TDA7449L View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

TDA7449L

LOW COST DIGITALLY CONTROLLED AUDIO PROCESSOR

STMicroelectronics 

TDA7449L

LOW COST

DIGITALLY CONTROLLED AUDIO PROCESSOR

1 FEATURES

■ INPUT MULTIPLEXER

– 2 STEREO INPUTS

– SELECTABLE INPUT GAIN FOR OPTIMAL

ADAPTATION TO DIFFERENT SOURCES

■ ONE STEREO OUTPUT

■ VOLUME CONTROL IN 1.0dB STEPS

■ TWO SPEAKER ATTENUATORS:

– TWO INDEPENDENT SPEAKER CONTROL

IN 1.0dB STEPS FOR BALANCE FACILITY

– INDEPENDENT MUTE FUNCTION

■ ALL FUNCTION ARE PROGRAMMABLE VIA

SERIAL BUS

2 DESCRIPTION

The TDA7449L is a volume control and balance

(Left/Right) processor for quality audio applica-

tions in TV systems.

Figure 2. Block Diagram

Figure 1. Package

DIP20

Table 1. Order Codes

Part Number

TDA7449L

Package

DIP20

Selectable input gain is provided. Control of all the

functions is accomplished by serial bus.

The AC signal setting is obtained by resistor net-

works and switches combined with operational

amplifiers.

Thanks to the used BIPOLAR/CMOS Technology,

Low Distortion, Low Noise and DC stepping are

obtained.

8

L-IN1

9

L-IN2

100K

100K

MUXOUTL

10

G

VOLUME

SPKR ATT

LEFT

5

LOUT

7

R-IN1

6

R-IN2

100K

100K

0/30dB

2dB STEP

I2CBUS DECODER + LATCHES

19

SCL

20

SDA

18

DIG_GND

G

VOLUME

INPUT MULTIPLEXER

+ GAIN

11

MUXOUTR

SPKR ATT

RIGHT

VREF

SUPPLY

1

CREF

4

ROUT

2

3 VS

AGND

D98AU868

June 2004

REV. 3

1/14

Share Link: