AD2S1210ASTZ-RL7

Overview

The AD2S1210ASTZ-RL7 is a monolithic resolver-to-digital converter (RDC) with a programmable on-board sinusoidal oscillator. It provides 10-bit to 16-bit resolution absolute position and velocity outputs via parallel or serial interfaces. The device accepts differential sine/cosine inputs of 3.15 V p-p ± 27% at frequencies between 2 kHz and 20 kHz. Operating on a 5 V supply with a 2.3 V to 5.25 V logic interface, it supports a maximum tracking rate of 3125 rps. The component features Type II servo loop tracking, system fault detection, and incremental encoder emulation.

Feature Summary

• Integrated programmable sinusoidal oscillator for resolver excitation
• User-selectable resolution from 10-bit to 16-bit
• Parallel and 4-wire SPI digital data ports
• System fault detection with programmable thresholds
• Incremental encoder emulation output

Applications

• DC and AC servo motor control
• Electric power steering systems
• Automotive motion sensing and control
• Electric vehicles and integrated starter generators

Procurement Notes

Verify the specific grade suffix (A, B, C, or D) against temperature requirements. The A and B grades operate from -40°C to +85°C, while C and D grades support -40°C to +125°C. Confirm that the RL7 reel packaging matches the production line specifications. Ensure the selected grade meets the angular accuracy needs, as B and D grades offer higher precision than A and C grades.

Selection Notes

Select based on required angular accuracy and operating temperature range. B and D grades provide ±2.5 (+1 LSB) arc minutes accuracy, whereas A and C grades provide ±5 (+1 LSB) arc minutes. Choose the resolution setting (10/12/14/16 bits) considering the trade-off between data update rate and precision. Ensure the clock input frequency (CLKIN) aligns with the desired tracking rate and bandwidth specifications.

Part Context

This component belongs to the AD2S1210 family of variable resolution R/D converters. It integrates all necessary analog and digital circuitry for high-precision angle and velocity measurement. The device replaces discrete solutions by combining the tracking loop, ADCs, and oscillator into a single chip, simplifying design for automotive and industrial applications.

Replacement Considerations

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