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NJM2188
PRELI M I N ARY
Passive Matrix TruSurroundTM 3D Audio Processor
sGENERAL DESCRIPTION TM The NJM2188 is a Passive Matrix TruSurround 3D audio processor. It regenerates the full surround sound field directly from any kinds of surround encoded stereo input(Lt/Rt) signals. After the internal passive matrix circuit decodes Lt/Rt signal into 4 channel signals, the TruSurround virtualizer encodes them into 2 channel surround signals again. Accordingly any pre-processors decoding into 4 channel signals are not required. The NJM2188 also includes the SRS 3D-STEREO, and regenerates a 3D sound field from normal L/R input. The NJM2188 is suitable for TV, mini component, CD radio cassette, multimedia speaker system ,and others. sPACKAGE
NJM2188D
NJM2188M
NJM2188V
sFEATURES (4.7 to 13V) qOperating Voltage + (1.5Vrms typ. at V 11V) qMaximum Input Voltage (32Vrms typ. at TRU mode) qLow Output Noise qSRS 3D-STEREO FUNCTION (Two-grade Switch for 3D Effect) (THROUGH) qBYPASS FUNCTION qBipolar Technology DIP16, DMP16, SSOP16 qPackage Outline
The TruSurround technology right incorporated in the NJM2188 are owned by SRS Labs, a U.S. Corporation and licensed to New Japan Radio Co., Ltd. SRS is protected under U.S. and foreign patents issued and/or pending. TruSurround and the , are trademarks of SRS Labs, Inc. in the United States and selected foreign countries. Neither the purchase of the NJM2188, nor the corresponding sale of audio enhancement equipment conveys the right to sell commercialized recordings made with any TruSurround technology. SRS Labs requires that all users of the NJM2188 must enter into a license agreement directly with SRS Labs if the royalty is not included in the purchase price. SRS Labs also requires any users to comply with all rules and regulations as outlined in the SRS Trademark Usage Manual. For further information, please contact: SRS Labs., Inc. 2909 Daimler Street. Santa Ana, CA 92705 USA Tel:949-442-1070 Fax:949-852-1099 http://www.srslabs.com
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NJM2188
sBLOCK DIAGRAM
FIL1_OUT FIL1_IN2 FIL1_IN1 FIL1_IN3
51K 20K BYPASS TRU SW3 SW1
Lch in
50K 3.9K 1K 15K
150K 11K
Lch out
SRS 3D-1 VREF 12.5K 5K 6.18K 45K 37.5K TRU SW4 VREF SRS 3D1 SRS 3D-2
MIX
TRU (SRS 3D) BYPASS SW2 TRU (SRS 3D) V+
VREF VREF 20K
Rch out
Rch in
50K SW4 SW3 SW2 SW1
VREF 50K
VREF
50K
MIX
SRS 3D-2 50K
V+ VREF
VREF
VREF SW Control
50K VREF
GND
MODE1
MODE2
FIL2_OUT
FIL2_IN
sPIN CONFIGRATION
FIL2_IN2
No. 1
Symbol MODE1 MODE2 V+ VREF FIL2_OUT FIL2_IN FIL2_IN2 GND Rch OUT Lch OUT FIL1_IN3 FIL1_IN2 FIL1_IN1 FIL1_OUT Rch IN Lch IN
Function Mode Switch Mode Switch Supply Voltage 4.5V to 13V V+/2 OUTPUT Perspective Network_2 output Perspective Network_2 input Perspective Network_2 input2 Ground Rch OUTPUT Lch OUTPUT Perspective Network_1 INPUT3 Perspective Network_1 INPUT2 Perspective Network_1 INPUT1 Perspective Network_1 OUTPUT Rch INPUT Lch INPUT
MODE 1 MODE 2 V
+
1 2 3 4
16 15 14 13
Lch in Rch in FIL1_OUT FIL1_IN1 FIL1_IN2 FIL1_IN3 Lch out Rch out
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
VREF FIL2_OUT FIL2_IN FIL2_IN2 GND
NJM2188
5 6 7 8 12 11 10 9
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NJM2188
sABSOLUTE MAXIMUM RATING (Ta=25C)
PARAMETER Supply Voltage Power Dissipation Operating Temperature Range Storage Temperature Range SYMBOL + V PD Topr Tstg
+
RATING 15 (DIP16) 500 (DMP16) 300 (SSOP16) 300 -40 to +85 -40 to +125
UNIT V mW
C C
sELECTRICAL CHARACTERISTICS(V =12V,Ta=25C)
CONDITION PARAMETER Operating Voltage SYMBOL L V
+
IN R 0 0 0 0 VIN 0 0 VIN 0 0 VIN 0 0 VIN
OUT L
MODE BYPASS TRU SRS 3D-1 -
MIN
TYP
MAX
UNIT
0
4.7
12.0
13.0
V
Supply Current
Icc
No Signal
0 0
-
9.0
13.5
mA
Reference Voltage
VREF
V /2
+
VIN 0 VIN
5.5
6.0
6.5
V
f=1kHz THD=3%
BYPASS R L R L L R L L R L SRS3D-2 SRS3D-1 TRU
11.0 (3.55) 4.5 (1.67) 7.3 (2.32) 3.9 (1.57) 7.5 (2.37) 7.3 (2.32) 4.0 (1.58) 7.5 (2.37) 7.5 (2.37) 4.5 (1.68)
12.0 (3.98) 6.5 (2.11) 9.3 (2.92) 5.9 (1.97) 9.5 (3.0) 9.3 (2.92) 6.0 (2.0) 9.5 (3.0) 9.5 (3.0) 6.5 (2.11)
-
dBV (Vrms)
f=125Hz THD=3%
VIN VIN
Maximum Input Voltage
VINMAX f=125Hz THD=3%
VIN VIN VIN VIN f=125Hz THD=3% VIN VIN
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NJM2188
sELECTRICAL CHARACTERISTICS(V =12V,Ta=25C)
+
CONDITION PARAMETER SYMBOL L 0 0 Output Noise A- Weighting Rg=0 0 0 0 0 VIN 0 Total Harmonic Distortion THD f=1kHz VIN=-10dB VIN VIN VIN VIN Bypass Gain Passive Gain VIN GBypass2 f=1kz 0 GLt/Rt-L GLt/Rt-R f=1kHz f=1kHz VIN VIN VIN f=1kHz SRS 3D Gain GSRS3D VIN f=1kHz VIN 0 MODE Select Control Voltage VIN=High Level VMODE VIN=Low Level 0.0 0.7 0 0 VIN L R L SRS3D-2 -5.8 -21.1 -21.1 2.0 -3.8 -19.1 -19.1 -1.8 -17.1 -17.1 V
+
IN R 0 0 0 0 0 0 0 VIN 0 0 0 0 0 VIN 0 0 0 0 VIN
OUT L
MODE
MIN
TYP
MAX
UNIT
BYPASS R L TRU R L SRS3D-1 R L BYPASS R L TRU R L SRS3D-1 R L BYPASS R L TRU R L R L SRS3D-1
-
-110 (3.16)
-100 (10.0)
VNOISE
-
-90 (31.6)
-84 (63.1)
dBV (Vrms)
-
-90 (31.6) 0.01 0.01 0.10 0.20 0.10 0.20 0.0 0.0 2.2 -12.0 -2.8 -13.1 -13.1
-84 (63.1) % 1.0 dB 1.0 4.2 dB -10.0 -0.8 -11.1 -11.1 dB
-1.0 -1.0 0.2 -14.0 -4.8 -15.1 -15.1
VIN 0
dB
V
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NJM2188
sMODESELECT SWITCH
MODE BYPASS TRU SRS 3D-1 SRS 3D-2 MODE1 L L H H MODE2 L H L H NOTE INPUT THROUGH MODE Passive Matrix TruSurround SRS 3D STEREO MODE Space 100% Center 90% SRS 3D STEREO MODE Space 90% Center 70%
sAPPLICATION CIRCUIT
Lch in Rch in
VREF
0.01uF C10 10uF/50V C11 10uF/50V FIL1_IN1 C1 C2 0.22uF C4 C3 0.0047uF 0.22uF C8 10uF/50V C9 10uF/50V
Lch out Rch out
Lch out FIL2_IN2 56K R12 2M R10
33K 75K
FIL1_IN2
12V C13 V+
100uF/25V
NJM2188
FIL2_OUT MODE1 MODE2 VREF FIL2_IN GND GND 100uF /25V
C5 0.0047uF R13 R15
GND GND 1.8K R16 C12
V+
FIL1_OUT
H L H
R17 10K
R9
L
10K C14 10uF/50V
GND C15 10uF/50V
VREF
R11 51K C6
FIL1_IN3
GND GND GND
0.01uF
1.5K R14
C7 0.0047uF
VREF
VREF
VREF
PARTS NO. C1,C6 C2,C4 C3,C5,C7 C8,C9,C10,C11 C14,C15 C12,C13 R9 R10 R11
VALUE 0.01F 0.22F 0.0047F 10F 10F 100F 1.8k 2M 51k
Tolerance 5% 5% 5%
PARTS NO. R12 R13 R14 R15 R16,R17
VALUE 56k 33k 1.5k 75k 10k
Tolerance 5% 5% 5% 5% 5%
5% 5% 5%
Rch out
Lch in
Rch in
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NJM2188
sTYPICAL CHARACTERISTICS
FREQUENCY RESPONSE BYPASS MODE
+5 +10 +5
FREQUENCY RESPONSE TRU(Lt/Rt) MODE
+0
a, b
+0
a, c
-5 -10
Vout
(dBV) -15
Vout -10
(dBV)
-15 -20
-20
b, d
-25
-25
-30 20
50
100
200
500
1k
2k
5k
10k
20k
-30 20
50
100
200
500
1k
2k
5k
10k
20k
f(Hz)
a: Vin = 0dBV Lch Vout = Lch b: Vin = 0dBV Rch Vout = Rch V+=12V, 0dB V = 1Vrms
f(Hz)
a: Vin = 0dBV Lch Vout = Lch b: Vin = 0dBV Lch Vout = Rch c: Vin = 0dBV Rch Vout = Rch d: Vin = 0dBV Rch Vout = Lch + V =12V, 0dBV = 1Vrms
FREQUENCY RESPONSE SRS 3D-1 MODE
+10 +5 +10 +5
FREQUENCY RESPONSE SRS 3D-2 MODE
+0
+0
-5
-5
Vout
(dBV)
a, c
-10
Vout
(dBV)
-10
a, c
-15
-15
-20
b, d
-20
b, d
-25 -25
-30 20
50
100
200
500
1k
2k
5k
10k
20k
-30 20
50
100
200
500
1k
2k
5k
10k
20k
f(Hz)
a: Vin = 0dBV Lch Vout = Lch b: Vin = 0dBV Lch Vout = Rch c: Vin = 0dBV Rch Vout = Rch d: Vin = 0dBV Rch Vout = Lch V+=12V, 0dBV = 1Vrms
f(Hz)
a: Vin = 0dBV Lch Vout = Lch b: Vin = 0dBV Lch Vout = Rch c: Vin = 0dBV Rch Vout = Rch d: Vin = 0dBV Rch Vout = Lch + V =12V, 0dBV = 1Vrms
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NJM2188
TOTAL HARMONIC DISTORTION vs. INPUT VOLTAGE BYPASS MODE
5 2 1 0.5 0.2 0.1 0.05 1 0.5 2 10 5
TOTAL HARMONIC DISTORTION vs. INPUT VOLTAGE TRU MODE
THD(%)
0.02 0.01 0.005 0.002 0.001
THD(%)
0.2
a
a, b
0.1 0.05
b
0.0005 0.02 0.0002 0.0001 -30 -25 -20 -15 -10 -5 +0 +5 +10 +15 0.01 -30 -25 -20 -15 -10 -5 +0 +5 +10 +15
INPUT LEVEL(dBV) Lch Vout = Lch Lch Vout = Rch
INPUT LEVEL(dBV) a: Vin = 1kHz b: Vin = 1kHz + V =12V Lch Vout = Lch Lch Vout = Rch
a: Vin = 1kHz b: Vin = 1kHz + V =12V
TOTAL HARMONIC DISTORTION vs. INPUT VOLTAGE SRS 3D-1 MODE
10 5 10 5
TOTAL HARMONIC DISTORTION vs. INPUT VOLTAGE SRS 3D-2 MODE
2 1 0.5
2 1 0.5
THD(%)
0.2 0.1
a
THD(%)
0.2 0.1 0.05
b
b
0.05
a
0.02 0.01 -30
0.02 0.01 -30
-25
-20
-15
-10
-5
+0
+5
+10
+15
-25
-20
-15
-10
-5
+0
+5
+10
+15
INPUT LEVEL(dBV) a: Vin = 1kHz b: Vin = 1kHz + V =12V Lch Vout = Lch Lch Vout = Rch a: Vin = 1kHz b: Vin = 1kHz + V =12V
INPUT LEVEL(dBV) Lch Vout = Lch Lch Vout = Rch
[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.
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