S6E1C3 Datasheet, PDF (85/107 Pages) Cypress Semiconductor – 32-bit ARM® Cortex®-M0+ FM0+ Microcontroller

Analog signal
source
REXT
ANxx
Analog input pins
RAIN
S6E1C3 Series
Comparator
CAIN
(Equation 1) tS ≥ (RAIN + REXT ) × CAIN × 9
tS:
Sampling time
RAIN:
Input resistance of A/D Converter = 2.2 kΩ with 2.7 < VCC < 3.6
Input resistance of A/D Converter = 5.5 kΩ with 1.8 < VCC < 2.7
Input resistance of A/D Converter = 10.5 kΩ with 1.65 < VCC < 1.8
CAIN:
Input capacitance of A/D Converter = 7.5 pF with 1.65 < VCC < 3.6
REXT:
Output impedance of external circuit
(Equation 2) tC=tCCK × 14
tC:
Compare time
tCCK :
Compare clock cycle
Document Number: 002-00233 Rev.*B
Page 85 of 107