AD736AR-REEL

Overview

The AD736AR-REEL is a low power, precision, monolithic true RMS-to-DC converter manufactured by Analog Devices Inc. It converts AC voltage waveforms to DC voltages representing the true RMS, average rectified, or absolute value. The device features a 200 mV RMS full-scale input range and high input impedance of 10^12 Ω with a maximum bias current of 25 pA. It maintains high accuracy with a maximum error of ±0.3 mV ± 0.3% of reading for sine wave inputs. The component operates on a wide power supply range from +2.8 V, -3.2 V to ±16.5 V, drawing a maximum supply current of 200 µA. It includes a buffered voltage output and requires no external trims.

Feature Summary

• Converts AC voltage waveforms to DC voltage representing true RMS, average rectified, or absolute values
• Provides high accuracy with specified maximum error limits for sine wave inputs without external trimming
• Maintains performance across variable duty-cycle pulses and phase-controlled sine waves
• Features buffered voltage output and extremely high input impedance

Applications

• Upgrading performance of non-RMS precision rectifiers
• Measurement of variable duty-cycle pulse signals
• Analysis of triac phase-controlled sine waves
• Precision AC voltage measurement systems

Procurement Notes

Verify the specific suffix AR-REEL indicates reel packaging when sourcing. Confirm RoHS compliance status through official documentation as availability varies. Ensure the supplier provides valid traceability for the Analog Devices manufacturer part number. Check for any regional distribution restrictions prior to ordering. Validate that the component matches the required SOIC-8 surface mount package specifications.

Selection Notes

Select this component when true RMS conversion accuracy is critical for non-sinusoidal waveforms. Consider the 200 mV RMS input range limitation and potential need for input attenuation for larger signals. Evaluate the 200 µA supply current against system power constraints. Compare against the AD737 if negative output polarity or standby control is required instead.

Part Context

The AD736 series represents a family of low-cost, low-power true RMS-to-DC converters designed for precision applications. The AD736AR-REEL variant specifically denotes the surface-mount SOIC-8 package configuration supplied in reel format. This component serves as a direct replacement for discrete precision rectifier circuits, offering superior accuracy at comparable costs within the Analog Devices signal conditioning portfolio.

Replacement Considerations

The AD737 is a related device featuring power-down control and negative output polarity. Verify interface compatibility and output polarity requirements when substituting.