MC9S08SE8 Datasheet, PDF (22/38 Pages) Freescale Semiconductor, Inc – 8-Bit HCS08 Central Processor Unit

Electrical Characteristics
3.9 ADC Characteristics
Table 11. 10-Bit ADC Operating Conditions
Characteristic
Conditions
Symb
Min
Typ¹
Max Unit Comment
Supply voltage
Absolute
V_DDA
2.7
—
Delta to V_DD (V_DD – V_DDA)²
ΔV_DDA
–100
0
Ground voltage
Delta to V_SS (V_SS – V_SSA)²
ΔV_SSA
–100
0
5.5
V
100
mV
100
mV
Input voltage
V_ADIN
V_REFL
—
V_REFH
V
Input capacitance
C_ADIN
—
4.5
5.5
pF
Input resistance
R_ADIN
—
3
5
kΩ
Analog source
resistance
10-bit mode
f_ADCK > 4MHz
f_ADCK < 4MHz
R_AS
—
—
—
—
5
10
kΩ
External to
MCU
8-bit mode (all valid f_ADCK)
—
—
10
ADC conversion
clock frequency
High speed (ADLPC = 0)
Low power (ADLPC = 1)
0.4
f_ADCK
0.4
—
—
8.0
MHz
4.0
1 _{Typical values assume VDDA = 5.0 V, Temp = 25 °C, fADCK = 1.0 MHz unless otherwise stated. Typical values are for}
reference only and are not tested in production.
2 _{DC potential difference.}
R_AS
V_AS
+
–
Z_AS
C_AS
SIMPLIFIED
INPUT PIN EQUIVALENT
CIRCUIT
Pad
leakage
due to
input
protection
+
V_ADIN
–
Z_ADIN
SIMPLIFIED
CHANNEL SELECT
CIRCUIT
R_ADIN
ADC SAR
ENGINE
INPUT PIN
INPUT PIN
INPUT PIN
R_ADIN
R_ADIN
R_ADIN
C_ADIN
Figure 18. ADC Input Impedance Equivalency Diagram
MC9S08SE8 Series MCU Data Sheet, Rev. 3
22
Freescale Semiconductor