AD636KH

Overview

The AD636KH is a low-power monolithic true RMS-to-DC converter designed for low-level signal processing. It operates on single or dual supplies ranging from 2.5 V to 16 V with a quiescent current of 800 μA. The device features a 200 mV full-scale input range and provides accurate conversion for complex waveforms with crest factors up to 6, maintaining an additional error of less than 0.5%. Factory laser trimming ensures high accuracy without external adjustments. It includes an auxiliary dB output and integrated buffer/driver capabilities.

Feature Summary

• Performs true root-mean-square to direct-current conversion on low-level signals
• Factory laser-trimmed for high accuracy without requiring external calibration
• Includes an auxiliary logarithmic output for decibel measurements
• Features integrated input and output buffering with short-circuit protection

Applications

• Battery-powered portable instruments
• Complex waveform measurement systems
• Low-level signal analysis in test equipment

Procurement Notes

Verify the specific suffix against official Analog Devices documentation to confirm pinout compatibility and accuracy grade. Ensure supply voltage requirements match the application's power constraints. Confirm package type matches the intended PCB layout. Cross-reference datasheet revisions for any functional updates.

Selection Notes

Select this component when precise RMS calculation of low-amplitude signals is required. It is suitable for applications demanding low power consumption and high accuracy without external trimming. Consider the 200 mV input range and available supply voltages during system design.

Part Context

The AD636 series consists of low-cost, low-power true RMS-to-DC converters. The AD636KH variant specifically denotes a version with enhanced accuracy specifications compared to standard models. It is part of Analog Devices' portfolio of precision analog signal processing components.

Replacement Considerations

AD636KHZ

FAQ

What is the maximum crest factor supported by the AD636KH?

The device accommodates signal crest factors up to 6 with less than 0.5% additional error.

Does the AD636KH require external adjustment for full rated accuracy?

No, the device is factory laser-trimmed at the wafer level, eliminating the need for external adjustments.