GENERAL DESCRIPTION
The AD636 is a low power monolithic IC that performs true rms-to-dc conversion on low level signals. It offers performance that is comparable or superior to that of hybrid and modular converters costing much more. The AD636 is specified for a signal range of 0 mV to 200 mV rms. Crest factors up to 6 can be accommodated with less than 0.5% additional error, allowing accurate measurement of complex input waveforms.
   
FEATURES
    True rms-to-dc conversion
    200 mV full scale
    Laser-trimmed to high accuracy
        0.5% maximum error (AD636K)
        1.0% maximum error (AD636J)
    Wide response capability
        Computes rms of ac and dc signals
        1 MHz, −3 dB bandwidth: V rms > 100 mV
        Signal crest factor of 6 for 0.5% error
    dB output with 50 dB range
    Low power: 800 μA quiescent current
    Single or dual supply operation
    Monolithic integrated circuit
    Low cost