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AFE4900 : How can I control the ambient Rf gain value when I use the 4 phase only PPG mode

EUNJI LEE
Prodigy 50 points
Part Number: AFE4900

HELLO .

I have one problem using TI product( afe4900) I get the 4phase ppg signal from afe 4900. LED1:GREEN, LED2: RED. LED3: IR, LED4: ambient so, I want to operate 4phase Rf gain and Cf independently.

but, ambient Rf gain of ambient phase can't using independently. I set up a register to set the ambient gain independently.

However, the DC value of ambient is not affected by the value of ambient RF at all and is affected by the RF value of the GREEN LED.

Please tell me how I can adjust the Ambient's DC value by setting the Ambient Rf value independently.

Thank you

  • 0
    TI__Mastermind 49916 points

    Hello Eunji,

    We would like to take this discussion offline since the device AFE4900 is under selective disclosure.

    Can you send your questions to biosensing_afe-support@list.ti.com along with a reference to this E2E post?

    Please share your register configuration settings

    Also note that due to US Thanksgiving holidays, our responses will be delayed.

    We will provide a response to your queries in the order in which it was received.

    Thanks for your patience and understanding.