PT2348
4.1-Channel Audio Processor with Subwoofer
DESCRIPTION
The PT2348 is a 4.1CH audio processor designed for
Car Audio purpose. Using I
2
C interface controls all of
the functions. Like most of audio processors, it equips
up to 4 stereo sources input with adjustable gain,
master volume with adaptive loudness, treble and
bass tone control.
In a car entertainment system where needs front and
rear seat individual control, the PT2348 provides
separate input source selection and output volume
adjustment; a special design, mixing amp, is very easy
to combine the navigation system or cellular phone’s
voice with the car audio system.
APPLICATION
•
Car Audio
•
Controlled by I
2
C Interface
•
4 Stereo Inputs (including 1 quasi-differential input)
with selectable input gain
•
2 Channels Electronic Volume： +15 to -79dB with
1dB/step
•
1 Subwoofer Output: +15 to -79dB with 1dB/step
•
Adjustable crossover frequency for Subwoofer
•
Tone Control (Bass and Treble): -15 to +15dB,
1dB/step
•
Input Gain Control: 0 to +15dB, 1dB/step
•
Loudness: 0 to -15dB, 1dB/step
•
4 independent speaker outputs: +15 to -79dB with
1dB/step & independent programmable mix input
with 50% mixing ratio for front speakers
•
Low Distortion and Low Noise
•
36-pin SSOP package
FEATURES
BLOCK DIAGRAM
Tel: 886-66296288
‧
Fax: 886-29174598
‧
http://www.princeton.com.tw
‧
2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan
PT2348
PIN DESCRIPTION
Pin Name
SE3R
SE2R
SE1R
SE1L
SE2L
SE3L
DIFFL
DIFFG
DIFFR
IGL
VOL
LDL
IGR
VOR
LDR
BL1
BL2
TRL
TRR
BR2
BR1
SOUT
SIN
C2
C1P
OUTSW
OUTRF
OUTRR
OUTLR
OUTLF
MIX/OUTSW
VDD
CREF
GND
SDA
SCL
I/O
I
I
I
I
I
I
I
I
I
O
I
I
O
I
I
I
O
I
I
O
I
O
I
I
I
O
O
O
O
O
I/O
-
I
-
I
I
Description
Single-ended Right Channel Input 3
Single-ended Right Channel Input 2
Single-ended Right Channel Input 1
Single-ended Left Channel Input 1
Single-ended Left Channel Input 2
Single-ended Left Channel Input 3
Pseudo Differential Stereo Input Left
Pseudo Differential Stereo Input Common
Pseudo Differential Stereo Input Right
Left Channel Input Selector Output
Left Channel Volume Input
Left Channel Loudness Input
Right Channel Input Selector Output
Right Channel Volume Input
Right Channel Loudness Input
Left Channel Bass Cap 1
Left Channel Bass Cap 2
Left Channel Treble Cap
Right Channel Treble Cap
Right Channel Bass Cap 2
Right Channel Bass Cap 1
R + L Output (-6db Gain)
Subwoofer Filter Input
Subwoofer Filter Cap 2
Subwoofer Filter Cap 1
Subwoofer Output
Right Front Output
Right Rear Output
Left Rear Output
Left Front Output
Mix input / Subwoofer output
Supply Voltage
Analog Reference Voltage (1/2 VDD)
Ground
SDA INPUT
SCL INPUT
Pin No.
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
29
30
31
32
33
34
35
36
V1.0
4
February 2010
PT2348
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
V1.0
5
February 2010
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