SSM2160S Analog Devices Inc, SSM2160S Datasheet

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SSM2160S

Manufacturer Part Number
SSM2160S
Description
IC BALANCE/VOL CTRL DGITL 24SOIC
Manufacturer
Analog Devices Inc
Type
Stereo Audio Volume Controlr
Datasheet

Specifications of SSM2160S

Rohs Status
RoHS non-compliant
Applications
Decoders, Receivers, Surround Systems
Mounting Type
Surface Mount
Package / Case
24-SOIC (7.5mm Width)

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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.
FEATURES
Clickless Digitally Controlled Level Adjustment
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:
Single-and Dual-Supply Operation
APPLICATIONS
Home Theater Receivers
Surround Sound Decoders
Circle Surround
DSP Soundfield™ Processors
HDTV and Surround TV Audio Systems
Automotive Surround Sound Systems
Multiple Input Mixer Consoles and Amplifiers
SSM2160: 6 Channels
0.01% THD+N
0.001% IMD (SMPTE)
–90 dBu Noise Floor
–80 dB Channel Separation
90 dB SNR
®
and AC-3
®
Decoders
®
software and an
Master/Balance Volume Controls
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
WRITE
DATA
V
CLK
REF
LD
V+
V–
SHIFT REGISTER
SUPPLY AND
GENERATOR
ADDRESS
DECODER
REFERENCE
FUNCTIONAL BLOCK DIAGRAM
CHANNEL
CHANNEL
CHANNEL
CHANNEL
CHANNEL
CHANNEL
MASTER
POWER
AND
7-BIT
DAC
5-BIT
5-BIT
5-BIT
5-BIT
5-BIT
5-BIT
DAC
DAC
DAC
DAC
DAC
DAC
6-Channel, Serial Input
© 2003 Analog Devices, Inc. All rights reserved.
SSM2160
VCA
VCA
VCA
VCA
VCA
VCA
SSM2160
STEP SIZE
ADJUST
www.analog.com
CH SET
MSTR SET
MSTR OUT
CH1 IN
CH2 IN
CH3 IN
CH4 IN
CH5 IN
CH6 IN
CH1 OUT
CH2 OUT
CH3 OUT
CH4 OUT
CH5 OUT
CH6 OUT

Related parts for SSM2160S

SSM2160S Summary of contents

Page 1

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 ...

Page 2

SSM2160–SPECIFICATIONS Parameter AUDIO PERFORMANCE Noise Floor Total Harmonic Distortion + Noise THD+N Channel Separation Dynamic Range ANALOG INPUT Maximum Level Impedance ANALOG OUTPUT 3 Maximum Level Impedance Offset Voltage Minimum Resistive Load Maximum Capacitive Load MASTER ATTENUATOR ERROR A = ...

Page 3

TIMING CHARACTERISTICS Timing Symbol Description t Input Clock Pulsewidth, Low CL t Input Clock Pulsewidth, High CH t Data Setup Time DS t Data Hold Time DH t Positive CLK Edge to End of Write CW t Write to Clock ...

Page 4

... JA board for SOIC packages. Model SSM2160S SSM2160S-REEL EVAL-SSM2160EB CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the SSM2160 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges ...

Page 5

Pin No. Mnemonic Function 1 V+ Positive Power Supply. Refer to the Application Information section for details on the power supply. 2 AGND Internal Ground Reference for the Audio Circuitry. When operating the SSM2160 from dual supplies, AGND should be ...

Page 6

SSM2160–Typical Performance Characteristics 0dBu IN 1 10k 50pF L 0.1 0.01 0.001 –70 –60 –40 – GAIN – dB TPC ...

Page 7

12V – 0dBu @ 1kHz – 100k L –40 MASTER = 20dB –50 CHANNEL = 0dB –60 –70 –80 –90 –100 –110 –120 –130 –140 ...

Page 8

SSM2160 APPLICATIONS INFORMATION General The SSM2160 is a 6-channel volume control intended for multichannel audio applications. While dual-channel controls sufficed for stereo applications, rapidly emerging home theater surround sound and auto sound venues demand both 4-channel and 6-channel high performance ...

Page 9

SSM2160 CHn IN AGND REF OUT V REF 0 V– 13 DGND Figure 4. Single-Supply Operation with V Signal Chain Considerations The SSM2160 is capable ...

Page 10

SSM2160 Serial Data Input Format The standard format for data sent to SSM2160 is an address byte followed by a data byte. This is depicted in the truth table, Figure 7. Two 8-bit bytes are required for each master and ...

Page 11

The master and channel step sizes default the absence of external components. The step sizes can be changed by the addition of external resistors if finer resolution is desired. ...

Page 12

SSM2160 DC Blocking and Frequency Response All internal signal handling uses direct coupled circuitry. Although the input and output dc offsets are small, dc blocking is required when the signal ground references are different. This will be the case if ...

Page 13

Controlling Stereo Headphones Level and Balance Figure 14 shows how the SSM2160 can be configured to drive a stereo headphone output amplifier. Note that the minimum load specification precludes driving headphones directly. This example assumes that audio left and right ...

Page 14

SSM2160 that is assigned to the connector used on your PC if different from the default LPT1. Windows Control Panel The control panel contains all the functions required to control the SSM2160, and each feature is described below. A mouse ...

Page 15

COPLANARITY 0.10 Revision History Location 2/03—Data Sheet changed from REV REV. A. Removed SSM2161 model . . . . . . . . . . . . . . . . . . . ...

Page 16

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