SSM2122资料

Unity Gain or Less At 1 kHz +VC = –VC = 0 V +10 dBV IN/OUT RE: 0 dBV
kHz
5.0
nA mA mV
ABSOLUTE MAXIMUM RATINGS
ORDERING GUIDE
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 18 V Operating Temperature Range . . . . . . . . . . . . –10°C to +55°C Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . +150°C Storage Temperature . . . . . . . . . . . . . . . . . . –65°C to +150°C Maximum Current into Any Pin . . . . . . . . . . . . . . . . . . 10 mA Lead Temperature Range (Soldering, 60 sec) . . . . . . . +300°C Package Type 16-Pin Plastic DIP (P) 22-Pin Plastic DIP (P) θJA1 86 70 θJC 10 7 Units °C/W °C/W
–VC1 +VC2
CFT 1
LOG AV 1
V–
V+ |I IN | INPUT 2 OUTPUT 2 RECIN 2 FULL WAVE RECTIFIER 2V –VC2 CFT 2
THRESH 2
CONOUT 2
LOG AV 2
V–
Figure 1. SSM2120 Block Diagram
PIN CONNECTIONS 22-Pin Plastic DIP (P Suffix) 16-Pin Plastic DIP (P Suffix)
THRESH 1 1 LOG AV 1 2 CONOUT 1 3 SIGOUT 1 4 +VC1 5 CFT 1 6
22 GND 21 V+ 20 SIGOUT 2 19 +VC2
Specifications are subject to change without notice.
S A
REF
= 200 ␮A, +VC = –VC = GND (AV = 0 dB). 0 dB = 1 V rms
SSM2120/SSM2122 Typ Max ± 18 10 –8 ± 350 ±8 +40 6 –3300 250 100 –0.5 0.005 –80 90 0.085 95 2800 4 3 ± 0.5 1000 50 7.5 ± 85 7.5 ± 0.5 ± 175 ± 4.2 ± 3.4 +0.5 0.04
பைடு நூலகம்
NOTE 1 θJA is specified for worst case mounting conditions, i.e., θJA is specified for device in socket for P-DIP.
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 SSM2120/SSM2122 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality.
元器件交易网
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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
WARNING!
ESD SENSITIVE DEVICE
–2–
REV. C
元器件交易网
SSM2120/SSM2122
+VC1
SSM2122
|I IN | FULL WAVE RECTIFIER 2V
V+ RECIN 1
THRESH 1
CONOUT 1
INPUT 1
OUTPUT 1
SIGIN 1 6 IREF 7 V– 8
SIGIN 1 8 RECIN 1 9 IREF 10 V– 11
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
Model SSM2120 SSM2122
Temperature Range –10°C to +50°C –10°C to +50°C
Package Description 22-Pin Plastic DIP 16-Pin Plastic DIP
Package Option (N-22) (N-16)
GND 1 SIGOUT 1 2 +VC1 3 CFT 1 4
16 GND 15 V+ 14 SIGOUT 2
SSM2120
18 CFT 2
13 +VC2 TOP VIEW –VC1 5 (Not to Scale) 12 CFT 2 11 –VC2 10 SIGIN 2 9 GND
SSM2122
TOP VIEW 17 –VC2 –VC1 7 (Not to Scale) 16 SIGIN 2 15 RECIN 2 14 CONOUT 2 13 LOG AV 2 12 THRESH 2
元器件交易网
SSM2120/SSM2122–SPECIFICATIONS (@V = ؎15 V, T = +25؇C, I
ELECTRICAL CHARACTERISTICS unless otherwise noted)
Parameter POWER SUPPLY Supply Voltage Range Positive Supply Current Negative Supply Current VCAs Max ISIGNAL (In/Out) Output Offset Control Feedthrough (Trimmed) Gain Control Range Control Sensitivity Gain Scale Factor Drift Frequency Response Off Isolation Current Gain THD (Unity-Gain) Noise (20 kHz Bandwidth) LEVEL DETECTORS (SSM2120 ONLY) Detection Range Input Current Range Rectifier Input Bias Current Output Sensitivity (At LOG AV Pin) Output Offset Voltage Frequency Response IIN = 1 mA p-p IIN = 10 µA p-p IIN = 1 µA p-p CONTROL AMPLIFIERS (SSM2120 ONLY) Input Bias Current Output Drive (Max Sink Current) Input Offset Voltage
Dynamic Range Processors/Dual VCA SSM2120/SSM2122
FUNCTIONAL BLOCK DIAGRAM
V+ 36kΩ SIGNAL OUT
CURRENT MIRRORS
–VC +VC V+ V+ SIGNAL INPUT V+ 36kΩ
IREF
GENERAL DESCRIPTION
VOLTAGE-CONTROLLED AMPLIFIERS VCA PERFORMANCE
The two voltage-controlled amplifiers are full Class A current in/current out devices with complementary dB/V gain control ports. The control sensitivities are +6 mV/dB and –6 mV/dB. A resistor divider (attenuator) is used to adapt the sensitivity of an external control voltage to the range of the control port. It is best to use 200 Ω or less for the attenuator resistor to ground.
V–
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.
Conditions
Min ±5
Units V mA mA µA µA µV dB mV/dB ppm/°C kHz dB dB % dB dB µA p-p nA mV/dB mV
8 –6 ± 300 RIN = ROUT = 36 kΩ, –30 dB ≤ AV ≤ 0 dB Unity-Gain –85 ± 325 ±1 ± 750