ONET4201PA: Offset cancellation filter capacitance calculation

Joe_B

Part Number: ONET4201PA

How do you calculate the capacitance required for the optional external filter capacitor (coc)? I only see 2 values given (1) coc open = 25kHz and (2) coc 0.54uF = 0.8kHz.

over 1 year ago

+1 Nasser Mohammadi over 1 year ago

TI__Guru* 93670 points

Hi Joe,

Please use the following equation for the 3-dB cut off frequency:

3dB cut off frequency = 1/(2*3.14*368*C).

For example with 0.54uF Cap, you would get .8KHz 3dB high pass cut off.

Regards,Nasser

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ONET4201PA: Offset cancellation filter capacitance calculation