• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Subscribers 32 subscribers
  • Views 1255 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

purpose of TDC7200

Khai Lee
Prodigy 180 points
Other Parts Discussed in Thread: TDC7200

Hi,

What is the purpose of TDC7200.

I think MCU can be enough to calculate flight duration time.

even if I use TDC7200, it seems that I need another MCU followed by TDC7200.

  • 0
    TI__Intellectual 1635 points
    Hi Khai,
    It depends on your application. If your application requires nano-second accuracy, then the MCU is good enough. However, if your application requires pico-second acuracy, like in the case for flow meter applications, then we recommend using the TDC7200, whose accuracy is in the ~50 pico-secod range that most MCU cannot achieve. I hope that helps.
  • 0 in reply to AmyLe
    Prodigy 10 points
    Hi,

    What if I need to measure ultralow flow rate whose delta TOF in femto-second range? Can I use higher rate clock to achieve measurement?

    Dave
  • 0 in reply to Dave Pooh
    TI__Mastermind 21685 points
    Hello Dave,

    TDC7200 Mode 2 measurement range minimum is 2 clock cycles. Maximum input clock freq for TDC7200 is 16MHz. That calculates to 125ns.
    In Mode 1 TDC7200 measurement range minimum is 12ns.
    Please refer to TDC7200 Data Sheet page 5.

    Thanks,
    Vishy