LTC1856 configuring and reading back differential channels

Thanks for the quick response. I've taken care of the conversion result being shifted out next.

It's the differential of + and - 10V I'm more concerned about. On my initial reading of the datasheet I thought the device could handle a differential input voltage of 20V, +10V on CH6 and -10V on CH7, and report it back as +10V read from CH6 and -10V read from CH7. But on further inspection it states on page 13 of the datasheet

"The SAR contents (a 12-/14-/16-bit

data word) which represents the difference of ADC+ and

ADC– are loaded into the 12-/14-/16-bit shift register."

so it looks like the maximum reportable differential voltage is + and - 5V?  Everything greater than this is +full-scale on CH6 and -full-scale on CH7

I could configure channels 6 and 7 as single ended referenced to COM which will give me +10 on CH6 and -10V on CH7 but won't remove the common mode noise.

Thanks for the quick response. I've taken care of the conversion result being shifted out next.

It's the differential of + and - 10V I'm more concerned about. On my initial reading of the datasheet I thought the device could handle a differential input voltage of 20V, +10V on CH6 and -10V on CH7, and report it back as +10V read from CH6 and -10V read from CH7. But on further inspection it states on page 13 of the datasheet

"The SAR contents (a 12-/14-/16-bit

data word) which represents the difference of ADC+ and

ADC– are loaded into the 12-/14-/16-bit shift register."

so it looks like the maximum reportable differential voltage is + and - 5V?  Everything greater than this is +full-scale on CH6 and -full-scale on CH7

I could configure channels 6 and 7 as single ended referenced to COM which will give me +10 on CH6 and -10V on CH7 but won't remove the common mode noise.