AD636JH

The AD636JH from Analog Devices is a monolithic integrated circuit designed for true RMS-to-DC conversion of low-level signals. It offers a wide response capability, computing the RMS value of AC and DC signals with a -3 dB bandwidth of 1 MHz for signals above 100 mV RMS. The device boasts laser-trimmed high accuracy, with a maximum error of 1.0% for the J-version.

Key features include a low quiescent current of typically 800 µA, making it suitable for battery-powered applications. It supports single or dual supply operation, ranging from ±2.5 V to ±16.5 V for dual supplies or +5 V to +24 V for single supplies. The input and output terminals are protected, and the input signal can exceed the power supply without damage. The AD636JH is available in a TO-100-10 metal can package and is designed for through-hole mounting.

This converter is specified for a signal range of 0 mV to 200 mV RMS and can accommodate crest factors up to 6 with less than 0.5% additional error. It also includes an auxiliary dB output derived from an internal circuit point. The device is factory-trimmed at the wafer level for input/output offset, waveform symmetry, and full-scale accuracy, eliminating the need for external trims to achieve full-rated accuracy.