NJM2191 PRERMINARY SRS 3D Stereo & SRS HEADPHONE AUDIO PROCESSOR ■GENERAL 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. ■FEATURES ● Operating Voltage ● Low Operating Current ■PACKAGE OUTLINE 4.7 to 13V 10.0 mA typ. at 3D Stereo Mode 11.0mA typ. at SRS HP Mode ● Low Output Noise 17.8µVrms typ.at 3D Stereo Mode 17.8µVrms typ at SRS HP Mode ● Bypass Gain 0dB typ. ● Sound Field Adjustment by Width Volume ● Internal Mode Switch 3D Stereo / SRS HP ● Bipolar Technology ● Package Outline SDIP30, SDMP30 NJM2191L 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 ■ABSOLUTE MAXIMUM (Ta=25°C) PARAMETER SYMBOL + RATINGS UNIT Operating Voltage V 15 V Power Dissipation PD 700 mW Operating Temperature Range TOPR -40 to +85 °C Storage Temperature Range Tstg -40 to +125 °C ■ELECTRICAL CHARACTERISTICS (V+=12V, Ta=25°C, VIN=-10dBV(316mVrms), unless otherwise specification) CONDITION PARAMETER Operating Voltage Operating Current Reference Voltage Maximum Input Voltage -2- SYMBOL + V ICC VREF VIM INPUT OUTPUT MODE WIDTH VR MIN TYP MAX UNIT V L R - - - - - 4.7 12.0 13.0 0 0 - BYPASS - 5.0 9.0 13.0 0 0 - 3D Stereo MAX 6.0 10.0 14.0 0 0 - SRS HP MAX 7.0 11.0 15.0 0 0 - 3D Stereo SRS HP MAX 8.0 12.0 16.0 V /2 + 0 0 - - - 5.8 6.0 6.2 f=1kHz T.H.D.=3% VIN - VIN L R BYPASS 3D Stereo - 11.0 (3.5) 12.0 (4.0) - f=1kHz T.H.D.=3% VIN - VIN L R BYPASS SRS HP - 11.0 (3.5) 12.0 (4.0) - f=125kHz T.H.D.=3% VIN VIN - L R 3D Stereo MAX -1.3 (0.9) 0.7 (1.1) - f=125kHz T.H.D.=3% VIN VIN L 3D Stereo MAX 10.0 (3.2) 12.0 (4.0) - f=125kHz T.H.D.=3% VIN -VIN L 3D Stereo MAX -7.1 (0.4) -5.1 (0.6) - f=100Hz T.H.D.=3% VIN VIN - L R SRS HP MAX -6.1 (0.5) -4.1 (0.6) - f=100Hz T.H.D.=3% VIN VIN L SRS HP MAX 9.9 (3.1) 11.9 (3.9) - f=100Hz T.H.D.=3% VIN -VIN L SRS HP MAX -12.1 (0.2) -10.1 (0.3) - - mA No Signal V dBV (Vrms) NJM2191 ■ELECTRICAL CHARACTERISTICS (V+=12V, Ta=25°C, VIN=-10dBV(316mVrms), unless otherwise specification) CONDITION PARAMETER Output Noise Total Harmonic Distortion Bypass Gain 3D Stereo Gain SYMBOL VNOISE THD GVBYP GVSRS L+R Gain GL+R L-R Gain GL-R Mode Select Control Switch VMODE INPUT OUTPUT MODE WIDTH VR MIN TYP MAX UNIT BYPASS 3D Stereo - - -110 (3.2) -95 (17.8) -110 (3.16) -95 (17.8) -95 (17.8) -100 (10.0) -84 (63.1) -100 (10.0) -84 (63.1) -84 (63.1) 3D Stereo MAX - BYPASS SRS HP - - dBV (uVrms) SRS HP MIN - SRS HP MAX - BYPASS 3D Stereo - - 0.01 0.05 L R 0 0 0 0 0 0 0 0 0 0 VIN - VIN L R L R L R L R L R L R VIN - L 3D Stereo MAX - 0.10 0.20 - VIN R 3D Stereo MAX - 0.10 0.20 VIN VIN - VIN VIN L R L R BYPASS SRS HP - - 0.01 0.05 SRS HP MIN - 0.10 0.30 VIN - L SRS HP MAX - 0.01 0.10 - VIN R SRS HP MAX - 0.20 0.40 VIN VIN - VIN VIN L R L R BYPASS 3D Stereo BYPASS SRS HP - -1.0 0.0 1.0 - -1.0 0.0 1.0 VIN - VIN L R 3D Stereo MAX 9.2 11.2 13.2 VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN 3D Stereo MIN -2.5 -0.5 1.5 3D Stereo MAX 6.5 8.5 10.5 VIN VIN VIN VIN -VIN -VIN -VIN -VIN L R L R L R L R L R L R SRS HP MIN -2.0 0.0 2.0 SRS HP MAX -2.0 0.0 2.0 SRS HP MIN 3.3 5.3 7.3 SRS HP MAX 18.9 20.9 22.9 VIN = ”High Level” - - - - - 2.0 - V VIN = ”Low Level” - Rg=0Ω A-Weighted f=1kHz f=1kHz f=125Hz Vin=-20dBV f=100Hz Vin=-20dBV f=100Hz % dB dB dB dB + V - - - - 0.0 - 0.7 ✔ The word “-VIN” signifies opposite phase of “VIN” -3- NJM2191 ■MODE SWITCH 3D Stereo SW BYPASS Low Level 3D Stereo High Level SRS-HP SW BYPASS Low Level SRS HP High Level ■PIN CONFIGURATION 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 NJM2191 1 -4- 2 3 4 5 6 7 8 9 10 11 12 13 14 15 No SYMBOL FUNCTION No. SYMBOL FUNCTION 1 HPLin Lch Input for SRS HP 16 V+ 4.7 to 13V 2 HPRin Rch Input for SRS HP 17 GND GROUND 3 VOL1 Width Control Output for SRS HP 18 3D Stereo SW 3D Stereo Mode Switch 4 VOL2 Width Control Input for SRS HP 19 SRS HP SW SRS HP Mode Switch 5 FIL1 Filter1 20 Rch out Rch Output 6 FIL2 Filter2 21 Lch out Lch Output 7 FIL3 Filter3 22 VREFOUT Reference Voltage Input 8 FIL4 Filter4 23 VOL4 Width Control Input for SRS Stereo 9 NC NC 24 VOL3 Width Control Output for SRS Stereo 10 HPLout Lch Output for SRS HP 25 VREFIN Reference Voltage Output 11 HPRout Rch Output for SRS HP 26 FIL7 Filter6 12 NC NC 27 FIL6 Filter7 13 NC NC 28 FIL5 Filter8 14 NC NC 29 Rch in Rch Input 15 NC NC 30 Lch in Lch Input FIL6 FIL7 28 27 26 24 23 VOL3 FIL5 ■BLOCK DIAGRAM VOL4 NJM2191 BYPASS Lch in 30 21 Lch out - - MIX + VREF SW1 3D Stereo BYPASS Rch in 29 20 Rch out MIX SW2 3D Stereo VREF 16 V+ V+ 50k 3D Stereo SW 18 SW Control SW 4 SRS HP SW 19 25 VREF IN SW 3 SW2 50k SW 1 VREF GND VREF 17 GND 22 VREF BYPASS HPLin 1 10 HPLout + - MIX - VREF SW3 SRS HP BYPASS HPRin 2 11 HPRout MIX SW4 SRS HP 6 8 7 FIL4 FIL3 VOL1 5 FIL2 4 FIL1 3 VOL2 VREF ■PIN 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- -6+ C7 10uF/50 + 10uF/50V C24 V+ 100uF/50V + GND GND V+ C20 10kB + 12V C21 C22 C25 GND GND GND GND Rch in Lch in C23 Rch out Lch out 100uF/35V 10uF/50V 10uF/50 V 10uF/50V 10uF/50V + NC GND 1uF/50V 0.82uF 0.01uF 0.039uF WIDTH VR C26 + NC SRS HP SW Rch out Lch out 3Dstereo SW NJM2191 NC NC HP Rout HP Lout VREF VOL4 VOL3 VREF IN + HPRout HPLout NC FIL4 FIL3 FIL2 C19 C18 C17 C16 10uF/50 V 10uF/50V + C6 0.1uF FIL7 FIL6 FIL5 Rch in C15 + 0.0047uF C5 C4 0.0033uF FIL1 VOL2 VOL1 HP Rin Lch in + GND C3 R27 10k 50kB HP WIDTH VR + GND C2 10uF/50V HP Lin + VREF C1 10uF/50V + HPRin HPLin VREF GND NJM2191 ■APPLICATION CIRCUIT HPSRS SW H R20 L 10k H R19 L 10k 3D Stereo SW + GND NJM2191 ■TYPICAL CHARACTERISTICS “SRS 3D Stereo GAIN STRUCTURE” V+=12V, Ta=25℃ ℃, Vin=-10dBV, Width VR=Max 20 a 15 b Gain[dB] 10 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 Gain[dB] 15 a 10 b 5 c d 0 -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. -7-