ST72F324K2TATR View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
ST72F324K2TATR
STMicroelectronics
ST72F324K2TATR Datasheet PDF : 194 Pages
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Electrical characteristics
ST72324xx-Auto
12.13.3 ADC accuracy
Table 111. ADC accuracy
Symbol
Parameter
Conditions
Typ
Max(1) Unit
|ET| Total unadjusted error(2)
4
6
|EO| Offset error(2)
|EG| Gain error(2)
3
5
0.5
LSB
|ED| Differential linearity error(2)
|EL| Integral linearity error(2)
CPU in run mode @ fADC 2 MHz
4.5
1.5
1. Data based on characterization results, monitored in production to guarantee 99.73% within ± max value from -40°C to
125°C (± 3σ distribution limits).
t(s) 2. ADCxx accuracy vs. negative injection current: Injecting negative current may reduce the accuracy of the conversion being
performed on another analog input. Any positive injection current within the limits specified for IINJ(PIN) and ΣIINJ(PIN) in
Section 12.9 does not affect the ADC accuracy.
duc Figure 89. ADC accuracy characteristics
te Pro 1023
le 1022
o 1021
Obs 7
) - 6
t(s 5
c 4
u 3
rod 2
P 1
Digital result ADCDR
1LSBIDEAL
=
-V----A----R-----E----F------–----V----S-----S----A---
1024
(2)
ET
EO
EL
1 LSBIDEAL
te 0
1234567
ObsoleVSSA
EG
(3)
(1)
ED
(1) Example of an actual transfer curve.
(2) The ideal transfer curve.
(3) End point correlation line.
ET = Total Unadjusted Error: maximum
deviation between the actual and the ideal
transfer curves.
EO = Offset Error: deviation between the first
actual transition and the first ideal one.
EG = Gain Error: deviation between the last
ideal transition and the last actual one.
ED = Differential Linearity Error: maximum
deviation between actual steps and the ideal
one.
EL = Integral Linearity Error: maximum
deviation between any actual transition and the
end point correlation line.
1021 1022 1023 1024
VAREF
VIN (LSBIDEAL)
174/193
Doc ID 13841 Rev 1
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