AD736BRZ

The AD736BRZ 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. This device features a wide power supply range from +2.8 V and -3.2 V up to ±16.5 V, with a low supply current of only 200 µA maximum, making it ideal for battery-powered applications.

The AD736BRZ offers high accuracy, with a maximum error of ±0.3 mV ± 0.3% of reading for sine wave inputs. It maintains accuracy across various input waveforms, including variable duty-cycle pulses and phase-controlled sine waves. The converter has a high input impedance of 10 GΩ and a low input bias current of 25 pA maximum. It supports RMS conversion with signal crest factors up to 5 at the 200 mV full-scale input range.

Packaged in an 8-SOIC (0.154", 3.90mm Width) surface mount configuration, the AD736BRZ is suitable for compact designs. It requires no external trims for specified accuracy and includes a buffered voltage output for design flexibility. This component is a cost-effective solution for upgrading non-RMS precision rectifiers, offering higher accuracy at a comparable or lower cost.