AD650AD

Overview

The AD650AD is a monolithic voltage-to-frequency and frequency-to-voltage converter manufactured by Analog Devices Inc. It operates with dual power supplies within an industrial temperature range of −25°C to +85°C. The device features a full-scale frequency range up to 1 MHz, with typical nonlinearity of 0.002% at 10 kHz and 0.07% at 1 MHz. Input offset voltage is trimmable to zero, and the open-collector output supports CMOS or TTL logic compatibility. It utilizes charge balance architecture for high-resolution analog-to-digital conversion.

Feature Summary

• Provides high-speed voltage-to-frequency and frequency-to-voltage conversion with very low nonlinearity.
• Features separate analog and digital grounds to prevent ground loops in precision applications.
• Supports unipolar, bipolar, or differential input configurations via flexible input circuitry.
• Offers user-programmable input signal range and full-scale output frequency using external components.

Applications

• High-resolution analog-to-digital conversion
• Isolated analog signal transmission
• Precision stepper motor speed controllers

Procurement Notes

Verify the specific suffix 'AD' confirms the ceramic package and industrial temperature rating (-25°C to +85°C). Confirm current availability status as supply may be limited. Ensure the datasheet revision matches the design requirements for electrical specifications.

Selection Notes

Select this component when industrial temperature operation and ceramic packaging are required. Consider the AD650BD for similar performance if available. Evaluate external capacitor selection for optimal linearity at target frequencies. Verify power supply decoupling requirements for high-frequency stability.

Part Context

The AD650AD belongs to the AD650 family of V/F and F/V converters. It shares core functionality with plastic packaged variants like the AD650JN but differs in package material and operating temperature range. The 'AD' suffix specifically denotes the ceramic DIP-14 package suitable for harsh environments.

Replacement Considerations

Public confirmed substitute part numbers: AD650BD.