Support,
I'm currently using the ADC on the TM4C1290N. Please will you help me out with the questions below.
Given the Table below extract from the datasheet:
|
Parameter |
Name |
Max |
Unit |
|
INL |
Integral nonlinearity error, over full input range |
±3.0 |
LSB |
|
EO |
Offset error |
±3.0 |
LSB |
|
EG |
Gain error |
±3.0 |
LSB |
|
ET |
Total unadjusted error, over full input range |
±4.0 |
LSB |
- Are these errors to interpret as ‘static’ errors?
- For a given device, would each of those errors always be the same?
- If not, would they be the same at least during a power-up session?
- Why is the total error, less than the sum of the individual ones?
- i.e. if a single point calibration removes the Offset error, this wouldn’t reduce the total from 4LSB to 1LSB I’d imagine. How should we interpret it?
- Clearly, if the total error can change during a session on a given device, we need to consider its full amount in each reading. While if they are static, the amount of error will be reduced when performing a single point calibration. But how much?
- Any other suggestion to reduce the conversion errors?
Thanks.
