AD2S1210BSTZ

Overview

The AD2S1210BSTZ is a monolithic resolver-to-digital converter (RDC) with a 48-lead LQFP package. It provides 10-bit to 16-bit resolution for absolute position and velocity outputs. The device integrates a programmable sinusoidal oscillator for resolver excitation, operating between 2 kHz and 20 kHz. It accepts differential sine/cosine inputs of 3.15 V p-p ± 27%. Electrical specifications include AVDD and DVDD supply voltages ranging from 4.75 V to 5.25 V, with a logic interface voltage (VDRIVE) from 2.3 V to 5.25 V. The component supports both parallel and serial data interfaces.

Feature Summary

• Integrated Type II tracking loop providing continuous position output without conversion delay.
• On-board programmable sinusoidal oscillator generating excitation signals from 2 kHz to 20 kHz.
• System fault detection capabilities including loss of signal, overrange, mismatch, and loss of tracking.
• Incremental encoder emulation outputs in standard A-quad-B format with direction indication.

Applications

• DC and AC servo motor control
• Electric power steering systems
• Electric vehicle motion sensing
• Integrated starter generators and alternators

Procurement Notes

Verify the specific grade suffix against project requirements. The BSTZ designation indicates a B-grade device rated for -40°C to +85°C operation. Confirm that the temperature rating aligns with the environmental conditions of the target application before finalizing procurement.

Selection Notes

Select this component when a complete RDC solution with integrated excitation is required. Ensure the system clock frequency falls within the 6.144 MHz to 10.24 MHz range. Verify that the required angular accuracy meets the B-grade specification of ±2.5 (+ 1 LSB) arc minutes if high precision is necessary.

Part Context

This part belongs to the AD2S1210 family of variable resolution R/D converters. Other variants in the series include different temperature grades, such as the C and D grades which extend the operating range to +125°C. The BSTZ variant specifically targets industrial applications requiring the B-grade performance level.

Replacement Considerations

Direct replacements within the same family include AD2S1210ASTZ and AD2S1210CSTZ. Note that these variants differ primarily in their specified operating temperature ranges compared to the BSTZ model.

FAQ

How is the resolution configured?

Resolution is user-selectable at 10, 12, 14, or 16 bits via the RES0 and RES1 hardware pins or through configuration registers.

What is the maximum tracking rate?

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

Can the device operate with a single-ended clock?

Yes, a single-ended clock can be applied directly to the CLKIN pin, provided the XTALOUT pin remains open circuit.