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AD737

Analog Devices
Part Number AD737
Manufacturer Analog Devices
Description True RMS-to-DC Converter
Published Mar 23, 2005
Detailed Description Data Sheet FEATURES Computes True rms value Average rectified value Absolute value Provides 200 mV full-scale input rang...
Datasheet PDF File AD737 PDF File

AD737
AD737


Overview
Data Sheet FEATURES Computes True rms value Average rectified value Absolute value Provides 200 mV full-scale input range (larger inputs with input scaling) Direct interfacing with 3½ digit CMOS analog-to-digital converters (ADCs) High input impedance: 1012 Ω Low input bias current: 25 pA maximum High accuracy: ±0.
2 mV ± 0.
3% of reading RMS conversion with signal crest factors up to 5 Wide power supply range: ±2.
5 V to ±16.
5 V Low power: 25 μA (typical) standby current No external trims needed for specified accuracy The AD737 output is negative going; the AD736 is a positive output-going version of the same basic device GENERAL DESCRIPTION The AD737 is a low power, precision, monolithic, true rms-to-dc converter.
It is laser trimmed to provide a maximum error of ±0.
2 mV ± 0.
3% of reading with sine wave inputs.
Furthermore, it maintains high accuracy while measuring a wide range of input waveforms, including variable duty cycle pulses and triac (phase) controlled sine waves.
The low cos...



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