AD2S1200YSTZ

Overview

The AD2S1200YSTZ is a 12-bit resolver-to-digital converter from Analog Devices, housed in a 44-lead LQFP package. It operates on a single 5.0 V supply within a temperature range of -40°C to +125°C. The device integrates a programmable sinusoidal oscillator for resolver excitation and accepts differential Sin/Cos inputs with a peak-to-peak voltage of 3.6 V ± 10%. It provides absolute position and velocity data via parallel or serial interfaces, achieving an accuracy of ±11 arc minutes (Y Grade) and supporting a maximum tracking rate of 1,000 rps.

Feature Summary

• Complete monolithic R/D converter with integrated programmable sinusoidal oscillator
• Triple format position data: 12-bit absolute binary, incremental encoder emulation (A QUAD B), and digital velocity output
• System fault detection for loss of signal, signal degradation, and loss of tracking
• Compatible with DSP and SPI interface standards via 3-wire serial or 12-bit parallel ports

Applications

• Electric power steering systems
• Electric vehicles and integrated starter generators
• Automotive motion sensing and control
• Encoder emulation applications

Procurement Notes

Verify the specific grade suffix (e.g., YSTZ vs WSTZ) against the datasheet ordering guide, as angular accuracy specifications differ between grades. Confirm that the required external 8.192 MHz crystal is included in the system design, as it is mandatory for clock generation. Ensure ESD precautions are observed during handling due to the device's sensitivity.

Selection Notes

Select the AD2S1200YSTZ for applications requiring 12-bit resolution and ±11 arc minute accuracy at zero acceleration. Verify that the system can accommodate the fixed internal bandwidth of approximately 1.7 kHz. Ensure the design supports the required 5.0 V ± 5% supply voltage and utilizes separate screened twisted cables for analog inputs to maintain dynamic performance.

Part Context

This component belongs to the AD2S1200 series of resolver-to-digital converters. It serves as a complete interface solution for digitizing resolver signals, replacing discrete analog front-end circuits. The device is designed for high-reliability automotive and industrial environments where robust position feedback is critical.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.