NJM2783 Просмотр технического описания (PDF) - Japan Radio Corporation

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NJM2783

Monaural Microphone Amplifier with ALC

Japan Radio Corporation  

NJM2783

Monaural Microphone Amplifier with ALC

"GENERAL DESCRIPTION

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.

"PACKAGE OUTLINE

" FEATURES

• Operating Voltage

• Monaural Microphone Amplifier

• Auto level control (ALC) function

(Adjustable the limit level

by external resistors

• Adjustable the voltage gain

by external resistors

• Additional Gain Amplifier

• Built-in Buffer Amplifier

• Low Equivalent Input Noise

• Carefully designed to reject RF noise

• Bipolar Technology

• Package Outline

+2.7 to +13.0V

200mVrms to 2Vrms)

+20 to +63dB (RSENSE=OPEN)

0dB/+20dB switchable

1µVrms typ.

SSOP14

NJM2783V

" BLOCK DIAGRAM

IN

GAIN SW

INT

SENSE VREF

V+

GND

Detector

Bias

Microphone Amprifier

100k

Additional Gain

0dB/+20dB

Buffer Amplifier

100k

VCR

GAIN1

GAIN2

DET

OUT

BUFFIN BUFFGAIN BUFFOUT

Version 7.0E

–1–

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