Providing high design flexibility of equipments with ALC and gain control function

October 1, 2009

New Japan Radio releases the NJM2783, monaural microphe amplifier
with Auto Level Control function

October 1, 2009 - New Japan Radio Co., Ltd. has introduced to the market, the NJM2783, monaural microphe amplifier with Auto Level Control (ALC) function, suitable for audio-equipments with microphone input such as Mini-component set, Home audio set and Karaoke set.

[Background of development]

Conventionally microphone amplifier does not have variable gain function and needs external ALC circuit. So there is not a flexibility of equipment design.
To solve the problem, New Japan Radio has developed the NJM2783, monaural microphe amplifier with ALC function.

[Features]

The NJM2783 is a monaural microphe amplifier consists of microphe amplifier and ALC circuit (detector and VCR*1 circuit).

1.Realizing low distortion amplification with ALC function and raising design flexibility with gain control function
The NJM2783 can realize low distortion amplification by high input signal reduction, with built-in ALC function. Moreover, it can control limit level and microphone amplifier gain freely. Therefore, it provides flexible gain setting meets the demands of equipments.
2.Providing high sound quality with low input noise voltage and high gain
Microphone amplifier is required signal amplification with high S/N ratio*2, because it amplifies ultra small signal.The NJM2783 realizes high S/N ratio*2 100dB and above, with excellent electrical characteristics such as low input noise voltage and high gain. Therefore it provides high sound quality.
3.Covering wide range of applications with wide operating voltage range (2.7V to 13V)
The NJM2783 can be employed on wide range of audio equipment with microphone input due to its wide operating voltage range (conventionally type NJM2781: 2.7V to 4.5V).
Notes
*1 :VCR:Voltage Controlled Resistance
*2 :S/N Ratio:signal/noise ratio, unit dB(decibel)

Product Name NJM2783
Function Monaural Microphe Amplifier with Auto Level Control function
Applications Mini-component set / Home audio set / Karaoke set
Packaging SSOP14(5.0×4.4×1.25mm typ.)
NJM2783V

[Features & Characteristics]

[Block Diagram]

NJM2783 block diagram

[Schedule]

A detailed spec is here
NJM2783

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