Rms-to-dc converter features best-in-class dynamic range

Rms-to-dc converter features best-in-class dynamic range

The AD8436 precision monolithic true rms-to-dc converter features ac conversion accuracy to better than ±0.5%. It offers a best-in-class 100 µV to 3 V of usable dynamic range and the ability to measure low signal levels with high accuracy and no drop in settling time. The converter is immune to temperature, crest factor and supply voltage variations. Zero dc offset voltages at the converter output simplify calibration.

The 4 x 4−mm package provides an integrated FET input, precision dc buffer amplifiers, and consumes only 300 µA power. It suits remote, portable battery-powered instrumentation, energy and automotive applications where limited board space and outdoor environments are considerations. The converter extends the crest-factor to 10 — approximately double the current industry-standard digital solution — with minimal loss of accuracy. It is the first rms-to-dc converter specified to operate in the extended industrial temperature range of –40° to 125°C. ($4.95 ea/1,000 — available now.)

By Paul O’Shea

Analog Devices , Wilmington , MA
Sales 800-262-5643
www.analog.com