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. It is suitable for PDA and portable game. PACKAGE OUTLINE NJM2705V FEATURES Operating Voltage Operating Current 1.8 to 6V 0.7mA typ. at Active mode 1A max. at Standby mode Low Output Noise 10Vrms 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 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 SSOP16 (Top View) -2- 1 16 2 15 3 14 4 13 5 12 6 11 7 10 8 9 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 NJM2705 ABSOLUTE MAXIMUM RATING (Ta=25C) PARAMETER Supply Voltage Power Dissipation Operating Temperature Range Storage Temperature Range SYMBOL + V PD Topr Tstg RATINGS 7 300 -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=25C 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 A 0 0 - - 1.0 1.15 1.3 V MIN TYP MAX UNIT Active AC CHARACTERISTICS + (V =3V, Ta=25C, VIN=-20dBV(100mVrms), f=1kHz, RL=10k, 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=0 A-Weighted 0 0 L R Bypass - - - -112 (2.5) -106 (5.0) VNO2 Rg=0 A-Weighted 0 0 L R 1SP MAX - - -100 (10) -94 (20) VNO3 Rg=0 A-Weighted 0 0 L R HP - MAX - -100 (10) -94 (20) VNO4 Rg=0 A-Weighted 0 0 L 1SP MAX - - -100 (10) -94 (20) dBV (mVrms) dBV (Vrms) -3- NJM2705 AC CHARACTERISTICS + (V =3V, Ta=25C, VIN=-20dBV(100mVrms), f=1kHz, RL=10k, 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=25C 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. SYMBOL FUNCTION EQUIVALENT CIRCUIT V+ V+ Lch Input Rch Input 1.15V 400 400 6p 100k LIN RIN 6p 5 6 Voltage VREF V+ LOUT ROUT LMON Lch Output Rch Output Filter terminal 20k 4 3 14 V+ V+ 1.15V 12k 6p NFSPR NFHPR NFSPL NFHPL V+ 20k V+ 2 1 16 15 V+ Filter terminal Filter terminal Filter terminal Filter terminal 400 1.15V V+ 20k V+ 6p PS Filter terminal 1.15V 400 400 6p 6p 13 -5- NJM2705 TERMINAL DESCRIPTION FUNCTION EQUIVALENT CIRCUIT V+ SW2 SW1 Mode control switch Mode control switch V+ 0V 700 25k 275k 12 11 V+ V+ 10 STBY V+ Standby switch 0V 75k 225k 700 9 V+ Power Supply V+ 8 GND GND 0V VREF Reference voltage V+ 1.15V 400 400 6p 300k 7 V+ 300k V+ -6- Voltage 3p SYMBOL 3p PIN No. 6p NJM2705 APPLICATION CIRCUIT 1) 2SP mode, HP mode MIN MAX SP VR 50kB 4.7k 1 MIN MAX HP VR 50kB HFHPR 4.7k NFSPL 16 0.0047 0.0033 2 NFHPL 15 NFSPR 0.0033 0.0047 Rch OUT 3 ROUT LMON 14 Lch OUT 4 LOUT PS 13 0.027 Rch IN 5 RIN SW2 12 0.1 SW2 100k 1 Lch IN 6 SW1 SW1 11 LIN 0.1 100k 1 7 VREF 8 GND STBY 10 STBY 1 10 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 0.0047 0.0033 2 NFSPR NFHPL 15 0.0047 Rch OUT 3 ROUT LMON 14 Lch OUT 4 LOUT PS 13 1 0.027 Rch IN 5 RIN SW2 12 0.1 SW2 100k 1 Lch IN 6 LIN SW1 11 0.1 SW1 100k 1 7 VREF 8 GND STBY 10 STBY 1 10 V+ 9 V+ Surround signal is outputted from LOUT terminal at 1SP mode. -7- NJM2705 TYPICAL CHARACTERISTICS Operating Current vs. Operating Voltage (STANDBY) Operating Current vs. Temperature (STANDBY) V+=3V o Ta=25 C 20 1 15 Operating Current [A] Operating Current [A] 0.8 0.6 0.4 10 5 0.2 0 -50 0 0 1 2 3 4 5 6 7 -25 0 25 75 100 125 Ta [ C] Operating Voltage [V] Operating Current vs. Operating Voltage (ACTIVE) Operating Current vs. Temperature (ACTIVE) V+=3V o Ta=25 C 1000 1000 800 600 Bypass,2SP,HP,1SP mode 400 Operating Current [A] 800 Operating Current [A] 50 o 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 o Ta [ C] Operating Voltage [V] Reference Voltage vs. Temperature Reference Voltage vs. Operating Voltage V+=3V Ta=25oC 3.5 1.3 1.25 2.5 Reference Voltage [V] Reference Voltage [V] 3 2 1.5 1 1.15 1.1 1.05 0.5 0 0 1 2 3 4 5 Operating Voltage [V] -8- 1.2 6 7 1 -50 -25 0 25 50 o Ta [ C] 75 100 125 NJM2705 TYPICAL CHARACTERISTICS Maximum Input Voltage vs. Operating Voltage (2SP) Maximum Input Voltage vs. Operating Voltage (BYPASS) Ta= 25 oC, f=100Hz SP_VR=MAX, RL=10k, THD=1% 10 -5 5 -10 Maximum Input Voltage [dBV] Maximum Input Voltage [dBV] f=1kHz, RL=10k, 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] 5 6 7 Maximum Input Voltage vs. Temperature (1SP) Ta= 25oC, f=100Hz, SP_VR=MAX, RL=10k, THD=1% Ta=25oC, f=100Hz, HP_VR=MAX, RL=10k,THD=1% -5 -5 -10 -10 Maximum Input Voltage [dBV] Maximum Input Voltage [dBV] 4 Operating Voltage [V] Maximum Input Voltage vs. Operating Voltage (HP) -15 Vin=Lch Vout=Lch Vin=Rch Vout=Rch -20 3 -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=10k THD=1% V+=3V, f=100Hz, RL=10k 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] -9- NJM2705 TYPICAL CHARACTERISTICS Maximum Input Voltage vs. Temperature (1SP) Maximum Input Voltage vs. Temperrature (HP) V+=3V, f=100Hz, RL=10k HP_VR=MAX, THD=1% V+=3V, f=100Hz, RL=10k SP_VR=MAX, THD=1% -12 -15 -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 25 o Ta [ C] 75 100 125 Ta [ C] Output Noise Voltage vs. Temperature Output Noise Voltage vs. Temperature V+=3V, Rg=0, Vout=Lch SP_VR=MAX, HP_VR=MAX, FILTER=A-Weighted V+=3V, Rg=0, Vout=Rch 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 -100 HP mode -105 1SP mode -110 Bypass -25 0 25 50 75 HP mode -105 -110 Bypass -115 -115 -120 -50 2SP mode -100 100 -120 -50 125 -25 0 25 50 75 100 125 Ta [oC] 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, BW=10Hz-80kHz V+=3V, Vin=Lch, f=100Hz, Vout=Lch RL=10k, BW=10Hz-80kHz, SP_VR=MAX 10 10 1 THD+N [%] THD+N [%] 1 Ta=75 oC Ta=25 oC 0.1 Ta=-20 oC 0.1 Ta=-20 oC Ta=25 oC Ta=75 oC 0.01 0.001 -50 -40 -30 -20 Input Voltage [dBV] - 10 - -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, BW=10Hz-80kHz, HP_VR=MAX V+=3V, Vin=Lch, f=100Hz, Vout=Lch RL=10k, BW=10Hz-80kHz, SP_VR=MAX 10 1 1 THD+N [%] THD+N [%] 10 0.1 0.1 Ta=-20 oC Ta=25oC Ta=-20 oC Ta=75 oC 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 (2SP) Frequency Responce (BYPASS) V+=3V, Vin=-20dBV Lch, Vout=Lch RL=10k, Rg=25, SP_VR=MAX V+=3V, Vin=-20dBV Lch, Vout=Lch RL=10k, Rg=25 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 -5 -1 10 100 1000 10 4 10 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=10k, Rg=25, SP_VR=MIN V+=3V, Vin=-20dBV, Lch+Rch RL=10k, Rg=25 , 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] - 11 - NJM2705 TYPICAL CHARACTERISTICS Frequency Responce (HP) Frequency Responce (HP) V+=3V, Vin=-20dBV Lch, Vout=Lch RL=10k, Rg=25, HP_VR=MAX V+=3V, Vin=-20dBV Lch, Vout=Lch RL=10k, Rg=25, 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=10k, Rg=25, SP_VR=MAX V+=3V, Vin=-20dBV, Vout=Lch RL=10k,Rg=25 , VR=MIN 15 10 Vin=Lch Ta=75 oC 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=25 oC Ta=-20oC 0 -5 Vin=Rch Ta=-20 oC Ta=25 oC -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. - 12 - Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: NJR: NJM2705SD3-TE1 NJM2705V-TE2