STM8L151X6 datasheet(111/142 Pages) STMICROELECTRONICS

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DocID15962 Rev 15

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STM8L151x4/6, STM8L152x4/6

Electrical parameters

115

Figure 38. ADC1 accuracy characteristics

Figure 39. Typical connection diagram using the ADC

1. Refer to Table 53 for the values of RAIN and CADC.

2. Cparasitic represents the capacitance of the PCB (dependent on soldering and PCB layout quality) plus the

pad capacitance (roughly 7 pF). A high Cparasitic value will downgrade conversion accuracy. To remedy

this, fADC should be reduced.

1LSBIDEAL

(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.

4095

4094

4093

456

4093 4094 4095 4096

(1)

(2)

(3)

VDDA

VSSA

ai14395b

VREF+

4096

(or

depending on package)]

VDDA

4096

[1LSBIDEAL =

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