Datasheet

Appendix A Electrical Characteristics
MC9S08LC60 Series Data Sheet: Technical Data, Rev. 4
334 Freescale Semiconductor
Figure A-10. ADC Input Impedance Equivalency Diagram
Analog Source
Resistance
12 bit mode
f
ADCK
> 4MHz
f
ADCK
< 4MHz
R
AS
—
—
—
—
2
5
kΩ External to MCU
10 bit mode
f
ADCK
> 4MHz
f
ADCK
< 4MHz
—
—
—
—
5
10
8 bit mode (all valid f
ADCK
)——10
ADC Conversion
Clock Freq.
High Speed (ADLPC=0) f
ADCK
0.4 — 8.0 MHz
Low Power (ADLPC=1) 0.4 — 4.0
1
Typical values assume V
DDAD
= 3.0V, Temp = 25°C, f
ADCK
=1.0MHz unless otherwise stated. Typical values are for reference only
and are not tested in production.
2
DC potential difference.
Table A-8. 3 Volt 12-bit ADC Characteristics (V
REFH
= V
DDAD
, V
REFL
= V
SSAD
)
Characteristic Conditions C Symbol Min Typ
(1)
Max Unit Comment
Supply Current
ADLPC=1
ADLSMP=1
ADCO=1
TI
DDAD
— 120 — μA
Table A-7. 3 Volt 12-bit ADC Operating Conditions
Characteristic Conditions Symbol Min Typ
(1)
Max Unit Comment
+
–
+
–
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