AD2S1210CSTZ

Overview

The AD2S1210CSTZ is a monolithic resolver-to-digital converter (RDC) from Analog Devices, designed for high-precision angular position and velocity measurement. It integrates a programmable sinusoidal oscillator to drive resolvers and employs a Type II tracking loop for continuous ratiometric conversion without delay. The device supports user-selectable resolutions of 10, 12, 14, or 16 bits. It features differential sine/cosine inputs accepting 3.15 V p-p signals and provides absolute position and digital velocity outputs via parallel or serial interfaces. Operating on a single 5 V supply with a 2.3 V to 5.25 V logic interface, it is rated for an extended industrial temperature range of −40°C to +125°C.

Feature Summary

• Variable resolution: User-programmable 10-bit to 16-bit angular position and velocity output.
• Integrated oscillator: On-board programmable sinusoidal excitation source (2 kHz to 20 kHz).
• Fault detection: Configurable thresholds for loss of signal, out-of-range inputs, and tracking loss.
• Dual interface: Supports both 16-bit parallel data ports and SPI-compatible serial communication.

Applications

• DC and AC servo motor control systems.
• Electric power steering (EPS) applications.
• Automotive motion sensing and control.
• Encoder emulation in industrial automation.

Procurement Notes

Verify the C-grade suffix indicates the −40°C to +125°C operating temperature range. Confirm package compatibility with LQFP-48 footprints. Ensure AVDD and DVDD supplies are maintained within 4.75 V to 5.25 V. Check that logic levels match the VDRIVE specification for the target microcontroller interface.

Selection Notes

Select this model for applications requiring extended temperature operation up to 125°C. Choose between B and D grades if higher accuracy (±2.5 arc min) is required over A and C grades (±5 arc min). Ensure the system clock frequency (CLKIN) falls within the 6.144 MHz to 10.24 MHz range for optimal dynamic performance.

Part Context

The AD2S1210CSTZ belongs to the AD2S1210 family of resolver-to-digital converters. It shares core architecture with variants like the AD2S1210BSTZ and AD2S1210ASTZ, differing primarily in temperature rating and accuracy grade. The 'C' designation specifically denotes the commercial/industrial temperature extension compared to standard commercial parts.

Replacement Considerations

Direct pin-compatible replacements include other AD2S1210 grades (e.g., AD2S1210BSTZ, AD2S1210ASTZ) provided the accuracy and temperature requirements are met. Verify that substitute parts maintain the same LQFP-48 package and electrical specifications for voltage and clock inputs.