SBAS661C February 2015 – May 2021 ADS1262 , ADS1263
PRODUCTION DATA
The ADC1 full-scale calibration word is 24 bits consisting of three 8-bit registers, as shown in Table 9-25. The full-scale calibration value is straight binary, normalized to a unity-gain correction factor at a register value equal to 400000h. Table 9-26 shows register values for selected gain factors. Correct ADC gain for gain errors greater than one (resulting in full-scale register values less than 400000h, or less than 4000h for ADC2). However, to prevent ADC overrange, the input signal must not exceed ±106% of the precalibrated input range. Do not exceed the PGA input range limits during full-scale calibration.
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 |
The ADC2 full-scale calibration word is 16 bits consisting of two 8-bit registers, as shown in Table 9-27. The full-scale calibration value is straight binary, normalized to a unity correction factor at a register value equal to 4000h. A full-scale register value greater than 4000h increases the ADC2 gain factor.
REGISTER | BYTE ORDER | ADDRESS | BIT ORDER | |||||||
---|---|---|---|---|---|---|---|---|---|---|
ADC2FSC0 | LSB | 19h | B7 | B6 | B5 | B4 | B3 | B2 | B1 | B0 (LSB) |
ADC2FSC1 | MSB | 1Ah | B15 | B14 | B13 | B12 | B11 | B10 | B9 | B8 |