TDA7469A 查看數據表（PDF） - STMicroelectronics

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TDA7469A

LOW VOLTAGE ANALOG AUDIO PROCESSOR WITH HEADPHONE POWER AMPLIFIER

STMicroelectronics 

®

TDA7469

LOW VOLTAGE ANALOG AUDIO PROCESSOR WITH

HEADPHONE POWER AMPLIFIER

PRODUCT PREVIEW

2 STEREO INPUT

1 STEREO OUTPUT

TREBLE BOOST

BASS CONTROL

BASS AUTOMATIC LEVEL CONTROL

VOLUME CONTROL IN 1dB STEPS

MUTE

STAND-BY FUNCTION SOFTWARE CON-

TROLLED

ALL FUNCTION ARE PROGRAMMABLE VIA

SERIAL BUS

DESCRIPTION

The TDA7469 is a volume tone (bass and treble)

processor 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

amplifiers.

SO20

SO16

SSOP24

ORDERING NUMBER: TDA7469 (SSOP24)

TDA7469D (SO16)

TDA7469A (SO20)

Thanks to the used BIPOLAR/CMOS Technology,

Low Distortion, Low Noise and DC stepping are

obtained.

BLOCK DIAGRAM TDA7469 (SSOP24)

0.47µF

IN1-R

25K

25K

0.47µF

IN2-R

25K

25K

0.47µF

ALC

IN1-L

0.47µF

25K

25K

0.47µF

IN2-L

25K

25K

D00AU1234

3.3nF

MUX_R TREBLE-R

+6dB ÷

0dB

VOLUME

+6dB ÷

-63dB

gm

TREBLE

BASS_ALC

CONTROL

HALF_WAVE

RECTIFIER

+6dB ÷

-63dB

VOLUME

+6dB ÷

0dB

TREBLE

gm

MUX_L

TREBLE-L

3.3nF

5.6K

68nF 68nF

BASSI-R

BASSO-R

RB

BASS

x1

SUPPLY

220µF

PGND-R

PVS-R

16Ω or

32Ω

OUT-R

I2C BUS DECODER + LATCHES

SUPPLY

BASS

RB

x1

VREF

SUPPLY

SCL

SDA

PVS-L

PGND-L

220µF

VS

OUT-L

16Ω or

32Ω

BASSI-L

BASSO-L GND

68nF 68nF

5.6K

CREF

22µF

June 2001

1/17

This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

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