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AFE44S30: AFE44S30- Data is abnormal

switch
Expert 2385 points
Part Number: AFE44S30
Other Parts Discussed in Thread: AFE44I30

Hi Team,

My Customer has a wearable project.The PPG data obtained by AFE44S30 is abnormal,Please help to analyze,Thanks！

PPG configuration file:

AFE44I30_Register_Generation_Master_V1p7_MM.XLSM

Wrong data:

EVT_Data_TX5_PD3_100Hz.xlsx

Schematic diagram:

  • +1
    TI__Mastermind 49176 points

    Hello Switch,

    We would like to take this discussion offline since the device AFE44S30 is shared under NDA.

    Can you please reach out to biosensing_afe-support@list.ti.com along with a reference to this E2E post?

    It seems like customer is using the wrong register configuration file. They are using AFE44I30 configuration file instead of AFE44S30.

    Please send the correct register configuration file and the abnormal data. Is the data saturated or noisy? If saturated, has the led current been adjusted?

    If noisy, was the FFT run on the data and spurious tones identified? Please share all the waveform analysis data as well.