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Can I acquire amplified analog signal from ADS1298ECG-PDK

Gang Xu
Prodigy 50 points
Other Parts Discussed in Thread: ADS1298

I need to detect QRS complex of ECG signal in real-time so I can do further analysis. My first thought is extracting amplified analog signal from ADS1298ECG-PDK, and digitalize the signal using a NI DAQ USB device.

Please tell if there are some pins on the evaluation board I can connect to output a analog signal?

If not, can I try some other ways to measure ECG signal in real time?

1. maybe I can customize the source code of the ADS1298ECG-PDK, which is programmed by LabVIEW.

2. or buy a NI SPI communication board USB-8451 to talk with ADS1298ECG-PDK.

are these solutions all posible? 

I'll be appreciate if someone give me advice. Thanks.

Gang

  • 0
    TI__Guru 57336 points

    Hello Gang,

    Thanks for your interest in the ADS1298. The source code of the ADS1298ECG-PDK can be modified, but our team cannot support any changes that you make to it.

    An alternative suggestion would be to use the PACE_OUTx pins of the device. The ADS1298 allows for two channels (one EVEN channel and one ODD channel) to be buffered and output after the PGA gain stage. There is a fixed attenuation of 0.4x in the PACE amplifiers. The differential output from the PGA is converted to a single-ended signal with a mid-supply common-mode. Please refer to Figure 71 of the datasheet to see how the internal PACE amplifiers are configured.

    These internal amplifiers have a limited drive strength, as described in the Electrical Characteristics table, so make sure that the NI DAQ inputs are high impedance.

    Best Regards,

  • 0 in reply to Ryan Andrews
    Prodigy 50 points

    Hi, Ryan

    I appreciate your reply for my question. Your response is very useful to me and it explains my doubts. Thanks.

    Best Regards,

    Gang