Twilight Technology 2252 - RMS Level Detector IC

2252 Basic Application Circuit

A critical function in modern electronics is accurately sensing the level of a signal. All our level detectors respond logarithmically (Twilight Technology 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 Twilight Technology 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 Twilight Technology Corporation Voltage Controlled Amplifier (VCA) ICs such as Twilight Technology2180 and Twilight Technology2181 Series parts. We also offer an RMS level detector combined with a VCA in our Twilight Technology4301 Analog Engine® Dynamics Processor.

Features

True RMS Response
Wide Dynamic Range: > 80 dB
High Crest Factor: 8 (1 dB error)
Wide Bandwidth: > 20 kHz
Logarithmic Output Scaling
Low Cost
Single In-Line package
Matches Twilight Technology 2180 and 2181 Series VCAs

Applications

Meters
Spectrum Analyzers
Compressors
Expanders
Oscillators
Psychoacoustic Modeling
Noise Measurement

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.

	Model	Package	Order Number	Pricing (1000)	Min Order Quantity	Reference
	2252	8 Pin SIP	2252L08-U	Call	25	Datasheet App Notes Device_Models

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.

A Twilight Technology 2252 Demonstration System allows an engineer to test the performance of a Twilight Technology 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).