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NJM2191
PRERMINARY
SRS 3D Stereo & SRS HEADPHONE AUDIO PROCESSOR
sGENERAL DISCRIPTION The NJM2191 is a SRS 3D Stereo and SRS HEADPHONE audio processor. The 3D Stereo regenerates 3D surround sound with only two speakers, and also the SRS HEADPHONE provides a realistic and spacious listening experience through standard headphones. The NJM2191 is suitable for mini component, CD radio cassette, multimedia speaker system for PC and others. sPACKAGE OUTLINE
sFEATURES q Operating Voltage q Low Operating Current
NJM2191L
4.7 to 13V 10.0 mA typ. at 3D Stereo Mode 11.0mA typ. at SRS HP Mode q Low Output Noise 17.8Vrms typ.at 3D Stereo Mode 17.8Vrms typ at SRS HP Mode q Bypass Gain 0dB typ. q Sound Field Adjustment by Width Volume q Internal Mode Switch 3D Stereo / SRS HP q Bipolar Technology q Package Outline SDIP30, SDMP30
NJM2191M
The SRS 3D Stereo and HEDPHONE technology right incorporated in the NJM2191 are owned by SRS Labs, a U.S. Corporation and licensed to New Japan Radio Co., Ltd. SRS 3D Stereo and HEDPHONE is protected under U.S. and foreign patents issued and/or pending. SRS 3D Stereo and HEDPHONE and the , are trademarks of SRS Labs, Inc. in the United States and selected foreign countries. Neither the purchase of the NJM2191, nor the corresponding sale of audio enhancement equipment conveys the right to sell commercialized recordings made with any SRS technology. SRS Labs requires that all users of the NJM2191 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
- 1 -A
NJM2191
sABSOLUTE MAXIMUM (Ta=25C)
PARAMETER Operating Voltage Power Dissipation Operating Temperature Range Storage Temperature Range SYMBOL V
+
RATINGS 15 700 -40 to +85 -40 to +125
UNIT V mW C C
PD TOPR Tstg
sELECTRICAL CHARACTERISTICS (V+=12V, Ta=25C, VIN=-10dBV(316mVrms), unless otherwise specification)
CONDITION PARAMETER Operating Voltage SYMBOL INPUT L V
+
R 0 0 0 0 0 VIN VIN VIN -VIN VIN -VIN
OUTPUT L R L R L R L L L R L L
MODE BYPASS 3D Stereo SRS HP 3D Stereo SRS HP BYPASS 3D Stereo BYPASS SRS HP 3D Stereo 3D Stereo 3D Stereo SRS HP SRS HP SRS HP
WIDTH VR MAX MAX MAX MAX MAX MAX MAX MAX MAX
MIN
TYP
MAX
UNIT
-
0
4.7 5.0 6.0 7.0 8.0 5.8 11.0 (3.5) 11.0 (3.5) -1.3 (0.9) 10.0 (3.2) -7.1 (0.4) -6.1 (0.5) 9.9 (3.1) -12.1 (0.2)
12.0 9.0 10.0 11.0 12.0 6.0 12.0 (4.0) 12.0 (4.0) 0.7 (1.1) 12.0 (4.0) -5.1 (0.6) -4.1 (0.6) 11.9 (3.9) -10.1 (0.3)
13.0 13.0 14.0
V
Operating Current
0 ICC No Signal 0 0
mA 15.0 16.0 6.2 V
Reference Voltage
VREF
V /2 f=1kHz T.H.D.=3% f=1kHz T.H.D.=3% f=125kHz T.H.D.=3%
+
0 VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN
Maximum Input Voltage
VIM
f=125kHz T.H.D.=3% f=125kHz T.H.D.=3% f=100Hz T.H.D.=3% f=100Hz T.H.D.=3% f=100Hz T.H.D.=3%
dBV (Vrms)
-2-
NJM2191
sELECTRICAL CHARACTERISTICS (V+=12V, Ta=25C, VIN=-10dBV(316mVrms), unless otherwise specification)
CONDITION PARAMETER SYMBOL INPUT L 0 0 Output Noise VNOISE Rg=0 A-Weighted 0 0 0 VIN VIN Total Harmonic Distortion THD f=1kHz VIN VIN VIN VIN VIN VIN 3D Stereo Gain GVSRS f=125Hz VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN R 0 0 0 0 0 VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN -VIN -VIN -VIN -VIN OUTPUT L R L R L R L R L R L R L R L R L R L R L R L R L R L R L R L R L R L R L R MODE BYPASS 3D Stereo 3D Stereo BYPASS SRS HP SRS HP SRS HP BYPASS 3D Stereo 3D Stereo 3D Stereo BYPASS SRS HP SRS HP SRS HP SRS HP BYPASS 3D Stereo BYPASS SRS HP 3D Stereo 3D Stereo 3D Stereo SRS HP SRS HP SRS HP SRS HP WIDTH VR MAX MIN MAX MAX MAX MIN MAX MAX MAX MIN MAX MIN MAX MIN MAX MIN TYP -110 (3.2) -95 (17.8) -110 (3.16) -95 (17.8) -95 (17.8) 0.01 0.10 0.10 0.01 0.10 0.01 0.20 0.0 0.0 11.2 -0.5 8.5 0.0 0.0 5.3 20.9 MAX -100 (10.0) -84 (63.1) -100 (10.0) -84 (63.1) -84 (63.1) 0.05 0.20 0.20 0.05 0.30 0.10 0.40 1.0 dB -1.0 9.2 -2.5 6.5 -2.0 -2.0 3.3 18.9 2.0 0.0 1.0 13.2 1.5 10.5 2.0 dB 2.0 7.3 dB 22.9 V
+
UNIT
-1.0
dBV (uVrms)
%
Bypass Gain
GVBYP
f=1kHz
dB
L+R Gain
GL+R
Vin=-20dBV f=100Hz
L-R Gain
GL-R
Vin=-20dBV f=100Hz VIN = "High Level" VIN = "Low Level"
Mode Select Control Switch
VMODE
V 0.7
The word "-VIN" signifies opposite phase of "VIN"
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NJM2191
sMODE SWITCH
3D Stereo SW BYPASS 3D Stereo Low Level High Level
SRS-HP SW BYPASS SRS HP Low Level High Level
sPIN CONFIGURATION
30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
NJM2191
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
No 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
SYMBOL HPLin HPRin VOL1 VOL2 FIL1 FIL2 FIL3 FIL4 NC HPLout HPRout NC NC NC NC
FUNCTION Lch Input for SRS HP Rch Input for SRS HP Width Control Output for SRS HP Width Control Input for SRS HP Filter1 Filter2 Filter3 Filter4 NC Lch Output for SRS HP Rch Output for SRS HP NC NC NC NC
No. 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
SYMBOL V+ GND 3D Stereo SW SRS HP SW Rch out Lch out VREFOUT VOL4 VOL3 VREFIN FIL7 FIL6 FIL5 Rch in Lch in
FUNCTION 4.7 to 13V GROUND 3D Stereo Mode Switch SRS HP Mode Switch Rch Output Lch Output Reference Voltage Input Width Control Input for SRS Stereo Width Control Output for SRS Stereo Reference Voltage Output Filter6 Filter7 Filter8 Rch Input Lch Input
-4-
NJM2191
28 27 26 24 VOL3 23 VOL4 FIL5 FIL6 FIL7
sBLOCK DIAGRAM
BYPASS 21 Lch out
Lch in 30 SW1 3D Stereo BYPASS
VREF Rch in 29
+
MIX
20 Rch out
MIX
VREF
SW2 3D Stereo
V+ 50k SW 4
16 V+
3D Stereo SW 18 SW Control
SW 3 SW2 SW 1 VREF VREF GND BYPASS 50k
25 VREF IN
SRS HP SW 19
17 GND 22 VREF
HPLin 1 + SW3 SRS HP BYPASS
10 HPLout
VREF HPRin 2
-
MIX
11 HPRout
MIX
VREF
SW4 SRS HP
3 VOL1
4 VOL2
5 FIL1
6 FIL2
8 FIL4
7 FIL3
sPIN DESCRIPTION
PIN No. 18,19 PIN No. 10,11,20,21,22,23
PIN No. 1,2,4,5,6,8,9,24, 25,26,27,28,29,30
PIN No. 3,7
-5-
-6HPLin
+
C1 10uF/50V
NJM2191
HP Lin
C16
+
Lch in
C15
10uF/50V
Lch in Rch in GND GND GND GND
sAPPLICATION CIRCUIT
C2 10uF/50V
+
HPRin
HP WIDTH VR
+
HP Rin VOL1 VOL2 FIL6
C19 0.82uF C18 0.01uF
Rch in FIL5
C17 0.039uF
10uF/50 V
VREF
R27 10k C3 50kB
GND
0.0033uF C4 0.1uF C5 0.0047uF
FIL1 FIL2 FIL3 VOL3 VOL4 VREF
C20
+
FIL7 VREF IN
C26
+
GND
10kB
1uF/50V
WIDTH VR C25
+
FIL4 NC
C6
100uF/35V
GND
NJM2191
VREF
10uF/50V
HPLout HPRout
10uF/50V
+
C7 10uF/50
+
HP Lout HP Rout NC NC NC NC
Lch out Rch out SRS HP SW 3Dstereo SW
Lch out
C21
+
10uF/50V
Rch out
C23
+
GND V+
10uF/50 V
10uF/50V
+
C22
C24
+
HPSRS SW H R20 L 10k H R19 L 10k 3D Stereo SW
GND GND
V+
GND
100uF/50V + 12V
NJM2191
sTYPICAL CHARACTERISTICS "SRS 3D Stereo GAIN STRUCTURE" V+=12V, Ta=25, Vin=-10dBV, Width VR=Max
20
a
15
b
10
Gain[dB]
c
5
d
0
-5 10 100 1k 10k 100k
f[Hz] "SRS HEADPHONE GAIN STRUCTURE" V+=12V, Ta=25, Vin=-20dBV, Width VR=Max
20
15
a
10
Gain[dB]
b
5
c
0
d
-5 10 100 1k 10k 100k
f[Hz] No. a b c d INPUT Lch - Rch Lch Rch Lch + Rch OUTPUT Lch Lch Lch Lch
[CAUTION] The specifications on this data book are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this data book 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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