Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
3D Effect Audio Processor IC
PT2387
DESCRIPTION
PT2387 is a 3D Effect Audio Processor IC utilizing CMOS Technology. It features a specially designed
PTC HRTFs Filter and space-enhanced circuit, thereby, guaranteeing excellent audio quality and
performance. Least external components, excellent 3D effect audio output, built-in LED display driver
add to the enhanced quality of PT2387. Pin assignments and application circuit are optimized for easy
PCB Layout and cost saving benefits.
FEATURES
•
•
•
•
•
•
•
CMOS technology
Operating voltage range: 5V to 9 V
THD=N<0.01%, S/N>95dB
Specially designed PTC HRTFs filter technology and 3D space-enhanced circuit
Least external components
Built-in LED display driver
Available in 8 Pins, DIP or SOP
APPLICATIONS
•
•
•
•
•
•
•
•
Multi-media audio
Car audio
Walkman
Home stereo
TV
PC speakers
Notebook Computer/Laptop
Other audio equipment
PT2387 V1.4
-1-
March, 2006
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
3D Effect Audio Processor IC
PT2387
BLOCK DIAGRAM
B y P as s Sw 1
To 3D C ont rol
R IN
-1
PTC 'HRTFs
-1
3 D R O UT
LIN
+1
PTC 'HRTFs
3D LO U T
B y P as s Sw 2
3D Con trol
PT2387 V1.4
-2-
March, 2006
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
3D Effect Audio Processor IC
PT2387
PIN CONFIGURATION
VRE F
GND
3D
ROUT
1
2
8
7
VCC
LOUT
LIN
RIN
PT238 7
3
4
6
5
PIN DESCRIPTION
Pin Name
VREF
GND
3D
ROUT
RIN
LIN
LOUT
VCC
I/O
O
-
I
O
I
I
O
-
Description
1/2 VCC
Connect capacitor to GND
Ground Pin
3D Effect Control Pin
Right Channel Output Pin
Right Channel Input Pin
Left Channel Input Pin
Left Channel Output Pin
Positive Power Supply
Pin No.
1
2
3
4
5
6
7
8
PT2387 V1.4
-3-
March, 2006
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
3D Effect Audio Processor IC
PT2387
FUNCTION DESCRIPTION
The 3D effect of PT2387 is controlled by Pin No.3 (3D pin) via a TACT Switch which is triggered when
connected to Vcc (“High”). Please refer to the diagram below.
Power
On
By
Pass
3D
Surround
Trigger On/Off
Cycle
Press 3D key
LED DISPLAY DRIVER
PT2387 has a built-in LED driver which is used to display the 3D activity status. Please refer to the
table below.
3D/Surround Effect OFF
LED Display OFF
3D/Surround Effect ON
LED Display ON
PT2387 V1.4
-4-
March, 2006
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
3D Effect Audio Processor IC
PT2387
ABSOLUTE MAXIMUM RATING
Parameter
Positive power supply
Input voltage
Operating temperature
Storage temperature
Symbol
V
CC
Vi
Topr
Tstg
Ratings
12
0.3 to V
CC
+0.3
-40 ~ +85
-65 ~ +150
Unit
V
V
℃
℃
DC ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, V
CC
=9V, Vi=1Vrms, f=1KHz, Ta=27
℃
)
Parameter
Symbol
Condition
Min.
Operating voltage
V
CC
5
Vcc=9V, Vi=0V,
Operating current
I
CC
-
Bypass Mode
Maximum output voltage
V
OM
Vcc=9V
-
Vcc=9V, Vi=0V,
Output noise voltage
V
ON
BW=20 to 20KHz,
-
A-weighting
Vcc=9V,
Vi=0.2Vrms,
Total harmonic distortion
THD
-
BW=20 to 20KHz,
Bypass Mode
Input impedance
R
IN
Vcc=9V
-
Output impedance
R
OUT
Vcc=9V
-
High level input voltage
V
IN
Vcc=9V
-
Low level input voltage
V
IL
Vcc=9V
0.3VCC
Vcc=9V,
Maximum input voltage
V
IMAX
-
Bypass Mode
Typ.
9
20
-
-90
Max.
10
-
2.5
-
Unit
V
mA
Vrms
dB
-
100
40
-
-
-
0.05
-
80
0.7V
CC
-
2.0
%
KΩ
Ω
V
V
Vrms
PT2387 V1.4
-5-
March, 2006
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