PT2312E

Stereo Audio Processor for Car Audio

DESCRIPTION

The PT2312E is an audio processor designed for

versatile application, includes 4 stereo input selector with

adjustable gain, master volume control with low

frequency loudness compensation, individual output

attenuator and tone control. It is a good solution for the

car audio signal processing.

Due to the high reliability requirement from the audio

business,

the

PT2312E

improves

both

audio

performances and input surge current capability, these

causes the PT2312E is the best solution for the

cost-effective audio systems.

APPLICATIONS

• Car Audio

• Home Audio System

• Powered Speaker System

FEATURES

• 4 stereo inputs with gain selection, range from 0dB

to +11.25dB in 3.75dB/step

• Master volume from 0 dB to -78.75dB in

1.25dB/step

• Speaker attenuator for balance and fader, range

from 0dB to -38.75dB in 1.25dB/step

• Each channel output can be muted individually.

• Low frequency loudness compensation

• Bass and Treble control, range from -14dB to

+14dB in 2dB/step

• Wide operation range (VDD=4V to 10V)

• Improved and replace PT2312 and PT2312A

APPLICATION CIRCUIT

2.2uF

2.2uF

22uF

VDD

2.7n

2.7n

100n

100n

100n

100n

100n

100n

5.6K

5.6K

Front Left

Front Right

Rear Left

Rear Right

10uF

10uF

10uF

10uF

Power

Amplifier

2.2uF

2.2uF

2.2uF

2.2uF

2.2uF

2.2uF

AUDIO 1

AUDIO 2

AUDIO 3

2.2K

2.2K

2.2K

2.2K

2.2K

2.2K

L

L

L

R

R

R

Input Surge

Protection

MCU

PT2312E

2.2uF

2.2uF

AUDIO 4

2.2K

2.2K

L

R

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

30

29

31

32

LIN3

LIN2

LIN1

LIN

LOUT

BOUT_L

BIN_L

BIN_R

BOUT_R

RROUT

LROUT

RFOUT

LFOUT

DGND

SDA

SCL

REF

VDD

AGND

TREB_L

TREB_R

RIN

ROUT

LOUD_R

RIN3

RIN2

RIN1

LOUD_L

NC

NC

RIN4

LIN4