AD2S1205WSTZ

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1. DESCRIPTION

The AD2S1205WSTZ is a complete 12-bit resolution tracking resolver-to-digital converter that contains an on-board programmable sinusoidal oscillator providing sine wave excitation for resolvers. The converter accepts 3.15 V p-p ± 27% input signals on the Sin and Cos inputs. A Type II tracking loop is employed to track the inputs and convert the input Sin and Cos information into a digital representation of the input angle and velocity. The maximum tracking rate is a function of the external clock frequency. The performance of the AD2S1205WSTZ is specified across a frequency range of 8.192 MHz ± 25%, allowing a maximum tracking rate of 1250 rps.

2. FEATURES

    1. Complete monolithic resolver-to-digital converter (RDC)

    2. Parallel and serial 12-bit data ports

    3. System fault detection

    4. ±11 arc minutes of accuracy

    5. Input signal range: 3.15 V p-p ± 27%

    6. Absolute position and velocity outputs

    7. 1250 rps maximum tracking rate, 12-bit resolution

    8. Incremental encoder emulation (1024 pulses/rev)

    9. Programmable sinusoidal oscillator on board

  10. Single-supply operation (5.00 V ± 5%)

  11. −40°C to +125°C temperature rating

  12. 44-lead LQFP

  13. 4 kV ESD protection

  14. Qualified for automotive applications

3. APPLICATIONS

    1. Automotive motion sensing and control

    2. Hybrid-electric vehicles

    3. Electric power steering

    4. Integrated starter generator/alternator

    5. Industrial motor control

    6. Process control