AD598SD/883B

Overview

The AD598SD/883B is a specialized sensor interface integrated circuit designed for Linear Variable Differential Transformer (LVDT) signal conditioning. Manufactured by Analog Devices, this component operates within a military-grade temperature range of -55°C to +125°C and utilizes a CDIP-20 through-hole package. It functions as a complete front-end solution, integrating an internal oscillator, voltage reference, and demodulation circuitry. The device accepts LVDT input voltages between 100 mV and 3.5 V and provides a proportional voltage output ranging from 2.1 V to 24 V. Key electrical specifications include a maximum supply voltage of 13 V, a typical operating current of 15 mA, and an input bias current of 5 uA.

Feature Summary

• Integrates internal oscillator and voltage reference for simplified system design
• Provides direct analog voltage output proportional to displacement
• Supports wide industrial and military temperature operating ranges

Applications

• Position sensing in aerospace and defense systems
• Industrial automation displacement measurement
• Heavy machinery hydraulic cylinder position feedback

Procurement Notes

Verify authenticity through authorized Analog Devices distributors or qualified suppliers. Request manufacturer test data and traceability documentation. Confirm RoHS status and specific lot codes against project requirements. Ensure proper handling procedures for ceramic dual in-line packages during assembly.

Selection Notes

Select this component when LVDT-based displacement measurement is required in harsh environments. Compare against the commercial AD598JRZ variant if lower cost is prioritized over extended temperature performance. Verify that the CDIP-20 package fits the target PCB layout constraints.

Part Context

This part belongs to the AD598 family of LVDT signal conditioners. The /883B suffix indicates compliance with MIL-PRF-38534 standards for high-reliability applications. It serves as a dedicated interface between magnetic position sensors and control electronics.

Replacement Considerations

• AD598JRZ

FAQ

What is the primary function of the AD598SD/883B?

It conditions LVDT signals by providing excitation, demodulation, and filtering to produce a voltage output proportional to core displacement.

Does the AD598SD/883B require external components for basic operation?

No, it integrates an internal oscillator and voltage reference, minimizing external component count compared to discrete solutions.

What is the output voltage range of this IC?

The device outputs a voltage ranging from 2.1 V to 24 V, corresponding to the full-scale travel of the connected LVDT.