SBAA506 March 2021 ADS131B04-Q1 , ADS131M02 , ADS131M03 , ADS131M04 , ADS131M06 , ADS131M08
The following table shows the measured gain error with all the protection circuit including BAT54, BAV199 diode, 1-kΩ and 100-Ω series resistors. The input is a differential signal for the measurement. At room temperature without calibration, a gain error is present. Once a calibration (two point calibration) is applied to the measured results from the ADS131M08, the gain error is minimized to nearly zero.
| Measurements at Room Temperature (25°C) | |||||
|---|---|---|---|---|---|
| VS (V) | Measured VS (V) |
Code |
Uncalibrated VS (V) | Voltage Error Without Calibration (%) | Voltage Error With Calibration (%) |
|
1.14 |
1.139898 |
7913462 | 1.132030 | 0.690 | 0.000 |
|
1.0 |
0.999916 | 6941921 | 0.993050 | 0.687 | 0.002 |
|
0.8 |
0.799941 | 5553901 | 0.794492 | 0.681 | 0.003 |
|
0.5 |
0.499973 | 3471737 | 0.496636 | 0.667 | 0.004 |
|
0.05 |
0.050034 | 348389 | 0.049837 | 0.393 | 0.000 |
|
0 |
0.000043 | 1068 | 0.000153 |
― |
― |
|
–0.05 |
–0.049958 | –345711 | –0.049454 | 1.008 | 0.000 |
|
–0.5 |
–0.499903 | –3469100 | –0.496259 | 0.729 | 0.003 |
|
–0.8 |
–0.799879 | –5551380 | –0.794131 | 0.719 | 0.004 |
|
–1.0 |
–0.999867 | –6939513 | –0.992705 | 0.716 | 0.003 |
|
–1.14 |
–1.139845 | –7910985 | –1.131675 | 0.717 | 0.000 |