• State
  • Locked Locked
  • Replies 4 replies
  • Subscribers 47 subscribers
  • Views 897 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.

ADS5560: Single ended input

Jingtai
Genius 4575 points

Part Number: ADS5560
Other Parts Discussed in Thread: THS4509

Concerning the single ended input Richard has replied me. The further question:

You mentioned the solution with a transformer, how about this AD9266 solution? Which is better?

  • 0
    TI__Mastermind 29220 points

    Hi,

    That circuit does not convert a single ended input into a fully symmetrical differential signal.  That circuit simply presents the single ended signal to one side while biasing the other side of the input to mid-scale.    The voltage at the VIN- input will be a DC signal and not be a signal of opposite polarity to the signal at the VIN+ input.  The ADS5560 requires a fully differential signal present at the VIN+ and VIN- inputs.

    Regards,

    Richard P.

  • 0 in reply to Richard Prentice
    Genius 4575 points

    Thanks for your explanation. Our input signal is excited with 10 MHz sine wave and it is required signal and other frequencies will be filtered as noise. Can you give me a single ended input to ADS5560 solution?  

  • 0 in reply to Jingtai
    TI__Mastermind 29220 points

    Hi,

    the EVM for the ADS5560 has a transformer coupled input using a Coilcraft transformer that has a bandwidth to cover well down below 1MHz or up over 100MHz.  I would take a look at that.  The schematic for the EVM is presented in the back of the User Guide for the EVM that is on the TI web, as well as a zip file of the board design files on the TI web page for the ADS5560 EVM.    The EVM also has a solder option for a THS4509 amplifier in the input path, with component pads after the amp for a low pass or bandpass filter design.

    Regards,

    Richard P.

  • 0 in reply to Richard Prentice
    Genius 4575 points

    Thanks for your support. Another issue is that I try to use existed Launchxl-F28377 processing digital signals from ADS5560. I have to check and consult Microcontroller section.