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  • RE: AFE4404: AFE4404 EVM Calibration Routine

    Resolved
    Hello Kim, I'm not sure if I follow what you mean, could you clarify as to what the "variable" is? To reiterate, the calibration routine is limited in it's function, capability and compatibility. It is not intended as a go-to-market solution…

  • AFE4404: What do you mean by Clinical fingerprintip pulse oximetry?

    TI Thinks Resolved
    Part Number: AFE4404 Other Parts Discussed in Thread: AFE4432 Hi. I am doing PPG test using AFE4404. I was watching Chip Applications, and I got a question, so I'm asking. Check out the AFE4404 chip applications. Clinical fingertip pulse oximetry…

  • AFE4404: AFE4404 PPG Ambient Data

    TI Thinks Resolved
    Part Number: AFE4404 Hi. I'm measuring PPG on my wrist with AFE4404. I look at the datasheet, 2A to 2C is LED1VAL, LED3VAL, LED2VAL. But if you look at 2D to 2F, you get the value of ambient. What is ambient? I can get the value by lighting the LED…
    • Answered

  • AFE4404: Configure 1Khz sampling

    Resolved
    Part Number: AFE4404 Hi Team, Can you please help in configuring this device to 1khz sampling? The customer is using a custom board connected to Arduino Uno and they have tried the solution in this thread but the LED values retrieved were always zero. I…
    • Resolved
    • Answered

  • RE: AFE4404: AFE4404 Automatic Gain Control(AGC) algorithm

    Resolved
    Hi Kim, AGC is a type of circuit relies on an analog, variable signal as a feedback input to dynamically change it's out. The AFE4404 does not have an AGC circuit. The Calibration_AFE4404.c will, through software, set configuration registers within the…

  • AFE4404: AFE4404

    TI Thinks Resolved
    Part Number: AFE4404 Dear Sir or Madam We are having an issue regarding your AFE4404. We have a device collecting PPG samples from 3 channels - green (channel 1), red (channel 2) and infrared (channel 3). We have collected thousands of PPG signals and…

  • AFE4404: Calibration_AFE4404.c BLOCK_SIZE & BLOCK_SIZE_BITS value

    TI Thinks Resolved
    Part Number: AFE4404 Hi. I was looking at the Calibration_AFE4404.c code and I had a question. In Calibration_AFE4404.c, it is declared BLOCK_SIZE = 8, BLOCK_SIZE_BITS = 3. Is there any problem if I change it to BLOCK_SIZE = 16, BLOCK_SIZE_BITS = 4? …

  • RE: AFE4404: PPG signal interference

    Hi Kim, I've sent answers for your original post over email. Since the problem has been solved, I'll be closing this thread . If you need any additional support, please follow up with me on that email thread. Kind regards, Nick Z

  • AFE4404: PPG signal reversal

    TI Thinks Resolved
    Part Number: AFE4404 Hi. I am developing PPG measurement with AFE4404 and nRF52832. I'm getting PPG data from my wrist, and I have a question. The picture below is my data, and from the top, it's Green, IR, and Red PPG But most PPG look like…

  • RE: AFE4404: AFE4404

    Hi Camilo, Since I did not hear back from you for quite some time, I assume that your issue has been solved. Note that I'll go ahead and close this thread. Replying to the thread will re-open it if necessary at some point.

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