AD8436JCPZ-WP

The AD8436JCPZ-WP from Analog Devices is a precision, low-power True RMS-to-DC converter designed to accurately measure the RMS value of AC waveforms. It is capable of handling complex waveforms generated by switch mode power supplies and triacs.

Key features include a wide bandwidth of 1 MHz at -3 dB for a 300 mV input, and 65 kHz for an additional 1% error. The device boasts high accuracy with a B grade specification of ±10 μV ± 0.25% of reading and a zero converter DC output offset. Its dynamic input range spans from 100 μV rms to 3 V rms (8.5 V p-p) full-scale input, with options for external scaling to accommodate larger inputs.

Designed for flexibility, the AD8436JCPZ-WP operates over a wide power supply range, from ±2.4 V to ±18 V dual or 4.8 V to 36 V single. It consumes a typical low power of 300 µA at ±2.4 V. The converter features a high-impedance FET input buffer and a precision DC output buffer. It is available in compact 4 mm × 4 mm LFCSP and 8 mm × 6 mm QSOP packages, making it suitable for space-constrained applications.

This device provides an accurate DC equivalent of the RMS value without the need for programming or processor overhead, offering a cost-effective solution compared to peak or averaging converters.