AD736KNZ

Overview

The AD736KNZ is a precision monolithic true RMS-to-DC converter manufactured by Analog Devices Inc. It operates within a wide power supply range of +2.8 V to -3.2 V up to ±16.5 V, consuming a maximum supply current of 200 µA. The device features a 200 mV rms full-scale input range and maintains high accuracy with a maximum error of ±0.3 mV plus 0.3% of the reading for sine wave inputs. It supports signal crest factors up to 5 and provides a buffered voltage output without requiring external trims.

Feature Summary

• Converts AC voltage waveforms to DC representing true RMS, average rectified, or absolute values
• Maintains high accuracy across diverse input waveforms including variable duty-cycle pulses
• Features extremely high input impedance and minimal input bias current

Applications

• Upgrading performance of non-RMS precision rectifiers
• Measurement of triac phase-controlled sine waves
• Signal processing requiring accurate RMS conversion of complex waveforms

Procurement Notes

Verify the specific suffix 'K' against official Analog Devices documentation to confirm temperature grade and package specifications. Ensure compatibility with required operating conditions and interface requirements before procurement. Cross-reference part numbers with authorized distributors to confirm availability and authenticity.

Selection Notes

Select this component when precise RMS measurement of non-sinusoidal signals is required in low-power applications. Consider its wide supply voltage range and lack of need for external trimming as key advantages over discrete solutions. Evaluate thermal performance and input signal characteristics against the specified operational limits.

Part Context

The AD736KNZ belongs to the AD736 family of true RMS-to-DC converters. This series is designed for applications demanding high accuracy and low cost compared to traditional precision rectifier circuits. The device integrates laser trimming to ensure specified performance without external adjustments.

Replacement Considerations

The AD737 is a related device featuring power-down control and negative output. Verify pinout and output polarity differences when substituting.