AD536AJDZ

AD536 is a complete monolithic integrated circuit that performs true rms-to-dc conversion. It offers performance comparable or superior to that of hybrid or modular units costing much more. It directly computes the true rms value of any complex input waveform containing ac and dc components. A crest factor compensation scheme allows measurements with 1% error at crest factors upto 7. The wide bandwidth of the device extends the measurement capability to 300KHz with less than 3dB errors for signal levels greater than 100mV. An important feature of the device, not previously available in rms converters, is an auxiliary dB output pin. The logarithm of the rms output signal is brought out to a separate pin to allow the dB conversion, with a useful dynamic range of 60dB. Using an externally supplied reference current, the 0dB level can be conveniently set to correspond to any input level from 0.1V to 2V rms.

• True rms-to-dc conversion
• Total error, internal trim is ± 0.5mV ±% of rdg maximum
• Computes rms of ac and dc signals
• Signal crest factor of 7 for 1% error
• Single- or dual-supply operation, monolithic integrated circuit
• 450KHz typical -3dB bandwidth
• Quiescent current is 1.2mA typical
• Operating temperature range from 0°C to +70°C
• Package style is 14-lead side-brazed ceramic dual in-line [SBDIP]