TDA7449_04 datasheet(1/19 Pages) STMICROELECTRONICS

部件名	TDA7449

功能描述	TONE CONTROL DIGITALLY CONTROLLED AUDIO PROCESSOR

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制造商	STMICROELECTRONICS [STMicroelectronics]

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TDA7449

June 2004

1FEATURES

■

INPUT MULTIPLEXER

– 2 STEREO INPUTS

– SELECTABLE INPUT GAIN FOR OPTIMAL

ADAPTATION TO DIFFERENT SOURCES

■

ONE STEREO OUTPUT

■

TREBLE, AND BASS CONTROL IN 2.0dB

STEPS

■

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

2DESCRIPTION

The TDA7449 is a volume tone (bass and treble)

balance (Left/Right) processor for quality audio

applications in TV systems. Selectable input gain

is provided. Control of all the functions is accom-

plished 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.

TONE CONTROL

DIGITALLY CONTROLLED AUDIO PROCESSOR

Figure 2. Block Diagram

0/30dB

2dB STEP

MUXOUTL

VOLUME

TREBLE

TREBLE(L)

BASS

MUXOUTR

TREBLE(R)

SPKR ATT

LEFT

LOUT

SCL

SDA

DIG_GND

ROUT

D98AU847A

I

2CBUS DECODER + LATCHES

100K

G

L-IN1

L-IN2

100K

R-IN1

R-IN2

G

INPUT MULTIPLEXER

+ GAIN

BOUT(L)

SPKR ATT

RIGHT

BIN(R) BOUT(R)

SUPPLY

CREF

AGND

VS

BIN(L)

5

8

9

7

6

19

20

18

4

2

3

11

17

12

13

1

10

16

15

14

RB

VREF

REV. 4

Figure 1. Package

Table 1. Order Codes

Part Number

Package

TDA7449

DIP20

TDA7449D

SO20

DIP20

SO20

类似零件编号 - TDA7449_04

制造商	部件名	数据表	功能描述
STMicroelectronics	TDA7449L	90Kb / 13P	LOW COST DIGITALLY CONTROLLED AUDIO PROCESSOR
	TDA7449L	104Kb / 14P	LOW COST DIGITALLY CONTROLLED AUDIO PROCESSOR
	TDA7449L	104Kb / 14P	LOW COST DIGITALLY CONTROLLED AUDIO PROCESSOR

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制造商	部件名	数据表	功能描述
STMicroelectronics	TDA7440	741Kb / 17P	TONE CONTROL DIGITALLY CONTROLLED AUDIO PROCESSOR
	TDA7440D	212Kb / 17P	TONE CONTROL DIGITALLY CONTROLLED AUDIO PROCESSOR
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	TDA7463A	123Kb / 12P	LOW VOLTAGE TONE CONTROL DIGITALLY CONTROLLED AUDIO PROCESSOR
	TDA7463AD	145Kb / 13P	LOW VOLTAGE TONE CONTROL DIGITALLY CONTROLLED AUDIO PROCESSOR
	TDA7442	154Kb / 17P	TONE CONTROL AND SURROUND DIGITALLY CONTROLLED AUDIO PROCESSOR
	TDA7463	175Kb / 12P	LOW VOLTAGE TONE CONTROL DIGITALLY CONTROLLED AUDIO PROCESSOR REV. 5 April 2010

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