NJM2794RB2

NJM2794 Ground Noise Isolation Amplifier s GENERAL DESCRIPTION The NJM2794 is a ground noise isolation amplifier designed for car audio system. 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. s PACKAGE OUTLINE NJM2794RB2 NJM2794V s FEATURES q Dual Channel Differential Amplifier q Operating Voltage q Operating Current q Common mode rejection ratio q Maximum Output Voltage q Supply Voltage Rejection Ratio q Total Harmonic Distortion q Noise Output Voltage q Bipolar Technology q Package Outline s BLOCK DIAGRAM 4.3 to 13V 14mA typ. CMRR=60dB typ. 2Vrms min., @ THD=0.1% 60dB typ. 0.002% typ. 1.3µVrms typ. TVSP10, SSOP14 V+ IN1OUT1 IN1+ Vref IN2+ IN2OUT2 GND –1– NJM2794 s PIN CONFIGURATION TVSP10 No. Symbol Function 1 10 5 6 1 2 3 4 5 6 7 8 9 10 OUT1 GND Vref V+ OUT2 IN2+ IN2NC IN1IN1+ Output1 Ground Reference Voltage Power Supply Output2 +Input2 -Input2 No Connect -Input1 +Input1 SSOP14 1 14 No. Symbol Function 7 8 1 2 3 4 5 6 7 8 9 10 11 12 13 14 OUT1 NC GND Vref V+ NC OUT2 IN2+ NC IN2NC IN1NC IN1+ Output1 No Connect Ground Reference Voltage Power Supply No Connect Output2 +Input2 No Connect -Input2 No Connect -Input1 No Connect +Input1 –2– NJM2794 s ABSOLUTE MAXIMUM RANGES PARAMETER Supply Voltage Maximum Input Voltage (Ta=25°C) RANGE +15 0 to V TVSP10 : 530* SSOP14 : 550* NOTE: EIA/JEDEC STANDARD Test board (76.2x114.3x1.6mm, 2layer, FR-4) mounting +(✴) SYMBOL V + UNIT V V VIM Power Dissipation Operating Temperature Storage Temperature PD Topr Tstg mW °C °C -40 to +85 -40 to +150 (✴) For the maximum input voltage less than 0 toV+ s ELECTRICAL CHARACTERRISTIC (V =9V,Ta=25°C) PARAMETER DC CHARACTERRISTIC Operating Voltage Operating Current Reference Voltage Voltage Gain Channel Separation Channel Balance Roll-off High Frequency Input Resistance Output Resistance Maximum Output Voltage 1 Maximum Output Voltage 2 Maximum Output Voltage 3 Maximum Output Voltage 4 Noise Output Voltage Total Harmonic Distortion Common Mode Rejection Ratio Common Mode Input Voltage Supply Voltage Rejection Ratio V + + SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT 4.3 No Signal 3.8 -1.0 f=1kHz 9 14 4.3 0.0 110 105 90 2.5 2.1 2.5 2.1 1.3 0.002 60 2 65 13 20 4.8 +1.0 0.5 125 2.5 0.01 - V mA V dB dB dB kHz kΩ Ω Vrms Vrms Vrms Vrms µVrms % dB Vrms dB ICC VREF AC CHARACTERRISTIC (Non-inverting circuit, f=1kHz, Vin=1Vrms, Rg=0Ω, RL=10kΩ unless otherwise specified) Gv CS BAL fRH RIN ROUT VOM1 VOM2 VOM3 VOM4 VNO THD CMRR Vicm SVR 90 100 85 - -1dB THD=0.1%, f = 1kHz THD=0.1%, f = 1kHz, V =8V Inverting, THD=0.1%, f = 1kHz Inverting, + THD=0.1%, f = 1kHz, V =8V Rg=600Ω, A-weighted f=1kHz , VO=1Vrms, BW=400Hz to 30kHz + 2 1.7 50 CMRR=50dB f=100Hz , Vripple=100mVrms 55 –3– NJM2794 ! TERMINAL DESCRIPTION PIN NO. TVSP 10 SSOP 14 SYMBOL FUNCTION EQUIVALENT CIRCUIT TERMINAL DC VOLTAGE V+ V+ 1 5 1 7 OUT1 OUT2 Output1 Output2 100 Ω FB V+x0.48 [V] 6 7 9 10 8 10 12 14 IN2+ IN2IN1IN1+ +Input2 -Input2 -Input1 +Input1 50 Ω V+x0.48 [V] 105kΩ Vref V+ V+ 260kΩ 100Ω V+ 3 4 Vref Reference Voltage 240kΩ V+x0.48 [V] –4– NJM2794 s APPLICATION CIRCUIT q TVSP10 (NJM2794RB2) OUT1 + OUT1 IN1+ 1 10 + IN1+ 3.3μF GND 0.33μF IN1- 2 9 + IN1- 0.33μF Vref 10μF V+ V+ 22μF + + NC 3 8 IN2- 4 7 + IN2- 0.33μF OUT2 + OUT2 IN2+ 5 6 + IN2+ 3.3μF 0.33μF q SSOP14 (NJM2794V) OUT1 + OUT1 IN1+ 1 14 + IN1+ 3.3μF NC NC 0.33μF 2 13 GND IN1- 3 12 + IN1- 0.33μF Vref 10μF V+ V+ 22μF + + NC 4 11 IN2- 5 10 + IN2- 0.33μF NC NC 6 9 OUT2 + OUT2 IN2+ 7 8 + IN2+ 3.3μF 0.33μF –5– NJM2794 s APPLICATION BLOCK DIAGRAM (1) Non-inverting line input IN+ OUT NJM2794 INIC GND Vref VN (2) Inverting line input INOUT NJM2794 IN+ IC GND Vref VN (3) Non-inverting line output IN+ OUT NJM2794 INIC GND Vref VN (4) Inverting line output INOUT NJM2794 IN+ IC GND Vref VN –6– NJM2794 ! TYPICAL CHARACTERISTICS Operating Current vs. Ambient Temperature V+=9V 30 30 25 20 15 10 5 0 -50 -25 0 25 50 75 100 125 150 Ambient Temperature [oC] 25 Operating Current [mA] Operating Current vs. Operating Voltage Operationg Current [mA] 20 25oC 15 10 5 0 0 3 6 9 12 15 Operating Voltage [V] Ta=85oC -40oC Reference Voltage vs. Ambient Temperature V+=9V 15 15 Reference Voltage vs. Operating Voltage 12 Reference Voltage [V] Reference Voltage [V] 12 9 9 6 6 Ta=85,25,-40oC 3 3 0 -50 -25 0 25 50 75 100 125 150 Ambient Temparature [oC] 0 0 3 6 9 12 15 Operating Voltage [V] Noise Output Voltage vs. Ambient Temperature V+=9V, Rg=600Ω, A-Weighted 0 Noise Output Voltage vs. Signal Source Resistance V+=9V, Ta=25oC, A-Weighted 0 Noise Output Voltage [dBV] -40 -60 -80 -100 -120 -140 -50 -25 0 25 50 75 100 125 150 Ambient Temperature [oC] Noise Output Voltage [dBV] -20 -20 -40 -60 -80 -100 -120 0.01 0.1 1 10 100 Signal Source Resistance [kΩ] –7– NJM2794 ! TYPICAL CHARACTERISTICS Channel Separation vs. Ambient Temperature V+=9V, Rg=600Ω, Vin=1Vrms, BW=400Hz-30kHz IN1+ -> OUT2 0 -20 -40 -60 -80 -100 -120 -50 -25 0 25 50 75 100 125 150 Ambient Temperature [oC] 0 -20 -40 -60 -80 -100 -120 10 100 1000 Frequency [Hz] IN1+ -> OUT2 IN2+ -> OUT1 10000 100000 Channel Separation vs. Frequency V+=9V, Rg=600Ω, Vin=1Vrms, BW=10Hz-30kHz Channel Separation [dB] THD+N vs. Output Voltage V+=9V, f=1kHz, Non-Inverting Circuit 1 1 Channel Separation [dB] THD+N vs. Output Voltage V+=9V, f=1kHz, Inverting Circuit 0.1 0.1 THD+N [%] THD+N [%] 0.01 Ta=25,85oC 0.01 Ta=-40,25,85oC Ta=-40oC 0.001 0.01 0.1 1 10 Output Voltage [Vrms] 0.001 0.01 0.1 1 10 Output Voltage [Vrms] THD+N vs. Output Voltage V+=8V, f=1kHz, Non-Inverting Circuit 1 1 THD+N vs. Output Voltage V+=8V, f=1kHz, Inverting Circuit 0.1 0.1 THD+N [%] THD+N [%] 0.01 Ta=25,85 C Ta=-40 C 0.001 0.01 0.1 1 10 Output Voltage [Vrms] o o 0.01 Ta=-40,25,85oC 0.001 0.01 0.1 1 10 Output Voltage [Vrms] –8– NJM2794 ! TYPICAL CHARACTERISTICS THD+N vs. Output Voltage V+=9V, Ta=25oC, Non-Inverting Circuit 1 1 THD+N vs. Output Voltage V+=9V, Ta=25oC, Inverting Circuit 0.1 THD+N [%] THD+N [%] 0.1 f=100Hz, 10kHz 0.01 f=100Hz, 1kHz,10kHz 0.01 0.001 0.01 0.1 1 Output Voltage [Vrms] f=1kHz 10 0.001 0.01 0.1 1 10 Output Voltage [Vrms] THD+N vs. Output Voltage V+=9V, Vin=1Vrms, BW=22Hz-80kHz, Inverting Circuit 1 THD+N vs. Output Voltage V+=9V, Vin=1Vrms, BW=22Hz-80kHz, Non-Inverting Circuit 1 0.1 THD+N [%] THD+N [%] 0.1 0.01 Ta=-40,25,85oC 0.01 Ta=-40,25,85oC 0.001 10 100 1000 Frequency [Hz] 10000 100000 0.001 10 100 1000 Frequency [Hz] 10000 100000 Maximum Output Voltage vs. Operating Voltage f=1kHz, THD=0.1%, Non-Inverting Circuit 4 Maximum Output Voltage [Vrms] Maximum Output Voltage [Vrms] 4 Maximum Output Voltage vs. Operating Voltage f=1kHz, THD=0.1%, Inverting Circuit 3 3 2 Ta=-40,25,85oC 2 Ta=-40,25,85oC 1 1 0 0 3 6 9 12 15 Operating Voltage [V] 0 0 3 6 9 12 15 Operating Voltage [V] –9– NJM2794 ! TYPICAL CHARACTERISTICS Maximum Output Voltage vs. Load Resistance V+=9V, f=1kHz, Ta=25oC, BW=400 - 30kHz 5 Maximum Output Voltage [Vrms] THD=0.1% 10 8 4 Voltage Gain [dB] V+=13V 3 9V 6 4 2 0 -2 -4 -6 4.3V 0 0.1 1 10 100 Load Resistance [kΩ] Reference Voltage Turn-on behaviour V+=9V, Ta=25℃ 4.5 Supply Voltage Rejection Ratio [dB] 4 Reference Voltage [V] 3.5 3 2.5 2 1.5 1 0.5 0 0 1 2 3 4 5 6 7 8 9 10 time [sec] Cref=10µF Cref=22µF Cref=4.7µF 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 10 100 1000 Frequency [Hz] 10000 100000 Cref=22µF Cref=4.7µF Cref=10µF -8 -10 10 100 1000 Frequency [Hz] Supply Voltage Rejection Ratio vs. Frequency V+=9V, Vripple=100mV, Rg=600 Ω, Ta=25℃ 10000 100000 Non-Inverting Circuit, Inverting Circuit Voltage Gain vs. Frequency V+=9V, Vin=1Vrms, Ta=25oC 2 1 Supply Voltage Rejection Ratio vs. Signal Source Resistance V+=9V, Vrippple=100mV, f=100Hz, Ta=25oC 0 Supply Voltage Rejection Ratio vs. Operating Voltage Vripple=100mV, f=100Hz, Rg=600Ω, Ta=25oC 0 Supply Voltage Rejection Ratio [dB] -20 -30 -40 -50 -60 -70 -80 -90 -100 0.1 1 10 100 Signal Source Resistance [kΩ] Supply Voltage Rejection Ratio [dB] -10 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 0 3 6 9 12 15 Operating Voltage [V] – 10 – NJM2794 ! TYPICAL CHARACTERISTICS Common Mode Rejection Ratio vs. Frequency V+=9V, Vin=1Vrms 0 Common Mode Rejection Ratio [dB] Common Mode Rejection Ratio [dB] Common Mode Rejection Ratio vs. Input Voltage V+=9V, f=1kHz, Ta=25oC, BW=400 - 30kHz 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 0.001 0.01 0.1 Input Voltage [Vrms] 1 10 85oC Ta=-40oC 25oC -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 10 100 1000 Frequency [Hz] 10000 100000 Ta=85 C o 25oC Ta=-40oC [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 –