SBAS691B March 2016 – October 2018 ADS1282-SP
PRODUCTION DATA.
The offset calibration is a 24-bit word, composed of three 8-bit registers, as shown in Table 18. The offset register is left-justified to align with the 32-bits of conversion data. The offset is in twos complement format with a maximum positive value of 7FFFFFh and a maximum negative value of 800000h. This value is subtracted from the conversion data. A register value of 00000h has no offset correction (default value). While the offset calibration register value can correct offsets ranging from –FS to +FS (as shown in Table 16), to avoid input overload, the analog inputs cannot exceed the full-scale range.
OFC REGISTER | FINAL OUTPUT CODE(1) |
---|---|
7FFFFFh | 80000000h |
000001h | FFFFFF00h |
000000h | 00000000h |
FFFFFFh | 00000100h |
800000h | 7FFFFF00h |