MOSA

MS6257

Gain and Attenuation Volume Controller IC

REV 6

1

www.mosanalog.com

Gain and Attenuation Volume Controller IC

One Set of Stereo Input, Low voltage

Gain and Attenuation 15~-79dB

FEATURES

•Operation range: 2.7V~6.5V

•Low power consumption

•Gain / Attenuation: 15 to –79dB

•+1dB/step, -1dB/step and -10dB/step are controlled

independently

•I

•Housed in 8 pin SOP package

APPLICATIONS

•Multimedia system

•Hi-Fi audio system

•MP3, PDA

DESCRIPTION

The MS6257 is the stereo audio volume controller IC. It uses CMOS technology specially for the low voltage

application with low noise, rail-to-rail output. The MS6257 provide an I

range of 15dB to –79dB. The gain and attenuation, +1dB/step, -1dB/step and -10dB/step are controlled independently.

The initial condition is set to be maximum attenuation –79dB (-70dB + -9dB), gain 0dB and mute on mode when the

power is up.

BLOCK DIAGRAM

R-IN

REF

SDA

SCL

R-OUT

L-OUT

-10dB/Step

-1dB/Step

1dB/Step

Serial Bus Decoder and Latches

Reference

Circuit

1dB/Step

-1dB/Step

-10dB/Step

Mute

Control

Attenuation 0~-79dB

Gain 0~15dB

Gain 0~15dB

Attenuation 0~-79dB

L-IN