DynamEQ® II WDRC System GS3027/GS3028 - DATA SHEET FEATURES DEVICE DESCRIPTION • dual channel signal processing The DynamEQ® II hybrid family is a second generation Wide Dynamic Range Compression (WDRC) system. • 2nd (4th) order state variable filter GS3027 (GS3028) Hybrid incorporates 12 dB/oct (24 dB/ oct) filtering and is designed to accommodate CIC and ITC size requirements. • adjustable crossover frequency • adjustable compression ratio from 1:1 to 4:1 The gain and frequency response is dependant on the user’s environment. • independent compression ratio adjustment for low and high frequency band Twin averaging detector circuits are optimized for sound quality during normal listening without sacrificing comfort during sudden loud inputs. • adjustable AGC threshold levels • unique twin average detectors All input signals to DynamEQ® II, are processed by 2:1 compression before subsequent band splitting. • handles high input levels The 12 dB/oct (24 dB/oct) band split filter ahead of the expander/compressor circuits allows for independent compression ratio adjustment (1:1 to 4:1) in high and low frequency channels. • low THD and IMD distortion • drives class D Integrated Receivers • MPO range externally adjustable The gain setting stage is followed by a class D Integrated Receiver preamplifier stage. Symmetrical peak clipping is used to achieve MPO adjustment. STANDARD PACKAGING Hybrid Typical Dimensions 0.180 in x 0.110 in x 0.080 in (4.57 mm x 2.79 mm x 2.03 mm) VB 1 CSAD 1:1 2:1 9 13 16 C5 4:1 RHI RLO 11 12 10 10n 1M VREG REGULATOR 8 C1 0µ1 RTH SLOW AVERAGE DETECTOR 1M FAST AVERAGE DETECTOR 1 CONTROL 15 RECTIFIER X 50k VB RAGC_IN 48k RH C2 IN 12 dB / Oct (24 dB / Oct) BAND SPLIT FILTER 10k -A 7 0µ2 C4 High Frequency Expander / Compressor -B 12k 5 14 OUT 0µ1 RL 48k 8k4 Low Frequency Expander / Compressor GND -C 14k 17 MPO C3 GS3027 (GS3028) 0µ1 All resistors in ohms, all capacitors in microfarads, unless otherwise stated Patent Pending Revision Date: May 1998 6 4 3 Rƒc FOUT BIN 2 BOUT FUNCTIONAL BLOCK DIAGRAM Document No. 521 - 34 - 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: [email protected] PAD CONNECTION ABSOLUTE MAXIMUM RATINGS 1:1 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 13 13 OUT 14 RLO RHI 4:1 12 11 10 10 RTH Rth 2:1 2:1 MPO 15 16 16 17 17 CSAD VREG 9 8 77 IN 55 CAUTION CLASS 1 ESD SENSITIVITY ELECTRICAL CHARACTERISTICS 1 2 3 VB BOUT BIN 4 FOUT 66 Rƒc GND Conditions: Supply Voltage VB = 1.3 V, Frequency = 1 kHz, Temperature = 25°C PARAMETER SYMBOL CONDITIONS IAMP Hybrid Current Minimum Voltage MIN - Vb TYP 370 MAX UNITS 530 µA 1.1 - - V Total Harmonic Distortion THD VIN = -40dBV at 1kHz - 0.2 1.0 % THD with Maximum Allowable Input THDM VIN = -23dBV, Rvc = 47kΩ - 2 10 % - 3.0 - µVRMS Input Referred Noise IRN Aweight Total System Gain AV VIN = -90dBV 46 49 52 dB Regulator Voltage VREG ILOAD = 30µA 890 930 1000 mV AGC Lower Threshold THLO -91 -87 -83 dBV Upper Threshold THHI -36 -32 -28 dBV Compression Gain Range ∆A Gain(-90dBVIN) -Gain(-30dBVIN) 37.5 40.5 43.5 dB A60 VIN =-60dBV 26 29 32 dB 0.9 1.0 1.1 Ratio 3.6 4.0 4.3 Ratio System Gain in Compression Min. Compression Ratio CMP1 :1 VIN=3kHz, -60dBV to -40dBV, Rhp=1:1 Rlp=1:1 Max. Comp. Ratio CMP4 :1 VIN =3kHz, -60dBV to -40dBV, Rhp=4:1, Rlp=4:1 Fast Detector Time Constant τFAST - 10 - ms Slow Detector Time Constant τSLOW - 220 - ms 3.9 - kHz FILTER Maximum Cross-over Frequency ƒc_0 Rƒc=0Ω 3.0 Nominal Cross-over Frequency ƒc_22 Rƒc=22kΩ 1.5 1.9 2.3 kHz Minimum Cross-over Frequency ƒc_220 Rƒc=220kΩ - 0.9 1.4 kHz - 12 - dB/oct dB/oct Filter Rolloff Rate (GS3027) (GS3028) STAGE A and B - 24 - - - - Open Loop Gain (B) AOL_B - 52 - dB Input Impedance (A) RIN 9 11 13 kΩ 7 9 11 dB -14.5 -12.5 -10.5 13 15 17 dB - 24 - kΩ OUTPUT STAGE Stage Gain Max Output Level MPO Range Output Resistance AC MPO ∆MPO VIN=-30dBV RVC=220kΩ,VIN=-25dBV RMPO=0Ω to 50kΩ ROUT All conditions and parameters remain as shown in Test Circuit unless otherwise stated in "Conditions" column. 521 - 34 - 03 2 dBV VB 0µ22 1 9 13 C5 10 16 11 12 10n 1M SLOW AVERAGE DETECTOR REGULATOR 8 C1 0µ1 2µ2 1M FAST AVERAGE DETECTOR 1 CONTROL 15 RECTIFIER X R =∞ TH 50k VB RAGC_IN 48k RH C2 3.9k VIN 12 dB / Oct (24 dB / Oct) BAND SPLIT FILTER 10k -A 7 0µ2 C4 High Frequency Expander / Compressor -B 0µ1 RL 48k 12k 50k 8k4 Low Frequency Expander / Compressor 5 14 -C 14k 17 C3 GS3027 (GS3028) 0µ1 6 All resistors in ohms, all capacitors in microfarads, unless otherwise stated 4 Rƒc = 22k 3 R 0µ22 R =0 MPO 2 =100k VC Fig. 1 Production Test Circuit RHI 200k Linear VB RLO 200k Linear 0µ22 1 9 13 C5 10 16 11 12 10n 1M REGULATOR 8 C1 0µ1 RTH 100k Log 1M SLOW AVERAGE DETECTOR FAST AVERAGE DETECTOR 1 CONTROL 15 RECTIFIER X 50k 48k RH C2 0µ2 Any Knowles or Microtronics microphone 12k 5 C4 High Frequency Expander / Compressor 12 dB / Oct (24 dB / Oct) BAND SPLIT FILTER 10k -A 7 VB VB RAGC_IN -B 14 -C 0µ1 RL Low Frequency Expander / Compressor Any Knowles Class D receiver 2µ2 48k 8k4 14k 17 R MPO 50k Log C3 GS3027 0µ1 (GS3028) 6 All resistors in ohms, all capacitors in microfarads, unless otherwise stated 4 2 3 R ƒc 100k Log 0µ22 R VC 100k Log Fig. 2 Maximum Flexibility Hearing Instrument Application 3 521 - 34 - 03 VB 0µ22 1 9 13 C5 10 16 11 12 10n 1M REGULATOR 8 C1 0µ1 1M SLOW AVERAGE DETECTOR FAST AVERAGE DETECTOR 1 CONTROL 15 RECTIFIER X 50k RAGC_IN 48k RH C2 -A 0µ2 12k 5 C4 High Frequency Expander / Compressor 12 dB / Oct (24 dB / Oct) BAND SPLIT FILTER 10k 7 Any Knowles or Microtronics microphone VB VB -B 14 -C 0µ1 RL Low Frequency Expander / Compressor Any Knowles Class D receiver 48k 8k4 14k 17 C3 GS3027 0µ1 (GS3028) 6 4 All resistors in ohms, all capacitors in microfarads, unless otherwise stated 2 3 R 0µ22 VC 100k Log Fig. 3 Minimum Component Hearing Instrument Application VB=1.3V RHI1 = 200k RHI2 = 0 RLO1 = 200k RLO2 = 0 0µ22 1 13 9 16 10 11 12 C5 10n 1M REGULATOR 8 C1 0µ1 2µ2 SLOW AVERAGE DETECTOR 1M FAST AVERAGE DETECTOR 1 CONTROL 15 RECTIFIER X R TH 50k =∞ VB RAGC_IN 48k RH 3.9k C2 Pink Noise Generator or 1kHz for I/O 5 12 dB / Oct (24 dB / Oct) BAND SPLIT FILTER 10k -A 7 0µ2 C4 High Frequency Expander / Compressor -B 14 -C 0µ1 48k 8k4 RL 50k Low Frequency Expander / Compressor 12k 14k 17 C3 GS3027 0µ1 (GS3028) 6 All resistors in ohms, all capacitors in microfarads, unless otherwise stated 4 R =100k ƒc 3 0µ22 Fig. 4 Characterization Circuit (Used to generate typical curves) 521 - 34 - 03 4 2 R VC =100k R MPO =0 0µ22 RLO 12 1:1 13 RHI 11 CSAD 9 4:1 10 VREG 8 MICROPHONE OUT 14 RTH 15 VB 1 BOUT 2 2:1 16 MPO 17 BIN 3 FOUT 4 GND 5 Rƒc 6 0µ22 VOLUME CONTROL RECEIVER + IN 7 - + BATTERY + Fig. 5 Typical Assembly Diagram TYPICAL PERFORMANCE CURVES -10 50 2:1 3:1 -30 40 VIN = -60dBV 4:1 30 -40 GAIN (dB) OUTPUT LEVEL (dBV) VIN = -96dBV VIN = -80dBV -20 1.5:1 -50 1.2:1 -60 20 VIN = -40dBV VIN = -20dBV 10 1:1 -70 0 -80 -90 -100 -90 - 80 -70 -60 -50 -40 -30 -10 20 -20 100 VIN = -60dBV RVC = 220kΩ 40 0.8 RVC = 100kΩ 0.7 30 GAIN (dB) RHI1 RHI1+RHI2 ) 0.9 ( 20k 50 1.0 0.6 0.5 RLO1 10k Fig. 7 Frequency Response for Different Input Levels Fig. 6 I/O Transfer function for Different Compression Ratios RLO1+RLO2 1k FREQUENCY (Hz) INPUT LEVEL (dBV) 0.4 RVC = 47kΩ RVC = 22kΩ 20 RVC = 10kΩ 10 0.3 0.2 0 0.1 -10 20 0.0 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 100 1k 10k 20k COMPRESSION RATIO (RATIO) FREQUENCY (Hz) Fig. 8 Compression Settings Resistor Ratio for High Pass Channel (RHI1 & RHI2) and Low Pass Channel (RLO1 & RLO2) Fig. 9 Frequency Response for Different RVC Values 5 521 - 34 - 03 -10 -10 COMPRESSION 1:1 RM PO = 0Ω RM PO = 10kΩ OUTPUT LEVEL (dBV) OUTPUT LEVEL (dBV) -20 -20 RM PO = 22kΩ RM PO = 50kΩ -30 -40 -30 RTH = ∞ RTH = 0Ω -40 RTH = 10kΩ -50 RTH = 22kΩ RTH = 47kΩ -60 RTH = 100kΩ -50 -50 -40 -30 -70 -100 -20 -90 -80 INPUT LEVEL (dBV) Fig. 10 I/O Transfer Function for Fig. 11 Different RMPO Resistors -50 -40 30 -20 30 -20 I/O Transfer Function for 10000 RH & RL RESISTORS VALUES (kΩ) 198kΩ 100 9kΩ 10 -90 -80 -70 -60 -50 -40 30 1.6MΩ 1000 1:1 100 72kΩ 2:1 4:1 15kΩ 10 -100 -20 -90 -80 -70 -60 -50 -40 INPUT LEVEL (dBV) INPUT LEVEL (dBV) Fig. 12 Stage A Compressor Feedback Resistor Value Fig. 13 Expander / Compressor Resistors Values GAIN (dB) 50 50 Crossover Frequency Rƒc = ∞ 40 40 30 30 20 GAIN (dB) RAGC RESISTOR VALUE (kΩ) -60 Different RTH Resistors 1000 1 -100 -70 INPUT LEVEL (dBV) 4:1 in Low Frequency 1:1 in High Frequency 10 Crossover Frequency Rƒc = ∞ 20 10 4:1 in Low Frequency 1:1 in High Frequency 1:1 in Low Frequency 4:1 in High Frequency 0 -10 20 521 - 34 - 03 0 VIN = -80dBV 100 1k 10k -10 20 20k 1:1 in Low Frequency 4:1 in High Frequency 100 1k VIN = -80dBV 10k FREQUENCY (Hz) FREQUENCY (Hz) Fig. 14 Crossover Frequency Representation Fig. 15 Crossover Frequency Representation for GS3027 Processor for GS3028 Processor 6 20k 50 50 1:1 in Low Frequency Gain 4:1 in High Frequency 1:1 in Low Frequency Gain 4:1 in High Frequency 40 40 Rƒc=∞ 100kΩ 30 30 47kΩ 20 22kΩ 10kΩ 10 47kΩ GAIN (dB) GAIN (dB) Rƒc=∞ 100kΩ 20 22kΩ 10 0Ω 0Ω 0 0 -10 20 VIN = -80dBV 100 1k 10k -10 20 20k VIN = -80dBV 100 1k 10k 20k FREQUENCY (Hz) FREQUENCY (Hz) Fig. 16 GS3027 Frequency Response Fig. 17 GS3028 Frequency Response for Different Rƒc Resistor Values for Different Rƒc Resistor Values 10 10 ƒ= 1 kHz THD & NOISE (%) VIN = -40dBV THD & NOISE (%) 10kΩ GS3028 1 1 GS3028 GS3027 0.1 100 1000 0.1 -80 10000 GS3027 -70 -60 -50 -40 -30 FREQUENCY (Hz) INPUT LEVEL (dBV) Fig. 18 THD and Noise vs Frequency Fig. 19 THD and Noise vs Input Level -20 10 10 VIN = -40dBV ∆ƒ = 200Hz ƒ = 4kHz ∆ƒ = 200Hz IMD (%) IMD (%) 1 1 GS3027 GS3027 0.1 GS3028 0.1 3000 GS3028 10000 0.01 -80 100000 -70 -60 -50 -40 -30 FREQUENCY (Hz) INPUT LEVEL (dBV) Fig. 20 Intermodulation Distortion (CCIF) vs Frequency Fig. 21 Intermodulation Distortion -20 (CCIF) vs Input Level 7 521 - 34 - 03 0.180 (4.57) XXXXXX GS3027 0.090 MAX (2.28) 0.110 (2.79) 13 12 11 10 14 15 16 17 9 8 7 5 2 1 3 4 6 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 ± 0.003 (± 0.08) unless otherwise stated. Smallest pad 0.0195 x 0.025 (0.50 x 0.64) Largest pad 0.020 x 0.063 (0.50 x 1.60) XXXXXX - work order number. Component name - either GS3027 or GS3028. Fig. 22 Hybrid Layout & Dimensions GENNUM CORPORATION 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. 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 REVISION NOTES: GENNUM JAPAN CORPORATION Updated to Data sheet C-101, Miyamae Village, 2-10-42 Miyamae, Suginami-ku, Tokyo 168-0081, Japan Tel. +81 (3) 3334-7700 Fax: +81 (3) 3247-8839 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 1995 Gennum Corporation. All rights reserved. 521 - 34 - 03 8 Printed in Canada.