Datasheet

Chapter 3 Electrical Characteristics and Timing Specifications
MC9S08AC128 Series Data Sheet, Rev. 4
22 Freescale Semiconductor
Figure 3-8. ADC Input Impedance Equivalency Diagram
+
–
+
–
V
AS
R
AS
C
AS
V
ADIN
Z
AS
Pad
leakage
due to
input
protection
Z
ADIN
SIMPLIFIED
INPUT PIN EQUIVALENT
CIRCUIT
R
ADIN
ADC SAR
ENGINE
SIMPLIFIED
CHANNEL SELECT
CIRCUIT
INPUT PIN
R
ADIN
C
ADIN
INPUT PIN
R
ADIN
INPUT PIN
R
ADIN