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| NJM2902 QUAD SINGLE-SUPPLY OPERATIONAL AMPLIFIER GENERAL DESCRIPTION The NJM2902 consists of four independent high-gain operational amplifiers that are designed for single-supply operation. Operation from split power supplies is also possible and the low power supply drain is independent of the magnitude of the power supply voltage. Used with a dual supply the circuit will operate over a wide range of supply voltages. However, a large amount of crossover distortion may occur with loads to ground. An external current-sinking resistor to-VS will reduce crossover distortion. There is no crossover distortion problem in single-supply operation if the load is direct-coupled to ground. FEATURES Single Supply Operating Voltage High Output Voltage Slew Rate Low Operating Current Package Outline Bipolar Technology PIN CONFIGURATION PIN FUNCTION 1.A OUTPUT 2.A -INPUT 3.A +INPUT + 4.V 5.B +INPUT 6.B -INPUT 7.B OUTPUT NJM2902N NJM2902M NJM2902V 8.C OUTPUT 9.C -INPUT 10.C +INPUT 11.GND 12.D +INPUT 13.D -INPUT 14.D OUTPUT PACKAGE OUTLINE NJM2902N NJM2902M NJM2902V ( +3V~+30V ) ( V+-2V ) ( 0.5V/s typ. ) ( 1mA typ. ) DIP14,DMP14,SSOP14 EQUIVALENT CIRCUIT ( 1/4 Shown ) Ver.2003-03-20 -1- NJM2902 ABSOLUTE MAXIMUM RATINGS ( Ta=25C ) PARAMETER Supply Voltage Differential Input Voltage Input Voltage Power Dissipation Operating Temperature Range Storage Temperature Range SYMBOL ++V (V /V ) VID VIC PD Topr Tstg RATINGS 32 ( or 16 ) 32 -0.3~+32 ( DIP14 ) 570 ( DMP14 ) 300 ( SSOP14 ) 300 -40~+85 -50~+125 UNIT V V V mW C C ELECTRICAL CHARACTERISTICS ( Ta=25C,V+=5V ) PARAMETER Input Offset Voltage Input Offset Current Input Bias Current Large Signal Voltage Gain Maximum Output Voltage Swing Input Common Mode Voltage Range Common Mode Rejection Ratio Supply Voltage Rejection Ratio Output Source Current Output Sink Current Channel Separation Operating Current Slew Rate Gain Bandwidth Product SYMBOL VIO IIO IB AV VOM VICM CMR SVR ISOURCE ISINK CS ICC SR GB TEST CONDITION RS=0 + IIN -IIN + IIN or IIN RL>2k RL=2k MIN. 3.5 0~3.5 20 8 TYP. 2 5 20 100 85 100 40 20 120 1 0.5 0.5 MAX. 10 50 500 2 UNIT mV nA nA V/mV V V dB dB mA mA dB mA V/s MHz VIN =1V,VIN =0V + VIN =0V,VIN =1V f=1k~20kHz,Input Referred RL= +V /V =15V +V /V =15V + - -2- Ver.2003-03-20 NJM2902 TYPICAL CHARACTERISTICS Ver.2003-03-20 -3- NJM2902 TYPICAL CHARACTERISTICS -4- Ver.2003-03-20 NJM2902 TYPICAL CHARACTERISTICS Ver.2003-03-20 -5- NJM2902 APPLICATION Improvement of Cross-over Distortion Equivalent circuit at the output stage NJM2902,in its static state ( No in and output condition ) when design, QU being biassed by constant current ( break down beam ) yet, QL stays OFF. While using with both power source mode, the cross-over distortion might occur instantly when QL ON. There might be cases when application for amplifier of audio signals, not only distortion but also the apparent frequency bandwidth being narrowed remarkably. It is adjustable especially when using both power source mode, constantly to use with higher current on QU than the load current ( including feedback current ),and then connect the pull-down resister RP at the part between output and GND pins. [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. -6- Ver.2003-03-20 |
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