AD654JR

Overview

The AD654JR is a voltage-to-frequency converter manufactured by Analog Devices Inc. It operates within a full-scale frequency range of 500 kHz and exhibits an integral nonlinearity of ±0.2%. The device supports single or dual power supplies and functions across a temperature range from -40°C to +85°C. It is housed in an 8-SOIC surface-mount package with a width of 3.90mm.

Feature Summary

• Performs conversion between analog voltage inputs and digital frequency outputs
• Provides high linearity performance for precision signal processing applications

Applications

• Industrial process control systems requiring precise measurement
• Data acquisition modules utilizing frequency-based transmission
• Instrumentation circuits needing isolation via optical couplers

Procurement Notes

Verify component status carefully as the AD654JR is listed as obsolete on major distributor platforms. Confirm availability through authorized channels or alternative sources, noting that lead times may be extended due to limited stock. Ensure compatibility with existing designs before procurement given the discontinuation status.

Selection Notes

Select this component only if legacy design compatibility is required. Evaluate alternative modern V/F converters for new projects due to end-of-life status. Verify pinout and electrical specifications match system requirements, particularly regarding supply voltage ranges and operating temperature constraints.

Part Context

Part of the AD654 series of voltage-to-frequency converters. Designed for applications requiring accurate frequency generation proportional to input voltage. Commonly used in industrial instrumentation where long-term stability and linearity are critical parameters for signal integrity.

Replacement Considerations

• AD654JN