SM6451BV Datasheet, PDF (1/12 Pages) Nippon Precision Circuits Inc – Audio Variable Volume IC

NIPPON PRECISION CIRCUITS INC.
SM6451BV
Audio Variable Volume IC
OVERVIEW
The SM6451BV is a 3-wire serial-controlled electronic variable volume IC for audio applications. It provides
electronic volume control for a stereo system (left and right channels), and independent channel attenuation
and muting, with greatly enhanced digital zip noise suppression. The chip address function allows up to four
SM6451BV devices to be connected and individually controlled over the 3-wire control interface from a single
CPU. It is available in 16-pin VSOP packages.
FEATURES
s Stereo inputs and outputs
s Attenuation function
• 2-channel independent control
• 1.0 dB/step over 80 steps
• 0 to −80 dB range
s Mute function
s 3-wire serial data control (MDT, MCK, MLEN)
s Chip addressing (up to 4 devices can be connected
in parallel)
s Low noise
• 0.003 % THD + noise
• 12 µVrms residual noise
s 2.5 to 3.6 V single power supply
s Silicon-gate CMOS process
PINOUT
(Top View)
RSTN 1
ADRS1
ADRS2
DVDD
LOUT
LIN
AVDD
VRL 8
16 MDT
MCK
MLEN
DVSS
ROUT
RIN
AVSS
9 VRR
APPLICATIONS
s Audio equipment
ORDERING INFORMATION
PACKAGE DIMENSIONS
(Unit: mm)
16 pin VSOP
Device
SM6451BV
Package
16-pin VSOP
0.275TYP
5.1 0.2
0.65
0.10
+ 0.10
0.22 - 0.05 _{0.12 M}
0.15^+-00..105
0 10
0.5 0.2
NIPPON PRECISION CIRCUITS—1