Gennum Corporation GS3023 Datasheet

FEATURES

CIC Size DynamEQ® I

Dynamic Equalizer - Class D

GS3023 - DATA SHEET

• unique twin average detectors

• dual channel signal processing

• adjustable AGC threshold levels

• MPO range externally adjustable

• handles high input levels (up to 100 mVRMS)
cleanly

• designed for CIC instruments

• 2:1 compression of high frequencies

• designed to drive class D integrated receivers

• 65% smaller by volume than DynamEQ

• 50% smaller by volume than DynamEQ

®

I (GS3011)

®

I (GS3021)

STANDARD PACKAGING

• Hybrid Typical Dimensions

0.180 in x 0.115 in x 0.080 in
(4.57 mm x 2.92 mm x 2.03 mm)

DESCRIPTION

DynamEQ

®

I (GS3023) hybrid is a dual channel level dependent

input compression amplifier.

This WDRC (Wide Dynamic Range Compression) system can
be easily configured to provide either a TILL (Treble Increases
at Low Level) or wideband response.

Twin averaging detector circuits drastically reduce the pump­ing effects associated with traditional fast attack/slow release
systems. The fast detection circuitry cuts in to control the
output level during impulsive sounds, but quickly backs out of
the way during normal operation.

Low distortion, large signal handling capabilities and constant
corner frequncy make it ideal for providing loudness growth
compensation for many of the mild to moderate cases.

The size of the hybrid and variety of electrical access points,
offers system design flexibility perfect for ITC and CIC
applications.

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 fixed
gain stage with MPO control designed to drive class D
integrated receivers.

V

B

13

V

REG

1

R

12

TH

10

C

HP

IN

MGND

GND

All resistors in ohms, all capacitors in farads unless otherwise stated.
Patent Pending.

C1

9

3n9

C2
0µ1

6

8

REGULATOR

68k

12k

50k

C

SAD

11

DETECTOR

CURRENT

REFERENCE

- B

100k

SLOW

AVERAGE

- A

50k

C

14

2:1

COMPRESSION

CONTROL

50k

C3

0µ1

7

AB

OUT

FAD

C6

0µ1

100k

FAST

AVERAGE

DETECTOR

RECTIFIER

50k

C4

82n

C

- C

2

IN

V

B

48k

D

8k4

3
C

OUT

48k

GS3023

C5

47n

5

OUT

MPO

4

FUNCTIONAL BLOCK DIAGRAM

Revision Date: May 1998 Document No. 521 - 15 - 03

GENNUM CORPORATION P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3 tel. [phone]

Web Site: www.gennum.com E-mail: [e-mail]

ABSOLUTE MAXIMUM RATINGS

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

PAD CONNECTION

V

M

GND

REG

1

6

9

C

C

IN

2

7

AB

10

OUT

OUT

MPO

34

14

C

FAD

11

OUT

5

8

12

GND

13

CAUTION

IN

CHP

C

SAD

R

V

TH

B

CLASS 1 ESD SENSITIVITY

ELECTRICAL CHARACTERISTICS

Conditions: Input Level VIN = -97dBV, Frequency = 5 kHz, Temperature = 25°C, Supply Voltage VB = 1.3 V

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Hybrid Current I
Minimum Voltage V

AMP

B

Total Harmonic Distortion THD RVC= 15kΩ; VIN= -40dBV at1kHz - 0.1 1 %
Input Referred Noise IRN NFB 0.2 to 10kHz at 12dB/oct - 2.5 - µVRMS
Total System Gain A

V

AGC

Compression Ratio COMP VIN= -60dBV & -80dBV 1.74:1 1.95:1 2.11:1 Ratio
Threshold - -94 - dBV
Compression Gain Range A
High Pass Corner Frequency ƒ
System Gain in Compression A

RANGE

HPC

80

OUTPUT STAGE

Maximum Output Level MPO VIN = -20dBV, RMPO = 0Ω -14.3 -12.3 -10.3 dBV
MPO Range ∆MPO VIN = -20dBV, RMPO = 0 to 50kΩ 13.8 15.8 17.8 dB
Stage D Gain A

D

REGULATOR

Regulator Voltage V

REG

VIN = 0VRMS, RMPO = 50kΩ 120 230 380 µA

1.1 - - V

45 48 51 dB

RVC= 10kΩ; Note 1 26 28 - dB
CHP - Not Connected - 3.4 - kHz
VIN = -80dBV 38 40 42 dB

-16 -dB

0.89 0.94 0.99 V

All parameters remain as shown in the Test Circuit unless otherwise stated in CONDITIONS column

Notes: 1. A

521 - 15 - 03

RANGE

= V

P3 [VIN

= -97dBV] - V

= -20 dBV] + 77dBV

P3 [VIN

2

1.3V

2µ2

13

11 14

C6
0µ1

100k

CURRENT

SLOW

AVERAGE

DETECTOR

- A

- B

50k

2:1

COMPRESSION

CONTROL

C3

1

2µ2

12

C

HP

=0µ1

3k9

V

IN

10

C1

9

3n9

C2
0µ1

6

8

All resistors in ohms, all capacitors in farads unless otherwise stated.

REGULATOR

68k

REFERENCE

12k

50k

50k

0µ1

7

100k

FAST

AVERAGE

DETECTOR

RECTIFIER

50k

C4

82n

- C

2

R

VC

100k

V

B

48k

48k

C5

47n

5

50k

4

R

=0

MPO

D

8k4

GS3023

3

Fig.1 Production Test Circuit

1.3V

RECOMMENDATIONS: 2.2µF capacitor connected to pin11

2µ2

2µ22µ2

13

11 14

C6
0µ1

No components connected to pin 14

1

2µ2

12

10

C1

9
EM3046
or
MODEL 39

All resistors in ohms, all capacitors in farads unless otherwise stated.

3n9

C2
0µ1

6

8

REGULATOR

68k

12k

50k

DETECTOR

CURRENT

REFERENCE

- B

Fig. 2 Typical Hearing Instrument Application

100k

SLOW

AVERAGE

- A

50k

2:1

COMPRESSION

CONTROL

50k

50k

C3

0µ1

7

3

100k

FAST

AVERAGE

DETECTOR

RECTIFIER

C4

82n

- C

2

R

VC

100k

V

B

1.3V

48k

48k

GS3023

C5

47n

5

4

ES3126

2µ2

D

8k4

3

521 - 15 - 03