AD2S1210ASTZ

Overview

The AD2S1210ASTZ is a monolithic resolver-to-digital converter (RDC) from Analog Devices, packaged in a 48-lead LQFP. It provides variable resolution from 10-bit to 16-bit and integrates an on-board programmable sinusoidal oscillator for resolver excitation. The device accepts differential sine/cosine input signals with amplitudes between 2.3 V p-p and 4.0 V p-p at frequencies of 2 kHz to 20 kHz. It features a Type II tracking loop for continuous position data output without conversion delay. The component operates on a single 5 V supply with logic interface voltages ranging from 2.3 V to 5.25 V, supporting both parallel and serial digital interfaces.

Feature Summary

• Integrated programmable sinusoidal oscillator providing excitation frequencies from 2 kHz to 20 kHz.
• Type II servo tracking loop enabling maximum tracking rates up to 3125 rps at 10-bit resolution.
• Triple format position data access via 16-bit parallel port, 4-wire serial interface, or incremental encoder emulation outputs.
• Built-in system fault detection circuitry capable of sensing signal loss, overrange conditions, and tracking loss.

Applications

• DC and AC servo motor control
• Electric power steering systems
• Encoder emulation
• Automotive motion sensing and control

Procurement Notes

Verify the specific grade suffix 'A' against the manufacturer's ordering guide to confirm the operational temperature range and accuracy specifications. Ensure that the required resolution setting aligns with the supported frequency ranges defined in the datasheet specifications table.

Selection Notes

Select this component when a complete RDC solution with integrated excitation is required. Confirm that the application's clock input frequency falls within the 6.144 MHz to 10.24 MHz range. Verify that the resolver input signal amplitude remains within the 2.3 V p-p to 4.0 V p-p limits to ensure proper operation of the Type II tracking loop.

Part Context

The AD2S1210ASTZ belongs to the AD2S1210 family of high-performance resolver-to-digital converters. This series is designed for applications requiring precise angular position and velocity feedback. The ASTZ variant specifically denotes the A-grade version of the device, which typically offers standard industrial performance characteristics compared to higher precision B or D grades.

Replacement Considerations

Consult the official Analog Devices ordering guide for direct pin-compatible alternatives such as the AD2S1210BSTZ or AD2S1210CDSTZ. Substitution requires verification of the operating temperature range and angular accuracy specifications to ensure compatibility with the existing design requirements.

FAQ

What is the maximum tracking rate of the AD2S1210?

The maximum tracking rate is 3125 rps when operating at 10-bit resolution with a clock input frequency of 10.24 MHz.

How is the resolution configured on the AD2S1210?

Resolution is user-selectable between 10, 12, 14, and 16 bits by configuring the RES0 and RES1 logic inputs.

What are the valid input signal voltage ranges for the SIN and COS pins?

The sine and cosine inputs accept differential sinusoidal waveforms with voltage amplitudes ranging from 2.3 V p-p to 4.0 V p-p.