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. In addition to SSOP14, ultra small and thin package FFP12 (Flip-chip Fine Package) is applied. It is suitable for portable telephone, PDA and any portable audio applications. ■ PACKAGE OUTLINE NJM2704V NJM2704PB1 ■ FEATURES ● Operating Voltage ● Low Operating Current 1.8 to 6V 0.45mA typ. (at Active mode) 0.1µA typ. (at Standby mode) ● Low Output Noise 10µV typ. (at Surround mode, VR: max.) ● Variable Surround Effect by external resistor ● Internal Mode Control Switch ● Bipolar Technology ● Package Outline SSOP14, FFP12 ■ PIN CONFIGURATION 9 8 7 10 6 11 5 12 4 1 2 (FFP12) 3 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. VREF MODE SW RIN LIN STANDBY SW LOUT ROUT NFL NFR V+ DNC GND 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 (SSOP14) -1- NJM2704 ■ BLOCK DIAGRAM NFR NFL 9 3D FILTER ROUT 8 7 STEREO BYPASS V+ 10 3D FILTER BIAS GND 12 VREF -2- LOUT 5 STANDBY S W 4 LIN STEREO BYPASS DNC 11 1 6 2 MODE SW 3 RIN NJM2704 ■ABSOLUTE MAXIMUM RATING (Ta=25°C) 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=25°C 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 µA ●AC CHARACTERISTICS (V+=3V, Ta=25°C, VIN=-20dBV(100mVrms), f=1kHz, RL=10kΩ, 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=0Ω A-Weighted 0 0 L R Bypass - - -112 (2.5) -106 (5.0) Rg=0Ω 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 (µVrms) % Surround MAX - 0.1 0.5 -3- NJM2704 ●AC CHARACTERISTICS (V+=3V, Ta=25°C, VIN=-20dBV(100mVrms), f=1kHz, RL=10kΩ, 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=25°C 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 FFP12 SSOP14 FUNCTION EQUIVALENT CIRCUIT 5 VREF V+ Reference voltage 1.15V 300k 1 V+ 300k V+ Voltage V+ 2 4 MODE SW V+ V+ Mode control switch 0V 300k 700 V+ 3 2 RIN LIN Rch Input Lch Input V+ 1.15V 700 100k 3 4 V+ VREF V+ 1 STANDBY SW Standby switch 0V 700 75k 225k 5 V+ -5- NJM2704 PIN No. FFP12 SSOP14 SYMBOL FUNCTION EQUIVALENT CIRCUIT V+ 13 12 LOUT ROUT Lch Output Rch Output V+ V+ 1.15V 20k 6 7 V+ Voltage 12k V+ 20k V+ 8 9 11 10 NFL NFR Filter terminal Filter terminal 1.15V 400 10 9 V+ Power Supply V+ - 7 14 NC No Connect - 11 8 DNC Do Not Connect - -6- NJM2704 ■APPLICATION CIRCUIT FFP12 MIN MA X 4.7k VR 50kB Rch OUT 0.0047µ 0.0047µ 9 10µ 8 NFR 10 V+ 11 DNC 12 GND 7 NFL ROUT Lch OUT LOUT 6 V+ STANDBY SW 5 STANDBY S W LIN Lch IN 4 0.1µ VREF MODE S W RIN 1 2 3 1µ 100k 1µ Rch IN 0.1µ MODE S W SSOP14 STANDBY S W 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 0.1µ Lch IN 0.1µ 100k 1µ 1µ 10µ 6 GND V+ 4.7k 0.0047µ MODE S W 0.0047µ 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 -