FDC2214EVM: power mode

Janine Lin

Expert 2190 points

Part Number: FDC2214EVM

Dear Kristin and Clancy

In our design we will use 3 channels,

1st channel for proximity sensing, and the 2 channels are for touch button.

1st channel will be connected to CH0 , the 2 channels will be connected to CH1 & CH2.

In the GUI, do i need to enable the "High Current Sensor Drive"?

Thank you.

over 6 years ago

0 Kristin Jones93 over 6 years ago

TI__Genius 17440 points

Hello Janine,

You do not need to enable High Current Sensor drive unless your sensor oscillation amplitude is too low using the normal current drive. The sensor oscillation amplitude at INxA/INxB should be between 1.2-1.8V. This application note should help you verify if your sensor drive current is set up correctly. It is for some LDC devices that use a similar LC tank sensor architecture, so the drive current can be set the same way.

Application note: www.ti.com/.../snoa950.pdf

Best Regards,

0 Janine Lin over 6 years ago in reply to Kristin Jones93

Expert 2190 points

Thank you Kristin.

0 Janine Lin over 6 years ago in reply to Kristin Jones93

Expert 2190 points

Thank you Kristin.

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FDC2214EVM: power mode