NJM2188 PRELI M I N ARY Passive Matrix TruSurroundTM 3D Audio Processor ■GENERAL 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. ■PACKAGE NJM2188D NJM2188M NJM2188V ■FEATURES ●Operating Voltage (4.7 to 13V) + ●Maximum Input Voltage (1.5Vrms typ. at V ≥11V) ●Low Output Noise (32µVrms typ. at TRU mode) ●SRS 3D-STEREO FUNCTION (Two-grade Switch for 3D Effect) ●BYPASS FUNCTION (THROUGH) ●Bipolar Technology ●Package Outline DIP16, DMP16, SSOP16 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 - 1 -A NJM2188 FIL1_IN3 FIL1_IN1 FIL1_IN2 FIL1_OUT ■BLOCK DIAGRAM 51K BYPASS 20K Lch in TRU 150K 1K 15K VREF TRU 45K 6.18K 5K SRS 3D-2 BYPASS 37.5K VREF Lch out TRU (SRS 3D) MIX SRS 3D-1 12.5K VREF 20K SW1 SW3 11K 3.9K 50K SW2 SW4 Rch out TRU (SRS 3D) VREF V+ VREF Rch in 50K SRS 3D1 V+ MIX SRS 3D-2 50K SW1 SW2 VREF SW3 SW4 50K 50K VREF VREF 50K VREF VREF GND FIL2_IN2 FIL2_IN FIL2_OUT MODE2 MODE1 SW Control ■PIN CONFIGRATION MODE 1 16 Lch in 2 15 Rch in V 3 14 FIL1_OUT VREF 4 13 FIL1_IN1 MODE 2 + NJM2188 FIL2_OUT 5 12 FIL1_IN2 FIL2_IN 6 11 FIL1_IN3 7 10 Lch out 8 9 Rch out FIL2_IN2 GND -2- 1 No. Symbol Function 1 MODE1 Mode Switch 2 MODE2 Mode Switch 3 V+ Supply Voltage 4.5V to 13V 4 VREF V+/2 OUTPUT 5 FIL2_OUT Perspective Network_2 output 6 FIL2_IN Perspective Network_2 input 7 FIL2_IN2 Perspective Network_2 input2 8 GND Ground 9 Rch OUT Rch OUTPUT 10 Lch OUT Lch OUTPUT 11 FIL1_IN3 Perspective Network_1 INPUT3 12 FIL1_IN2 Perspective Network_1 INPUT2 13 FIL1_IN1 14 FIL1_OUT 15 Rch IN Perspective Network_1 INPUT1 Perspective Network_1 OUTPUT Rch INPUT 16 Lch IN Lch INPUT NJM2188 ■ABSOLUTE MAXIMUM RATING (Ta=25°°C) PARAMETER Supply Voltage SYMBOL + V RATING 15 (DIP16) 500 (DMP16) 300 (SSOP16) 300 UNIT V °C °C Power Dissipation PD Operating Temperature Range Topr -40 to Storage Temperature Range Tstg -40 to +125 mW +85 ■ELECTRICAL CHARACTERISTICS(V =12V,Ta=25°°C) + CONDITION PARAMETER Operating Voltage Supply Current Reference Voltage SYMBOL IN + V Icc VREF No Signal + V /2 f=1kHz THD=3% f=125Hz THD=3% Maximum Input Voltage VINMAX f=125Hz THD=3% f=125Hz THD=3% OUT MODE MIN TYP MAX UNIT 4.7 12.0 13.0 V - 9.0 13.5 mA V L R - - - - 0 0 - BYPASS 0 0 - TRU 0 0 - SRS 3D-1 - - - - 5.5 6.0 6.5 VIN 0 L BYPASS 11.0 (3.55) 12.0 (3.98) - 4.5 (1.67) 6.5 (2.11) - 7.3 (2.32) 9.3 (2.92) - 0 VIN R VIN 0 L VIN 0 R VIN VIN L 3.9 (1.57) 5.9 (1.97) - VIN 0 L 7.5 (2.37) 9.5 (3.0) - VIN 0 R 7.3 (2.32) 9.3 (2.92) - VIN VIN L 4.0 (1.58) 6.0 (2.0) - VIN 0 L 7.5 (2.37) 9.5 (3.0) - VIN 0 R 7.5 (2.37) 9.5 (3.0) - VIN VIN L 4.5 (1.68) 6.5 (2.11) - TRU SRS3D-1 SRS3D-2 dBV (Vrms) -3- NJM2188 ■ELECTRICAL CHARACTERISTICS(V =12V,Ta=25°°C) + CONDITION PARAMETER Output Noise SYMBOL VNOISE IN A- Weighting Rg=0Ω L R 0 0 OUT MIN TYP MAX BYPASS - -110 (3.16) -100 (10.0) TRU - -90 (31.6) -84 (63.1) SRS3D-1 - -90 (31.6) -84 (63.1) - 0.01 - - 0.01 - - 0.10 - - 0.20 - - 0.10 - - 0.20 - -1.0 0.0 1.0 -1.0 0.0 1.0 0.2 2.2 4.2 MODE L 0 0 R 0 0 L 0 0 R 0 0 L 0 0 R VIN 0 L UNIT dBV (µVrms) BYPASS Total Harmonic Distortion THD f=1kHz VIN=-10dB 0 VIN R VIN 0 L % TRU VIN 0 R VIN 0 L SRS3D-1 Bypass Gain Passive Gain GBypass2 GLt/Rt-L f=1kHz -4- R VIN 0 L BYPASS 0 VIN R VIN 0 L dB TRU GLt/Rt-R f=1kHz dB VIN 0 R -14.0 -12.0 -10.0 VIN 0 L -4.8 -2.8 -0.8 VIN 0 R -15.1 -13.1 -11.1 0 VIN L -15.1 -13.1 -11.1 VIN 0 L -5.8 -3.8 -1.8 VIN 0 R -21.1 -19.1 -17.1 0 VIN L -21.1 -19.1 -17.1 VIN=High Level - - - - 2.0 - V VIN=Low Level - - - - 0.0 - 0.7 SRS3D-1 dB GSRS3D f=1kHz MODE Select Control Voltage 0 f=1kz f=1kHz SRS 3D Gain VIN SRS3D-2 dB + VMODE V NJM2188 ■MODESELECT SWITCH MODE MODE1 MODE2 NOTE BYPASS L L INPUT THROUGH MODE TRU L H Passive Matrix TruSurround SRS 3D-1 H L SRS 3D STEREO MODE Space 100% Center 90% SRS 3D-2 H H SRS 3D STEREO MODE Space 90% Center 70% VREF ■APPLICATION CIRCUIT 0.01uF Lch in Rch in C4 C1 C10 C2 0.22uF 10uF/50V C11 0.22uF C3 0.0047uF 10uF/50V C9 Rch out Rch out Lch out FIL1_IN3 FIL1_IN2 FIL1_OUT Rch in FIL1_IN1 10uF/50V Lch in 10uF/50V GND FIL2_OUT VREF V+ MODE2 MODE1 V+ FIL2_IN2 NJM2188 100uF/25V FIL2_IN 12V C13 Lch out C8 GND GND 1.8K H R16 L GND 100uF /25V 10K 2M R10 R17 GND 10K C14 10uF/50V C5 0.0047uF 33K R13 R11 75K R15 VREF 51K C6 C15 10uF/50V 0.01uF GND GND C1,C6 C2,C4 C3,C5,C7 C8,C9,C10,C11 C14,C15 C12,C13 R9 R10 R11 VALUE 0.01µF 0.22µF 0.0047µF 10µF 10µF 100µF 1.8k 2M 51k C7 0.0047uF 1.5K R14 GND VREF PARTS NO. R12 C12 H L 56K R9 Tolerance ±5% ±5% ±5% PARTS NO. R12 R13 R14 R15 R16,R17 VREF VREF VALUE 56k 33k 1.5k 75k 10k Tolerance ±5% ±5% ±5% ±5% ±5% ±5% ±5% ±5% -5- NJM2188 ■TYPICAL CHARACTERISTICS FREQUENCY RESPONSE BYPASS MODE FREQUENCY RESPONSE TRU(Lt/Rt) MODE +10 +5 +5 +0 a, b +0 a, c -5 -10 Vout Vout -10 (dBV) -15 (dBV) -15 -20 -25 -30 20 b, d -20 -25 50 100 200 500 1k 2k 5k 10k 20k -30 20 50 100 500 1k f(Hz) a: Vin = 0dBV Lch ⇒ Vout = Lch b: Vin = 0dBV Rch ⇒ Vout = Rch V+=12V, 0dB V = 1Vrms 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 2k 5k 10k 20k 10k 20k FREQUENCY RESPONSE SRS 3D-2 MODE +10 +10 +5 +5 +0 +0 -5 Vout 200 f(Hz) -5 a, c -10 Vout (dBV) a, c -10 (dBV) -15 -15 b, d -20 -20 b, d -25 -30 20 -6- -25 50 100 200 500 1k 2k 5k 10k 20k -30 20 50 100 200 500 f(Hz) 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 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 1k 2k 5k NJM2188 TOTAL HARMONIC DISTORTION vs. INPUT VOLTAGE BYPASS MODE TOTAL HARMONIC DISTORTION vs. INPUT VOLTAGE TRU MODE 5 10 2 5 1 0.5 2 0.2 1 0.1 0.05 THD(%) 0.5 a THD(%) 0.02 0.2 0.01 a, b 0.005 0.1 b 0.002 0.05 0.001 0.0005 0.02 0.0002 0.0001 -30 -25 -20 -15 -10 -5 +0 +5 +10 0.01 +15 -30 -25 -20 -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 TOTAL HARMONIC DISTORTION vs. INPUT VOLTAGE SRS 3D-1 MODE 10 5 5 2 2 1 1 0.5 0.5 a +0 +5 +10 +15 Lch ⇒ Vout = Lch Lch ⇒ Vout = Rch THD(%) 0.2 b 0.2 0.1 0.05 0.05 0.02 0.02 -25 -20 -15 -10 -5 +0 a 0.1 b 0.01 -30 -5 TOTAL HARMONIC DISTORTION vs. INPUT VOLTAGE SRS 3D-2 MODE 10 THD(%) -10 INPUT LEVEL(dBV) +5 +10 +15 0.01 -30 -25 -20 INPUT LEVEL(dBV) a: Vin = 1kHz b: Vin = 1kHz + V =12V Lch ⇒ Vout = Lch Lch ⇒ Vout = Rch -15 -10 -5 +0 +5 +10 +15 INPUT LEVEL(dBV) a: Vin = 1kHz b: Vin = 1kHz + V =12V 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. -7-