• AD2S90: FAQs

    Does angular accuracy depend on the value of the input frequency and what
    angular accuracy degradation results over ambient temperature variations? 

     

    The angular accuracy is specified for a Reference input frequency from 3 to
    20Khz and degradation…

  • AD2S90 +AD2S99

    Hello.

    Is it possible to use one generator AD2S99 with buffer and four AD2S90 IC's?

    What to do with pins of AD2S99 SIN COS SYNREF? 

    Maybe there are some detailed shematics like in figure 16 of datasheet AD2S90 http://www.analog.com/media/en/technical…

  • AD2S90 SPI data freezing

    Hi, 

    I have a system of 12x AD2S90 wired in a common SPI bus. Sometimes, one or more of the AD2S90 freeze and report constant resolver angle on the SPI bus. I haven't been able to trigger the anomaly and will. This happens whenever a physical resolver…

  • Amplitude accuracy of AD2S99 vs Input signal amplitude of AD2S90

    We would use AD2S90 for the acquisition of a resolver sensor and AD2S99 for the
    excitation. But the amplitude variations of the excitation in the range of the
    temperature of the AD2S99 is 2V 10% . It Is the same tolerance as SIN and COS
    input…

  • solution for 3 phase synchro selsyn similar to AD2S90

    Good afternoon,

    are there any ready solutions for 3 phase synchro selsyn similar to AD2S90

    kind regards,

    Jevgeni Lototski

  • AD2S90 RDC: Unstable output on A,B encoder output pins

    Hi Everyone.

    I'm currently experimenting with an AD2S90 for resolver-digital-conversion, to provide position feedback for a motor controller. However, the A, B encoder emulation outputs are unstable and keep changing, even when the motor is not moving…

  • AD2S90 RDC SPI data output with angle changed 180 deg to 0 deg

    Hello,

    AD2S90 RDC SPI data output was not changing when the reference, sine and cosine phase angles changed from 180 deg to 0 deg. Please check the screenshots below.

    1. When reference, sine and cosine phase angles are at 0 degree, SPI data output as…

  • AD2S90: Can I use the unmodulated outputs for perpendicular HALL sensors instead of a resolver?

    Can the AD2S90 use the unmodulated outputs for perpendicular HALL sensors
    instead of a resolver?

     

    The limit for the carrier frequency is 3kHz to 20kHz. It won't work with a DC
    carrier.
    (The AD2S90 datasheet explains the demodulation mathematically…

  • AD2S83: Incremental output with low frequency excitation

    we used AD2S83 before, now he hope our AD2Sxx have incremental encoder output,
    so he select AD2S90. But the frequency of his resolver's output signal is only
    50 Hz. And AD2S90's input signal's frequency is 3 KHz minimum. So it seems …