NJM2702
3D SURROUND AUDIO PROCESSOR
s
GENERAL DESCRIPTION
The
NJM2702
is a 3D surround audio processor
regenerating the 3D surround sound with only two
speakers.
The
NJM2702
is suitable for audio applications, which are
speaker system for mini components, CD radio cassette,
multimedia speaker systems, TV and others.
s
PACKAGE OUTLINE
NJM2702D
s
FEATURES
q
Operating Voltage
(4.7 to 13V)
q
Stereo mode
•
Stable center image with natural sound field
•
High quality Surround
•
Free speaker interval
q
Surround control
q
Internal Mode Control Switch
q
Bipolar Technology
q
Package Outline
DIP14, DMP14, SSOP10
NJM2702M
NJM2702V
s
BLOCK DIAGRAM
LIN
+
+
LOUT
3D
FILTER
-
RIN
+
Bypass
ROUT
STE REO MODE
-1-
NJM2702
s
ABSOLUTE MAXIMUM RATING
(Ta=25°C)
PARAMETER
Supply Voltage
Power Dissipation
Operating Temperature Range
Storage Temperature Range
s
OPERATING VOLTAGE
PARAMETER
Operating
Voltage
SYMBOL
V+
TEST CONDITION
MIN.
4.7
TYP.
12.0
MAX.
13.0
UNIT
V
SYMBOL
V
+
RATINGS
14
(DIP14)
500
(DMP14) 350
(SSOP10) 250
-40 to +85
-40 to +125
UNIT
V
mW
°C
°C
P
D
T
opr
T
stg
-
s
ELECTRICAL CHARACTERISTICS
(V+=12V,Ta=25°C unless otherwise specified)
TEST CONDITION
PARAMETER
Operating
Current
SYMBOL
I
CC
No Signal
0
0
-
Stereo
MAX
3.0
6.0
9.0
INPUT
L
0
R
0
MIN.
OUTPUT
-
MODE
BYPASS
VR
-
3.0
6.0
9.0
mA
TYP.
MAX.
UNIT
qAC
CHARACTERISTICS
(V+=12V,Ta=25°C, V
IN
=-10dBV(316mVrms), f=1kHz,RL=4.7kΩ, unless otherwise specified)
TEST CONDITION
PARAMETER
Maximum
Input Voltage
SYMBOL
V
IM
INPUT
L
f=1kHz
T.H.D.=3%
f=100Hz
T.H.D.=3%
Output Noise
V
NO
Rg=0
Ω
A-Weighted
Rg=0
Ω
A-Weighted
Total
Harmonic
Distortion
T.H.D
f=1kHz
f=1kHz
Vin=-20dBV
Bypass Gain
G
VBYP
f=1kHz
V
IN
0
V
IN
0
0
R
0
V
IN
0
V
IN
0
MIN.
OUTPUT
L
R
L
R
L
R
L
R
L
R
L
R
L
R
MODE
VR
9.9
(3.1)
-3.8
(0.6)
-
11.9
(3.9)
-1.8
(0.8)
-112
(2.5)
-100
(10)
0.005
TYP.
MAX.
UNIT
BYPASS
-
-
dBV
(Vrms)
-
-106
(5.0)
-94
(20)
0.01
%
Stereo
MAX
BYPASS
-
dBV
(µVrms)
0
V
IN
0
V
IN
0
V
IN
0
0
0
V
IN
0
V
IN
0
V
IN
Stereo
MAX
-
BYPASS
-
-
Stereo
MAX
-
0.1
0.5
BYPASS
-
-1.0
0.0
1.0
dB
-2-
NJM2702
qAC
CHARACTERISTICS
(V+=12V,Ta=25°C, V
IN
=-10dBV(316mVrms), f=1kHz,RL=4.7kΩ, unless otherwise specified)
TEST CONDITION
PARAMETER
Surround Gain
SYMBOL
G
VSUR
INPUT
L
f=100Hz
Vin=-20dBV
f=100Hz
Vin=-20dBV
f=100Hz
Vin=-20dBV
V
IN
0
0
V
IN
V
IN
0
R
0
V
IN
V
IN
0
0
V
IN
MIN.
OUTPUT
L
R
L
R
L
R
MODE
VR
TYP.
MAX.
UNIT
Stereo
MAX
10.7
12.7
14.7
Stereo
MAX
8.4
10.4
12.4
dB
Stereo
MIN
3.6
5.6
7.6
q
CONTROL CHARACTERISTICS
(V+=12V,Ta=25°C unless otherwise specified)
TEST CONDITION
PARAMETER
SYMBOL
V
IN
=
High Level
V
IN
=
Low Level
INPUT
L
Mode Select
Control
Voltage
-
-
R
-
-
MIN.
OUTPUT
-
-
MODE
-
-
VR
-
-
2.0
0.0
-
-
V+
V
0.7
TYP.
MAX.
UNIT
V
MODE
s
MODE SWITCH
MODE
BYPASS
Stereo
SW
L
H
NOTES
Input Through
Surround Mode (Stereo Input)
-3-
NJM2702
s
TERMINAL DESCRIPTION
PIN NO.
SYMBOL
DIP14
DMP14
SSOP10
FUNCTION
EQUIVALENT CIRCUIT
VOLTAGE
V+
V+
31.6K
1
1
FIL
Filter Input
400
V+/2
2
4
8
10
-
NC
Test pin
V+
V+
V+
5K
3
2
VOL
Surround VR
V+/2
V+
V+
V+
5
3
VREFIN
Reference Voltage
Input
50k
V+/2
50k
-4-
NJM2702
PIN NO.
DIP14
DMP14
SSOP10
SYMBOL
FUNCTION
EQUIVALENT CIRCUIT
VOLTAGE
6
4
V+
Power Supply
V+
7
5
GND
GND
0V
V+
V+
V+
9
6
SW
Mode Control Switch
700
150k
0V
V+
V+
50
11
12
7
8
ROUT
LOUT
Rch Output
Lch Output
50
V+/2
-5-
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