PT2347 [PTC]
Stereo Audio Processor; 立体声音频处理器
| 型号： | PT2347 |
| 厂家： | 
PRINCETON TECHNOLOGY CORP |
| 描述： | Stereo Audio Processor |
| 文件： | 总3页 (文件大小：209K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Preliminary
PT2347
Stereo Audio Processor
DESCRIPTION
FEATURES
The PT2347 is an audio processor designed for
versatile application, it adopts all of functions from
successful predecessor- the PT2313L, and it includes
3 stereo input selector with adjustable gain, master
volume control with low frequency loudness
compensation, individual output attenuator and tone
control.
•
•
Controlled by I²C interface
Direct replace the PT2313L with +10dB output
gain
•
•
•
3 stereo inputs with gain selection, range from 0dB
to +11.25dB in 3.75dB/step
Master volume from 0dB to -78.75dB in
1.25dB/step
Speaker attenuator for balance and fader, range
from 0dB to -38.75dB in 1.25dB/step
Each output can be muted individually.
Low frequency loudness compensation
Bass and Treble control, range from -14dB to
+14dB in 2dB/step
In car audio applications, maximum power output of
the audio set is measurement on saturated condition, it
may not achieve the goal if power amplifier does not
have enough gain, therefore, the PT2347 provides
extra +10dB voltage gain in final output stage, it is
easy to drive the power amplifier into saturated power
and eliminates external gain OPAMP.
•
•
•
•
•
Wide operation range (VDD = 4V to 10V)
Low harmonic distortion Low noise
APPLICATIONS
•
•
•
Car audio
Home audio system
Powered speaker system
BLOCK DIAGRAM
Speaker Attenuator
With Mute
RROUT
LROUT
REF
REF
REF
REF
+10dB GAIN
+10dB GAIN
RFOUT
LFOUT
TREB_R
TREBLE
TREB_L
TREBLE
BASS
Master
Volume
BIN_L
BIN_R
BASS
BOUT_R
BOUT_L
Loud
SW
REF
REF
LOUD_R
LOUD_L
LOUDNESS
LOUDNESS
RIN
LIN
LOUT
LIN1
LIN2
LIN3
ROUT
Input SW and
GAIN
Input SW and
GAIN
RIN1
RIN2
RIN3
REF
REF
VDD
REF
SCL
I2C
DECODER
SDA
BIAS
REF
DGND
AGND
Tel: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan
PT2347
APPLICATION CIRCUIT DIAGRAM
PT2347
22uF
1
2
3
4
5
6
7
8
9
REF
SCL 28
SDA 27
VDD
VDD
AGND
DGND 26
LFOUT 25
RFOUT 24
LROUT 23
RROUT 22
BOUT_R 21
BIN_R 20
BOUT_L 19
BIN_L 18
LOUT 17
TREB_L
TREB_R
RIN
10uF
10uF
10uF
10uF
27n
Front Left
Front Right
Rear Left
27n
Input Surge
Protection
2.2uF
ROUT
L
LOUD_R
RIN3
2.2uF
2.2uF
2.2K
2.2K
AUDIO 3
100n
100n
100n
R
5.6K
5.6K
100n
100n
100n
2.2uF
10 RIN2
11 RIN1
12 LOUD_L
13 LIN3
14 LIN2
L
2.2uF
2.2uF
2.2K
2.2K
AUDIO 2
R
Rear Right
Power
Amplifier
LIN 16
L
2.2uF
2.2uF
2.2K
2.2K
AUDIO 1
LIN1 15
R
PRE1.0
2
PT2347
ORDER INFORMATION
Valid Part Number
Package Type
Top Code
PT2347-S
28 Pins, SOP, 300mil
PT2347-S
PIN CONFIGURATION
PIN DESCRIPTION
Pin Name
REF
I/O
-
Description
Analog reference voltage (1/2VDD)
Supply input voltage
Pin No.
1
2
VDD
-
AGND
TREB_L
TREB_R
RIN
ROUT
LOUD_R
RIN3
-
I
I
I
O
I
I
Analog ground
3
4
5
6
7
8
9
Left channel input for treble controller
Right channel input for treble controller
Right channel volume controller input
Right channel Input selector output
Right channel loudness input
Right channel input 3
RIN2
RIN1
LOUD_L
LIN3
LIN2
I
I
I
I
I
I
I
O
I
Right channel input 2
Right channel input 1
Left channel loudness input
Left channel input 3
Left channel input 2
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
LIN1
LIN
Left channel input 1
Left channel volume controller input
Left channel Input selector output
Left channel input for bass controller
Left channel output for bass controller
Right channel input for bass controller
Right channel output for bass controller
Right rear speaker output
Left rear speaker output
LOUT
BIN_L
BOUT_L
BIN_R
BOUT_R
RROUT
LROUT
RFOUT
LFOUT
DGND
SDA
O
I
O
O
O
O
O
-
Right front speaker output
Left front speaker output
Digital ground
I
I
I2C data input
SCL
I2C clock input
PRE1.0
3
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