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Driver circuit for ultrasonic receiver

Luigi Truppa
Intellectual 385 points
Other Parts Discussed in Thread: DRV2700EVM, TDC1000, PGA460, ENERGIA, PGA460-Q1, BOOSTXL-PGA460

Hi,
i have some questions about the piezo transducers.
I have to use two piezo sensors (one as transmitter and the other one as a receiver) and i need a receiver circuit.
I have to use some piezos at different frequencies (from 40kHz to 1MHz) and i know that already exists a driver for the transmission of the ultrasonic wave (DRV2700EVM); the question is, does it exist a similar EVM for the receiver transducer which i can connect to arduino (for example)?
Thank you for your precious time!
Luigi

  • 0
    TI__Mastermind 31655 points
    Hi Luigi,

    Ultrasonic transducers are resonant devices, and will not effectively send or receive signals outside of a very narrow bandwidth. A 40kHz transducer can not be used to receive a 1Mhz signal (or vice versa).

    If the receiver and transmitter are completely unrelated in this application, and the receiver is taking in a signal of the correct frequency from some other source, then there are a couple of options. For a 40kHz receiver, you could use either the TDC1000 or the PGA460 as an analog front end. If the receiver is at 1Mhz, I would suggest just the TDC1000 as an analog front end.

    Regards,
  • 0
    TI__Mastermind 27780 points
    Hi Luigi,

    The PGA460 Energia Library and Code Example ( www.ti.com/.../slac741 ) is compatible with the Arduino hardware and IDE.
    To see what is offered in this software package, refer to the associated documentation PGA460 Software Development Guide ( www.ti.com/.../slaa730 ).

    For transducers operating between 30k-80kHz and 180k-480kHz, the PGA460 will work. Thus, for your 40kHz transducer, you can order the PGA460-Q1 EVM kit ( www.ti.com/.../boostxl-pga460 ) , and use the included BOOSTXL-PGA460 BoosterPack (Arduino shield equivalent) to jumper-wire to your Arduino master. I recommend that you order the complete EVM to evaluate the PGA460 using the PGA460 EVM GUI ( www.ti.com/.../slac739 ), which will help you understand the device's features. View the "Ultrasonic Sensing with the PGA460-Q1" video series ( training.ti.com/ultrasonic-sensing-pga460-q1 ) to visually see a demo of the PGA460 device in action.
  • 0 in reply to Akeem Whitehead
    TI__Mastermind 31655 points
    Hi Luigi,

    Hopefully these responses answered your question. I will close the thread for now, but if you need more assistance just reply again and it will reopen automatically.

    Regards,