Datasheet

Table Of Contents
Electrical characteristics STM32F405xx, STM32F407xx
136/202 DocID022152 Rev 8
Figure 49. ADC accuracy characteristics
1. See also Table 68.
2. Example of an actual transfer curve.
3. Ideal transfer curve.
4. End point correlation line.
5. E
T
= 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.
Figure 50. Typical connection diagram using the ADC
1. Refer to Table 67 for the values of R
AIN
, R
ADC
and C
ADC
.
2. C
parasitic
represents the capacitance of the PCB (dependent on soldering and PCB layout quality) plus the
pad capacitance (roughly 5
pF). A high C
parasitic
value downgrades conversion accuracy. To remedy this,
f
ADC
should be reduced.
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