 4 Microphones and receivers shown above are for illustrative purposes only. Manufacturers can design with other appropriate transducers. 10 1 BATTERY ED1913 or MODEL 2313 3 2 1 100Ω C6 0µ1 100k FAST AVERAGE DETECTOR RECTIFIER VB 24k 10 11 Fig. 3 Example of Assembly Diagram 1.3V 5 C7 2µ2 100k REGULATOR C1 2µ2 SLOW AVERAGE DETECTOR RTH=∞ ∞ CHP (Normally not connected) 11 CURRENT REFERENCE R1 68k 2:1 COMPRESSION CONTROL C2 9 12k -A -C D 3n9 3k9 C3 VIN 8 R2 50k 0µ1 -B 50k 50k 50k 4 C5 C4 0µ1 7 6 0µ1 GS3020 All resistors in ohms, all capacitors in farads unless otherwise stated. RVC 15k Fig. 4 Characterization Circuit (used to generate typical curves) 521 - 05 - 04 4 + + MIC REC 2.6V 1k82 3 11 2 1k 515 RE 100 45 V IN=-96dBV 40 35 30 VIN=-88dBV 0 -10 1kHz OUTPUT LEVEL (dBV) VIN=-80dBV -20 2kHz -30 -40 -50 -60 -70 -80 -100 RTH = 0 1kHz 2kHz 5kHz RTH = ∞ 5kHz GAIN (dB) 25 20 15 V IN=-60dBV V IN=-40dBV VIN=-20dBV 10 5 0 20 100 1k 10k 20k -90 -80 -70 -60 -50 -40 -30 -20 -10 FREQUENCY (Hz) INPUT LEVEL (dBV) Fig. 5 Frequency Response for Different Input Levels Fig. 6 I/O Transfer Function for Different Test Frequencies. Shown for Min/Max RTH Resistors Values 45 40 35 RVC=47kΩ 30 VIN = -50dBV RVC=100kΩ 45 40 35 30 RVC=22kΩ VIN=-96dBV CHP=100nF CHP=68nF CHP=33nF CHP=10nF CHP=No Capacitor GAIN (dB) 25 20 15 10 5 0 20 100 1k GAIN (dB) 25 20 15 10 5 RVC=15k Ω V IN=-20dBV 10k 20k 0 20 100 1k 10k 20k FREQUENCY (Hz) FREQUENCY (Hz) Fig. 7 Frequency Response for Different RVC Values Fig. 8 Corner Frequency vs C HP Capacitor Value 0 -10 ƒ = 5kHz 45 40 35 30 RTH = ∞ = 100k Ω = 47k Ω = 22k Ω =0 25 20 15 10 5 0 20 VIN=-96dBV OUTPUT LEVEL (dBV) -20 -40 -50 -60 -70 -80 -100 R TH = 0Ω 22kΩ 47kΩ 100kΩ RTH = ∞ -90 -80 -70 -60 -50 -40 -30 -20 -10 GAIN (dB) -30 100 1k 10k 20k INPUT LEVEL (dBV) FREQUENCY (Hz) Fig. 9 I/O Transfer Function for Different RTH Resistors Fig. 10 Frequency Characteristics for Different RTH Values 5 521 - 05 - 04 10 ƒ = 5kHz No Capacitor 1 THD & NOISE (%) 1 V IN=-40dBV ∆ ƒ=200Hz CHP =0.1 µF IMD (%) 0.1 No Capacitor CHP=0.1µF 0.1 0.01 -90 -80 -70 -60 -50 -40 -30 -20 0.01 1k 10k 100k INPUT LEVEL (dBV) FREQUENCY (Hz) Fig. 11 THD & Noise vs Input Level Fig. 12 Intermodulation Distortion (CCIF) vs Frequency 0.250 (6.35) 0.115 (2.92) GS3020 XXXXXX 0.125 MAX (3.18) 1 C7 2 C1 11 3 4 5 6 7 8 9 10 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. 13 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. REVISION NOTES: Updated to Data sheet 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 December 1993 Gennum Corporation. All rights reserved. Printed in Canada. 521 - 05 - 04 6