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DynamEQ(R) II WDRC IC
GE570 - DATA SHEET
FEATURES * dual channel signal processing * 4th order state variable filter * adjustable crossover frequency * adjustable compression ratio from 1:1 to 4:1 * independent compression ratio adjustment for low and high frequency band * adjustable AGC threshold levels * unique twin average detectors * handles high input levels * low THD and IMD distortion * drives class D integrated receivers * MPO range externally adjustable PACKAGING * Chip Au Bump
VB 18 CSAD 7 1M VREG 8
REGULATOR SLOW AVERAGE DETECTOR
DEVICE DESCRIPTION The DynamEQ(R) II product family is a second generation Wide Dynamic Range Compression (WDRC) system. GE570 incorporates 24 dB/oct filtering and is designed to accommodate CIC and ITC size requirements. The gain and frequency response is dependant on the user's environment. Twin averaging detector circuits are optimized for sound quality during normal listening without sacrificing comfort during sudden loud inputs. All input signals to DynamEQ(R) II, are processed by 2:1 compression before subsequent band splitting. The 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. The gain setting stage is followed by a class D integrated receiver preamplifier stage. Symmetrical peak clipping is used to achieve MPO adjustment.
CFAD 2 1M
FAST AVERAGE DETECTOR
1:1A 1
53k5
1:1B 6 85k6
4:1 5
RHI RLO 4 3
RTH 19 50k R
CONTROL
1
RECTIFIER
X
VB 48k RH
AGC_IN
IN
11 10k
-A
24 dB / Oct BAND SPLIT FILTER
High Frequency Expander / Compressor
-B
-C
20 48k
OUT
RL GND 9 10 AOUT
All resistors in ohms, all capacitors in microfarads, unless otherwise stated
8k4 15 14 FOUT BIN 16 BOUT 17 MPO
12k 12 REC RFC
14k 13
Low Frequency Expander / Compressor
FUNCTIONAL BLOCK DIAGRAM
Document No. 522 - 07 - 00
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
OUT 20 1:1A 1 CFAD 2
PAD CONNECTION
RLO 3 RHI 4 4:1 5 1:1B 6 CSAD 7 8 9
VREG GND
10 11
-20 C to 70 C
RTH 19
AOUT IN
CAUTION CLASS 1 ESD SENSITIVITY
12 VB 18 17 BOUT 16 BIN 15 MPO 14 FOUT 13 Rc
REC
ELECTRICAL CHARACTERISTICS
Conditions: Supply Voltage VB = 1.3 V, Frequency = 1 kHz, Temperature = 25C
PARAMETER IC Current Minimum Voltage Total Harmonic Distortion THD with Maximum Allowable Input Input Referred Noise Total System Gain Regulator Voltage AGC Lower Threshold Upper Threshold Compression Gain Range System Gain in Compression Min. Compression Ratio
SYMBOL IAMP Vb THD THDM IRN AV VREG
CONDITIONS
MIN 1.1
TYP 370 0.2 2 3.0 49 930
MAX 530 1.0 10 52 1000
UNITS A V % % VRMS dB mV
VIN = -40dBV at 1kHz VIN = -23dBV, Rvc = 47k Aweight VIN = -90dBV ILOAD = 30A
46 890
THLO THHI A A60 CMP1 :1 Gain(-90dBVIN) -Gain(-30dBVIN) VIN =-60dBV VIN=3kHz, -60dBV to -40dBV, Rhp=1:1 Rlp=1:1
-91 -36 37.5 26
-87 -32 40.5 29
-83 -28 43.5 32
dBV dBV dB dB
0.9
1.0
1.1
Ratio
Max. Comp. Ratio
CMP4 :1
VIN =3kHz, -60dBV to -40dBV, Rhp=4:1, Rlp=4:1 3.6 4.0 10 220 4.3 Ratio ms ms
Fast Detector Time Constant Slow Detector Time Constant FILTER Maximum Cross-over Frequency Nominal Cross-over Frequency Minimum Cross-over Frequency Filter Rolloff Rate STAGE A and B Open Loop Gain (B) Input Impedance (A) OUTPUT STAGE Stage Gain Max Output Level MPO Range Output Resistance
FAST SLOW
c_0 c_22 c_220 Rc=0 Rc=22k Rc=220k
3.0 1.5 -
3.9 1.9 0.9 24
2.3 1.4 -
kHz kHz kHz dB/oct
AOL_B RIN
8
52 11
12
dB k
AC MPO MPO ROUT
VIN=-30dBV RVC=220k,VIN=-25dBV RMPO=0 to 50k
7 -14.5 13 -
9 -12.5 15 24
11 -10.5 17 -
dB dBV dB k
All conditions and parameters remain as shown in Test Circuit unless otherwise stated in "Conditions" column. 522 - 07 - 00
2
VB 022 18 7 1M 8 22 19 R = 50k RAGC_IN RH 11 VIN -A 3.9k 02 10k 12 dB / Oct (24 dB / Oct) BAND SPLIT FILTER High Frequency Expander / Compressor RL Low Frequency Expander / Compressor 8k4 15 14 16 17 -B -C 01 48k 50k 48k 20 1 CONTROL RECTIFIER X VB REGULATOR SLOW AVERAGE DETECTOR 2 1M FAST AVERAGE DETECTOR 10n 1 53k5 6 85k6 5 4 3
TH
9 10
12k 12
14k 13 Rc = 22k
All resistors in ohms, all capacitors in microfarads, unless otherwise stated
01
R 022 R VC =100k
=0 MPO
Fig. 1 Production Test Circuit
RHI VB 500k RLO 022 18 7 1M 8 01 REGULATOR SLOW AVERAGE DETECTOR 2 1M FAST AVERAGE DETECTOR 10n 1 53k5 6 85k6 500k 5 4 3
RTH 100k Log
19 50k
CONTROL RAGC_IN
1 RECTIFIER X VB VB
11 -A 02 Any Knowles or Microtronics microphone 10k
12 dB / Oct (24 dB / Oct) BAND SPLIT FILTER
RH High Frequency Expander / Compressor RL Low Frequency Expander / Compressor
48k -B -C
20 48k 8k4
01 22
9 10
12k 12
Any Knowles Class D receiver
14k 13 R 14 16 17 15 R MPO 50k Log
All resistors in ohms, all capacitors in microfarads, unless otherwise stated
01
c 100k Log
022
R VC 100k Log
Fig. 2 Maximum Flexibility Hearing Instrument Application
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VB 022 18 7 1M 8 01 1 CONTROL 50k RAGC_IN RH 11 -A 02 Any Knowles or Microtronics microphone 10k 12 dB / Oct (24 dB / Oct) BAND SPLIT FILTER High Frequency Expander / Compressor RL Low Frequency Expander / Compressor 12k 10 12 14k 13 14 16 17 8k4 15 -B -C 48k 20 01 48k Any Knowles Class D receiver RECTIFIER X VB VB REGULATOR SLOW AVERAGE DETECTOR 2 1M FAST AVERAGE DETECTOR 10n 1 53k5 6 85k6 5 4 3
19
9
All resistors in ohms, all capacitors in microfarads, unless otherwise stated
01
022
R
VC
100k Log
Fig. 3 Minimum Component Hearing Instrument Application
VB=1.3V
RHI2=0 RLO2=0 022 10n 2 1M 1M FAST AVERAGE DETECTOR
RHI1 RLO1
18
7
1
6
5
4
3
8 22
REGULATOR
SLOW AVERAGE DETECTOR
19 R = TH 50k
CONTROL RAGC_IN
1 RECTIFIER X VB 48k 20 01 48k RL 8k4 50k 15 14 16 17
RH 11 -A 3.9k 02 10k Pink Noise Generator or 1kHz for I/O 12 dB / Oct (24 dB / Oct) BAND SPLIT FILTER High Frequency Expander / Compressor -B -C
9 10
12k 12
14k 13
Low Frequency Expander / Compressor
All resistors in ohms, all capacitors in microfarads, unless otherwise stated
01
R
c
=100k
022
R
VC
=100k
GS3027 (GS3028) R =0 MPO
Fig. 4 Characterization Circuit (Used to generate typical curves)
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4
TYPICAL PERFORMANCE CURVES
-10 = 1kHz -20 3:1 -30 -40 -50 -60 -70 -80 -90 -100 0 RHI2=RLO2=0 -90 - 80 -70 -60 -50 -40 -30 -20 -10 20 100 1k 10k 20k 1.2:1 1:1 1.5:1 4:1 30 2:1 40 VIN = -60dBV 50 VIN = -96dBV VIN = -80dBV
OUTPUT LEVEL (dBV)
GAIN (dB)
20
VIN = -40dBV VIN = -20dBV
10
INPUT LEVEL (dBV)
FREQUENCY (Hz)
Fig. 5 I/O Transfer function for Different Compression Ratios
Fig. 6 Frequency Response for Different Input Levels
1.0 0.9
50 VIN = -60dBV 40 RVC = 220k RVC = 100k 30
)
RHI1+RHI2 RHI1
0.8 0.7 0.6 0.5
GAIN (dB)
RVC = 47k 20 RVC = 22k RVC = 10k 10
RLO1+RLO2
(
0.4 0.3 0.2 0.1 0.0 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 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
RLO1
0
-10 20
100
1k
10k
20k
COMPRESSION RATIO (RATIO)
FREQUENCY (Hz)
Fig. 7 Compression Settings Resistor Ratio for High Pass Channel (RHI1 & RHI2) and Low Pass Channel (RLO1 & RLO2)
Fig. 8 Frequency Response for Different RVC Values
-10 COMPRESSION 1:1 RM PO = 0
-10
-20
OUTPUT LEVEL (dBV)
OUTPUT LEVEL (dBV)
-20
RM PO = 10k RM PO = 22k RM PO = 50k
-30 RTH = RTH = 0 -40 RTH = 10k -50 RTH = 22k RTH = 47k -60 RTH = 100k
-30
-40
-50 -50
-40
-30
-20
-70 -100
-90
-80
-70
-60
-50
-40
30
-20
INPUT LEVEL (dBV)
INPUT LEVEL (dBV)
Fig. 9
I/O Transfer Function for
Fig. 10
I/O Transfer Function for
Different RMPO Resistors
Different RTH Resistors
5
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1000
10000
198k
RH & RL RESISTORS VALUES (k)
RAG_C RESISTOR VALUE (k)
1.6M 1000
100
10
9k
1:1 100 72k 2:1 4:1 15k 10 -100 -90 -80 -70 -60 -50 -40 30 -20
1 -100
-90
-80
-70
-60
-50
-40
30
-20
INPUT LEVEL (dBV)
INPUT LEVEL (dBV)
Fig. 11 Stage A Compressor Feedback Resistor Value
Fig. 12 Expander / Compressor Resistors Values
50
Rc =
50 1:1 in Low Frequency Gain 4:1 in High Frequency 40 Crossover Frequency 30 Rc= 100k
40
30
GAIN (dB)
GAIN (dB)
47k 20 22k 10 10k
20
10
4:1 in Low Frequency 1:1 in High Frequency 0 1:1 in Low Frequency 4:1 in High Frequency 100 1k VIN = -80dBV 10k 20k
0
0
-10 20
-10 20
VIN = -80dBV 100 1k 10k 20k
FREQUENCY (Hz)
FREQUENCY (Hz)
Fig. 13 Crossover Frequency Representation
Fig. 14 Frequency Response for Different Rc Resistor Values
10
10
THD & NOISE (%)
THD & NOISE (%)
VIN=-40dBV
VIN--40dBV
1
1
0.1 100
0.1
1000 10000
-80
-70
-60
-50
-40
-30
-20
FREQUENCY (Hz)
FREQUENCY (Hz)
Fig. 15 THD and Noise vs Input Level
Fig. 16 THD and Noise vs Input Level
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6
10 VIN=-40dBV =200Hz
10 =4kHz =200Hz 1
IMD (%)
1
IMD (%)
0.1
3000 10000 100000
0.1
0.01 -80 -70 -60 -50 -40 -30 -20
FREQUENCY (Hz)
INPUT LEVEL (dBV)
Fig. 17 Intermodulation Distortion (CCIF) vs Frequency
Fig. 18 Intermodulation Distortion (CCIF) vs Input Level
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
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: New Document.
GENNUM JAPAN CORPORATION
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. (c) Copyright September 1998 Gennum Corporation. All rights reserved. Printed in Canada.
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