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ADS1298 Readouts

Other Parts Discussed in Thread: ADS1298

Hi,

I want to use the ADS1298 for a project. I am currently conducting preliminary tests to characterise the noise on its input channels.

When I leave all inputs floating, I expect to record noise levels which I do obtain on all channels except for CH5 where I record a consistent 2.4V (same as the internal reference?) and CH8 where I readout 1.44V. When these two channels are connected to an input voltage the recordings are accurate, but I am trying to understand the voltages I obtain when they are left floating.

My register configurations are as follows:

Config1: 0xE6

Config2: 0x00

Config3: 0xC0

CHnSET: 0x10 (on all channels I want normal electrode with a gain of 1)

Thanks,

Hind