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ADS1294R: ADS1294R TP PACE OUT2

Part Number: ADS1294R

Hello,

I am using the TP_PACE_OUT1 pin for pacemaker detection and I don't use the TP_PACE_OUT2.

According to the datasheet and application note, I have to connect the TP_PACE_OUT2 to 3V3. I don't understand because it is an output.

Can you tell me why we need to connect it to 3V3 and what happens if it is not connected?

Thank you

Regards,

Damien