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AFE5801: provision for disabling the channels

Shilpa B K
Prodigy 50 points
Part Number: AFE5801

Hi,

   In AFE5801, Is there any provision to use only one channel and disable other channels to avoid the current consumption?

Thank You,

 Shilpa

  • 0
    TI__Expert 4750 points

    Hi Shilpa, 

    Yes. Use PDN_CHANNEL<7:0> and PDN_LVDS<7:0> to disable the required channels and save power. 

    Thanks, 

    Karthik

  • 0
    Prodigy 50 points

    HOW MUCH POWER WE CAN SAVE?

  • 0 in reply to Shilpa B K
    TI__Expert 4750 points

    Hi Shilpa, 

    You can use the below table from the datasheet for an approximate estimate. 

    Eq (1): Total power (power up) = Per-channel-power (power-up) * 8+ Common-power (power-up) = 522 mW

    Eq (2): Total power (power down) = Per-channel-power (power-down)  * 8  + Common-power (power-down) = 8 mW

    Eq (3): Assume Common-power is negligible

    Then, Total power (1-ch power up + 7-ch power-down) = Per-channel-power (power-up) + Per-channel-power (power-down)  * 7  = 73 mW

    With some margin, you can assume 75-100 mW for 1-ch power up mode. For more accurate estimation, I recommend to procure AFE5801EVM and conduct these measurements. 

    Thanks, 

    Karthik