AD2S82AHP-REEL

Overview

The AD2S82AHP-REEL is a monolithic tracking-type Resolver-to-Digital Converter (RDC) manufactured by Analog Devices Inc. It utilizes BiMOS II technology to integrate high-precision bipolar linear circuits with CMOS logic on a single chip. The device operates as a Type II servo loop system, continuously comparing internal digital angles with analog resolver inputs to generate error signals that drive a voltage-controlled oscillator and reversible counter. This architecture enables real-time angle updates without conversion latency. Key electrical parameters include a supply voltage range of ±10.8V to ±13.2V, a maximum signal frequency of 20 kHz, and a maximum tracking rate of 16.25 revolutions per second in its highest resolution mode. It supports programmable resolutions of 10, 12, 14, or 16 bits via external pin configurations.

Feature Summary

• Implements a closed-loop tracking architecture using phase-sensitive demodulation and integral control for continuous, low-latency angle conversion.
• Offers user-configurable resolution settings from 10-bit to 16-bit through external pin programming to balance precision and tracking speed.
• Provides parallel digital output alongside velocity and direction indication signals for comprehensive motion feedback.
• Integrates R-2R DAC and VCO components on-chip to minimize external component count and simplify system design.

Applications

• High-performance AC servo motor control systems requiring precise position feedback.
• Industrial machine tool axes demanding robust resolver signal processing.
• Robotics joint positioning loops utilizing rotary transformers.
• Aerospace actuator control units operating in harsh environments.

Procurement Notes

Verify the specific suffix 'REEL' indicates tape-and-reel packaging rather than tube packaging when sourcing. Confirm the temperature grade matches application requirements, as commercial variants typically operate between 0°C and 70°C. Ensure the order includes the correct moisture sensitivity level handling procedures. Cross-reference the datasheet revision to confirm pinout compatibility with existing designs. Validate that the manufacturer part number corresponds exactly to the intended resolution and package type.

Selection Notes

Select this component when a tracking-type converter is preferred over successive approximation architectures for zero-latency response. Consider the trade-off between resolution and maximum tracking speed; higher bit depths reduce the maximum allowable shaft rotation rate. Verify that the external reference clock frequency aligns with the device's input specifications. Evaluate the need for velocity outputs, which are natively supported by this RDC family. Ensure the power supply rails can provide the required ±10.8V to ±13.2V range for optimal performance.

Part Context

The AD2S82AHP belongs to the AD2S82 family of resolver-to-digital converters, designed for applications requiring high reliability and accuracy. It serves as a foundational component in analog servo systems where traditional digital encoders may fail due to environmental conditions. The device represents a classic solution for converting sinusoidal resolver signals into usable digital data for microprocessors or PLCs.

Replacement Considerations

The AD2S82ALPZ is a verified equivalent offering identical functionality in a leaded PLCC package. The AD2S82AJPZ provides similar capabilities but with an extended industrial temperature range. Substitution requires verifying package footprint compatibility and ensuring the replacement variant meets the specific thermal and mechanical constraints of the target assembly.