Figure 54 shows the data bytes come out msbyte first, but it doesn’t explicitly show bit order within each byte.
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Hi Jay Prizant,
Welcome to the TI E2E Forums!
The ADS1282-HT outputs the most significant bit first (in each byte).
If you are using the FIR filter, then the first bit you clock out will be the sign-bit. Each consecutive data bit that you clock out from there will carry a smaller weight, until you clock out the LSB (second to last bit) and then a redundant sign bit (last bit).
Please note that when using the FIR filter, the 31-bit data is LEFT-aligned in the 32-bit word and the last bit will be a redundant sign bit.
However, if you only use the SINC filter (i.e. FILTR[1:0] = 01b), then the 31-bit data will be RIGHT-aligned in the 32-bit word and there won't be a redundant sign-bit.