NJM2705 Surround Audio Processor for Mobile Applications ■ GENERAL DESCRIPTION The NJM2705 is the surround audio processor for mobile applications. It regenerates the 3D surround sound with extremely narrow space two speakers (2SP mode), headphone surround with normal headphone (HP mode) and reverberation sound with only one speaker (1SP mode). It includes mode control switches for surround function and standby function and realizes low consumption power design by standby function. In addition to SSOP16, ultra small and thin packages FFP16 (Flip-Chip Fine Package) and PCSP16 (Plastic Chip Size Package) is applied. It is suitable for cellular phone, PDA and portable game. ■ PACKAGE OUTLINE NJM2705PB1 NJM2705SD3 NJM2705V ■ FEATURES ● Operating Voltage ● Operating Current 1.8 to 6V 0.7mA typ. at Active mode 1µA max. at Standby mode ● Low Output Noise 10µVrms typ (2SP/HP/1SP mode, VR : max.) ● Variable Surround Effect by external resistor (Adjustable for speaker and headphone independently.) ● Standby Function ● Internal Mode Control Switch ● Bipolar Technology ● Package Outline FFP16, PCSP16, SSOP16 ■ BLOCK DIAGRAM LOUT 3D Enhancer LIN 3D Filter RIN ROUT 1SP Surround Bypass mode 2SP mode Surround mode HP mode 1SP mode -1- NJM2705 ■ PIN CONFIGURATION FFP16 (Top View) 12 11 10 9 13 8 14 7 15 6 16 5 1 2 3 1. 2. 3. 4. 5. 6. 7. 8. LIN RIN LOUT ROUT NFSPR NFHPR NFSPL NFHPL 9. LMON 10. PS 11. SW2 12. SW1 13. STBY 14. V+ 15. GND 16. VREF 1. 2. 3. 4. 5. 6. 7. 8. ROUT LOUT RIN LIN VREF GND V+ STBY 9. SW1 10. SW2 11. PS 12. LMON 13. NFHPL 14. NFSPL 15. NFHPR 16. NFSPR 1. 2. 3. 4. 5. 6. 7. 8. NFHPR NFSPR ROUT LOUT RIN LIN VREF GND 9. V+ 10. STBY 11. SW1 12. SW2 13. PS 14. LMON 15. NFHPL 16. NFSPL 4 PCSP16 (Top View) 12 11 10 9 13 8 14 7 15 6 16 5 1 2 3 4 SSOP16 (Top View) -2- 1 16 2 15 3 14 4 13 5 12 6 11 7 10 8 9 NJM2705 ■ABSOLUTE MAXIMUM RATING (Ta=25°C) PARAMETER Supply Voltage SYMBOL + V Power Dissipation PD Operating Temperature Range Storage Temperature Range Topr Tstg RATINGS 7 (FFP16) 400 (PCSP16) TBD (SSOP16) 300 -20 to +75 -40 to +125 UNIT V mW °C °C ■OPERATING VOLTAGE PARAMETER SYMBOL TEST CONDITION MIN TYP MAX UNIT Operating Voltage 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 INPUT SYMBOL Operating Current ICC Reference Voltage Vref No Signal No Signal OUT MODE SP HP VR VR L R PUT 0 0 0 0 - Standby - 450 0.1 700 1.0 µA 0 0 - - 1.0 1.15 1.3 V MIN TYP MAX UNIT Active ●AC CHARACTERISTICS + (V =3V, Ta=25°C, VIN=-20dBV(100mVrms), f=1kHz, RL=10kΩ, unless otherwise specified) TEST CONDITION PARAMETER Maximum Input Voltage Output Noise INPUT SYMBOL OUT MODE SP HP VR VR L R PUT VIM1 f=1kHz THD=1% VIN 0 0 VIN L R Bypass - - - -2.0 (790) - VIM2 f=100Hz THD=1% VIN 0 0 VIN L R 2SP MAX - - -16.0 (160) - VIM3 f=100Hz THD=1% VIN 0 0 VIN L R HP - MAX - -16.0 (160) - VIM4 f=100Hz THD=1% VIN 0 L 1SP MAX - - -16.0 (160) - VIM5 f=100Hz THD=1% 0 VIN L 1SP MAX - - -14.5 (190) - VIM6 V+=1.8V,f=1kHz THD=1% VIN 0 0 VIN L R Bypass - - -10.5 (300) -8.5 (380) - VIM7 V+=1.8V,f=100Hz THD=1% VIN 0 0 VIN L R 2SP MAX - -24.5 (60) -22.5 (75) - VIM8 V+=1.8V,f=100Hz THD=1% VIN 0 0 VIN L R HP - MAX -24.5 (60) -22.5 (75) - + VIM9 V =1.8V,f=100Hz THD=1% VIN 0 L 1SP MAX - -24.5 (60) -22.5 (75) - VIM10 V+=1.8V,f=100Hz THD=1% 0 VIN L 1SP MAX - -23.0 (70) -21.0 (90) - VNO1 Rg=0Ω A-Weighted 0 0 L R Bypass - - - -112 (2.5) -106 (5.0) VNO2 Rg=0Ω A-Weighted 0 0 L R 1SP MAX - - -100 (10) -94 (20) VNO3 Rg=0Ω A-Weighted 0 0 L R HP - MAX - -100 (10) -94 (20) VNO4 Rg=0Ω A-Weighted 0 0 L 1SP MAX - - -100 (10) -94 (20) dBV (mVrms) dBV (µVrms) -3- NJM2705 ●AC CHARACTERISTICS + (V =3V, Ta=25°C, VIN=-20dBV(100mVrms), f=1kHz, RL=10kΩ, unless otherwise specified) TEST CONDITION PARAMETER Total Harmonic Distortion SYMBOL THD1 THD2 THD3 THD4 BYPASS Gain GVBYP Surround Gain GVSUR1 GVSUR2 GVSUR3 GVSUR4 GVSUR5 GVSUR6 GVSUR7 GVSUR8 INPUT OUT MODE SP HP VR VR MIN TYP MAX L R PUT f=1kHz VIN 0 0 VIN L R Bypass - - - 0.02 0.05 f=1kHz VIN 0 0 VIN L R 2SP MAX - - 0.1 0.5 f=1kHz VIN 0 0 VIN L R HP - MAX - 0.1 0.5 f=1kHz VIN 0 0 VIN L R 1SP MAX - - 0.1 0.5 f=1kHz VIN 0 0 VIN L R Bypass - - -1.0 0.0 1.0 f=100Hz VIN 0 0 VIN L R 2SP MAX - 12.5 14.5 16.5 f=100Hz VIN 0 0 VIN L R 2SP MIN - 0.5 2.5 4.5 f=100Hz VIN 0 0 VIN L R HP - MAX 12.5 14.5 16.5 f=100Hz VIN 0 0 VIN L R HP - MIN 0.5 2.5 4.5 f=100Hz VIN 0 L 1SP MAX - 6.5 8.5 10.5 f=100Hz 0 VIN L 1SP MAX - 2.0 4.0 6.0 f=100Hz VIN 0 L 1SP MIN - -5.5 -3.5 -1.5 f=100Hz 0 VIN L 1SP MIN - -12.0 -10.0 -8.0 UNIT % dB dB + ●CONTROL CHARACTERISTICS (V =3V, Ta=25°C unless otherwise specified) PARAMETER MODE Select Control Voltage MIN TYP MAX VIN=High Level TEST CONDITION 1.2 - V+ VIN=Low Level 0.0 - 0.3 SYMBOL VMODE ■SWITCH FUNCTION SURROUND FUNCTION SW MODE SW1 SW2 Bypass 2SP mode L, OPEN L, OPEN L, OPEN H Input Through Surround mode for narrow space two speakers NOTES HP mode 1SP mode H H L, OPEN H Surround mode for Headphone Surround mode for monaural speaker (Surround signal from LOUT) STANDBY SW MODE STBY Standby Active L, open H -4- NOTES IC is non-active IC is active UNIT V NJM2705 ■TERMINAL DESCRIPTION PIN No. FFP 16 PCSP 16 SSOP 16 SYMBOL FUNCTION EQUIVALENT CIRCUIT V+ V+ 5 6 LIN RIN Lch Input Rch Input 1.15V 400 400 6p 100k 4 3 6p 1 2 Voltage VREF V+ 2 1 12 4 3 14 LOUT ROUT LMON Lch Output Rch Output Filter terminal 20k 3 4 9 V+ V+ 1.15V 12k 6p 16 15 14 13 2 1 16 15 NFSPR NFHPR NFSPL NFHPL V+ 20k V+ 5 6 7 8 V+ Filter terminal Filter terminal Filter terminal Filter terminal 400 1.15V V+ 20k V+ 6p 11 13 PS Filter terminal 1.15V 400 400 6p 6p 10 -5- NJM2705 ■TERMINAL DESCRIPTION SSOP 16 SYMBOL FUNCTION EQUIVALENT CIRCUIT V+ 10 9 12 11 SW2 SW1 Mode control switch Mode control switch V+ 0V 700 25k 275k 11 12 V+ V+ 13 8 10 STBY Voltage 3p PCSP 16 V+ Standby switch 0V 75k 225k 700 3p PIN No. FFP 16 14 7 9 V+ Power Supply V+ 15 6 8 GND GND 0V 5 7 VREF Reference voltage V+ 1.15V 400 400 6p 300k 16 V+ 300k V+ -6- 6p NJM2705 ■APPLICATION CIRCUIT (FFP16) 1) 2SP mode, HP mode 11 10 9 SW2 PS LMON 13 STBY STBY NFHPL 8 10µ MAX MIN 0.0033µ 12 SW1 0.0047µ 1µ 0.027µ 100k SW2 1µ 100k SW1 HP VR 50kB NFSPL 7 14 V+ MAX 4.7k V+ NFHPR 6 16 VREF NFSPR 5 SP VR 50kB LIN RIN LOUT ROUT 1 2 3 4 0.0047µ 1µ 0.0033µ 4.7k 15 GND MIN Lch IN Rch OUT 0.1µ Rch IN Lch OUT 0.1µ 2) 1SP mode, HP mode 11 10 9 SW2 PS LMON 13 STBY STBY NFHPL 8 10µ MAX MIN 0.0033µ 12 SW1 0.0047µ 1µ 0.027µ 100k SW2 1µ 100k SW1 HP VR 50kB NFSPL 7 14 V+ MAX 4.7k V+ NFHPR 6 16 VREF NFSPR 5 MIN 1µ LIN RIN LOUT ROUT 1 2 3 4 0.0047µ 4.7k 15 GND SP VR 50kB Lch IN Rch OUT 0.1µ Rch IN Lch OUT 0.1µ Surround signal is outputted from LOUT terminal at 1SP mode. -7- NJM2705 ■APPLICATION CIRCUIT (PCSP16) 1) 2SP mode, HP mode 0.0047µ 0.0033µ MAX 100k SW1 1µ 1µ 100k 0.027µ SW2 12 11 10 9 LMON PS SW2 SW1 13 NFHPL STBY 8 14 NFSPL V+ 7 STBY HP VR 50kB SP VR 50kB V+ 15 NFHPR GND 6 16 NFSPR VREF 5 0.0033µ 0.0047µ 4.7k MIN 10µ MIN 4.7k MAX 1µ ROUT LOUT RIN LIN 1 2 3 4 Lch IN Rch OUT 0.1µ Rch IN Lch OUT 0.1µ 2) 1SP mode, HP mode 0.0047µ 0.0033µ MAX 100k SW1 1µ 1µ 100k 0.027µ SW2 12 11 10 9 LMON PS SW2 SW1 13 NFHPL STBY 8 14 NFSPL V+ 7 STBY HP VR MAX SP VR 50kB V+ 15 NFHPR GND 6 16 NFSPR VREF 5 0.0033µ 4.7k MIN 10µ MIN 4.7k 50kB 1µ ROUT LOUT RIN LIN 1 2 3 4 Lch IN Rch OUT 0.1µ Rch IN Lch OUT 0.1µ Surround signal is outputted from LOUT terminal at 1SP mode. -8- NJM2705 ■APPLICATION CIRCUIT (SSOP16) MAX MIN SP VR 50kB 1) 2SP mode, HP mode 4.7k 1 MIN MAX HP VR 50kB HFHPR 4.7k NFSPL 16 0.0047µ 0.0033µ 2 NFHPL 15 NFSPR 0.0033µ 0.0047µ Rch OUT 3 ROUT LMON 14 Lch OUT 4 LOUT PS 13 0.027µ Rch IN 5 RIN SW2 12 0.1µ SW2 100k 1µ Lch IN 6 LIN SW1 11 0.1µ SW1 100k 1µ 7 VREF 8 GND STBY 10 STBY 1µ 10µ V+ 9 V+ 2) 1SP mode, HP mode MIN MAX SP VR 50kB 4.7k 1 HFHPR MIN MAX HP VR 50kB 4.7k NFSPL 16 0.0047µ 0.0033µ 2 NFSPR NFHPL 15 0.0047µ Rch OUT 3 ROUT LMON 14 Lch OUT 4 LOUT PS 13 1µ 0.027µ Rch IN 5 RIN SW2 12 0.1µ SW2 100k 1µ Lch IN 6 LIN SW1 11 0.1µ SW1 100k 1µ 7 VREF 8 GND STBY 10 STBY 1µ 10µ V+ 9 V+ Surround signal is outputted from LOUT terminal at 1SP mode. -9- NJM2705 ■TYPICAL CHARACTERISTICS Operating Current vs. Temperature (STANDBY) Operating Current vs. Operating Voltage (STANDBY) V+=3V o Ta=25 C 20 1 15 Operating Current [µA] Operating Current [µA] 0.8 0.6 0.4 10 5 0.2 0 -50 0 0 1 2 3 4 5 6 7 -25 0 Operating Current vs. Operating Voltage (ACTIVE) 100 125 V+=3V 1000 800 800 600 Bypass,2SP,HP,1SP mode 400 Operating Current [µA] 1000 600 Bypass,2SP,HP,1SP mode 400 200 200 0 -50 0 0 1 2 3 4 5 6 7 -25 0 25 50 75 100 125 Ta [oC] Operating Voltage [V] Reference Voltage vs. Temperature Reference Voltage vs. Operating Voltage Ta=25oC V+=3V 3.5 1.3 3 1.25 2.5 Reference Voltage [V] Reference Voltage [V] 75 Operating Current vs. Temperature (ACTIVE) Ta=25oC 2 1.5 1 1.2 1.15 1.1 1.05 0.5 0 0 1 2 3 4 5 Operating Voltage [V] - 10 - 50 Ta [oC] Operating Voltage [V] Operating Current [µA] 25 6 7 1 -50 -25 0 25 50 Ta [oC] 75 100 125 NJM2705 ■TYPICAL CHARACTERISTICS Maximum Input Voltage vs. Operating Voltage (BYPASS) Maximum Input Voltage vs. Operating Voltage (2SP) Ta= 25oC, f=100Hz SP_VR=MAX, RL=10kΩ, THD=1% 10 -5 5 -10 Maximum Input Voltage [dBV] Maximum Input Voltage [dBV] f=1kHz, RL=10kΩ, THD=1%, Ta=25oC 0 Vin=Lch Vout=Lch Vin=Rch Vout=Rch -5 -10 -15 Vin=Lch Vout=Lch Vin=Rch Vout=Rch -20 -25 -15 0 1 2 3 4 5 6 -30 7 0 1 2 Operating Voltage [V] Maximum Input Voltage vs. Operating Voltage (HP) 5 6 7 Ta= 25oC, f=100Hz, SP_VR=MAX, RL=10kΩ, THD=1% Ta=25 C, f=100Hz, HP_VR=MAX, RL=10kΩ ,THD=1% -5 -5 -10 -10 Maximum Input Voltage [dBV] Maximum Input Voltage [dBV] 4 Maximum Input Voltage vs. Temperature (1SP) o -15 Vin=Lch Vout=Lch Vin=Rch Vout=Rch -20 3 Operating Voltage [V] -15 Vin=Lch Vout=Lch Vin=Rch Vout=Lch -20 -25 -25 -30 -30 0 1 2 3 4 5 6 0 7 1 2 3 4 5 6 7 Operating Voltage [V] Operating Voltage [V] Maximum Input Voltage vs. Temperature (BYPASS) Maximum Input Voltage vs. Temperature (2SP) V+=3V, f=1kHz, RL=10kΩ THD=1% V+=3V, f=100Hz, RL=10kΩ SP_VR=MAX, THD=1% 0 -15 Vin=Lch Vout=Lch -1 Maximum Input Voltage [dBV] Maximum Input Voltage [dBV] Vin=Lch Vout=Lch -2 Vin=Rch Vout=Rch -3 -4 -5 -50 -16 Vin=Rch Vout=Rch -17 -18 -19 -25 0 25 50 o Ta [ C] 75 100 125 -20 -50 -25 0 25 50 75 100 125 o Ta [ C] - 11 - NJM2705 ■TYPICAL CHARACTERISTICS Maximum Input Voltage vs. Temperrature (HP) Maximum Input Voltage vs. Temperature (1SP) V+=3V, f=100Hz, RL=10kΩ HP_VR=MAX, THD=1% -15 V+=3V, f=100Hz, RL=10kΩ SP_VR=MAX, THD=1% -12 -16 Maximum Input Voltage [dBV] Maximum Input Voltage [dBV] Vin=Lch Vout=Lch Vin=Rch Vout=Rch -17 -18 -19 -13 Vin=Rch Vout=Lch -14 -15 Vin=Lch Vout=Lch -16 -20 -50 -25 0 25 50 75 100 -17 -50 125 -25 0 o 75 100 125 Ta [ C] Output Noise Voltage vs. Temperature Output Noise Voltage vs. Temperature V+=3V, Rg=0Ω , Vout=Rch SP_VR=MAX, HP_VR=MAX, FILTER=A-Weighted V+=3V, Rg=0Ω , Vout=Lch SP_VR=MAX, HP_VR=MAX, FILTER=A-Weighted -90 -90 -95 -95 2SP mode Output Noise Voltage [dBV] Output Noise Voltage [dBV] 50 o Ta [ C] -100 HP mode -105 1SP mode -110 Bypass -115 -120 -50 25 -25 0 25 50 75 2SP mode -100 HP mode -105 -110 Bypass -115 100 -120 -50 125 -25 0 25 Ta [oC] 50 75 100 125 Ta [oC] Total Harmonic Distortion vs. Input Voltage (BYPASS) Total Harmonic Distortion vs. Input Voltage (2SP) V+=3V, Vin=Lch, f=1kHz, Vout=Lch RL=10k Ω , BW=10Hz-80kHz V+=3V, Vin=Lch, f=100Hz, Vout=Lch RL=10k Ω , BW=10Hz-80kHz, SP_VR=MAX 10 10 1 THD+N [%] THD+N [%] 1 Ta=75oC Ta=25 oC 0.1 Ta=-20oC 0.1 Ta=-20 oC Ta=25 oC Ta=75 oC 0.01 0.001 -50 -40 -30 -20 Input Voltage [dBV] - 12 - -10 0 0.01 -50 -40 -30 -20 Input Voltage [dBV] -10 0 NJM2705 ■TYPICAL CHARACTERISTICS Total Harmonic Distortion vs. Input Voltage (HP) Total Harmonic Distortion vs. Input Voltage (1SP) V+=3V, Vin=Lch, f=100Hz, Vout=Lch RL=10k Ω , BW=10Hz-80kHz, HP_VR=MAX V+=3V, Vin=Lch, f=100Hz, Vout=Lch RL=10k Ω , BW=10Hz-80kHz, SP_VR=MAX 10 1 1 THD+N [%] THD+N [%] 10 0.1 0.1 Ta=-20oC Ta=25oC Ta=-20oC Ta=75oC 0.01 -50 -40 -30 -20 -10 Ta=25oC Ta=75oC 0.01 -50 0 -40 Input Voltage [dBV] -30 -20 -10 0 Input Voltage [dBV] Frequency Responce (BYPASS) Frequency Responce (2SP) V+=3V, Vin=-20dBV Lch, Vout=Lch RL=10kΩ, Rg=25Ω, SP_VR=MAX V+=3V, Vin=-20dBV Lch, Vout=Lch RL=10kΩ, Rg=25Ω 20 1 Ta=75oC Ta=25oC 15 Ta=-20,25,75 oC Gain [dB] Gain [dB] 0.5 0 Ta=-20oC 10 5 -0.5 0 -1 10 100 1000 10 4 10 -5 5 10 100 1000 10 4 10 5 Frequency [Hz] Frequency [Hz] Frequency Responce (2SP) Phase vs. Frequency (2SP) V+=3V, Vin=-20dBV Lch, Vout=Lch RL=10kΩ, Rg=25Ω, SP_VR=MIN V+=3V, Vin=-20dBV, Lch+Rch RL=10kΩ, Rg=25Ω, SP_VR=MAX 90 20 15 10 Phase [dB] Gain [dB] 0 Ta=75oC Ta=25oC 5 Ta=-20,25,75 oC Vout=Rch -90 Ta=-20,25,75 oC Vout=Lch -180 0 Ta=-20 oC -5 10 100 1000 Frequency [Hz] 10 4 10 5 -270 10 100 1000 10 4 10 5 Frequency [Hz] - 13 - NJM2705 ■TYPICAL CHARACTERISTICS Frequency Responce (HP) Frequency Responce (HP) V+=3V, Vin=-20dBV Lch, Vout=Lch RL=10kΩ, Rg=25Ω, HP_VR=MAX V+=3V, Vin=-20dBV Lch, Vout=Lch RL=10kΩ, Rg=25Ω, HP_VR=MIN 20 20 Ta=75oC Ta=25oC 15 15 Gain [dB] Gain [dB] Ta=-20oC 10 5 0 -5 10 100 1000 10 4 10 10 5 Ta=75 oC Ta=25 oC 0 Ta=-20 oC -5 5 10 100 Frequency [Hz] 4 10 5 Frequency Responce (1SP) V+=3V, Vin=-20dBV, Vout=Lch RL=10kΩ, Rg=25Ω, SP_VR=MAX V+=3V, Vin=-20dBV, Vout=Lch RL=10kΩ,Rg=25 Ω, VR=MIN 15 10 Vin=Lch Ta=75oC Ta=25oC Ta=-20oC 10 5 5 Gain [dB] Gain [dB] 10 Frequency [Hz] Frequency Responce (1SP) 0 1000 Vin=Rch Ta=75 oC Ta=25 oC Ta=-20oC Vin=Lch Ta=75 oC Ta=25oC Ta=-20oC 0 -5 Vin=Rch Ta=-20oC Ta=25oC -5 -10 Ta=75oC -10 10 100 1000 Frequency [Hz] 10 4 10 5 -15 10 100 1000 10 4 10 5 Frequency [Hz] [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. - 14 -