over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted), all TYP values are measured at 25℃ and all linearity parameters are measured using 12-bit resolution mode (unless otherwise noted) (1)
| PARAMETER |
TEST CONDITIONS |
MIN |
TYP |
MAX |
UNIT |
| EI |
Integral
linearity error (INL) |
External reference (2) |
-2 |
|
2 |
LSB |
| ED |
Differential
linearity error (DNL) Guaranteed no missing codes |
External reference (2) |
-1 |
|
1 |
LSB |
| EO |
Offset error |
Internal or External reference (2) (3) |
-5 |
|
5 |
mV |
| EG |
Gain error |
External reference (2) |
-4 |
|
4 |
LSB |
(1) Total Unadjusted Error (TUE) can be calculated from EI , EO , and EG using the following formula: TUE = √( EI2 + |EO|2 + EG2 )
Note: You must convert all of the errors into the same unit, usually LSB, for the above equation to be accurate
(2) All external reference specifications are measured with VR+ = VREF+ = VDD and VR- = VSS = 0V, external 1uF cap on VREF+ pin.
(3) Please note that to achieve this offset error using internal reference VREF, VRSEL bit in MEMCTL register needs to be set to the external reference mode. This will set the REFN as VREF- and REFP as VREF+. In this configuration ,no external connections can be made on the VREF- and VREF+ pins.