Datasheet

STM8S105xx
Electrical characteristics
3. End point correlation line
E
T
= Total unadjusted error: maximum deviation between the actual and the ideal
transfer curves.
E
O
= Offset error: deviation between the first actual transition and the first ideal one.
E
G
= Gain error: deviation between the last ideal transition and the last actual one.
E
D
= Differential linearity error: maximum deviation between actual steps and the ideal
one.
E
L
= Integral linearity error: maximum deviation between any actual transition and the
end point correlation line.
Figure 46: Typical application with ADC
10.3.12 EMC characteristics
Susceptibility tests are performed on a sample basis during product characterization.
10.3.12.1 Functional EMS (electromagnetic susceptibility)
While executing a simple application (toggling 2 LEDs through I/O ports), the product is
stressed by two electromagnetic events until a failure occurs (indicated by the LEDs).
• FESD: Functional electrostatic discharge (positive and negative) is applied on all pins
of the device until a functional disturbance occurs. This test conforms with the IEC
61000-4-2 standard.
• FTB: A burst of fast transient voltage (positive and negative) is applied to V
DD
and V
SS
through a 100 pF capacitor, until a functional disturbance occurs. This test conforms to
IEC 61000-4-4 standard.
A device reset allows normal operations to be resumed. Test results are given in table
below based on the EMS levels and classes defined in application note AN1709 (EMC
design guide for ST Microcontrollers).
10.3.12.2 Designing hardened software to avoid noise problems
EMC characterization and optimization are performed at component level with a typical
application environment and simplified MCU software. It should be noted that good EMC
performance is highly dependent on the user application and the software in particular.
Therefore it is recommended that the user applies EMC software optimization and
prequalification tests in relation with the EMC level requested for his application.
Software recommendations
The software flowchart must include the management of runaway conditions such as:
• Corrupted program counter
• Unexpected reset
• Critical data corruption (control registers...)
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