HEI GL6552 Datasheet

REF

EXP IN

VCC

EXP RECT

ALC

EXP OUT

COMP OUT

C-ACF

COMP RECT

GND

COMP NF

GL6552

EXP MUTE

COMP MUTE

COMP IN

14 DIP, 14 SOP(150mil)

General Descriptions

The GL6552 is a Compander IC, which contains two variable gain circuits configured for compressing and expanding the dynamic range, and improving of S/N ratio of audio signal. It consists of compressor, expander, Mic Amp, limiter, ALC(Automatic Level Control)and mute logic. The compressor circuit has the 2/1 ratio of input/output ratio by logarithm, and the expander circuit by logarithm. An internal, temperature stable bandgap reference provides the necessary precision voltage and current. Applications include cordless telephone and most voice RF links.

Features

• Operating Supply Voltage: 2 ~ 6 V

• Built in ALC circuit

• Built in Mute logic circuit

• Easy gain control to use external component

Absolute Maximum Ratings(Ta = 25¡É.)

GL6552

Low Voltage Compander

Pin Configuration

Parameter Symbol Spec. Unit Remark

Max. Supply Voltage V Power Dissipation P Storage Temperature T

Stress above those listed under “Absolute Maximum Rating” may cause permanent damage of device. This is stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for longer periods may affect device reliability. During overload conditions (VIN > VCC or VIN <GND), those voltage on VCC pins with respect to ground must not exceed the values defined by the absolute maximum ratings.

CC, MAX

600 mW

D.MAX

-55 ~+150

STG

7 V

¡É

Operating Conditions (Ta = 25¡É)

Parameter symbol Spec. Unit Remark

Operating Voltage V Operating Temperature TOP -20 ~ +70

2 ~ 6 V

¡É

BLOCK DIAGRAM

3 2 5

4 1 9

REGULATOR

RECTIFIER

ALC

GAIN CELL

MUTE LIMITER

MUTE RECTIFIER

GAIN CELL

COMP OUT

ACF

COMP RECT

ALC

COM P NF

COM P IN EXP MUTE

EXP OUT EXP RECT

EXP IN

REF

GND VCC

COMP MUTE

To V

REF

65K 65K 10K 10K

30K

To V

REF

25.8K 3.3K 100K 51K

To V

REF

10K 30K

EXPANDER

COMPRESSOR

GL6552

−

C-

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