Preliminary
PT12311
Stereo Audio Processor for Car Audio
DESCRIPTION
The PT12311 is an audio processor designed for
versatile application, includes 3 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 car
audio business, the PT12311 improves both audio
performances and input surge current capability, these
causes the PT12311 is the best solution for the
cost-effective car audio systems.
FEATURES
•
3 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 = 5V to 10V)
•
Low harmonic distortion, low noise
APPLICATIONS
•
Car Audio
•
Home Audio System
•
Powered Speaker System
APPLICATION CIRCUIT
22uF
PT12311
SCL 28
SDA 27
DGND 26
LFOUT 25
RFOUT 24
LROUT 23
RROUT 22
BOUT_R 21
BIN_R 20
BOUT_L 19
BIN_L 18
LOUT 17
LIN 16
LIN1 15
10uF
10uF
10uF
10uF
100n
100n
100n
100n
2.2uF
5.6K
Rear Right
5.6K
Front Right
Front Left
1 REF
VDD
2 VDD
3 AGND
27n
27n
MCU
4 TREB_L
5 TREB_R
6 RIN
7 ROUT
8 LOUD_R
Input Surge
Protection
L
AUDIO 3
R
L
AUDIO 2
R
L
AUDIO 1
R
2.2K
2.2K
2.2K
2.2K
2.2K
2.2K
2.2uF
2.2uF
100n
2.2uF
2.2uF
2.2uF
100n
2.2uF
2.2uF
9 RIN3
10 RIN2
11 RIN1
12 LOUD_L
13 LIN3
14 LIN2
Rear Left
Power
Amplifier
Tel: 886-66296288
‧
Fax: 886-29174598
‧
http://www.princeton.com.tw
‧
2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan
PTC [ PRINCETON TECHNOLOGY CORP ]
