PT2314E
Stereo Audio Processor for Home/TV Audio
Tel: 886-2-66296288
‧
Fax: 886-2-29174598
‧
http://www.princeton.com.tw
‧
2F, 233-1, Baociao Rd., Sindian Dist., New Taipei City 23145, Taiwan
DESCRIPTION
The PT2314E is an audio processor designed for
versatile application, includes 4 stereo input selector
with adjustable gain, master volume control with low
frequency loudness compensation, speaker output
attenuator and tone control. It is a good solution for the
home audio signal processing.
Due to the high reliability requirement from the audio
business, the PT2314E improves both audio
performances and input surge current capability, these
causes the PT2314E is the best solution for the
cost-effective audio systems.
APPLICATIONS
ï‚· Flat Panel TV
ï‚· Home Audio System
ï‚· Powered Speaker System
FEATURES
ï‚· 4 stereo inputs with gain selection, range from 0dB
to +11.25dB in 3.75dB/step
ï‚· Master volume from 0 dB to -78.75dB in
1.25dB/step
ï‚· Speaker attenuator for balance, range from 0dB to
-38.75dB in 1.25dB/step
ï‚· Each channel output can be muted individually.
ï‚· Low frequency loudness compensation
ï‚· Bass and Treble control, range from -14dB to
+14dB in 2dB/step
ï‚· Wide operation range (VDD=4V to 10V)
ï‚· Low harmonic distortion, low noise
ï‚· Improved and replace PT2314 and PT2314A
APPLICATION CIRCUIT
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
28REFVDD
AGND
TREB_L
TREB_R
RIN
ROUT
LOUD_R
RIN3
RIN2
RIN1
LOUD_L
LIN3 LIN2
LIN1
LIN
LOUT
BOUT _L
BIN_L
BIN_R
BOUT _R
OUT_R
OUT_L
RIN4
LIN4
DGND
SDA
SC L
2.2uF
2.2uF
22uF
VDD
2.7n
2.7n
100n
100n
100n
100n
100n
100n
5.6K
5.6K
Fr ont Left
Fr ont Ri ght
10uF
10uF
Power
Amplifier
MCU
PT2314E
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
Inpu t Surge
Protection
2.2uF
2.2uF
AUDIO 4
2.2K
2.2K
L
R
PT2314E
V1.0 2 January 2010
BLOCK DIAGRAM
LOUDNESS
LIN
LOUD_L
REF
BOUT_L
BIN_L
TREB_L
TREBLE
BASS
OUT_L
REF REF
LOUDNESS
REF
TREBLE
BASS
OUT_R
TREB_R
BOUT_R
LOUD_R
RIN
VDD
REF
AGND
REF
SCL
SDA
DGND
I2C
DECODER
BIAS
BIN_R
LIN4
LIN3
LIN2
LIN1
REF
RIN1
RIN2
RIN3
RIN4
REF
LOUT
ROUT
Speaker Attenuator
With Mute
Input SW and
G
AIN
INT
R
e
f
Loud
S
W
Master
Volume