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AFE4404: Power consumption at different settings

Natalie Ownby
Prodigy 10 points
Part Number: AFE4404

I am working with the AFE4404 and the PPG sensor. We would like to know the power consumption of the AFE and sensor at the different gain and LED current settings. Is there a way to calculate or measure that? We are trying to look at the tradeoff between power consumption and SNR for different settings.

  • 0
    TI__Mastermind 49176 points

    Hello Natalie,

    You may refer to Figure 2 for the RX current vs PRF. This current is not going to change much for the different gains.

    The TX supply current drawn by the AFE is listed in the electrical spec table. The additional average current drawn on the TX_SUP would be the LED currents duty cycled since the LEDs are turned on only for the LED on time.