AD736KRZ

The AD736KRZ from Analog Devices is a low power, precision, monolithic true RMS-to-DC converter. It is designed to convert an AC voltage waveform to a DC voltage, providing true RMS, average rectified, or absolute value outputs. The device features a 200 mV rms full-scale input range and maintains high accuracy with a maximum error of ±0.3 mV ± 0.3% of reading for sine wave inputs.

This converter is suitable for measuring a wide range of input waveforms, including variable duty-cycle pulses and triac-controlled sine waves. It can also compute the RMS value of both AC and DC input voltages. With a high input impedance of 10^12 Ω and low input bias current of 25 pA maximum, it ensures precise measurements. The AD736KRZ operates over a wide power supply range from +2.8 V, -3.2 V to ±16.5 V and consumes a maximum of 200 µA supply current, making it ideal for battery-powered applications.

The AD736KRZ is available in an 8-SOIC package and is designed for surface mount applications. Its buffered voltage output and requirement for no external trims for specified accuracy offer design flexibility. This component is suitable for upgrading the performance of non-RMS precision rectifiers in applications like portable multimeters.