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Associate II
Nov 11, 2025 7:26 PM UTC
Solved

ST1VAFE3BX 50/60Hz notch filter?

In application note TN1571 "Reference design based on the ST1VAFE6AX and ST1VAFE3BX biosensors..." Table 2 mentions that ST1VAFE3BX has a selectable 50/60Hz notch filter. However, there's no further reference to this filter or how to enable it in the datasheet.

Is this an error in TN1571, or something I'm missing.

Thank you.

 

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Federica Bossi
Federica BossiBest answer
ST Technical Moderator
Nov 12, 2025 2:58 PM UTC

Hi @bwilkins ,

Yes, there is a typo. The embedded notch filter is available only in ST1VAFE6AX. For ST1VAFE3BX, if you need it, you can implement digital filtering in post process.

In order to give better visibility on the answered topics, please click on 'Best answer' on the reply which solved your issue or answered your question.

2 replies

Federica Bossi
Federica BossiBest answer
ST Technical Moderator
Nov 12, 2025 2:58 PM UTC

Hi @bwilkins ,

Yes, there is a typo. The embedded notch filter is available only in ST1VAFE6AX. For ST1VAFE3BX, if you need it, you can implement digital filtering in post process.

In order to give better visibility on the answered topics, please click on 'Best answer' on the reply which solved your issue or answered your question.
bwilkinsAuthor
Associate II
Nov 12, 2025 8:09 PM UTC

Thank you for confirming.