NJM2708

NJM2708 Sound Enhancement Audio Processor for Compression Audio ■GENERAL DESCRIPTION The NJM2708 is a sound enhancement audio processor designed for compression audio. It includes mode control switch (sound enhancement mode / Bypass mode), standby function and realizes low consumption power design by standby function. It is suitable for portable audio, car audio & home audio applications. ●PACKAGE OUTLINE ■FEATURES ● Operating Voltage ● Low Operating Circuit NJM2708V +1.8 to +13 V 0.75 mA typ.(at Sound enhancement mode VR: Max.) 0.1µA typ. (at Standby mode) ● Low output noise -100dBV typ.(at Sound enhancement mode VR: Max.) ● Low THD 0.005% typ. ● Variable Surround Effect by external resistor ● Standby function ● Internal Mode Control Switch ● Bipolar Technology ● Package Outline SSOP14 ■PIN CONFIGURATION 1 2 3 4 5 6 7 (SSOP14) 14 13 12 11 10 9 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 Ver.0.1E –1– NJM2708 ■BLOCK DIAGRAM (SSOP14) STBY SW 1 BIAS BYPASS 14 NC LIN 2 REBIRTH FILTER BYPASS 13 LOUT RIN 3 REBIRTH FILTER 12 ROUT MODE SW 4 11 NFL VREF 5 V+ 10 NFR GND 6 9 V+ NC 7 8 DNC –2– NJM2708 ■ABSOLUTE MAXIMUM RATING (Ta=25°C) PARAMETER SYMBOL Power Supply Voltage Power Dissipation O perating Temperature Range Storage Temperature Range V+ PD Topr Tstg RATING 14 400 NOTE: EIA/JEDEC STANDARD Test board (76.2x114.3x1.6mm, 2layer, FR-4) mounting UNIT V mW °C °C -40 ~ +85 -40 ~ +125 ■OPERATING VOLTAGE PARAMETER Operating Voltage SYMBOL V+ TEST CONDITION MIN. 1.8 TYP. 9.0 MAX. 13 UNIT V ■ELECTRICAL CHARACTERISTICS (Ta=25°C, V+=9V, unless otherwise specified) TEST CONDITION PARAMETER SYMBOL INPUT L 0 R 0 0 0 0 Active Standby eala Rebirth Max 3.65 750 0.1 750 4.15 1300 1.0 1300 4.65 V µA MIN OUTPUT Mode VR TYP MAX UNIT Supply Current ICC No Signal 0 0 Reference Voltage VREF No Signal 0 ■AC CHARACTERISTICS (Ta=25°C, V+=9V, Vin= 1.5Vrms,f=1kHz,RL=10kΩ,unless otherwise specified) TEST CONDITION PARAMETER SYMBOL INPUT L f=1kHz THD=1% f=1kHz THD=1% VIN VIN VIN VIN 0 R VIN VIN VIN VIN 0 L R L R L R L R L R L R L R L R eala Rebirth Bypass eala Rebirth Bypass eala Rebirth Bypass eala Rebirth MAX 1.5 2.7 Vrms 2.2 3.0 Bypass 2.2 3.0 - MIN OUTPUT Mode VR TYP MAX UNIT Maximum Input Voltage VIM f=10kHz THD=1% f=10kHz THD=1% Rg=0Ω A-Weighted MAX 1.0 1.6 -112 (2.5) -100 (10) 0.002 -106 (5.0) -94 (20) 0.01 % - - Output Noise VNO Rg=0Ω A-Weighted VIN=1.5Vrms f=1kHz 0 VIN VIN 0 VIN VIN dBV (µVrms) MAX - Total Harmonic Distortion - - THD+N VIN=0.75Vrms f=10kHz MAX - 0.1 - –3– NJM2708 TEST CONDITION PARAMETER SYMBOL INPUT L R VIN VIN L R L R eala Rebirth MAX 3.0 5.0 7.0 dB Bypass -1.0 0.0 1.0 dB MIN OUTPUT Mode VR TYP MAX UNIT Bypass Gain eala Rebirth Gain GVBYP VIN=1.5Vrms f=1kHz VIN=0.75Vrms f=10kHz VIN VIN - Geala ■CONTROL CHARACTERISTICS (Ta=25°C, V+=9V, unless otherwise specified) PARAMETER Mode Select Control Voltage SYMBOL VMODE TEST CONDITION VIN=High Level VIN=Low Level MIN. 1.2 0.0 TYP. - MAX. V + UNIT V V 0.3 ■SWITCH FUNCTION MODE SW MODE Bypass eala Rebirth STANDBY SW MODE Standby Active SW L, open H NOTES IC is non-active IC is active SW L, open H NOTES Input Through eala Rebirth(Stereo Input) –4– NJM2708 ■ APPLICATION CIRCUIT 1 10uF+ Lch Input 10uF+ Rch Input 100kΩ 3 4 5 6 7 2 STANDBY SW LIN RIN MODE SW VREF GND NC NC 14 + 10uF LOUT 13 + 10uF ROUT 12 2.2nF NFL 11 NFR 10 V+ DNC 9 100uF 8 + +9V 22kΩ MIN MAX VR:10kΩ Rch Output Lch Output + 1uF + 10uF –5– NJM2708 ■ TERMINAL DESCRIPTION (Ta=25°C, V =9V) + PIN No. SYMBOL FUNCTION EQUIVALENT CIRCUIT V+ V+ Voltage 1 STANDBY SW Standby Switch 700 75k 225k 0V V+ V+ V+ 2 3 LIN RIN Lch Input Rch Input 4.15V 700 100k VREF V+ V+ V+ 4 MODE SW Mode Control Switch 700 300k 0V V+ V+ V+ 5 VREF Reference Voltage 300k 300k 4.15V –6– NJM2708 ■ TERMINAL DESCRIPTION (Ta=25°C, V =9V) + PIN No. SYMBOL FUNCTION EQUIVALENT CIRCUIT Voltage 7 14 NC No Connect - 8 DNC Do Not Connect - 9 V+ Power Supply V+ V+ V+ 10 11 NFR NFL Rch Filter Terminal Lch Filter Terminal 20k 4.15V 400 V+ V+ V+ V+ 20k 12 13 ROUT LOUT Rch Output Lch Output 12k 4.15V –7– NJM2708 [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. –8–