AD737JR-5-REEL

Overview

The AD737JR-5-REEL is a low power, precision monolithic true RMS-to-DC converter manufactured by Analog Devices Inc. It operates within a supply voltage range of 2.5 V to 16.5 V and draws a typical working current of 160 µA. The device provides high accuracy with a maximum error of ±0.2 mV plus 0.3% of the reading for sine wave inputs. It features a negative-going output and supports signal crest factors up to 5. Packaged in an SOIC-8 surface-mount format, it functions effectively across temperatures from -40°C to +85°C.

Feature Summary

• Computes true RMS values for various input waveforms including variable duty cycle pulses
• Provides direct interfacing capability with 3½ digit CMOS ADCs
• Maintains high accuracy without requiring external trims

Applications

• Upgrading performance of non-RMS precision rectifiers
• Measurement of triac phase-controlled sine waves
• Applications requiring direct interface with digital multimeters

Procurement Notes

Verify the specific suffix against official documentation to confirm package type and temperature grade. Confirm availability status as distribution channels may indicate restricted supply. Ensure the reel packaging matches production requirements. Cross-reference the manufacturer part number with the latest datasheet revision to validate electrical specifications before integration.

Selection Notes

Select this component when precise RMS conversion is required for complex waveforms beyond simple sine waves. Consider the negative output polarity during circuit design. Evaluate the low power consumption benefits for battery-operated systems. Verify that the input scaling requirements align with the 200 mV full-scale input range specification.

Part Context

This device belongs to the AD737 series of precision analog converters. It serves as a cost-effective alternative to discrete solutions for RMS measurement. The monolithic construction ensures stability and reduces board space compared to traditional precision rectifier circuits. It represents a specialized PMIC solution for signal processing applications.

Replacement Considerations

The AD736 is a positive output version of the same basic device architecture. Verify compatibility if positive output polarity is required instead of the negative output provided by the AD737.