AD737BQ

Overview

The AD737BQ is a low power, precision, monolithic true RMS-to-DC converter manufactured by Analog Devices Inc. It computes the true RMS value of analog signals with high accuracy, maintaining performance across various input waveforms including variable duty cycle pulses and phase-controlled sine waves. The device features a wide power supply range from ±2.5 V to ±16.5 V and offers direct interfacing capabilities with 3½ digit CMOS ADCs. It provides a negative-going output and requires no external trims for specified accuracy.

Feature Summary

• Computes true RMS values for diverse signal types
• High input impedance with low bias current
• Direct interface compatibility with standard ADCs

Applications

• Upgrading non-RMS precision rectifier performance
• Signal processing in measurement systems
• Power monitoring applications

Procurement Notes

Verify the specific suffix 'BQ' against official Analog Devices documentation to confirm temperature grade and package configuration. Ensure compliance with relevant regulatory standards such as RoHS if applicable. Confirm pinout compatibility with existing PCB layouts before procurement.

Selection Notes

Select this component when precise RMS conversion is required for complex waveforms. Consider the negative output polarity relative to system requirements. Evaluate power supply constraints against the specified ±2.5 V to ±16.5 V range. Compare performance metrics with alternative converters if cost or size is critical.

Part Context

The AD737 series includes variants like the AD736, which provides a positive output version of the same basic device. The AD737 family is designed for low-cost, high-performance RMS-to-DC conversion tasks. The BQ designation typically indicates specific manufacturing lot or qualification details within the Analog Devices portfolio.

Replacement Considerations

The AD736 serves as a functional equivalent with opposite output polarity. Verify electrical specifications and pin compatibility before substitution. Consult official datasheets for detailed parameter comparisons.