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TDA7469

June 2004

1FEATURES

■

2 STEREO INPUT

■

1 STEREO OUTPUT

■

TREBLE BOOST

■

BASS CONTROL

■

BASS AUTOMATIC LEVEL CONTROL

■

VOLUME CONTROL IN 1dB STEPS

■

MUTE

■

STAND-BY FUNCTION SOFTWARE

CONTROLLED

■

ALL FUNCTION ARE PROGRAMMABLE VIA

SERIAL BUS

2DESCRIPTION

The TDA7469 is a volume tone (bass and treble) pro-

cessor for quality audio applications in Low voltage

supply portable systems.

Bass ALC (Automatic Level Control) function can be

adjusted by a dedicated pin. The 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 ampli-

fiers.

Thanks to the used BIPOLAR/CMOS Technology,

Low Distortion, Low Noise and DC stepping are ob-

tained.

LOW VOLTAGE ANALOG AUDIO PROCESSOR WITH

HEADPHONE POWER AMPLIFIER

Figure 2. Block Diagram

IN1-R

ALC

IN2-L

0.47

µF

0.47

µF

SUPPLY

SUPPLY

SUPPLY

VS

GND

CREF

TREBLE-L

D00AU1234

I2C BUS DECODER + LATCHES

SCL

SDA

PVS-L

PGND-L

PGND-R

PVS-R

OUT-L

OUT-R

220

µF

22

µF

TREBLE-R

MUX_R

MUX_L

RB

RB

BASSI-R

BASSO-R

x1

x1

0.47

µF

TREBLE

VOLUME

VOLUME

+6dB

÷

0dB

+6dB

÷

-63dB

+6dB

÷

0dB

3.3nF

+6dB

÷

-63dB

TREBLE

BASS

BASS

BASS_ALC

CONTROL

HALF_WAVE

RECTIFIER

25K

25K

gm

68nF

3.3nF

68nF

68nF

68nF

5.6K

5.6K

16

Ω or

32

Ω

16

Ω or

32

Ω

220

µF

BASSO-L

BASSI-L

IN2-R

0.47

µF

25K

25K

25K

25K

25K

25K

gm

IN1-L

0.47

µF

REV. 2

Figure 1. Package

Table 1. Order Codes

Part Number

Package

TDA7469

SSOP24

TDA746913TR

Tape & Reel

SSOP24