Because of the holidays, TI E2E™ design support forum responses will be delayed from Dec. 25 through Jan. 2. Thank you for your patience.

  • State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 15 subscribers
  • Views 379 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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.

ISO7720: isolation device for analog signals input

Henry Wang3
Expert 2915 points
Part Number: ISO7720

Hi Sir,

My customer is looking a 2-ch isolation device for analog signals input(single-end) for AHD/TVI signals, the BW is 30MHz.

May I know if ISO7720 can be used?

If it can't, could you please advise a device to me?

  • 0
    TI__Mastermind 22135 points

    Hello Henry,

    Thank you for your question. The ISO7720 is a digital isolator. From what I can see the AHD/TVI standard uses an analog signal which the ISO7720 does not support. 

    However, TI has isolated analog solutions that may be more applicable to your application. I will notify the relevant product line.

    Best, 

    Andrew

  • +1 in reply to Andrew J
    TI__Guru 51051 points

    Hi Henry,

    Like Andrew said, we do have analog to analog isolated amplifiers: and analog to digital isolated ADCs; however none of these devices are capable of measuring signals at 30MHz.

    To measure an isolated 30MHz signal, I recommend selecting a high speed ADC to measure the signal on the high side of the isolated barrier, then transfer across the isolation barrier using a digital isolator. Keep in mind that a voltage rail to power the high side ADC and digital isolator will be necessary.

    If the two signals you are measuring require isolation from each other, then you will need two high speed ADCs and digital isolators. 

    Please let me know if you have additional questions.