Electrical Characteristics
Table 14. 5 Volt 10-bit ADC Operating Conditions (continued)
C
D
Characteristic
ADC conversion clock
frequency
Conditions
High Speed (ADLPC=0)
Low Power (ADLPC=1)
Symb
f ADCK
Min.
0.4
0.4
Typical
Max.
8.0
8.0
Unit
MHz
SIMPLIFIED
INPUT PIN EQUIVALENT
CIRCUIT
Z ADIN
V AS
+
R AS
Z AS
C AS
+
V ADIN
Pad
leakage
due to
input
protection
SIMPLIFIED
CHANNEL SELECT
CIRCUIT
R ADIN
ADC SAR
ENGINE
R ADIN
INPUT PIN
INPUT PIN
INPUT PIN
R ADIN
R ADIN
C ADIN
Figure 21. ADC Input Impedance Equivalency Diagram
Table 15. 10-bit ADC Characteristics
Characteristic
Conditions
C
Symb
Min
Typical 1
Max
Unit
Supply current
ADLPC = 1
ADLSMP = 1
T
I DDAD
133
μ A
ADCO = 1
Supply current
ADLPC = 1
ADLSMP = 0
T
I DDAD
218
μ A
ADCO = 1
Supply current
ADLPC = 0
ADLSMP = 1
T
I DDAD
327
μ A
ADCO = 1
Supply current
ADLPC = 0
ADLSMP = 0
C
I DDAD
0.582
1
mA
ADCO = 1
MC9RS08KA8 Series MCU Data Sheet, Rev. 4
22
Freescale Semiconductor
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