Philips Semiconductors

Product specification

SA572

Programmable analog compandor

2

1998 Nov 03

853-0813 20294

DESCRIPTION

The SA572 is a dual-channel, high-performance gain control circuit

in which either channel may be used for dynamic range

compression or expansion. Each channel has a full-wave rectifier to

detect the average value of input signal, a linearized,

temperature-compensated variable gain cell (

∆G) and a dynamic

time constant buffer. The buffer permits independent control of

dynamic attack and recovery time with minimum external

components and improved low frequency gain control ripple

distortion over previous compandors.

The SA572 is intended for noise reduction in high-performance

audio systems. It can also be used in a wide range of

communication systems and video recording applications.

FEATURES

external op amp

PIN CONFIGURATION

1

2

3

4

5

6

7

8

9

10

11

12

13

14

16

15

TRACK TRIM A

RECOV. CAP A

RECT. IN A

ATTACK CAP A

THD TRIM A

GND

∆G OUT A

∆G IN A

TRACK TRIM B

RECOV. CAP B

RECT. IN B

ATTACK CAP B

THD TRIM B

∆G OUT B

∆G IN B

VCC

NOTE:

1. D package released in large SO (SOL) package only.

SR00694

Figure 1. Pin Configuration

APPLICATIONS

ORDERING INFORMATION

DESCRIPTION

TEMPERATURE RANGE

ORDER CODE

DWG #

16-Pin Plastic Small Outline (SOL)

–40 to +85

°C

SA572D

SOT162-1

16-Pin Plastic Dual In-Line Package (DIP)

–40 to +85

°C

SA572N

SOT38-4

ABSOLUTE MAXIMUM RATINGS

SYMBOL

PARAMETER

RATING

UNIT

Supply voltage

22

Operating temperature range

SA572

–40 to +85

°C

Power dissipation

500

mW