mcf51ac256 Freescale Semiconductor, Inc, mcf51ac256 Datasheet - Page 23

• Manufacturer Part Number: mcf51ac256
• Description: Mcf51ac256 Coldfire Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

2.7
2.8
Freescale Semiconductor
Num
1
2
3
4
5
6
7
8
Supply voltage
Ground voltage
Ref Voltage
High
Ref Voltage
Low
Input Voltage
Input
Capacitance
Input
Resistance
Analog Source
Resistance
ADC
Conversion
Clock Freq.
Characteristic
—
C
D
D
D
D
D
D
T
Analog Comparator (ACMP) Electricals
ADC Characteristics
Supply voltage
Supply current (active)
Analog input voltage
Analog input offset voltage
Analog Comparator hysteresis
Analog input leakage current
Analog Comparator initialization delay
Bandgap Voltage Reference
Factory trimmed at V
Absolute
Delta to V
Delta to V
12 bit mode
10 bit mode
8 bit mode (all valid f
High Speed (ADLPC=0)
Low Power (ADLPC=1)
f
f
f
f
Table 12. Analog Comparator Electrical Specifications
ADCK
ADCK
ADCK
ADCK
Conditions
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.1
DD
SS
Table 13. 5 Volt 12-bit ADC Operating Conditions
Rating
DD
(V
(V
> 4MHz
< 4MHz
> 4MHz
< 4MHz
Preliminary—Subject to Change Without Notice
SS
DD
= 3.0 V, Temp = 25°C
-V
-V
SSAD
DDAD
ADCK
)
)
2
)
2
ΔV
ΔV
V
V
Symb
V
V
C
R
f
ADCK
R
DDAD
REFH
REFL
ADIN
ADIN
ADIN
DDAD
SSAD
AS
Symbol
I
V
I
V
t
V
–100
–100
DDAC
V
ALKG
V
AINIT
V
Min
V
SSAD
2.7
2.7
REFL
0.4
0.4
AIO
AIN
—
—
—
—
—
—
—
DD
BG
H
Typical
V
V
V
DDAD
SSAD
4.5
SS
—
—
—
—
—
—
—
—
—
0
0
3
1.19
Min
2.7
3.0
—
—
—
– 0.3
1
Preliminary Electrical Characteristics
V
V
V
Max
100
100
DDAD
SSAD
REFH
5.5
5.5
8.0
4.0
10
10
5
2
5
5
Typical
1.20
6.0
20
20
—
—
—
—
MHz
Unit
mV
mV
kΩ
kΩ
pF
V
V
V
V
Max
20.0
1.21
V
5.5
1.0
1.0
35
40
External to
DD
Comment
MCU
Unit
mV
mV
μA
μA
μs
V
V
V
23