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 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
sABSOLUTE MAXIMUM RATING (Ta=25C) PARAMETER Supply Voltage Power Dissipation Operating Temperature Range Storage Temperature Range sOPERATING 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
PD Topr Tstg
-
sELECTRICAL CHARACTERISTICS (V+=12V,Ta=25C unless otherwise specified)
TEST CONDITION PARAMETER Operating Current SYMBOL ICC 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=25C, VIN=-10dBV(316mVrms), f=1kHz,RL=4.7k, unless otherwise specified)
TEST CONDITION PARAMETER Maximum Input Voltage SYMBOL VIM INPUT L f=1kHz T.H.D.=3% f=100Hz T.H.D.=3% Output Noise VNO Rg=0 A-Weighted Rg=0 A-Weighted Total Harmonic Distortion T.H.D f=1kHz f=1kHz Vin=-20dBV Bypass Gain GVBYP f=1kHz VIN 0 VIN 0 0 R 0 VIN 0 VIN 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 (Vrms)
0 VIN 0 VIN 0 VIN 0
0 0 VIN 0 VIN 0 VIN
Stereo
MAX
-
BYPASS
-
-
Stereo
MAX
-
0.1
0.5
BYPASS
-
-1.0
0.0
1.0
dB
-2-
NJM2702
qAC CHARACTERISTICS (V+=12V,Ta=25C, VIN=-10dBV(316mVrms), f=1kHz,RL=4.7k, unless otherwise specified)
TEST CONDITION PARAMETER Surround Gain SYMBOL GVSUR INPUT L f=100Hz Vin=-20dBV f=100Hz Vin=-20dBV f=100Hz Vin=-20dBV VIN 0 0 VIN VIN 0 R 0 VIN VIN 0 0 VIN 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
qCONTROL CHARACTERISTICS (V+=12V,Ta=25C unless otherwise specified)
TEST CONDITION PARAMETER SYMBOL VIN= High Level VIN= Low Level INPUT L Mode Select Control Voltage R MIN. OUTPUT MODE VR 2.0 0.0 V+ V 0.7 TYP. MAX. UNIT
VMODE
sMODE SWITCH MODE BYPASS Stereo
SW L H
NOTES Input Through Surround Mode (Stereo Input)
-3-
NJM2702
sTERMINAL 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-
NJM2702
PIN NO.
DIP14 DMP14 SSOP10
SYMBOL
FUNCTION
EQUIVALENT CIRCUIT
V+ V+ V+
VOLTAGE
13 14
9 10
RIN LIN
Rch Input Lch Input
V+/2
700 50k VREF
-6-
C1 FIL 13 NC LIN LOUT ROUT 10uF/50V 10 5 VREFIN 9 V+ 8 GND NC SW NC R1 C5 10uF/50V 10K 10uF/50V C6 11 10uF/50V C7 Lch Output Rch Output 12 Rch Input VOL NC 10uF/50V C8 LIN C9 Lch Input 14 1 0.0047uF 2
Surround VR Max Min 3 50KB
sAPPLICATION CIRCUIT
Parts No. R1 C1 C2,C5,C6,C7,C8,C9
4 C2 10uF/50V C3 1uF/50V 6 12V 7 C4 100uF/16V
C1 1 FIL VOL 2 3 VREFIN 4 V+ 12V 6 5 GND C4 100uF/16V SW LIN RIN LOUT ROUT 0.0047uF Min Max 50K C3 1uF/50V 7
Value 10k 0.0047F 10F
10
Tolerance 5% 5% 20% Parts No.
Surround VR C2 10uF/50V
C3 C4
C9 10uF/50V C8 9 8 10uF/50V C7 10uF/50V C6
Lch Input Rch Input Lch Output Rch Output R1 10uF/50V C5 10K 10uF/50V
Value 1F 100F
Tolerance 20% 20%
NJM2702
-7-
NJM2702
sTYPICAL CHARACTERISTICS
Supply Current vs Supply Voltage
V+=1 to 18V Ta=25degrees
7
Supply Current vs Ambient Temperature
V+=12V
6
STEREO
6
BYPASS 5.5
Supply Current [mA]
4
STEREO BYPASS
Supply current [mA]
5
5
3
2
4.5
1
0 0 5 10 15 20
4 -60 -40 -20 0 20 40 60 80 100
Supply Voltage [V]
Ambient Temperature [degrees]
Maximum Input Voltage vs Supply Voltage (BYPASS)
Vin=Lch Vout=Lch f=1KHz RL=47Kohm Rg=25ohm Ta=25degrees
15 5
Maximum Input Voltage vs Supply Voltage (STEREO)
Vin=Lch Vout=Lch f=100Hz RL=47Kohm Rg=25ohm Ta=25degrees
0
Maximum Input Voltage [dBV]
10
Maximum Input Voltage [dBV]
-5
5
-10
0
-15
-5 2 4 6 8 10 12 14
-20 2 4 6 8 10 12 14
Supply Voltage [V]
Supply Voltage [V]
Output Noise vs Ambient Temperature
V+=12V Vin=GND Vout=Lch
-90 -90
Output Noise vs Ambient Temperature
V+=12V Vin=GND Vout=Rch
-95
STEREO
-95
STEREO
Output Noise [dBV]
-105 BYPASS -110
Output Noise [dBV]
-100
-100
-105 BYPASS -110
-115
-115
-120 -60
-40
-20
0
20
40
60
80
100
-120 -60
-40
-20
0
20
40
60
80
100
Ambient Temperature [degrees]
Ambient Temperature [deg]
-8-
NJM2702
sTYPICAL CHARACTERISTICS
Total Harmonic Distortion vs Input Voltage (BYPASS)
V+=12V f=100Hz RL=47Kohm Rg=25ohm BW=10 to 80KHz
10 10
Total Harmonic Distortion vs Input Voltage (BYPASS)
V+=12V f=1KHz RL=47Kohm Rg=25ohm BW=10 to 80KHz
1
1
Ta=25deg 0.1 Ta=-40deg
THD+N [%]
THD+N [%]
Ta=85deg
Ta=85deg 0.1 Ta=25deg Ta=-40deg
0.01
0.01
0.001 -50
-40
-30
-20
-10
0
10
20
0.001 -50
-40
-30
-20
-10
0
10
20
Input Voltage [dBV]
Input Voltage [dBV]
Total Harmonic Distortion vs Input Voltage (STEREO)
V+=12V f=100Hz RL=47Kohm Rg=25ohm BW=10 to 80KHz
10 10
Total Harmonic Distortion vs Input Voltage (STEREO)
V+=12V f=1KHz RL=47Kohm Rg=25ohm BW=10 to 80KHz
1
1
THD+N [%]
THD+N [%]
Ta=85deg Ta=25deg Ta=-40deg 0.1
Ta=85deg Ta=25deg Ta=-40deg 0.1
0.01 -50
-40
-30
-20
-10
0
10
0.01 -50
-40
-30
-20
-10
0
10
Input Voltage [dBV]
Input Voltage [dBV]
Voltage Gain vs Frequency Response (BYPASS)
3
Voltage Gain vs Frequency Response (BYPASS)
V+=12V Vin=-10dBV Rch Vout=Rch RL=47Kohm Rg=25ohm
3
V+=12V Vin=-10dBV Lch Vout=Lch RL=47Kohm Rg=25ohm
2
2
Ta=-40deg Ta=25deg Ta=85deg 0
Ta=-40deg
Voltage Gain [dB]
Voltage Gain [dB]
1
1 Ta=25deg Ta=85deg 0
-1
-1
-2
-2
-3 10 100 1000
104
105
-3 10 100 1000 104 105
Frequency [Hz]
Frequency [Hz]
-9-
NJM2702
sTYPICAL CHARACTERISTICS
Voltage Gain vs Frequency Response (STEREO)
V+=12V Vin=-20dBV Lch Vout=Lch RL=47Kohm Rg=25ohm
14
15
Voltage Gain vs Frequency Response (STEREO)
V+=12V Vin=-20dBV Lch Vout=Rch RL=47Kohm Rg=25ohm
12 Ta=-40deg 10 Ta=25deg
10 Ta=-40deg. 5 Ta=25deg. Ta=85deg. 0
8
Ta=85deg
6
Input Voltage [dB]
Voltage Gain [dB]
-5
4
-10
2
-15
0
-2 10 100 1000 10
4
-20
10
5
10
100
1000
10 4
10 5
Frequency [Hz]
Frequency [Hz]
Voltage Gain vs SW Control Voltage
V+=12V Vin=-10dBV Lch f=100Hz Vout=Lch BYPASS --> STEREO
6.1 14
DC Offset Voltage vs Ambient Temperature
V+=12V Vout=Lch
12 Ta=85deg. Ta=25deg. 8 Ta=-40deg. 6 6.05 BYPASS STEREO
DC Offset Voltage [V]
10
Voltage Gain [dB]
6
4
2
5.95
0
-2 0 0.5 1 1.5 2 2.5
5.9 -60
-40
-20
0
20
40
60
80
100
Control Voltage [V]
Ambient Temperature [degrees]
DC Offset Voltage vs Ambient Temperature
V+=12V Vout=Rch
6.1
6.05
BYPASS
STEREO
DC Offset Voltage [V]
6
5.95
5.9 -60
[CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights.
-40 -20 0 20 40 60 80 100
Ambient Temperature [degrees]
- 10 -


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