AD2S80ATE

Overview

The AD2S80ATE is a monolithic tracking resolver-to-digital converter manufactured on a BiMOS II process. It provides user-selectable resolution of 10, 12, 14, or 16 bits via SC1 and SC2 pins. The device converts sinusoidal resolver signals into parallel natural binary digital words using ratiometric tracking conversion. Key electrical parameters include a maximum tracking rate of 16.25 rps at 16-bit resolution, an angular accuracy of ±1 LSB (±4 arc min for the 'T' grade), and operation over a reference frequency range of 50 Hz to 20,000 Hz. It requires dual power supplies of ±12 V dc and a logic supply of 5 V dc.

Feature Summary

• User-selectable resolution: 10, 12, 14, or 16 bits configured by SC1/SC2 logic states.
• Ratiometric tracking conversion providing high noise immunity and tolerance to lead length.
• Analog velocity output proportional to rotation speed, linear to typically one percent.
• Military temperature range version (-55°C to +125°C) available in 40-lead DIP package.

Applications

• DC Brushless and AC Motor Control
• Robotics and Axis Control
• Military Servo Control

Procurement Notes

Verify that the ordering suffix 'ATE' corresponds to the military temperature range (-55°C to +125°C) and the 40-lead DIP package as specified in the manufacturer's documentation. Confirm that the component meets MIL-STD-883B Class B requirements if such qualification is required for the application. Ensure power supply polarities are strictly maintained to prevent damage.

Selection Notes

Select external components R4 and R6 based on the chosen resolution and desired maximum tracking rate. For 16-bit resolution, the maximum tracking rate is limited to 16.25 rps. Ensure the reference signal frequency is within the 50 Hz to 20,000 Hz range. Use preferred value resistors and capacitors with 5% tolerance to maintain performance without degrading overall system accuracy.

Part Context

The AD2S80A series includes commercial (JD/KD/LD), industrial (AD/BD), and extended/military (SD/SE/TD/TE/UD/UE) temperature grades. The AD2S80ATE specifically denotes the extended/military temperature variant housed in a 40-lead ceramic DIP package. Other models in the family may offer different packages, such as the 44-terminal LCC, or lower temperature ranges.

Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the source material. When evaluating alternatives, ensure compatibility with the BiMOS II architecture, 40-lead DIP footprint, and ±12 V dual supply requirement. Verify that any replacement supports the specific 16-bit resolution and military temperature range specifications.

FAQ

How is the resolution of the AD2S80ATE selected?

Resolution is set by the logic states of the SC1 and SC2 pins: 0/0 for 10 bits, 0/1 for 12 bits, 1/0 for 14 bits, and 1/1 for 16 bits.

What is the maximum tracking rate for 16-bit resolution?

At 16-bit resolution, the maximum tracking rate is 16.25 revolutions per second (rps).

Can the AD2S80ATE replace a tachogenerator?

Yes, the analog velocity output is linear to typically one percent and can be used in place of a conventional tachogenerator for loop stabilization and velocity feedback.