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2252 Basic
Application Circuit
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A critical function
in modern electronics is accurately sensing the level of
a signal. All our level detectors respond logarithmically
(that is, by producing an output scaled in decibels -- dBs) to the RMS value of the input signal. RMS response
produces natural-sounding response to transient
information, which is important in the design of dynamics
processors. Based on technology originally developed
at dbx, our level detectors are used by manufacturers of
compressors, limiters, gates etc. to determine the level
of audio signals.
The THAT 2252 integrated-circuit rms level
detector is designed to convert an AC input current into
a DC output voltage. The output is proportional to the
log of the true rms value of the input signal. The parts
are housed in a space-efficient plastic 8-pin
single-in-line (SIP) package, and require minimal support
circuitry.
Fabricated in a super low-noise process,
the 2252 combines wide dynamic range with frequency
response to beyond 20 kHz. The logarithmic output is
especially convenient for audio applications requiring
decibel-linear scaling. The integration time is
adjustable via an external R/C pair. With some external
circuitry, response to DC is also possible.
Because the 2252 scales
its output voltage logarithmically, it offers a
particularly good match to THAT Corporation Voltage
Controlled Amplifier (VCA) ICs such as THAT2180 and THAT2181 Series parts. We also offer an RMS level
detector combined with a VCA in our THAT4301 Analog Engine® Dynamics Processor.
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Features
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True RMS Response
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Wide Dynamic Range: > 80 dB
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High Crest Factor: 8 (1 dB error)
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Wide Bandwidth: > 20 kHz
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Logarithmic Output Scaling
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Low Cost
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Single In-Line package
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Matches THAT 2180 and 2181 Series VCAs
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Applications
- Meters
- Spectrum Analyzers
- Compressors
- Expanders
- Oscillators
- Psychoacoustic Modeling
- Noise Measurement
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 For complete specifications, download a
copy of the 2252 Datasheet.
Datasheets are
provided in Adobe's PDF format. You need to have Adobe
Acrobat Reader installed on your computer to view the file. To
obtain a free copy of Acrobat Reader follow the link at right.
 All
2252 parts are RoHS compliant.
Minimum Order Quantity is one tube full. Parts must be ordered
in
multiples of the MOQ.
Samples are available for qualified applicants.
Pricing is subject to change.
The THAT 2252 Demonstration
System allows an engineer to test the performance of a THAT 2252 IC quickly and easily. The
demo board is self-contained
circuit board with XLR connectors for signal input and output and a
3-pin header for connection to an external regulated DC power supply
(not included).
For samples
or further pricing information, please contact us
directly by telephone: +1(508)634-9922, fax:+1(508)634-6698, or email: sales@thatcorp.com.
Harsh Environment Packaging - TT Semiconductor repackages THAT Corporation’s IC products in ruggidized plastic for the medical, aerospace, defense, and heavy industrial marketplaces.
For more information please visit their web site: www.ttsemiconductor.com, contact them via phone: 714-257-2257 or email: BHarris@ttsemiconductor.com.
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