AD737JRZ-R7

Overview

The AD737JRZ-R7 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 operating current of 160 µA. The device is housed in an SOIC-8 surface-mount package and functions across a temperature range of -40°C to +85°C. Designed for high accuracy, it computes true RMS values from input signals with crest factors up to 5, offering direct interfacing capabilities with ADCs.

Feature Summary

• Computes true RMS value from AC input signals
• Provides average rectified value and absolute value outputs
• Features high input impedance and low input bias current
• Requires no external trims for specified accuracy

Applications

• Upgrading performance of non-RMS precision rectifiers
• Direct interfacing with 3½ digit CMOS ADCs
• Measuring variable duty cycle pulses
• Analyzing triac phase-controlled sine waves

Procurement Notes

Verify the specific suffix against official documentation, as distribution listings may vary between reel and cut tape formats. Confirm availability status directly with authorized channels due to potential supply constraints. Ensure the selected variant matches the required packaging quantity and environmental compliance standards for your specific manufacturing process.

Selection Notes

Select this component when precise RMS conversion is required for complex waveforms including pulses and phase-controlled signals. Consider the low power consumption and single-supply operation suitable for battery-powered or energy-efficient designs. Evaluate the SOIC-8 package for space-constrained PCB layouts requiring surface-mount integration.

Part Context

This part belongs to the AD737 series of true RMS-to-DC converters. It shares functional similarities with the AD736 but provides a negative-going output. The device is laser-trimmed to ensure high accuracy without external adjustments, making it a cost-effective solution for precision measurement applications compared to traditional discrete rectifier circuits.

Replacement Considerations

The AD736 serves as a functional alternative with positive output polarity. Verify pin compatibility and output sign requirements before substitution. Other family members like the AD737ARZ offer similar specifications with different temperature grades.