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TIDA-00683 demo board

Other Parts Discussed in Thread: AFE4404, ADS1292

How do I go about getting a demo board to test?

  • Marc,


    The board is not available for sale. We can provide all the design files including the gerber files and the BOM so that you can have one built.

    There's a note below the picture of the board in the reference design folder that says that "Fully assembled board (shown above) developed for testing and performance validation only, not available for sale."

    www.ti.com/.../tida-00683


    Joseph Wu
  • I know this.  Since, you have a picture, you obviously have made them.  I just want to borrow one for testing.  If it works, there would be considerable quantity and we would make them.  How do I go about testing?  As you say "Fully assembled board (shown above) developed for testing and performance validation only"  This is what I want to do.

    Marc

  • Hi Marc,

    Perhaps the way the note below the picture is worded can be somewhat misleading.  The testing and validation performance is done solely by TI for proving the concept and for the collection of data as shown in the reference guide for the design.  This allows for the design to be more than just a theoretical paper design.  Occasionally TI does make some of these designs available for purchase, but more often than not we only build the design for testing within TI.  We do not 'loan' out boards to be tested by customers.  As Joseph mentioned you can use the design files to build your own board.

    Best regards,

    Bob B

  • Hi Bob

    For me to move from our design to yours is going to require considerable effort. You have supplied the tools to make this as easy as possible. On the other hand clearly individual's PTT time will vary due to arterial stiffness and a bunch of other factors, so given the PTT, it has to be calibrated to the specific individual, presumably with an automated cuff, to give blood pressure. This is does not seem to discussed or taken into consideration with your design.

    What I would really like to know is whether this design has partially or wholly been incorporated into any actual products. For BP FDA approval is required. For FDA purposes, this may be the difference between a 510K or a PMA. Can you give me some background or help here? Was this done in a vacuum, or as a response to a product or product category?

    Thanks for any help that you can give.

    Marc
  • Hi Marc,

    This PTT solution was not intended to meet FDA requirements for blood pressure monitors. As we know PTT measurements involve simultaneous sampling of one's ECG and PPG, our goal was only to develop a solution that would synchronize the two measurements together. By synchronizing the ADS1292 and the AFE4404 to the same clock and configuring them for the same data rate, we were able to devise an algorithm that calculated the PTT based on the R-peak of the ECG and the max slope in the PPG.

    As you seem to know, PTT is one of several factors that must be considered when estimating a patient's blood pressure. We decided to leave it up to the medical experts to use this information in their own algorithms with proper calibration for each patient. From what I've read, many studies show the correlation between blood pressure and PTT, but the algorithms do vary, so we will not focus on that aspect of the solution.

    I hope this clarifies our intent with this design.

    Best Regards,

  • OK, I went to download the information and files on the reference design.  They were gone.  How do I get access again?  Marc

  • Hi Marc,

    It looks like the files were pulled offline as we wait to prepare for a more formal release and marketing campaign.

    That said, I still have the design files from what we've completed thus far. If you can give me your email address, I can share them with you.

    Regards,
  • Please - mmathys@gmail.com. Are you making changes? Is there another way to get some technical questions answered other than this forum?