SSM2160

Manufacturer Part NumberSSM2160
Description6-Channel, Clickless Serial Input Balance/Master Volume Control
ManufacturerAnalog Devices
SSM2160 datasheet
 
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FEATURES
Clickless Digitally Controlled Level Adjustment
SSM2160: 6 Channels
7-Bit Master Control Gives 128 Levels of Attenuation
5-Bit Channel Controls Give 32 Levels of Gain
Master/Channel Step Size Set by External Resistors
100 dB Dynamic Range
Automatic Power-On Mute
Excellent Audio Characteristics:
0.01% THD+N
0.001% IMD (SMPTE)
–90 dBu Noise Floor
–80 dB Channel Separation
90 dB SNR
Single-and Dual-Supply Operation
APPLICATIONS
Home Theater Receivers
Surround Sound Decoders
®
®
Circle Surround
and AC-3
Decoders
DSP Soundfield™ Processors
HDTV and Surround TV Audio Systems
Automotive Surround Sound Systems
Multiple Input Mixer Consoles and Amplifiers
GENERAL DESCRIPTION
The SSM2160 allows digital control of volume of six audio
channels, with a master level control and individual channel
controls. Low distortion VCAs (voltage controlled amplifiers) are
used in the signal path. By using controlled rate-of-change drive
to the VCAs, the “clicking” associated with switched resistive
networks is eliminated in the master control. Each channel is
controlled by a dedicated 5-bit DAC providing 32 levels of gain.
A master 7-bit DAC feeds every control port giving 128 levels of
attenuation. Step sizes are nominally 1 dB and can be changed by
external resistors. Channel balance is maintained over the entire
master control range. Upon power-up, all outputs are automati-
cally muted. A 3-wire or 4-wire serial data bus enables interfacing
with most popular microcontrollers. Windows
evaluation board for controlling the SSM2160 are available.
The SSM2160 can be operated from single supplies of +10 V to
+20 V or dual supplies from ± 5 V to ±10 V. An on-chip reference
provides the correct analog common voltage for single-supply
applications. The SSM2160 comes in a SOIC package; see the
Ordering Guide for details.
REV. A
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective companies.
Master/Balance Volume Controls
FUNCTIONAL BLOCK DIAGRAM
V+
SUPPLY AND
V–
REFERENCE
GENERATOR
V
REF
®
software and an
CLK
SHIFT REGISTER
DATA
ADDRESS
LD
DECODER
WRITE
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
6-Channel, Serial Input
SSM2160
POWER
VCA
5-BIT
CHANNEL
DAC
VCA
5-BIT
CHANNEL
DAC
VCA
5-BIT
CHANNEL
DAC
VCA
5-BIT
CHANNEL
DAC
VCA
5-BIT
CHANNEL
DAC
VCA
5-BIT
CHANNEL
DAC
STEP SIZE
7-BIT
ADJUST
MASTER
DAC
AND
SSM2160
www.analog.com
© 2003 Analog Devices, Inc. All rights reserved.
CH1 IN
CH1 OUT
CH2 IN
CH2 OUT
CH3 IN
CH3 OUT
CH4 IN
CH4 OUT
CH5 IN
CH5 OUT
CH6 IN
CH6 OUT
CH SET
MSTR SET
MSTR OUT

SSM2160 Summary of contents