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Standalone resolver-to-digital converter?

Jeffrey Ziegler
Prodigy 60 points
Other Parts Discussed in Thread: PGA411-Q1

Can one of TI's R-D converter products operate in a simple stand-alone mode?  The literature on PGA411-Q1, and the others I can find on the site, seem to imply that an elaborate microprocessor system is always involved.  We just have a need for an R-D converter in a straightforward velocity-control constant-speed chopper drive (4728rpm), with the R-D perhaps producing ABZ signals to commutate the drive to the BLDC kit motor, and a separate 12-bit parallel digital output to synchronize the rest of our measurement electronics to chopper rotational position.

  • 0
    TI__Mastermind 27950 points
    The appropriate Applications Engineer has been assigned to respond accordingly. Thank you for your patience.
  • 0
    TI__Mastermind 23810 points
    Jeffrey,

    The PGA411-Q1 only needs the microcontroller for initialization on the SPI bus. You need this to set your register settings, although many of the settings can then be programmed into EEPROM, which means that the device will start running without SPI intervention on power-up.

    This part can run the ABZ signals and the 12 bit parallel output at the same time. If you need to switch between velocity and angle output on the parallel pins, then the VA0 and VA1 pins will need to be controlled.

    Thanks,

    -Clancy