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ADS1298: ECG input protection diodes

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Replies: 3

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Part Number: ADS1298

Hello,

Does anybody know what type of input protection diodes should be used in real-life ECG application? (picture from ADS1298RECGFE-PDK below as a reference)

I have tried with Schottky diodes, but I noticed some problems with lead-off detection. Not connected electrodes were detected as connected, probably because significant leakage current. So I guess that Schottky is not the best choice. What type of diodes should be used to have enough protection, but no problem with leakage current?

Thanks & regards
Maciej

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