Preliminary 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.
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
APPLICATIONS
•
Car Audio
•
Home Audio System
•
Powered Speaker System
APPLICATION CIRCUIT
22uF
PT2312E
1 REF
SCL 32
SDA 31
DGND 30
LFOUT 29
RFOUT 28
LROUT 27
RROUT 26
BOUT_R 25
BIN_R 24
BOUT_L 23
BIN_L 22
LOUT 21
LIN 20
LIN1 19
LIN2 18
LIN3 17
10uF
10uF
10uF
10uF
100n
100n
100n
100n
2.2uF
5.6K
Rear Right
5.6K
Rear Left
Front Right
Front Left
VDD
2 VDD
3 AGND
MCU
Input Surge
Protection
L
AUDIO 4
R
L
AUDIO 3
R
L
AUDIO 2
R
L
AUDIO 1
R
27n
2.2K
2.2K
2.2K
2.2K
2.2K
2.2K
2.2K
2.2K
2.2uF
2.2uF
2.2uF
100n
2.2uF
2.2uF
2.2uF
2.2uF
2.2uF
100n
27n
2.2uF
4 NC
5 TREB_L
6 TREB_R
7 RIN
8 ROUT
9 LOUD_R
10 RIN4
11 RIN3
12 RIN2
13 RIN1
14 NC
15 LOUD_L
16 LIN4
Power
Amplifier
Tel: 886-66296288
‧
Fax: 886-29174598
‧
http://www.princeton.com.tw
‧
2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan
PT2312E
IMPORTANT NOTICE
Princeton Technology Corporation (PTC) reserves the right to make corrections, modifications, enhancements,
improvements, and other changes to its products and to discontinue any product without notice at any time.
PTC cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a PTC product. No
circuit patent licenses are implied.
Princeton Technology Corp.
2F, 233-1, Baociao Road,
Sindian, Taipei 23145, Taiwan
Tel: 886-2-66296288
Fax: 886-2-29174598
http://www.princeton.com.tw
PRE1.0
5
September 2009
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