SSM2160S-REEL Analog Devices Inc, SSM2160S-REEL Datasheet

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SSM2160S-REEL

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

Specifications of SSM2160S-REEL

Rohs Status
RoHS non-compliant
Applications
Decoders, Receivers, Surround Systems
Mounting Type
Surface Mount
Package / Case
24-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Not Compliant

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a
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
FEATURES
Digitally-Controlled “Clickless” Level Adjustment
Master Control has 128 1 dB Steps
Each Channel has 32 1 dB Steps
Step Sizes Can Be Changed Using External Resistors
High Gain Accuracy
100 dB Gain Range
Power On Mute
Excellent Audio Characteristics:
Single or Dual Supply Operation
APPLICATIONS
Dolby* Pro-Logic Master Volume/Balance Control
Home THX† Systems
DSP Soundfield Processors
Automotive Audio Systems
HDTV Audio Systems
–100 dBu SNR (0 dBu = 0.775 V rms, V
+10 dBu Headroom (V
0.008% THD+N (@ 1 kHz, V
–80 dB Crosstalk (@ 1 kHz)
SSM2160: Six Channels
SSM2161: Four Channels
WRITE
ACOM
DATA
CLK
LD
V+
V–
SHIFT REGISTER
SUPPLY AND
S
REFERENCE
DECODER
ADDRESS
=
POWER
AND
IN
5 V)
= –10 dBu, Unity Gain)
S
FUNCTIONAL BLOCK DIAGRAM
=
6 and 4 Channel, “Clickless” Serial Input
5 V)
MASTER
CHANNEL
7-BIT
DAC
5-BIT
DAC
TO ADDITIONAL CHANNELS
SSM-2160: SIX CHANNEL
SSM-2161: FOUR CHANNEL
Balance/Master Volume Controls
GENERAL DESCRIPTION
The SSM2160 and SSM2161 allow digital control of volume for
six and four channels, respectively, with a master level control.
“Clicking” normally encountered with resistor-ladder attenua-
tors is eliminated by using high performance Voltage Controlled
Amplifiers (VCAs) in the signal path. The VCA control ports
are driven by DACs with controlled output rate-of-change to in-
sure noiseless volume changes. Each channel is controlled by a
dedicated 5-bit DAC, providing 32 steps of adjustment. In addi-
tion, a master 7-bit DAC feeds every control port, with 128
steps. Therefore, a balance can be achieved among all channels
over a 32 step range, and the master control allows adjustment
over its entire range while maintaining the desired channel-to-
channel balance. Master and channel step sizes are nominally
1 dB; master step sizes can be reduced by an external resistor.
Approximately 80 dB of attenuation and up to 20 dB of gain is
possible. Upon power-up, the output is automatically muted.
The SSM2160/SSM2161 can operate from single supplies of
8 V to 14 V and dual supplies from 4 V to 7 V. An on-chip
buffered supply splitter provides an analog common for single-
supply applications.
*Dolby is a registered trademark of Dolby Laboratories Licensing
*Corporation.
†Home THX is a registered trademark of Lucasfilm, Ltd.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
SSM2160/SSM2161
VCA
V
V
AUDIO
IN
OUT
Fax: 617/326-8703

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SSM2160S-REEL Summary of contents

Page 1

FEATURES Digitally-Controlled “Clickless” Level Adjustment SSM2160: Six Channels SSM2161: Four Channels Master Control has 128 1 dB Steps Each Channel has Steps Step Sizes Can Be Changed Using External Resistors High Gain Accuracy 100 dB Gain ...

Page 2

SSM2160/SSM2161–SPECIFICATIONS ELECTRICAL SPECIFICATIONS Parameter AUDIO PERFORMANCE Noise Headroom Total Harmonic Distortion Plus Noise Channel Separation ANALOG INPUT Input Offset Voltage Input Impedance GAIN CONTROL ELEMENTS Default Step Size – Master Default Step Size – Channel Gain Error Gain Match Error ...

Page 3

... P-DIP and device soldered in circuit board for SOIC package. ORDERING GUIDE Model Temperature Range Package Option SSM2160P – +85 C SSM2160S – +85 C SSM2160S-REEL – +85 C SSM2161P – +85 C SSM2161S – +85 C SSM2161S-REEL – +85 C 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 ...

Page 4

SSM2160/SSM2161 1 0.1 0.010 0.001 0.0005 0 0.1 Figure 1. THD vs. Amplitude (Gain = 0 dB, V SELECTION 7-BIT MASTER DAC 5-BIT CHANNEL DAC 1 5-BIT CHANNEL DAC 2 5-BIT CHANNEL DAC 3 5-BIT CHANNEL DAC 4 5-BIT CHANNEL ...

Page 5

CLK 1 1 DATA WRITE CLK DATA 0 1 WRITE NOTES 1. An idle HI (CLK-H) or idle LO (CLK-LO) clock ...

Page 6

SSM2160/SSM2161 DGND CLK SHIFT REGISTER AND DATA ADDRESS DECODER LD WRITE V+ VOLTAGE REFERENCE V– GENERATOR AGND ACOM Figure 5. SSM2160 Functional Diagram (SSM2161 Same but with Channels 5 and 6 Omitted) MASTER DAC CHANNEL DAC 1 VCA 1 CHANNEL ...

Page 7

V+ V+ 10µF + 0.1µF 2 AGND ACOM (NC) 12 V– 10µF + 0.1µF 13 DGND a. Dual Supply REV 10µF + 0.1µF 2 AGND 3 ACOM 10µF + ...

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