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AD637 - Wide-Band RMS-to-DC Converter

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General Description

The AD637 is a complete, high accuracy, rms-to-dc converter that computes the true rms value of any complex waveform.

It offers performance that is unprecedented in integrated circuit rms-to-dc converters and comparable to discrete and modular techniques in accuracy, bandwidth, and dynamic range.

The AD637 computes the true root mean square, mean square, or absolute value of any complex ac (or ac plus dc) input waveform and gives an equivalent dc output voltage.

Overview

Data Sheet.

Key Features

  • High accuracy 0.02% maximum nonlinearity, 0 V to 2 V rms input 0.1% additional error to crest factor of 3 Wide bandwidth 8 MHz at 2 V rms input 600 kHz at 100 mV rms Computes True rms Square Mean square Absolute value dB output (60 dB range) Chip select/power-down feature allows Analog three-state operation Quiescent current reduction from 2.2 mA to 350 µA.

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