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Protocentral / protocentral_max30003

Breakout board for the Maxim MAX3003 single-channel ECG AFE
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Design #7

Closed amir1994a closed 7 years ago

amir1994a commented 7 years ago

In page 44 of the datasheet of max30003, in the recommended circuit it has used 1k resistor while you have used 49.9k resistor? is this because of a particular reason? what will happen if you use a 1k resistor instead of 49.9k?

VenkateshBhat commented 7 years ago

@amir1994a , the diagram mentioned in the datasheet is a typical application circuit not the recommended values. The RC filter here acts as an anti-aliasing filter .Reference diagram is here https://www.maximintegrated.com/en/design/tools/appnotes/6312/MAXREFDES100_SCH_RA.pdf

amir1994a commented 7 years ago

thank you, what about the zero value resistor?is it going to be a problem if we don't use them?

VenkateshBhat commented 7 years ago

No, it does not affect the performance.

Tomisdebom commented 3 years ago

@amir1994a , the diagram mentioned in the datasheet is a typical application circuit not the recommended values. The RC filter here acts as an anti-aliasing filter .Reference diagram is here https://www.maximintegrated.com/en/design/tools/appnotes/6312/MAXREFDES100_SCH_RA.pdf

Wait, the reference design you just posted is different than the schematics that are in the Github repo. Are you sure your reference design corresponds to the Protocentral board?