NJM2122 ULTRA LOW NOISE DUAL OPERATIONAL AMPLIFIER GENERAL DESCRIPTION PACKAGE OUTLINE The NJM2122 is an ultra low noise dual operational amplifier. The features of ultra low noise, low operating voltage, and low saturation voltage are suitable for microphone amplifier of digital audio items such as portable MD,DAT,and others. FEATURES Operating Voltage ( 2.0V~7.0V ) NJM2122D NJM2122M Ultra Low Noise Voltage ( 1.5nV/Hz typ. f=1kHz ) Low Saturation Output Voltage ( 0.3V typ. ) Bipolar Technology Package Outline DIP8,DMP8 PIN CONFIGURATION PIN FUNCTION 1.A OUTPUT 2.A INPUT 3.A +INPUT - 4.V 5.B +INPUT 6.B INPUT 7.B OUTPUT + 8.V NJM2122D NJM2122M EQUIVALENT CIRCUIT ( 1/2 Shown ) Ver.2007-05-21 -1- NJM2122 ABSOLUTE MAXIMUM RATINGS ( Ta=25C ) PARAMETER SYMBOL RATINGS UNIT + - Supply Voltage V /V 10 V Differential Input Voltage V 0.5 V ID Input Voltage V 10 ( note ) V IC ( DIP8 ) 500 Power Dissipation P mW D ( DMP8 ) 300 Operating Temperature Range T -20~+75 C opr Storage Temperature Range T -40~+125 C stg ( note ) When the supply voltage is less than 10V,the absolute maximum input voltage is equal to the supply voltage. ELECTRICAL CHARACTERISTICS + ( V =5V,Ta=25C ) PARAMETER SYMBOLTEST CONDITION MIN. TYP. MAX. UNIT Operating Voltage 1 Vope1 DIP Package 2.0 - 10.0 V Operating Voltage 2 Vope2 DMP Package 2.0 - 7.0 V Operating Current I V =0V,R = - 7.0 9.5 mA CC IN L Input Offset Voltage V R =500 - 1.0 6.0 mV IO S Input Offset Current I - 0.45 1.50 A IO Input Bias Current I - 3.6 8.0 A B Large Signal Voltage Gain A R 10k 80 100 - dB V L Input Common Mode Voltage Range V 0.7 1.0 - V ICM Common Mode Rejection Ratio CMR 60 74 - dB Supply Voltage Rejection Ratio SVR 60 80 - dB Maximum Output Voltage V R 2.5k 2.0 2.2 - V OM L Slew Rate SR G =20dB,V = 0.1V - 2.4 - V/s V IN Gain Bandwidth Product GB - 12 - MHz Equivalent Input Noise Voltage 1 e R =10,f=1kHz - 1.5 - nVHz n1 S *Figure1 Equivalent Input Noise Voltage 2 e - 0.56 0.75 Vrms n2 Channel Separation CS f=1kHz - 90 - dB Total Harmonic Distortion THD V =1Vrms,f=1kHz - 0.003 - % O G =20dB,R =2.5k V L ( note ) Between 30 to 50dB voltage gain is recommended. In case of voltage gain less than 30dB,phase compensation by external circuit is required. The voltage follower circuit must not be used. DMP package should be used in operating voltage less than 7V,because of the P limitation. D Figure1 Ver.2007-05-21 - 2 -