NJM2704 3D SURROUND AUDIO PROCESSOR FOR HEADPHONE GENERAL DESCRIPTION The NJM2704 is a high quality 3D surround audio processor designed for headphone applications. It includes mode control switches for surround function and standby function and realizes low consumption power design by standby function. It is suitable for portable telephone, PDA and any portable audio applications. PACKAGE OUTLINE NJM2704V FEATURES Operating Voltage Low Operating Current 1.8 to 6V 0.45mA typ. (at Active mode) 0.1A typ. (at Standby mode) Low Output Noise 10V typ. (at Surround mode, VR: max.) Variable Surround Effect by external resistor Internal Mode Control Switch Bipolar Technology Package Outline SSOP14 PIN CONFIGURATION 1 14 2 13 3 12 4 11 5 10 6 9 7 8 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. STANDBY SW LIN RIN MODE SW VREF GND NC DNC V+ NFR NFL ROUT LOUT NC -1- NJM2704 BLOCK DIAGRAM NFR NFL 3D FILTER V+ ROUT STEREO BYPASS 3D FILTER LOUT STEREO BYPASS TP BIAS GND LIN VREF -2- STANDBY SW MODE SW RIN NJM2704 ABSOLUTE MAXIMUM RATING (Ta=25C) PARAMETER SYMBOL RATINGS UNIT + Supply Voltage V 7 V Power Dissipation PD 320 mW Operating Temperature Range Topr -20 to +75 C Storage Temperature Range Tstg -40 to +125 C OPERATING VOLTAGE PARAMETER Operating Voltage SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT V+ - 1.8 3.0 6.0 V MIN. TYP. MAX. UNIT ELECTRICAL CHARACTERISTICS (V+=3V, Ta=25C unless otherwise specified) TEST CONDITION PARAMETER Operating Current Reference Voltage SYMBOL INPUT ICC OUTPUT MODE VR L R 0 0 - Active - - 450 700 0 0 - Standby - - 0.1 1.0 0 0 - - - 1.0 1.15 1.3 V MIN. TYP. MAX. UNIT No Signal Vref No Signal A AC CHARACTERISTICS (V+=3V, Ta=25C, VIN=-20dBV(100mVrms), f=1kHz, RL=10k, unless otherwise specified) TEST CONDITION PARAMETER Maximum Input Voltage SYMBOL VIM INPUT Total Harmonic Distortion VNO MODE VR L R f=1kHz T.H.D.=1% VIN 0 0 VIN L R Bypass - - -2.0 (790) - f=100Hz T.H.D.=1% VIN 0 0 VIN L R Surround MAX - -16.0 (160) - VIN 0 0 VIN L R Bypass - -10.5 (300) -8.5 (380) - VIN 0 0 VIN L R Surround MAX -24.5 (60) -22.5 (75) - Rg=0 A-Weighted 0 0 L R Bypass - - -112 (2.5) -106 (5.0) Rg=0 A-Weighted 0 0 L R Surround MAX - -100 (10) -94 (20) f=1kHz VIN 0 0 VIN L R Bypass - - 0.02 0.05 f=1kHz VIN 0 0 VIN L R V+=1.8V f=1kHz T.H.D.=1% V+=1.8V f=100Hz T.H.D.=1% Output Noise OUTPUT T.H.D dBV (mVrms) dBV (Vrms) % Surround MAX - 0.1 0.5 -3- NJM2704 AC CHARACTERISTICS (V+=3V, Ta=25C, VIN=-20dBV(100mVrms), f=1kHz, RL=10k, unless otherwise specified) TEST CONDITION PARAMETER Bypass Gain Surround Gain SYMBOL INPUT OUTPUT MODE VR MIN. TYP. MAX. UNIT dB L R f=1kHz VIN 0 0 VIN L R Bypass - -1.0 0.0 1.0 f=100Hz VIN 0 0 VIN L R Surround MAX 12.5 14.5 16.5 f=100Hz 0 VIN VIN 0 L R Surround MAX 10.5 12.5 14.5 f=100Hz VIN 0 0 VIN L R Surround MIN 0.5 2.5 4.5 MIN. TYP. MAX. GVBYP GVSUR dB CONTROL CHARACTERISTICS (V+=3V, Ta=25C unless otherwise specified) TEST CONDITION PARAMETER Mode Select Control Voltage SYMBOL VMODE INPUT VIN= High Level VIN= Low Level L R - - OUTPUT MODE VR - - - 1.2 - V+ - 0.0 - 0.3 V - - - - SWITCH FUNCTION MODE SW MODE Bypass Surround Terminal Status L, open H NOTES Input Through Surround Mode (Stereo Input) STANDBY SW MODE Standby Active -4- Terminal Status L, open H UNIT NOTES IC is non-active IC is active NJM2704 TERMINAL DESCRIPTION PIN No. SYMBOL FUNCTION EQUIVALENT CIRCUIT V+ STANDBY SW V+ Standby switch 0V 700 75k 225k 1 Voltage V+ LIN RIN Lch Input Rch Input V+ 1.15V 700 100k 2 3 V+ VREF V+ 4 MODE SW V+ V+ Mode control switch 0V 300k 700 VREF Reference voltage V+ 300k 5 V+ 1.15V 300k V+ -5- NJM2704 PIN No. SYMBOL FUNCTION EQUIVALENT CIRCUIT 6 GND GND 0V 7 14 NC No Connect - 8 DNC Do Not Connect - 9 V+ Power Supply V+ V+ 20k V+ Voltage 10 11 NFR NFL Filter terminal Filter terminal 1.15V 400 V+ ROUT LOUT Rch Output Lch Output -6- V+ V+ 1.15V 20k 12 13 V+ 12k NJM2704 APPLICATION CIRCUIT STANDBY SW NC 14 LIN LOUT 13 Lch OUT 3 RIN ROUT 12 Rch OUT 4 MODE SW NFL 11 5 VREF NFR 10 1 STANDBY SW 2 0.1u Lch IN 0.1u 100k 1u 1u 10u 6 GND V+ 4.7k 0.0047u MODE S W 0.0047u Rch IN MAX MIN VR 50kB 9 V+ 7 NC DNC 8 -7- NJM2704 Supply Current vs. Supply Voltage Supply Current vs. Ambient Temperature Ta=25degrees V+=3V 0.7 0.7 0.6 0.6 0.5 0.5 Supply Current [mA] Supply Current [mA] TYPICAL CHARACTERISTICS Surround BYPASS 0.4 0.3 0.2 0.1 0.1 0 1 2 3 4 5 6 0 -50 7 25 50 75 100 125 Reference Voltage vs. Supply Voltage Reference Voltage vs. Ambient Temperature Ta=25degrees V+=3V 1.3 1.25 Reference Voltage [V] 2.5 2 1.5 1 1.2 1.15 1.1 1.05 0.5 0 0 1 2 3 4 5 6 1 -50 7 -25 0 25 50 75 100 125 Supply Voltage [V] Ambient Temperature [degrees] Maximum Input Voltage vs. Supply Voltage (BYPASS) Maximum Input Voltage vs. Supply Voltage (Surround) Vin=Lch f=1kHz Vout=Lch RL=10kohm THD=1% Ta=25degrees Vin=Lch f=100Hz Vout=Lch RL=10kohm VR=MAX THD=1% Ta=25degrees 10 -5 5 -10 Maximum Input Voltage [dBV] Maximum Input Voltage [dBV] 0 Ambient Temperature [degrees] 3 0 -5 -10 -15 -20 -25 -15 -30 0 1 2 3 4 Supply Voltage [V] -8- -25 Supply Voltage [V] 3.5 Reference Voltage [V] 0.3 0.2 0 BYPASS Surround 0.4 5 6 7 0 1 2 3 4 Supply Voltage [V] 5 6 7 NJM2704 TYPICAL CHARACTERISTICS Maximum Input Voltage vs. Ambient Temperature (Surround) V+=3V Vin=Lch f=1kHz Vout=Lch RL=10kohm THD=1% V+=3V Vin=Lch f=100Hz Vout=Lch RL=10kohm VR=MAX THD=1% 0 -15 -1 -16 Maximum Input Voltage [dBV] Maximum Input Voltage [dBV] Maximum Input Voltage vs. Ambient Temperature (BYPASS) -2 -3 -4 -5 -50 -17 -18 -19 -25 0 25 50 75 100 -20 -50 125 -25 0 25 50 75 100 125 Ambient Temperature [degrees] Maximum Input Voltage vs. Ambient Temperature (BYPASS) Maximum Input Voltage vs. Ambient Temperature (Surround) V+=1.8V Vin=Lch f=1kHz Vout=Lch RL=10kohm THD=1% V+=1.8V Vin=Lch f=100Hz Vout=Lch RL=10kohm VR=MAX THD=1% -5 -20 -6 -21 Maximum Input Voltage [dBV] Maximum Input Voltage [dBV] Ambient Temperature [degrees] -7 -8 -9 -10 -50 -22 -23 -24 -25 0 25 50 75 100 -25 -50 125 0 25 50 75 100 125 Ambient Temperature [degrees] Ambient Temperature [degrees] Output Noise Voltage vs. Ambient Temperature Output Noise Voltage vs. Ambient Temperature V+=3V Rg=0ohm Vout=Lch VR=MAX FILTER=A-Weighted V+=3V Rg=0ohm Vout=Rch VR=MAX FILTER=A-Weighted -90 -90 -95 -95 Output Noise Voltage [dBV] Output Noise Voltage [dBV] -25 -100 Surround -105 -110 BYPASS -115 -120 -50 -100 Surround -105 -110 BYPASS -115 -25 0 25 50 75 Ambient Temperature [degrees] 100 125 -120 -50 -25 0 25 50 75 100 125 Ambient Temperature [degrees] -9- NJM2704 TYPICAL CHARACTERISTICS Total Harmonic Distortion vs. Input Voltage (BYPASS) Total Harmonic Distortion vs. Input Voltage (Surround) V+=3V Vin=Lch f=1kHz Vout=Lch RL=10kohm BW=10Hz to 80kHz V+=3V Vin=Lch f=100Hz Vout=Lch RL=10kohm BW=10Hz to 80kHz VR=MAX 10 10 1 THD+N [%] THD+N [%] 1 Ta=75deg. Ta=25deg. Ta=-20deg. 0.1 Ta=75deg. Ta=25deg. Ta=-20deg. 0.1 0.01 0.001 -50 -40 -30 -20 -10 0 0.01 -50 10 -40 Input Voltage [dBV] -30 -20 -10 0 Input Voltage [dBV] Voltage Gain vs. Frequency (BYPASS) Voltage Gain vs. Frequency (Surround) V+=3V Vin=-20dBV Lch Vout=Lch RL=10kohm Rg=25ohm V+=3V Vin=-20dBV Lch Vout=Lch RL=10kohm Rg=25ohm VR=MAX 1 20 Ta=75deg. Ta=25deg. Ta=-20deg. 15 0.5 Voltage Gain [dB] Voltage Gain [dB] Ta=-20deg. Ta=25deg. Ta=75deg. 0 10 5 -0.5 0 -1 10 100 1000 10 4 10 -5 5 10 100 Frequency [Hz] 4 10 5 Voltage Gain vs. Frequency (Surround) Voltage Gain vs. Frequency (Surround) V+=3V Vin=-20dBV Rch Vout=Lch RL=10kohm Rg=25ohm VR=MAX V+=3V Vin=-20dBV Lch Vout=Lch RL=10kohm Rg=25ohm VR=MIN 10 5 20 Ta=75deg. Ta=25deg. Ta=-20deg. 15 Voltage Gain [dB] 10 Voltage Gain [dB] 10 Frequency [Hz] 15 5 0 -5 10 Ta=75deg. Ta=25deg. Ta=-20deg. 5 0 -10 10 100 1000 Frequency [Hz] - 10 - 1000 10 4 10 5 -5 10 100 1000 Frequency [Hz] 10 4 NJM2704 TYPICAL CHARACTERISTICS Voltage Gain vs. SW Terminal Input Voltage Output DC Offset Voltage vs. Ambient Temperature V+=3V Vin=-20dBV Lch f=100Hz Vout=Lch VR=MAX BYPASS to Surround V+=3V BYPASS to Surround 10 20 Output DC Offset Voltage [mV] Voltage Gain [dB] 15 10 Ta=75deg. Ta=25deg. Ta=-20deg. 5 0 -5 0 0.5 1 1.5 SW Terminal Input Voltage [V] 2 5 Lch 0 Rch -5 -10 -50 -25 0 25 50 75 100 125 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. - 11 - Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: NJR: NJM2704V-TE1