AD2S1200YST

Overview

The AD2S1200YST is a complete monolithic 12-bit resolver-to-digital converter (RDC) from Analog Devices. It integrates an on-board programmable sinusoidal oscillator to provide sine wave excitation for resolvers, eliminating the need for external signal generation. The device accepts differential Sin and Cos input signals in the range of 3.6 V p-p ± 10% at frequencies between 10 kHz and 20 kHz. Powered by a single 5.00 V supply, it operates within a temperature range of −40°C to +125°C. An external 8.192 MHz crystal provides the precision time reference required for internal clock division and tracking loop operation.

Feature Summary

• Complete monolithic R/D converter with integrated programmable sinusoidal oscillator
• Parallel and serial 12-bit data ports compatible with DSP and SPI standards
• System fault detection for loss of signal, signal degradation, and loss of tracking
• Absolute position and velocity outputs with incremental encoder emulation

Applications

• Electric power steering systems
• Electric vehicles and motor control
• Integrated starter generator/alternator applications
• Automotive motion sensing and control
• Encoder emulation

Procurement Notes

Verify the specific suffix 'YST' against the manufacturer's current ordering guide to confirm the package type and temperature grade. Confirm availability status as distribution channels may list this component as obsolete or out of production. Ensure the source document matches the exact part number before procurement.

Selection Notes

Select the AD2S1200 when a complete 12-bit resolution solution with built-in excitation is required. The device supports a maximum tracking rate of 1,000 rps and offers ±11 arc minutes of accuracy. Consider the available parallel or serial interface options based on the host controller capabilities. Ensure the application environment stays within the specified −40°C to +125°C operating temperature range.

Part Context

The AD2S1200 belongs to Analog Devices' family of resolver-to-digital converters designed for high-precision angular position measurement. This specific model integrates the reference oscillator, simplifying the design compared to earlier generations that required external excitation sources. It serves as a direct replacement for discrete resolver interface solutions in industrial and automotive sectors.

Replacement Considerations

The AD2S1205 is a functionally similar 12-bit RDC with comparable features. Verify pin compatibility and electrical specifications before substitution. Other models in the AD2S12xx series offer different resolutions or interface options but may require different board layouts.