Forum Post: RE: ads1282 internal high-pass filter

Hi, Chris,

Thanks a lot for your replying.

Well, the outside test conditions between the two settings (SINC+LPF and SINC+LPF+HPF) are the same.

the inputs are shorted to ground with internal 400ohm resisters.

SINC+LPF settings:

CONFIG0: 8'b01010010

CONFIG1:8'b00101000

HPF: default value

SINC+LPF+HPF settings:

CONFIG0: 8'b01010011

CONFIG1:8'b00101000

HPF: 8'h19B

As you said, the noise performance we got was 1.2uVrms@1ksps with the outside interferences, however, i think whatever the value is, when i enable HPF, the noise performace should be better, no matter 1.2uVpp or 1.2uVrms.

The detailed settings are as above, do i miss something?

Thanks

ingdxdy