S6J3200 Datasheet, PDF (146/179 Pages) Cypress Semiconductor – 32-bit Microcontroller Traveo꽬 Family

S6J3200 Series
8.5.2 Notes on A/D Converters
About the Output Impedance of an External Circuit for Analog Input
When the external impedance is too high, the analog voltage sampling time may become insufficient. In this case, we recommend
attaching a capacitor (about 0.1 µF) to an analog input pin.
Analog input circuit model
R
Analog input
C
Sampling ON
Comparator
R
C
12-bit A/D
3.9 kiloohms (max)
11.0 pF (max)
Note: Use the numerical values provided here simply as a guide.
(4.5 V≤AVCC≤5.5 V)
8.5.3 Glossary
Resolution: Analog change that can be identified by an A/D converter
Integral linearity error: Deviation of the straight line connecting the zero transition point ("0000 0000 0000" <--> "0000 0000 0001")
and full-scale transition point ("1111 1111 1110" <--> "1111 1111 1111") from actual conversion characteristics
includes zero transition error, full-scale transition error, and non linearity error.
Differential linearity error: Deviation from the ideal value of the input voltage required for changing the output code by 1 LSB
Total error : Difference between the actual value and the theoretical value. The total error
8.5.4 Calibration Condition
Calibration Condition should be the followings.
 AVCC=5.0V
 AVRH=5.0V
 Ta=25℃
 system clock frequency (CLK_LCP1A)= 10MHz
See A/D Converter Calibration on the S6J3200 hardware manual.
Document Number: 002-05682 Rev.*A
Page 146 of 179