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  • AFE4400: Unable to drive the photodiode normally, unable to read blood oxygen normally

    Part Number: AFE4400 Tool/software: It automatically diagnoses error 0x1030, I cannot understand why the photodiode is short circuited and open circuited again, and bit12 indicates PD_ALM: Power-down alarm status diagnostic flag This bit indicates…
    • Answered

  • AFE4400: Unable to drive the photodiode normally, unable to read blood oxygen normally

    Resolved
    Part Number: AFE4400 Tool/software: It automatically diagnoses error 0x1030, I cannot understand why the photodiode is short circuited and open circuited again, and bit12 indicates PD_ALM: Power-down alarm status diagnostic flag This bit indicates the…
    • Resolved

  • AFE4400: AFE4400 Design consultation

    Part Number: AFE4400 Hello， Question 1: Is there a detailed description of more than ten Count registers related to Timer in AFE4400 register? If yes, please help provide it; Question 2: Is there a reference algorithm for calculating blood oxygen…
    • Answered

  • AFE4400: Connecting Single-Ended Photodiode to Differential INM, INP Pins

    Resolved
    Part Number: AFE4400 Tool/software: If the photodiode is in a single-ended input configuration, how should it be connected to the INM and INP pins? Is the connection method for the photodiode as shown in the picture below possible? Thank you.
    • Resolved

  • AFE4490: Relationship between INN INM and TXP TXN for AFE4400 and AFE4490

    Part Number: AFE4490 Tool/software: First Here is datasheet to use this case. www.ti.com/.../afe4490.pdf What I want to do: I want to set the AFE4490 datasheet Figure 116. LEDCNTRL: LED Control Register (Address = 22h, Reset Value = 0000h) and control…

  • RE: AFE4400: The schemetic and gerber file for MHR041 PPG Sensor Board

    Hello Junil, Please excuse our delay. I will reach out to you directly via email and share the MHR041 board files with you. Regards, Ryan

  • AFE4400: Question about measuring SpO2

    TI Thinks Resolved
    Part Number: AFE4400 Other Parts Discussed in Thread: AFE4490 , AFE4403 , AFE4432 , AFE4460 Dear TI experts, My customer considers IC to measure SpO2, and have few questions about it. Could you check the questions below? 1. Is there any IC which can…

  • AFE4400: Please review the schematic

    TI Thinks Resolved
    Part Number: AFE4400 Dear TI experts, My customer drew their first schematic with AFE4400. Could you review it? And please check the questions below ; 1. They want to light green LED and photodiode on at the same time. Please guide me about software…
    • Answered

  • AFE4400: DB9 spO2 AFE part selection

    Resolved
    Part Number: AFE4400 Other Parts Discussed in Thread: AFE4404 Hello, I am designing a product with an SPO2 and MHR sensor. I will control it with an ESP32 through I2C/SPI (I am lacking GPIOs). I will use a DB9 8000J sensor ( https://www.nonin.com…
    • Resolved

  • AFE4400: how to reduce the interference of EFT about afe4400

    TI Thinks Resolved
    Part Number: AFE4400 At present, the problem we are encountering is that when EFT exists, there will be many glitches in the blood oxygen waveform. Put a magnetic ring on the blood oxygen probe, the quality of the waveform will be better, but…

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