SSM2122 Datasheet PDF - Analog Devices

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SSM2122
Analog Devices

Part Number SSM2122
Description (SSM2120 / SSM2122) Dynamic Range Processors/Dual VCA
Page 12 Pages


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FEATURES
0.01% THD at +10 dBV In/Out
100 dB VCA Dynamic Range
Low VCA Control Feedthrough
100 dB Level Detection Range
Log/Antilog Control Paths
Low External Component Count
APPLICATIONS
Compressors
Expanders
Limiters
AGC Circuits
Voltage-Controlled Filters
Noise Reduction Systems
Stereo Noise Gates
Dynamic Range
Processors/Dual VCA
SSM2120/SSM2122
FUNCTIONAL BLOCK DIAGRAM
V+
CURRENT
MIRRORS
SIGNAL
OUT
36k
–VC
+VC
V+
V+
SIGNAL
INPUT 36k
V+
IREF
GENERAL DESCRIPTION
The SSM2120 is a monolithic integrated circuit designed for the
purpose of processing dynamic signals in various analog systems
including audio. This “dynamic range processor” consists of two
VCAs and two level detectors (the SSM2122 consists of two
VCAs only). These circuit blocks allow the user to logarithmically
control the gain or attenuation of the signals presented to the
level detectors depending on their magnitudes. This allows the
compression, expansion or limiting of ac signals, some of the
primary applications for the SSM2120.
V–
PIN CONNECTIONS
22-Pin Plastic DIP
(P Suffix)
16-Pin Plastic DIP
(P Suffix)
THRESH 1 1
22 GND
LOG AV 1 2
21 V+
CONOUT 1 3
20 SIGOUT 2
SIGOUT 1 4
19 +VC2
+VC1 5 SSM2120 18 CFT 2
CFT 1 6 TOP VIEW 17 –VC2
–VC1 7 (Not to Scale) 16 SIGIN 2
SIGIN 1 8
15 RECIN 2
RECIN 1 9
14 CONOUT 2
IREF 10
13 LOG AV 2
V– 11
12 THRESH 2
GND 1
16 GND
SIGOUT 1 2
15 V+
+VC1 3
14 SIGOUT 2
CFT 1 4 SSM2122 13 +VC2
TOP VIEW
–VC1 5 (Not to Scale) 12 CFT 2
SIGIN 1 6
11 –VC2
IREF 7
10 SIGIN 2
V– 8
9 GND
REV. C
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
© Analog Devices, Inc., 1995
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
Free Datasheet http://www.datasheet4u.com/

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