ZHCSK67B June 2017 – August 2019 ADS1287
PRODUCTION DATA.
Table 17 shows that the full-scale calibration register is a 24-bit word, composed of three 8-bit registers. The full-scale calibration value is 24-bit, straight-offset binary, normalized to a scale factor of 1.0 for a register value of 400000h.
REGISTER | BYTE | BIT ORDER | |||||||
---|---|---|---|---|---|---|---|---|---|
FSC0 | LSB | B7 | B6 | B5 | B4 | B3 | B2 | B1 | B0 (LSB) |
FSC1 | MID | B15 | B14 | B13 | B12 | B11 | B10 | B9 | B8 |
FSC2 | MSB | B23 (MSB) | B22 | B21 | B20 | B19 | B18 | B17 | B16 |
Table 18 summarizes the scaling of the full-scale calibration register. A register value equal to 400000h (default value) yields a unity-gain scale factor. Although the full-scale calibration register value can be used to correct gain errors > 1 (gain scale factor < 1), the post-calibrated input voltage cannot exceed 106% of the nominal input range.
FSC[2:0] REGISTERS | SCALE FACTOR |
---|---|
433333h | 1.05 |
400000h | 1.00 |
3CCCCCh | 0.95 |