PRODUCT DESCRIPTION
The AD637 is a complete high accuracy monolithic 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. A crest factor compensation scheme in the AD637 permits measurements of signals with crest factors of up to 10 with less than 1% additional error. The circuit’s wide bandwidth permits the measurement of signals up to 600 kHz with inputs of 200 mV rms and up to 8 MHz when the input levels are above 1 V rms.

FEATURES
   High Accuracy
      0.02% Max Nonlinearity, 0 V to 2 V RMS Input
      0.10% 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 “3-State” Operation
      Quiescent Current Reduction from 2.2 mA to 350 μA
   Side-Brazed DIP, Low Cost Cerdip and SOIC