AD2S80ASD/883B

Overview

The AD2S80ASD/883B is a monolithic resolver-to-digital converter manufactured using BiMOS II technology. It provides 10-, 12-, 14-, or 16-bit resolution selectable via SC1 and SC2 pins. The device converts sinusoidal resolver signals into parallel natural binary digital words using a ratiometric tracking method, ensuring high noise immunity. It operates with ±12 V analog supplies and +5 V logic supply. Key features include a velocity output proportional to angular rate, ESD protection of 2 kV, and compliance with MIL-STD-883B Class B standards for military applications.

Feature Summary

• Monolithic BiMOS II construction in a 40-lead DIP package
• User-selectable resolution: 10, 12, 14, or 16 bits
• Ratiometric tracking conversion with up to 1040 RPS at 10-bit resolution
• Analog velocity output and ripple clock/direction indicators
• MIL-STD-883B Class B qualified for extended temperature range (-55°C to +125°C)

Applications

• DC brushless and AC motor control systems
• Military servo control and axis control
• Robotics and numerical control of machine tools
• Process control applications requiring precise angle measurement

Procurement Notes

Verify the /883B suffix indicates MIL-STD-883B Class B processing. Confirm the 'SD' suffix corresponds to the extended temperature grade (-55°C to +125°C) and 40-lead DIP package. Ensure procurement sources provide traceability documentation required for military-grade components.

Selection Notes

Select this component when a single-chip solution for resolver feedback is required. Choose 10-bit resolution for maximum tracking speed (1040 RPS) or higher resolutions for precision. External RC networks must be calculated based on the chosen resolution and reference frequency to set bandwidth and tracking rate. Ensure power supplies are stable within ±10% of nominal values.

Part Context

The AD2S80A is part of Analog Devices' variable resolution resolver-to-digital converter family. The ASD variant specifically denotes the extended industrial/military temperature range version housed in a ceramic DIP package. It serves as a direct replacement for older discrete resolver decoding circuits, integrating phase-sensitive detection, integration, and digital counting on one chip.

Replacement Considerations

Direct pin-compatible replacements within the same family include AD2S80AJD (Industrial Temp) or AD2S80JD (Commercial Temp), though temperature ranges differ. For military specifications, ensure any substitute also carries the /883B qualification suffix.