NJM2781

NJM2781 Monaural Microphone Amplifier I GENERAL DESCRIPTION NJM2781 is a monaural microphone amplifier IC with a standby function, and can vary a voltage gain by adjusting an external resistor. Since the NJM2781 operates with a low voltage range of +2.7V to +4.5V and is available in tiny packages of TVSP8 and SSOP8, it is ideally suited for portable and handheld components. I PACKAGE OUTLINE NJM2781RB1 NJM2781V I FEATURES G Operating Voltage G Operating Current G Bipolar Technology G Package Outline I BLOCK DIAGRAM +2.7V to +4.5 V 1.8mA typ. 1µA max. (in Standby mode) TVSP8, SSOP8 NOISE 1 REG GND 8 7 6 5 2 STBY Reg V+ 3 4 OUT IN+ IN- I PIN FUNCTION No. 1 8 1 2 4 5 3 4 SYMBOL NOISE REG STBY IN+ FUNCTION Noise Bypass Regulator Output Standby On/Off Non-Inverted Input No. 5 6 7 8 SYMBOL INOUT V+ GND FUNCTION Inverted Input Output Power Supply Ground –1– NJM2781 I ABSOLUTE MAXIMUM RATING (Ta=25°C) PARAMETER SYMBOL Supply Voltage Power Dissipation Operating Temperature Range Storage Temperature Range V + RATING 5 TVSP8:320, SSOP8:250 -40 to 85 -40 to 125 UNIT V mW °C °C PD Topr Tstg I ELECTRICAL CHARACTERISTICS + (Ta=25°C,V =2.8V,Vin=-40dBV, f=1kHz,RL=9kΩ) GPower Supply PARAMETER Operating Voltage Operating Current 1 Operating Current 2 Mic Power Supply Voltage GAmplifier PARAMETER Output Voltage Voltage Gain Maximum Output Voltage Total Harmonic Distortion (THD+N) Output Noise Power Supply Ripple Rejection GControl PARAMETER High Level Input Voltage Low Lev...