True RMS-to-DC Converters

The MX536A and MX636 are true RMS-to-DC converters. They feature low power and are designed to accept low-level input signals from 0 to 7VRMS for the MX536A and 0 to 200mVRMS for the MX636. Both devices accept complex input waveforms containing AC and DC components. They can be operated from either a single supply or dual supplies. Both devices draw less than 1mA of quiescent supply current, making them ideal for battery-powered applications.

Input and output offset, positive and negative waveform symmetry (DC reversal), and full-scale accuracy are laser trimmed, so that no external trims are required to achieve full rated accuracy.

Applications

* Battery-Powered Applications * Digital Multimeters * Panel Meters * Process Control

* True RMS-to-DC Conversion

* Computes RMS of AC and DC Signals

* Wide Response:

* 2MHz Bandwidth for VRMS > 1V (MX536A)

* 1MHz Bandwidth for VRMS > 100mV (MX636)

* Auxiliary dB Output:

* 60dB Range (MX536A)

* 50dB Range (MX636)

* Single- or Dual-Supply Operation

* Low Power:

* 1.2mA typ (MX536A)

* 800µA typ (MX636)