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ADS1299EEG FE

shiping wang
Prodigy 180 points
Other Parts Discussed in Thread: ADS1299, ADS1298, ADS1299EEGFE-PDK

Hello,

1. Just wondering if i can only buy ADS1299EEG FE without MMB0 board to do the test?

2. Also, since i am using ADS1299 to convert ECG signal, the BIAS seems to be a quite important part, but i can't find much information about it on ADS1299 manual, Can someone give me some reference to read? i even don't know the function of BIAS buffer also BIAS reference signal?  

3. It will be the best if you tell me where to connect the positive/negative/reference directly (eg. with LL, LA, RA)?

Thanks a lot,

shiping

  • 0
    TI__Mastermind 38745 points

    Hello Shiping,

    1. Unfortunately no. You must purchase the entire kit.
    2. The "BIAS" amplifier on the ADS1299 serves the same purpose as a Right-Leg Drive amplifier in an ECG system. There is a little about the use case in the ADS1299 datasheet in the "Typical Application" section starting on page 65. Otherwise, the functional description of the amplifier is in the datasheet on page 33.
    3. The ADS1299 is very similar to the ADS1298. If you are looking for a good reference, take a look at the ADS1298ECGFE-PDK User's Guide for the schematic near the end of the document. It shows how the ADS1298 might be implemented into an ECG front end. Using the ADS1299 would look very similar - the devices even have a similar pinout.

    Regards,

    Brian Pisani 

  • 0 in reply to Brian Pisani
    Prodigy 30 points
    Hello Brian,
    I'm using ADS1299EEG FE to gather and process signal . I'v downloaded ADS1299EEGFEFW-C5509(Firmware Source for ADS1299EEG Front End Performance Demonstration Kit ). Now there are some questions you need to answer.
    1. If the program is modified and written in ADS1299EEG-FE, can I use the ADS1299EEGFEFW-C5509(no change) recovery the ADS1299EEG-FE?
    2. In main.c ,what the mmb0_mkdir(srv,0L) and usbstyx_main() specific function?
  • 0 in reply to guitong liu
    TI__Mastermind 38745 points

    Hello guitong,

    First let me begin by saying that we provide the source code for the ADS1299EEGFE-PDK as a courtesy to users, but I would not recommend using it as source code. There is a lot of rather complex behavior that is irrelevant to the use of the ADS1299 as a medical AFE, but related instead to communication with the LabVIEW based PC software. Generally, TI supports the use of the ADS1299EEGFE-PDK as an evaluation module for the performance and functionality of the ADS1299 device, but not as a development kit for secondary uses.

    1. You may run into compiler compatibility issues. When this code was originally developed, it was developed using an older version of CCS with an older CCS C compiler. Folks have complained in the past that they could not get the code to compile immediately.
    2. Unfortunately we do not support the code like it were source code. What I can say is that the firmware uses a server-client architecture called "styx" to communicate with the LabVIEW based PC software. Again, this is not specific to the ADS1299 and is unrelated to the functionality of the medical front-end - it is only software logistics.

    Regards,

    Brian Pisani