The AD636 is a low power monolithic IC that performs true rms-to-dc conversion on low level signals. It offers performance that is comparable or superior to that of hybrid and modular converters costing much more. The AD636 integrates a current mirror, squarer, divider, and absolute value circuit to provide 0.5% maximum error (AD636K) or 1.0% maximum error (AD636J) true rms-to-dc conversion. The AD636's input signal voltage range is 100 mV to 10 V, and it can be operated from a single or dual supply. The AD636's power dissipation is only 800 μA quiescent current, making it an ideal solution for portable and battery-powered applications.
The AD636 is a low power monolithic integrated circuit designed to perform true root-mean-square (rms) to direct current (dc) conversion on low-level signals ranging from 0 mV to 200 mV rms. It features laser-trimmed high accuracy, with versions available offering maximum errors of 0.5% or 1.0%, and can accommodate signal crest factors up to 6.
| Full Scale Range | 0 to 200 mV rms |
|---|---|
| Maximum Error (AD636K) | 0.5% |
| Quiescent Current | 800 A typical |
| Operating Temperature Range | 0°C to +70°C |
The maximum error for the AD636K version is 0.5%.
The typical quiescent current is 800 A.