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, with a maximum full-scale frequency of 2 MHz determined by an external system clock. The device operates on dual or single power supplies and features a precision internal reference voltage source. It is housed in a 16-pin CERDIP package and supports industrial operating temperatures ranging from -40°C to +85°C.

Feature Summary

• Synchronous voltage-to-frequency conversion using an internal phase-locked loop for inherent monotonicity
• High linearity performance with minimal gain drift due to laser-wafer adjusted internal resistors
• Integrated precision low-drift reference voltage source eliminating the need for critical external components

Applications

• Precision analog signal digitization for sensor data acquisition
• Isolated signal transmission via optical couplers or transformers
• Motor control systems requiring speed or position feedback generation
• Industrial instrumentation such as flowmeters and tachometers

Procurement Notes

Verify component authenticity through authorized distributors or certified suppliers. Confirm the specific suffix matches the required industrial temperature range and package type. Check for RoHS compliance status as manufacturing sites may vary. Ensure proper handling procedures are followed during storage and installation to maintain device integrity.

Selection Notes

Select this component when high linearity and wide dynamic range are required for voltage-to-frequency conversion. Consider the external clock dependency for defining full-scale output frequency. Evaluate power supply requirements for both dual and single supply configurations. Assess thermal management needs within the specified industrial temperature operating range.

Part Context

The AD652 belongs to the AD652 family of synchronous voltage-to-frequency converters. The AQ suffix denotes the 16-pin ceramic dual in-line package variant rated for industrial temperature operation. This series provides a robust solution for applications demanding precise analog-to-digital conversion without complex external circuitry.

Replacement Considerations

No verified public substitute part numbers are available for direct replacement.