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Product recommendation for generation of waveforms to control a pair of scanning mirrors

Prodigy 120 points

Replies: 6

Views: 487

Hello,

I have a pair of scanning galvanometer mirrors in a laser-imaging system that are controlled by periodic waveforms generated from an NI-DAQ. I need more flexibility in the generated waveform though. Ideally, I need to be able to perform waveform updates on a sample-by-sample basis as opposed to multiple periods/samples at once. I was thinking maybe generate the waveform on a microcontroller and have it drive a DAC, but the challenge is that the sample clock, provided externally, runs at 400 kHz, which means that at 8 bits/sample and 2 output channels, the minimum data rate is ~ 6.4 Mbps. Is there a TI product (EVM or something similar) that I could use to achieve this? Also, the voltage range is -/+ 10V and ideally I'd like to be able to connect to it using SMA or BNC cables. 

Thanks,

Mohamed

  • Hi Mohamed,
    Thanks for your question, I will forward it to some engineers who work with different ADCs/EVMs.
    Best Regards,
    Clay
  • In reply to Clay Uhing:

    Hi Mohamed

    Would the TIPD192 (1ch) , DAC8803EVM/DAC8814EVM (4ch) or similar boards provide what you need?

    These are higher resolution but otherwise meet most of the requirements you have listed.

    I hope this is helpful.

    Best regards,

    Jim B

  • In reply to Jim Brinkhurst84999:

    Hi Jim,

    Thank you for your reply and recommendations. Is there a "more complete" product? As in, an EVM that has both a microcontroller/microprocessor along with a 2+ channel DAC?

    To be able to use either of these, I'd need to buy a separate MCU board, setup the SPI links, and have some RTOS running on the MCU. Does TI carry any EVM that has this setup out of the box? I know this might probably sound lazy :-), but it's just a small part of a bigger project and I'm trying to find the most efficient route to do this.
  • In reply to Mohamed El Haddad:

    Hi Mohamed
    I'm not aware of any single board solutions from TI that have everything you need.
    One potential combination would be the following:
    DAC8803EVM
    5-6KINTERFACE
    TMDSDSK5416 TMS320C5416 DSP Starter Kit (DSK)
    Best regards,
    Jim B
  • In reply to Jim Brinkhurst84999:

    Thanks Jim. I will try this DAC with an MCU that I have then.
  • In reply to Mohamed El Haddad:

    Just an update, in case someone runs into this thread: I bought the DAC8803 EVM and was able to connect it over spi with a STM32F407 (STM32F4 discovery board), and it ran without problems.

    Thanks for the recommendation, Jim. 

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