AD737KR-REEL7

Overview

The AD737KR-REEL7 is a low power, precision, monolithic true RMS-to-DC converter manufactured by Analog Devices Inc. It computes the true RMS value of an input signal and provides a DC output proportional to that value. The device features a wide power supply range from ±2.5 V to ±16.5 V and operates with a typical standby current of 25 µA. It offers high accuracy with a maximum error of ±0.2 mV ± 0.3% of reading for sine wave inputs and maintains performance across various waveform types including variable duty cycle pulses. The component utilizes a 8-lead SOIC surface-mount package.

Feature Summary

• Computes true RMS values for diverse input waveforms
• Provides direct interfacing capability with standard ADCs
• Features high input impedance and low bias current
• Requires no external trims for specified accuracy

Applications

• Upgrading non-RMS precision rectifier circuits
• Signal processing in measurement systems
• Audio and vibration analysis equipment

Procurement Notes

Verify the specific suffix KR-REEL7 against official Analog Devices documentation to confirm tape-and-reel packaging and industrial temperature grade specifications. Ensure compatibility with existing board layouts for the 8-lead SOIC footprint. Confirm availability status through authorized distributors as supply conditions may vary.

Selection Notes

Select this component when precise RMS conversion is required for complex waveforms beyond simple sine waves. Consider the low power consumption and single-supply or dual-supply flexibility. Evaluate the need for the specific surface-mount package and reel quantity compared to through-hole alternatives like the AD737ANZ.

Part Context

The AD737 series represents Analog Devices' solution for accurate RMS-to-DC conversion. The AD737KR-REEL7 variant specifically denotes the industrial temperature range version packaged in a tape-and-reel format suitable for automated surface-mount assembly processes within the broader AD737 product family.

Replacement Considerations

The AD736 serves as a functional alternative if a positive-going output signal is preferred over the negative-going output of the AD737. Verify pinout compatibility and output polarity requirements before substitution.