SBAS784A January 2019 – May 2019 ADS1260-Q1 , ADS1261-Q1
PRODUCTION DATA.
The full-scale calibration word is 24 bits consisting of three 8-bit registers, as listed in Table 12. The full-scale calibration value is in straight-binary format, normalized to a unity-gain factor at a value of 400000h. Table 13 lists register values for selected gain factors. Gain errors greater than unity are corrected by using full-scale values less than 400000h. Although the full-scale register provides a wide range of possible values, the input signal after calibration must not exceed ±106% of the precalibrated input range; otherwise, the ADC is overranged.
REGISTER | BYTE ORDER | ADDRESS | BIT ORDER | |||||||
---|---|---|---|---|---|---|---|---|---|---|
FSCAL0 | LSB | 0Ah | B7 | B6 | B5 | B4 | B3 | B2 | B1 | B0 (LSB) |
FSCAL1 | MID | 0Bh | B15 | B14 | B13 | B12 | B11 | B10 | B9 | B8 |
FSCAL2 | MSB | 0Ch | B23 (MSB) | B22 | B21 | B20 | B19 | B18 | B17 | B16 |
FSCAL[2:0] REGISTER VALUE | GAIN FACTOR |
---|---|
433333h | 1.05 |
400000h | 1.00 |
3CCCCCh | 0.95 |