Overview
The Analog Devices AD2S83IPZ is a precision monolithic resolver-to-digital converter designed for high-accuracy angular position and velocity measurement applications. It converts the analog signals from a resolver into digital outputs, providing high resolution and robust performance in harsh industrial environments. This device is widely used in servo control, robotics, motor feedback systems, aerospace, and other motion control applications.

Functionality and Operation
The AD2S83IPZ functions as a resolver-to-digital converter (RDC), which means it accepts sinusoidal signals from the rotor and stator windings of a resolver and processes them internally to produce a binary digital representation of the shaft angle. It integrates a resolver excitation signal generator, synchronous demodulators, filters, and an analog-to-digital converter (ADC) on a single chip.

The device provides a 14-bit absolute position output with a typical resolution of 0.022° per bit. It also offers velocity output and an internal excitation oscillator for resolver excitation, simplifying system design and minimizing external components.

Key Specifications

* Angular Resolution: 14 bits (16,384 steps per revolution)
* Position Accuracy: ±0.1° typical, ±0.15° maximum
* Operating Supply Voltage: +5 V ±5%
* Supply Current: Typically around 80 mA
* Input Resolver Excitation Frequency: Internal oscillator at 10 kHz or 8 kHz, selectable
* Input Voltage for Resolver: Nominally 3.2 V rms excitation voltage for resolver windings
* Output Format: 14-bit binary absolute position output, velocity output in binary form, available via parallel or serial interface
* Update Rate: Up to 4,000 updates per second, allowing high-speed position tracking
* Operating Temperature Range: -40°C to +85°C industrial grade
* Package Type: 28-lead Plastic DIP (Dual In-line Package), designated by “IPZ” suffix

Performance Characteristics
The AD2S83IPZ achieves high angular accuracy through precise internal synchronous demodulation and filtering of resolver signals. It supports both clockwise and counterclockwise rotation measurement and provides velocity data by differentiating the position signal digitally. Its low total harmonic distortion and noise immunity make it reliable in electrically noisy environments.

Interface and Control Features

* Data Output: Parallel digital output bus for the absolute angular position, allowing direct interface with microprocessors or digital systems.
* Status Signals: Includes a “Data Valid” output to signal when new data is available.
* Excitation Control: Internal oscillator can be turned on/off via control pins, allowing external synchronization if needed.
* Mode Control: Various pins allow configuration of output formats and excitation frequency.

Applications

* Industrial servo motors and drives for position feedback
* Robotics and CNC machine tool control
* Aerospace actuator position sensing
* Automated assembly and inspection systems
* Renewable energy systems such as wind turbine blade pitch control

Advantages

* High-resolution absolute position output improves system precision and repeatability.
* Fully integrated resolver excitation reduces external component count.
* Robust operation over a wide temperature range and noise environment enhances reliability.
* Fast update rate supports dynamic, high-speed motion applications.

Summary
The Analog Devices AD2S83IPZ is a robust and precise resolver-to-digital converter optimized for demanding motion control and position sensing applications. Its high resolution, integrated excitation source, and reliable performance make it a preferred choice where accurate and stable angular measurement is critical.