NJM2783V-TE1

NJM2783 Monaural Microphone Amplifier with ALC GENERAL DESCRIPTION PACKAGE OUTLINE The NJM2783 is a monaural microphone amplifier with auto level control function to avoid distortion due to clipping. The voltage gain and the limit level are adjustable by external resistors. It is suitable for mini component audio system, home audio system, karaoke and others. NJM2783V FEATURES Operating Voltage +2.7 to +13.0V Monaural Microphone Amplifier Auto level control (ALC) function (Adjustable the limit level by external resistors 200mVrms to 2Vrms) Adjustable the voltage gain by external resistors +20 to +63dB (R =OPEN) SENSE Additional Gain Amplifier 0dB/+20dB switchable Built-in Buffer Amplifier Low Equivalent Input Noise 1 Vrms typ. Carefully designed to reject RF noise Bipolar Technology Package Outline SSOP14 BLOCK DIAGRAM IN GAIN SW INT SENSE VREF V+ GND Detector Bias Microphone Amprifier Additional Gain Buffer Amplifier 0dB/+20dB 100k 100k VCR GAIN1 GAIN2 DET OUT BUFFIN BUFFGAIN BUFFOUT Version 7.0E 1 NJM2783 PIN CONFIGURATION SSOP14 1 14 2 13 3 12 4 11 5 10 6 9 7 8 No. Symbol Function 1 GAIN1 Microphone Amp Gain Setting 1 2 GAIN2 Microphone Amp Gain Setting 2 3 DET Detector Input 4 OUT Microphone Amp Output 5 BUFFIN Buffer Input 6 BUFFGAIN Buffer Gain Setting 7 BUFFOUT Buffer Output 8 GND Ground 9 V+ Power Supply 10 VREF Reference Voltage 11 SENSE Limit Level Setting 12 INT Recovery Time Setting 13 GAIN SW Gain Setting 14 IN Microphone Input Version 7.0E 2