AD636KDZ

Overview

The AD636KDZ is a low-power monolithic true RMS-to-DC converter manufactured by Analog Devices Inc. It performs accurate conversion on low-level signals within a specified range of 0 mV to 200 mV rms. The device accommodates signal crest factors up to 6 with minimal additional error, enabling precise measurement of complex waveforms. It features a wide response capability with a 1 MHz -3 dB bandwidth for signals exceeding 100 mV rms and provides a logarithmic output with a 50 dB dynamic range. Designed for single or dual supply operation, it draws only 800 μA quiescent current.

Feature Summary

• Performs true root-mean-square to direct-current conversion on low-level input signals
• Laser-trimmed for high accuracy with maximum error specifications defined by the K suffix
• Supports signal crest factors up to 6 while maintaining less than 0.5% additional error
• Provides logarithmic output capability covering a 50 dB dynamic range

Applications

• Measurement of complex input waveforms requiring true RMS calculation
• Low-level signal processing in precision instrumentation systems
• Applications involving AC and DC signal computation with wide bandwidth requirements
• Power monitoring circuits utilizing logarithmic output characteristics

Procurement Notes

Verify that the ordering suffix KDZ corresponds to the specific accuracy grade and package configuration required for your design. Confirm the manufacturer part number matches the official Analog Devices documentation to ensure the component meets the specified laser-trimmed performance standards. Cross-reference the datasheet revision to validate electrical parameters against your system constraints before finalizing procurement.

Selection Notes

Select this component when designing circuits that require accurate RMS conversion for low-level signals without the cost of hybrid converters. Consider the 1 MHz bandwidth and 800 μA power consumption when evaluating compatibility with your power budget and frequency response needs. Ensure the input signal range falls within the 0 mV to 200 mV rms specification to maintain the stated accuracy levels.

Part Context

The AD636 series represents a family of low-cost, monolithic true RMS-to-DC converters designed to replace more expensive hybrid solutions. The AD636KDZ specifically denotes the version with enhanced accuracy specifications compared to standard variants. This integrated circuit consolidates complex analog processing functions into a single chip, simplifying design implementation for precision measurement applications.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.