Part # AD737 datasheet

Part Manufacturer: Analog Devices

Analog Devices

Part Description: AD737 Low Cost Low Power True RMS-to-DC Converter Data Sheet (Rev. H)

Part Details:

Low Cost, Low Power, True RMS-to-DC Converter AD737 FEATURES FUNCTIONAL BLOCK DIAGRAM Computes 8k AD737 True rms value CC 1 8 COM Average rectified value FULL-WAVE Absolute value RECTIFIER VIN 2 7 +V 8k S Provides INPUT AMPLIFIER 200 mV full-scale input range (larger inputs with POWER input attenuator) BIAS 3 RMS CORE 6 OUTPUT DOWN SECTION Direct interfacing with 3½ digit CMOS ADCs High input impedance: 1012 ­VS 4 5 CAV Low input bias current: 25 pA maximum 0108- High accuracy: ±0.2 mV ± 0.3% of reading 8200 RMS conversion with signal crest factors up to 5 Figure 1. Wide power supply range: ±2.5 V to ±16.5 V Low power: 160 A maximum supply current No external trims needed for specified accuracy A general-purpose, buffered voltage output version also available (AD736) GENERAL DESCRIPTION The AD7371 is a low power, precision, monolithic, true rms-to-dc Two signal input terminals are provided in the AD737. A high converter. It is laser trimmed to provide a maximum error of impedance (1012 ) FET input interfaces directly with high R ±0.2 mV ± 0.3% of reading with sine wave inputs. Furthermore, it input attenuators, and a low impedance (8 k) input accepts maintains high accuracy while measuring a wide range of input rms voltages to 0.9 V while operating from the minimum power

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AD737.pdf Datasheet