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Comment by genxy

4 hours ago

tl;dr it uses

Texas Instruments ADS1299 (24-bit, 8-channel) analog-digital converter

There is no way to do what that chip does for less, maybe 7$ less but then not as good. They have priced it perfectly and I hate them for it.

https://www.digikey.com/en/products/detail/texas-instruments...

2 comments

genxy

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CamperBob2  2 hours ago

Part of what you're paying for with the ADS1299 is simultaneous sampling, which you can get by without. You could use a single-channel 24-bit ADC and multiplex it yourself with generic analog switch ICs. That gives you a much larger array of part-selection options.

Or try the newer ADS122S14.