AD2S44UM14

Overview

The AD2S44UM14 is a dual-channel, 14-bit synchro/resolver-to-digital converter manufactured by Analog Devices. It utilizes a continuous tracking principle to convert analog shaft positions into digital data without external commands. The device features two independent Type II servo loop converters within a single 32-lead hybrid package. Key electrical specifications include a typical accuracy of ±2.6 arc minutes between -25°C and +85°C, a maximum tracking rate of 20 revolutions per second, and support for signal frequencies ranging from 400 Hz to 2600 Hz. It operates on ±15 V power supplies with quiescent current consumption of approximately 80 mA and 45 mA for positive and negative rails respectively.

Feature Summary

• Dual-channel architecture with independent Type II servo loops in a 32-lead hybrid package
• 14-bit resolution with parallel natural binary output coding
• Built-in test (BIT) facility for fault detection and failsafe system integration
• Independent reference inputs allowing different frequencies for each channel

Applications

• Gimbal and gyro control systems
• Robotics positioning
• Engine controllers
• Military servo control systems
• CNC machine tooling

Procurement Notes

Verify the specific ordering suffix against the manufacturer's guide to confirm signal voltage options (e.g., 90 V or 11.8 V) and reference voltage configurations. Ensure the temperature range and accuracy grade match the application requirements, as the UM14 designation implies specific operational limits. Confirm availability status directly with Analog Devices or authorized distributors, as legacy hybrid components may have limited production runs.

Selection Notes

Select this component when space, weight, and cost are critical constraints for dual-axis position sensing. The ratiometric conversion technique provides excellent noise immunity suitable for long lead lengths. Consider the acceleration constant of 62,000 sec⁻² for dynamic applications requiring high-speed tracking. Verify that the input signal format (synchro vs. resolver) matches the physical transducer connections before finalizing the part number.

Part Context

The AD2S44 series represents a low-cost solution for high-reliability angular position conversion. It combines monolithic BiMOS II integrated circuits with hybrid packaging to minimize internal component count while ensuring high reliability. The device is designed for environments where traditional discrete solutions would be too bulky or expensive, offering a compact alternative to larger multi-chip modules.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. For direct replacements, consult Analog Devices for current equivalents or verify pin compatibility with other SDC/RDC series converters such as the AD2S80A, noting differences in resolution and package type.