Freescale Semiconductor MC68HC908MR32 Manual Do Utilizador
Electrical Specifications
MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1
274
Freescale Semiconductor
19.13 Analog-to-Digital Converter (ADC) Characteristics
Characteristic
Symbol
Min
Typ
Max
Unit
Notes
Supply voltage
V
DDAD
4.5
—
5.5
V
V
DDAD
should be tied to
the same potential as
V
DD
via separate traces
Input voltages
V
ADIN
0
—
V
DDAD
V
V
ADIN
<= V
DDAD
Resolution
B
AD
10
—
10
Bits
Absolute accuracy
A
AD
—
—
± 4
LSB
Includes quantization
ADC internal clock
f
ADIC
500 k
—
1.048 M
Hz
t
AIC
= 1/f
ADIC
Conversion range
R
AD
V
SSAD
—
V
DDAD
V
Power-up time
t
ADPU
16
—
—
t
AIC
cycles
Conversion time
t
ADC
16
—
17
t
AIC
cycles
Sample time
t
ADS
5
—
—
t
AIC
cycles
Monotonicity
M
AD
Guaranteed
Zero input reading
Z
ADI
000
—
003
Hex
V
ADIN
= V
SSAD
Full-scale reading
F
ADI
3FC
—
3FF
Hex
V
ADIN
= V
DDAD
Input capacitance
C
ADI
—
—
30
pF
Not tested
V
REFH
/V
REFL
current
I
VREF
—
1.6
—
mA
Absolute accuracy
(8-bit truncation mode)
(8-bit truncation mode)
A
AD
—
—
± 1
LSB
Includes quantization
Quantization error
(8-bit truncation mode)
(8-bit truncation mode)
—
—
—
+ 7/8
– 1/8
– 1/8
LSB