AD2S80AJD

Overview

The AD2S80AJD is a monolithic resolver-to-digital converter manufactured on a BiMOS II process, housed in a 40-lead ceramic DIP package. It provides user-selectable resolution of 10, 12, 14, or 16 bits via SC1 and SC2 pins. The device employs ratiometric tracking conversion to translate sinusoidal resolver inputs into parallel natural binary digital words. Key electrical parameters include a typical power consumption of 300 mW, operation with ±12 V analog supplies and +5 V logic supply, and a reference frequency range of 50 Hz to 20,000 Hz. At 16-bit resolution, the maximum tracking rate is 16.25 rps.

Feature Summary

• User-selectable resolution (10, 12, 14, or 16 bits) determined by logic states on SC1 and SC2 pins.
• Ratiometric tracking conversion method providing high noise immunity and tolerance to lead length variations.
• Analog velocity output proportional to rotation speed, linear to typically one percent.
• Industrial temperature grade (-40°C to +85°C) with ESD Class 2 protection (2,000 V min).

Applications

• DC Brushless and AC Motor Control
• Process Control Systems
• Numerical Control of Machine Tools
• Robotics Axis Control
• Military Servo Control

Procurement Notes

Verify the ordering suffix 'JD' confirms the commercial temperature range (0°C to 70°C) as specified in the datasheet's recommended operating conditions section. Ensure the procurement source provides documentation confirming the 40-lead DIP package type. Cross-reference the specific revision level of the datasheet to confirm pinout compatibility with existing designs.

Selection Notes

Select external components R4 and R6 based on the chosen resolution and required maximum tracking rate. For 16-bit resolution, ensure the system bandwidth does not exceed the ratio guidelines provided in the component selection section. Verify that the reference signal harmonic distortion remains below 10% to maintain angular accuracy specifications.

Part Context

The AD2S80A series includes variants such as the AD2S80ABD (industrial) and AD2S80AJD (commercial). The 'J' suffix denotes the commercial temperature range, while 'A' indicates the standard performance grade. The device is part of Analog Devices' legacy resolver-to-digital converter portfolio, designed for high-reliability motion control applications requiring precise position feedback.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should verify pinout and electrical parameter compatibility if considering alternative resolver-to-digital converters from other manufacturers.