AD737JR-5-REEL7

Overview

The AD737JR-5-REEL7 is a low power, precision monolithic true RMS-to-DC converter manufactured by Analog Devices Inc. It operates within a wide supply voltage range of 2.5 V to 16.5 V and consumes only 160 µA of working power current. The device features a SOIC-8 surface-mount package and supports an operating temperature range from -40°C to +85°C. Designed for high accuracy, it provides a maximum error of ±0.2 mV ± 0.3% of reading with sine wave inputs. The component delivers a negative-going output signal suitable for direct interfacing with digital converters.

Feature Summary

• Computes true RMS values for various input waveforms including variable duty cycle pulses
• Provides absolute value computation and average rectified value outputs
• Features high input impedance of 10^12 Ω with minimal input bias current
• Requires no external trims to maintain specified accuracy levels

Applications

• Upgrading performance of non-RMS precision rectifiers
• Direct interfacing with 3½ digit CMOS ADCs
• Measuring triac phase-controlled sine waves
• Signal processing for variable duty cycle pulse inputs

Procurement Notes

Verify the specific suffix REEL7 indicates reel packaging when sourcing this component. Confirm that the JR variant meets the required industrial temperature specifications for your application environment. Ensure compatibility with the negative-going output polarity inherent to the AD737 series design before integration into existing circuit architectures.

Selection Notes

Select this component when precise RMS conversion is required for complex waveforms beyond simple sine waves. Consider the negative output polarity and the need for appropriate scaling if input signals exceed the 200 mV full-scale range. Evaluate the low standby current requirement against system power constraints to leverage its efficiency benefits in battery-operated or low-power designs.

Part Context

This part belongs to the AD737 series of true RMS-to-DC converters. It shares core functionality with the positive-output AD736 but differs in output polarity. The series is designed for applications demanding high accuracy without external trimming. It serves as a cost-effective alternative to discrete solutions for RMS measurement tasks.

Replacement Considerations

The AD736 is a confirmed substitute offering identical functionality with positive-going output. Verify that the system can accommodate the polarity difference between the AD737 and AD736 variants before swapping components.