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| NJM2703 3D SURROUND AUDIO PROCESSOR FOR HEADPHONE s GENERAL DESCRIPTION The NJM2703 is a high quality 3D surround audio processor designed for headphone applications. It includes mode control switch (Surround mode / Bypass mode). The NJM2703 features low operating voltage, low operating current, low output noise and very small package, and is suitable for any portable audio applications. s PACKAGE OUTLINE NJM2703RB2 s FEATURES q Operating Voltage 1.8 to 6V q Low Operating Current 0.45mA typ. (at Surround mode, VR: max.) q Low Output Noise 10V typ. (at Surround mode, VR: max.) q Variable Surround Effect by external resistor q Internal Mode Control Switch q Bipolar Technology q Package Outline TVSP10 s PIN CONFIGURATION 1 2 3 4 5 10 9 8 7 6 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. LIN RIN SW VREF GND V+ NFR NFL ROUT LOUT s BLOCK DIAGRAM LIN + + LOUT 3D FILTER RIN + Bypass ROUT Surround Mode -1- NJM2703 sABSOLUTE MAXIMUM RATING (Ta=25C) PARAMETER Supply Voltage Power Dissipation Operating Temperature Range Storage Temperature Range SYMBOL V + RATINGS 7 320 -20 to +75 -40 to +125 UNIT V mW PD Topr Tstg C C sOPERATING VOLTAGE PARAMETER Operating Voltage SYMBOL V+ TEST CONDITION MIN. 1.8 TYP. 3.0 MAX. 6.0 UNIT V - sELECTRICAL CHARACTERISTICS (V+=3V, Ta=25C unless otherwise specified) TEST CONDITION PARAMETER Operating Current Reference Voltage SYMBOL ICC No Signal 0 Vref No Signal 0 0 0 Surround MAX 1.0 0.45 1.15 0.7 1.3 V INPUT L 0 R 0 MIN. OUTPUT MODE Bypass VR 0.45 0.7 mA TYP. MAX. UNIT qAC CHARACTERISTICS (V+=3V, Ta=25C, VIN=-20dBV(100mVrms), f=1kHz, RL=10k, unless otherwise specified) TEST CONDITION PARAMETER Maximum Input Voltage SYMBOL VIM INPUT L f=1kHz T.H.D.=1% f=100Hz T.H.D.=1% V+=1.8V f=1kHz T.H.D.=1% V+=1.8V f=100Hz T.H.D.=1% Output Noise VNO Rg=0 A-Weighted Rg=0 A-Weighted Total Harmonic Distortion T.H.D f=1kHz VIN 0 VIN 0 VIN 0 VIN 0 0 R 0 VIN 0 VIN 0 VIN 0 VIN 0 MIN. OUTPUT L R L R L R L R L R L R L R L R MODE VR -2.0 (790) -16.0 (160) -8.5 (380) -22.5 (75) -112 (2.5) -100 (10) 0.02 TYP. MAX. UNIT Bypass - - - Surround MAX -10.5 (300) -24.5 (60) - dBV (mVrms) - Bypass - Surround MAX -106 (5.0) -94 (20) 0.05 % Bypass - dBV (Vrms) 0 VIN 0 VIN 0 0 0 VIN 0 VIN Surround MAX - Bypass - - f=1kHz Surround MAX - 0.1 0.5 -2- NJM2703 qAC CHARACTERISTICS (V+=3V, Ta=25C, VIN=-20dBV(100mVrms), f=1kHz, RL=10k, unless otherwise specified) TEST CONDITION PARAMETER Bypass Gain SYMBOL GVBYP f=1kHz Surround Gain GVSUR f=100Hz INPUT L VIN 0 VIN 0 0 VIN VIN 0 R 0 VIN 0 VIN VIN 0 0 VIN MIN. OUTPUT L R L R L R L R MODE VR TYP. MAX. UNIT Bypass - -1.0 0.0 1.0 dB Surround MAX 12.5 14.5 16.5 f=100Hz Surround MAX 10.5 12.5 14.5 dB f=100Hz Surround MIN 0.5 2.5 4.5 qCONTROL CHARACTERISTICS (V+=3V, 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 1.2 0.0 V+ V 0.3 TYP. MAX. UNIT VMODE sMODE SWITCH MODE Bypass Surround SW L, open H NOTES Input Through Surround Mode (Stereo Input) -3- NJM2703 sTERMINAL DESCRIPTION PIN NO. SYMBOL FUNCTION EQUIVALENT CIRCUIT V+ V+ V+ VOLTAGE 1 2 LIN RIN Rch Input Lch Input 1.15V 700 100k VREF V+ V+ V+ 3 SW Mode control switch 700 300k 0V V+ V+ V+ 4 VREF Reference voltage 300k 1.15V 5 GND GND 300k 0V -4- NJM2703 PIN NO. SYMBOL FUNCTION EQUIVALENT CIRCUIT VOLTAGE 5 V+ Power Supply V+ V+ V+ 7 8 NFL NFR Filter terminal Filter terminal 400 20k 1.15V V+ V+ V+ V+ 20k 9 10 ROUT LOUT Rch Output Lch Output 12k 1.15V -5- NJM2703 sAPPLICATION CIRCUIT Lch IN 10 Rch IN 10 SW 100k 1 1 LIN LOUT 10 10 Lch OUT 0.0033 2 RIN ROUT 9 Rch OUT 10 3 SW NFL 8 0.0033 4.7k MAX 4 VREF NFR 7 100 MIN 1 5 GND VR 50kB V+ 6 V+(3V) -6- NJM2703 sTYPICAL CHARACTERISTICS Supply Current vs. Supply Voltage Ta=25degrees 0.7 0.6 0.5 Supply Current [mA] Supply Current [mA] 0.4 0.3 0.2 0.1 0 0 1 2 3 4 5 6 7 Surround BYPASS 0.7 0.6 0.5 0.4 0.3 0.2 0.1 Supply Current vs. Ambient Temperature V+=3V BYPASS Surround 0 -50 -25 0 25 50 75 100 125 Supply Voltage [V] Ambient Temperature [degrees] Reference Voltage vs. Supply Voltage Ta=25degrees 3.5 3 2.5 2 1.5 1 0.5 0 0 1 2 3 4 5 6 7 1.3 Reference Voltage vs. Ambient Temperature V+=3V 1.25 Reference Voltage [V] Reference Voltage [V] 1.2 1.15 1.1 1.05 1 -50 -25 0 25 50 75 100 125 Supply Voltage [V] Ambient Temperature [degrees] Maximum Input Voltage vs. Supply Voltage (BYPASS) Vin=Lch f=1kHz Vout=Lch RL=10kohm THD=1% Ta=25degrees 10 Maximum Input Voltage vs. Supply Voltage (Surround) Vin=Lch f=100Hz Vout=Lch RL=10kohm VR=MAX THD=1% Ta=25degrees -5 Maximum Input Voltage [dBV] 0 Maximum Input Voltage [dBV] 0 1 2 3 4 5 6 7 5 -10 -15 -5 -20 -10 -25 -15 -30 0 1 2 3 4 5 6 7 Supply Voltage [V] Supply Voltage [V] -7- NJM2703 sTYPICAL CHARACTERISTICS Maximum Input Voltage vs. Ambient Temperature (BYPASS) V+=3V Vin=Lch f=1kHz Vout=Lch RL=10kohm THD=1% 0 Maximum Input Voltage vs. Ambient Temperature (Surround) V+=3V Vin=Lch f=100Hz Vout=Lch RL=10kohm VR=MAX THD=1% -15 Maximum Input Voltage [dBV] -2 Maximum Input Voltage [dBV] -25 0 25 50 75 100 125 -1 -16 -17 -3 -18 -4 -19 -5 -50 -20 -50 -25 0 25 50 75 100 125 Ambient Temperature [degrees] Ambient Temperature [degrees] Maximum Input Voltage vs. Ambient Temperature (BYPASS) V+=1.8V Vin=Lch f=1kHz Vout=Lch RL=10kohm THD=1% -5 Maximum Input Voltage vs. Ambient Temperature (Surround) V+=1.8V Vin=Lch f=100Hz Vout=Lch RL=10kohm VR=MAX THD=1% -20 Maximum Input Voltage [dBV] -7 Maximum Input Voltage [dBV] -25 0 25 50 75 100 125 -6 -21 -22 -8 -23 -9 -24 -10 -50 -25 -50 -25 0 25 50 75 100 125 Ambient Temperature [degrees] Ambient Temperature [degrees] Output Noise Voltage vs. Ambient Temperature V+=3V Rg=0ohm Vout=Lch VR=MAX FILTER=A-Weighted -90 Output Noise Voltage vs. Ambient Temperature V+=3V Rg=0ohm Vout=Rch VR=MAX FILTER=A-Weighted -90 -95 Output Noise Voltage [dBV] Output Noise Voltage [dBV] -95 -100 -100 -105 Surround -105 Surround -110 BYPASS -115 -110 BYPASS -115 -120 -50 -25 0 25 50 75 100 125 -120 -50 -25 0 25 50 75 100 125 Ambient Temperature [degrees] Ambient Temperature [degrees] -8- NJM2703 sTYPICAL CHARACTERISTICS Total Harmonic Distortion vs. Input Voltage (BYPASS) V+=3V Vin=Lch f=1kHz Vout=Lch RL=10kohm BW=10Hz to 80kHz 10 Total Harmonic Distortion vs. Input Voltage (Surround) V+=3V Vin=Lch f=100Hz Vout=Lch RL=10kohm BW=10Hz to 80kHz VR=MAX 10 1 1 THD+N [%] Ta=75deg. Ta=25deg. Ta=-20deg. THD+N [%] 0.1 0.1 0.01 Ta=75deg. Ta=25deg. Ta=-20deg. 0.001 -50 -40 -30 -20 -10 0 10 0.01 -50 -40 -30 -20 -10 0 Input Voltage [dBV] Input Voltage [dBV] Voltage Gain vs. Frequency (BYPASS) V+=3V Vin=-20dBV Lch Vout=Lch RL=10kohm Rg=25ohm 1 20 Voltage Gain vs. Frequency (Surround) V+=3V Vin=-20dBV Lch Vout=Lch RL=10kohm Rg=25ohm VR=MAX Ta=75deg. Ta=25deg. Ta=-20deg. 15 0.5 Ta=-20deg. Voltage Gain [dB] Ta=25deg. Ta=75deg. 0 Voltage Gain [dB] 10 5 -0.5 0 -1 10 100 1000 Frequency [Hz] 10 4 10 5 -5 10 100 1000 Frequency [Hz] 10 4 10 5 Voltage Gain vs. Frequency (Surround) V+=3V Vin=-20dBV Rch Vout=Lch RL=10kohm Rg=25ohm VR=MAX 15 20 Voltage Gain vs. Frequency (Surround) V+=3V Vin=-20dBV Lch Vout=Lch RL=10kohm Rg=25ohm VR=MIN 10 Ta=75deg. Ta=25deg. Ta=-20deg. Voltage Gain [dB] 15 Voltage Gain [dB] 5 10 Ta=75deg. Ta=25deg. 5 Ta=-20deg. 0 -5 0 -10 10 100 1000 Frequency [Hz] 10 4 10 5 -5 10 100 1000 Frequency [Hz] 10 4 10 5 -9- NJM2703 sTYPICAL CHARACTERISTICS Voltage Gain vs. SW Terminal Input Voltage V+=3V Vin=-20dBV Lch f=100Hz Vout=Lch VR=MAX BYPASS to Surround 20 Output DC Offset Voltage vs. Ambient Temperature V+=3V BYPASS to Surround 10 Output DC Offset Voltage [mV] 15 5 Voltage Gain [dB] 10 Ta=75deg. Ta=25deg. Ta=-20deg. Lch 0 Rch -5 5 0 -5 0 0.5 1 1.5 2 -10 -50 -25 0 25 50 75 100 125 SW Terminal Input Voltage [V] Ambient Temperature [degrees] [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. - 10 - |
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