AD652AQ/+

Overview

The AD652AQ/+ is a monolithic synchronous voltage-to-frequency converter manufactured by Analog Devices Inc. It utilizes an internal phase-locked loop architecture to achieve high linearity and low temperature drift. The device accepts analog voltage inputs and generates a corresponding digital pulse frequency output, with a maximum frequency capability of 2 MHz. It is housed in a 16-pin CERDIP package and supports both single and dual power supply configurations for industrial applications.

Feature Summary

• Synchronous operation via internal phase-locked loop for enhanced accuracy
• High linearity performance minimizing integral nonlinearity errors
• Low temperature coefficient ensuring stable output across operating ranges
• Integrated reference voltage generation simplifying circuit design

Applications

• Precision data acquisition systems requiring analog-to-digital conversion
• Isolated signal transmission using optical or magnetic couplers
• Industrial instrumentation such as flow meters and tachometers
• Motor control feedback loops for speed and position sensing

Procurement Notes

Verify the specific suffix designation against current manufacturer documentation to confirm exact electrical tolerances and package variations. Confirm RoHS compliance status as historical batches may differ from current production runs. Check component availability and lifecycle status through authorized distributors prior to finalizing procurement plans.

Selection Notes

Select this component when high linearity and synchronous clocking are required for voltage-to-frequency conversion. Ensure the application environment supports the specified operating temperature range and power supply requirements. Verify that the 16-pin ceramic DIP package fits the target PCB layout constraints and thermal management needs.

Part Context

This part belongs to the AD652 family of voltage-to-frequency converters designed for precision measurement applications. The AQ variant typically denotes an extended industrial temperature range compared to commercial grades. It serves as a bridge between analog sensor signals and digital processing systems in demanding environments.

Replacement Considerations

Consult official substitution lists for updated equivalents. Verify pin compatibility and electrical specifications before replacing legacy units with newer package variants or alternative manufacturers.