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Showing 403 results View by: Thread Post Sort by
  • AFE4404: Minimum LEDs duty cycle and time to sampling

    Michael Pasternak
    Michael Pasternak
    TI Thinks Resolved
    Part Number: AFE4404 Tool/software: Dear Sirs. I use AFE4404 in low power device. I need to reduce power consumption of LEDs. Pulse repetition factor is 10ms Today I switch LED on for 230us and wait 70us between switching the LED On and starting…
    • over 1 year ago
    • Data converters
    • Data converters forum
  • Answered
  • AFE4404: reads data from multiple registers sequentially

    Te_Chen Shen
    Te_Chen Shen
    Resolved
    Part Number: AFE4404 Tool/software: Hi, I am trying to reads data from multiple registers (from 2Ah to 2Fh) sequentially. I used nrf52840 to read, and I used i2c_burst_read_dt() function which can read multiple bytes from an internal address of an…
    • Resolved
    • over 1 year ago
    • Data converters
    • Data converters forum
  • AFE4404: AFE4404 Hz Change Routine

    kim minseo
    kim minseo
    Part Number: AFE4404 Hi. I was changing Hz using AFE4404 EVM. I want to freely change the Hz in code just like when I put the desired Hz into Pulse Repetition in AFE4404 EVM, the 0x00 to 0x1E register value changes. So I'm curious about the formula…
    • over 3 years ago
    • Data converters
    • Data converters forum
  • AFE4404: the measurement of SpO2

    ?? ??
    ?? ??
    Part Number: AFE4404 Tool/software: We use AFE4404 sensors in our smartwatches, and have two questions. First, Is the algorithm AFE4404 sensors estimating SpO2 based on the paper "Source–Detector Spectral Pairing-Related Inaccuracies in Pulse Oximetry…
    • over 2 years ago
    • Data converters
    • Data converters forum
  • AFE4404: AFE4404 Rf, Cf Features

    kim minseo
    kim minseo
    Part Number: AFE4404 Hi. I have a question while I was picking ppg with afe4404. I understand OFFDAC, Gain. But I don't know the function of the CF. Thank you.
    • over 3 years ago
    • Data converters
    • Data converters forum
  • AFE4404: AFE4404 Calibration code initCalibrationRoutine()

    kim minseo
    kim minseo
    Part Number: AFE4404 Hi. I was looking at the code Calibration_AFE4404.c initCalibrationRoutine() and left a question. Can you tell me why the formula below came out? Why do you save it in four variables using hysteresis percent: LOW_THR_HYS_LOW…
    • over 3 years ago
    • Data converters
    • Data converters forum
  • AFE4404: AFE4404

    Tianyue Li
    Tianyue Li
    Part Number: AFE4404 Hello, I am trying to increase AFE4404 data reporting frequency to around 60 HZ using the following public arduino code. https://github.com/rakshithbk/AFE4404-Library/blob/master/AFE_Connect/AFE_connect.cpp But however I tried…
    • over 3 years ago
    • Data converters
    • Data converters forum
  • AFE4404: Overlapping LED on time

    David Tobler
    David Tobler
    TI Thinks Resolved
    Part Number: AFE4404 I have a special test mode that is need. It requires that all three LEDs be on at the same time for most all of the Repetition Interval. The "normal" operational settings are for 100Hz at 1% duty cycle, with typical sequential sampling…
    • over 2 years ago
    • Data converters
    • Data converters forum
  • AFE4404: AFE4404 PPG data guideline

    kim minseo
    kim minseo
    TI Thinks Resolved
    Part Number: AFE4404 Hi. I am extracting PPG data using AFE4404. I want to get pulse, spo2, and blood pressure with PPG data, is there a guideline or code provided by TI? Thank you.
    • over 3 years ago
    • Data converters
    • Data converters forum
  • AFE4404: Question about AFE4404

    Chase Jeong
    Chase Jeong
    TI Thinks Resolved
    Part Number: AFE4404 Hello TI experts, My customer considers AFE4404 for their new product, wearable smart wrist band. and they want to know the answers about 2 questions below. 1. they will use photo sensor which is same as AFE4404 EVM. (NJL5513R…
    • over 3 years ago
    • Data converters
    • Data converters forum
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