NJM2754 4in-1out Audio Selector with Isolation amplifier ! GENERAL DESCRIPTION The NJM2754 is 4In-1out stereo audio Selector with ground noise isolation amplifiers. It contains dual channel differential amplifier. It is developed for those car audio applications where long connections between head unit and other components are necessary and ground noise has to be eliminated. ! FEATURES •4in-1out Stereo Audio Selector •Operating Voltage •Operating Current •Common mode rejection ratio •Maximum Output Voltage •Supply Voltage Rejection Ratio •Total Harmonic Distortion •Noise Output Voltage •Bipolar Technology •Package Outline ! PACKAGE OUTLINE NJM2754V 4.3 to 12V 14mA(typ.) CMRR=60dB typ. 2Vrms min., @ THD=0.1% 60dB typ. 0.003% typ. 1.7µVrms typ. SSOP20 ! BLOCK DIAGRAM IN1A+ IN1A- Diff IN1B+ IN1B- CNT1 LOGIC CNT2 Diff IN2A+ Diff OUTA IN2IN2B+ IN3A+ Diff Diff IN3IN3B+ OUTB Diff Ach IN4A+ Diff IN4IN4B+ Ver.2008-06-23 V＋ ＋ Bch Diff Vref Vref GND –1– NJM2754 !PIN CONFIGURATION No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 –2– SYMBOL OUTA OUTB IN1A+ IN1AIN1BIN1B+ CNT1 IN2A+ IN2IN2B+ IN3B+ IN3IN3A+ CNT2 IN4B+ IN4IN4A+ GND Vref V+ OUTA V+ 20 2 OUTB Vref 19 3 IN1A+ GND 18 4 IN1A- IN4A+ 17 5 IN1B- IN4- 16 6 IN1B+ IN4B+ 15 7 CNT1 CNT2 14 8 IN2A+ IN3A+ 13 9 IN2- IN3- 12 10 IN2B+ IN3B+ 11 NJM2754 1 FUNCTION Ach Output Bch Output Ach +Input 1 Ach -Input1 Bch -Input1 Bch +Input 1 CONTROL 1 Ach +Input 2 -Input2 Bch +Input 2 Bch +Input 3 -Input3 Ach +Input 3 CONTROL 2 Bch +Input 4 -Input4 Ach +Input 4 Ground Reference Voltage Power Supply NJM2754 !ABSOLUTE MAXIMUM RANGES (Ta=25°C) PARAMETER SYMBOL RANGE UNIT +15 V + Supply Voltage V Maximum Input Voltage VIM Power Dissipation PD +(∗) 0 to V SSOP20 : 700(1) 950(2) V mW (1)EIA/JEDEC STANDARD Test board (76.2x114.3x1.6mm, 2layer, FR-4) mounting (2) EIA/JEDEC STANDARD Test board (76.2x114.3x1.6mm, 4layer, FR-4) mounting Operating Temperature Topr -40 to +85 °C Storage Temperature Tstg -40 to +150 °C !ELECTRICAL CHARACTERRISTIC (V+=9V,Ta=25°C) PARAMETER TEST CONDITION SYMBOL MIN. TYP. MAX. UNIT 4.3 9 12 V - 14 20 mA 3.8 4.3 4.8 V DCCHARACTERRISTIC + Operating Voltage V Operating Current ICC Reference Voltage VREF No Signal AC CHARACTERRISTIC (Non-inverting circuit, f=1kHz, Vin=1Vrms, Rg=0Ω, RL=10kΩ unless otherwise specified Voltage Gain Gv Cross Talk CT Channel Separation CS Channel Balance BAL -1.0 0.0 +1.0 dB f=1kHz,A-Weighted 100 110 - dB f=1kHz,A-Weighted 90 110 - dB - - 0.5 dB 100 - - kHz Roll-off High Frequency fRH Input Resistance RIN 85 105 125 kΩ Output Resistance ROUT - 90 - Ω Maximum Output Voltage VOM THD=0.1%, f = 1kHz 2 2.5 - Vrms Noise Output Voltage VNO - 1.7 2.5 µVrms Total Harmonic Distortion THD Rg=600Ω, A-weighted f=1kHz , VIN=1Vrms, BW=400Hz to 30kHz - 0.003 0.01 % 50 60 - dB - 2 - Vrms dB Common Mode Rejection Ratio Common Mode Input Voltage Supply Voltage Rejection Ratio -1dB CMRR Vicm CMRR=50dB SVR f=100Hz , Vripple=100mVrms 55 65 - Switch-ON Voltage Level VCH VCNT=High Level 2.3 - V + V Switch-OFF Voltage Level VCL VCNT=Low Level - - 0.8 V –3– NJM2754 !SWITCH CONTROL LOGIC CNT2 CNT1 Input Ach / Bch L L 1 L H 2 H L 3 H H 4 –4– NJM2754 !APPLICATION CIRCUIT 10µF 1 OUTA V+ 20 2 OUTB Vref 19 3 IN1A+ 4 IN1A- 5 IN1B- 6 IN1B+ 7 CNT1 8 IN2A+ 9 IN2- 10 IN2B+ 10µF 10µF 10µF 10µF 10µF 10µF NJM2754 10µF 10µF GND 18 IN4A+ 17 IN4- 16 IN4B+ 15 CNT2 14 IN3A+ 13 IN3- 12 IN3B+ 11 10µF 10µF 10µF 10µF 10µF 10µF 10µF 10µF –5– NJM2754 !TYPICAL CHARACTERISTICS ICC vs Supply Voltage Vref vs Supply Voltage No signal No signal, T=105,85,50,25,-20,-40oC 16 7 14 6 12 5 o Vref [V] ICC [mA] 10 105 C 8 o 85 C 6 4 3 o 50 C 4 2 o 25 C o 1 -20 C o -40 C 2 0 0 2 4 0 6 8 10 12 0 2 4 6 8 Supply Voltage [V] Volume Gain output vs Frequency V+=9V, Vin=1Vrms, INA1-Aout, Inverting circuit 10 10 8 8 6 6 4 4 2 0 -2 T=105,85,50,25,-20,-40oC 2 0 -2 -4 -4 -6 -6 -8 -8 -10 10 100 1000 10000 100000 10 100 1000 10000 100000 Frequancy [Hz] Frequency [Hz] Maximum Output Voltage vs Supply Voltage Maximum Output Voltage vs Supply Voltage V=+9V, THD=0.1%, I/O: INA1-Aout, Reversing circuit V=+9V, THD=0.1%, INA1-Aout, Non-Inverting circuit, T=105,85,50,25,-20,-40oC T=105,85,50,25,-20,-40oC 4.0 4.0 3.5 3.5 Maximum Output Voltage [Vrms] Maximum Output Voltage [Vrms] 12 Gain Output vs Frenquancy -10 3.0 2.5 2.0 1.5 1.0 3.0 2.5 2.0 1.5 1.0 0.5 0.5 0.0 0.0 4 5 6 7 8 9 Supply Voltage [V] –6– 10 V+=9V, Vin=1Vrms, INA1-Aout, Non-Inverting circuit T=105,85,50,25,-20,-40oC Gain Output [dB] Gain Output [dB] Supply Voltage [V] 10 11 12 4 5 6 7 8 9 Supply Voltage [V] 10 11 12 NJM2754 !TYPICAL CHARACTERISTICS CMR vs Frequancy CMR vs Input Voltage V+=9V, Vin=1Vrms, OUTA, T=105,85,50,25,-20,-40oC V+=9V, f=1kHz, BW:400Hz-30kHz, OUTA, T=105,85,50,25,-20,-40oC 0 -40 o -40 C -45 -20 C -50 25 C CMR [dB] 50,-105 C -60 -65 -70 o 85,105 C -60 -80 -80 -85 -90 -100 0.001 -90 10000 o 50 C -50 -70 1000 o 25 C -40 -75 100 o -20 C -30 o 10 o -40 C -20 o -55 CMR [dB] -10 o 100000 0.01 1 Channel Separation vs Frequency Channel Separation vs Frequency V=+9V, Vin=1Vrms, BW:10-80kHz, I/O: INB1+-outA, V=+9V, Vin=1Vrms, BW:10-80kHz, I/O: INB1--outA, Non-reversing circuit,T=105,85,50,25,-20,-40oC Reversing circuit,T=105,85,50,25,-20,-40oC 0 -20 -20 Channel Separation[dB] 0 -40 Rg=5.1kΩ Rg=3.3kΩ -60 Rg=620Ω -80 Rg=5.1kΩ -40 Rg=3.3kΩ -60 Rg=620Ω -80 -100 -100 Rg=0Ω Rg=0Ω -120 -120 10 100 1000 10000 10 100000 100 1000 Cross Talk vs Frequency V=+9V, Vin=1Vrms, BW:10-80kHz,Reversing circuit II/O: INA2-,INA3-,INA4-,/OutA, T=105,85,50,25,-20,-40oC I/O: INA2+,INA3+,INA4+,/OutA, T=105,85,50,25,-20,-40oC -40 -40 Rg=5.1kΩ Rg=5.1kΩ -60 Rg=3.3kΩ Cross Talk[dB] Rg=3.3kΩ Rg=620Ω -80 100000 Cross Talk vs Frequency V=+9V, Vin=1Vrms, BW:10-80kHz,Non-reversing circuit -60 10000 Frequency [Hz] Frequency [Hz] Cross Talk[dB] 10 Input Voltage [Vrms] Freequancy [Hz] Channel Separation[dB] 0.1 Rg=620Ω -80 -100 -100 Rg=0Ω Rg=0Ω -120 -120 10 100 1000 Frequency [Hz] 10000 100000 10 100 1000 10000 100000 Frequency [Hz] –7– NJM2754 !TYPICAL CHARACTERISTICS THD+N vs Input Voltage (Non-reversing circuit) THD+N vs Input Voltage (Reversing circuit) V=+9, BW:10-22kHz(f=100Hz), 400-30kHz(f=1kHz, 10kHz), V=+9V, BW:10-22kHz(f=100Hz), 400-30kHz(f=1kHz, 10kHz), I/O: INA1-,/OutA, T=105,85,50,25,-20,-40oC o I/O: INA1+,/OutA, T=105,85,50,25,-20,-40 C 10 10 1 1 f=100Hz 0.1 THD+N [%] THD+N [%] f=100Hz f=1kHz,10kHz f=1kHz,10kHz 0.1 0.01 0.01 0.001 0.01 0.1 1 0.001 0.01 10 0.1 1 10 Input Voltage [Vrms] Input Voltage [Vrms] RippleRejection vs Frequency THD+N vs Frequency Vrp=100mV, f=100Hz, Rg=600Ω,V+=9V, T=25oC V= +9V, f=1kHz, BW:10-80kHz, Vin=1Vrms , o I/O: INA1-1Aout, T=105,85,50,25,-20,-40 C 0 10 -10 -20 Ripple Rejection [dB] THD+N [%] 1 Reversing circuit 0.1 Non-reversing circuit 0.01 -30 -40 -50 -60 0.001 -70 0.0001 -80 10 100 1000 10000 100000 10 RippleRejection vs Signal source resistance V+=9V, Vrp=100mV, f=100Hz, T=25oC 0 -10 -10 -20 -20 -30 -30 Ripple Rejection [dB] Ripple Rejection [dB] 10000 Vrip=100mV, f=100Hz, T=25oC -40 -50 -60 -70 -50 -60 -70 -80 -90 -90 5 10 Supply Voltage [V] 100000 -40 -80 -100 –8– 1000 RippleRejection vs Supply Voltage 0 0 100 Frequency [Hz] Frequency [Hz] 15 -100 0.1 1 10 Signal source resistance [kΩ] 100 NJM2754 !TYPICAL CHARACTERISTICS NOISE vs Signal source resistance Output Voltage vs Load Resistance V=+9V, A-Weighting, f=1kHz, T=25oC, Non-Inverting V= +9V, f=1kHz, I/O: INA1-outA T=105,85,50,25,0,-20,-40oC 0 10 8 Maximum Output Voltage [Vrms] Output Noise [dBV] -20 -40 -60 -80 -100 6 4 2 0 -2 -4 -6 -8 -10 -120 0.1 1 10 Signal source resistance [kΩ] 100 100 1000 10000 100000 RL[Ω] [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. –9–