AD736JN

The AD736JN 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 maintains high accuracy for input waveforms with crest factors up to 3, and can measure crest factors as high as 5 at the 200 mV full-scale input level with only 2.5% additional error. The AD736JN 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 AD736JN features a high input impedance of 10¹² Ω and a low input bias current of 25 pA maximum. It includes a buffered voltage output and requires no external trims for specified accuracy. The device is available in an 8-PDIP package and is mounted via through-hole method. Its low cost and small size make it suitable for upgrading performance in applications like portable multimeters.