
ADC10 Characteristics
MC68HC908QL4 MC68HC908QL3 MC68HC908QL2 Data Sheet, Rev. 4
Freescale Semiconductor
215
17.13 ADC10 Characteristics
Characteristic
Conditions
Symbol
Min
Typ
(1)
Max
Unit
Comment
Supply voltage
Absolute
V
DD
3.0
—
5.5
V
Supply Current
ADLPC = 1
ADLSMP = 1
ADCO = 1
V
DD
< 3.6 V (3.3 V Typ)
I
DD(2)
—
55
—
μ
A
V
DD
< 5.5 V (5.0 V Typ)
—
75
—
Supply current
ADLPC = 1
ADLSMP = 0
ADCO = 1
V
DD
< 3.6 V (3.3 V Typ)
I
DD(2)
—
120
—
μ
A
V
DD
< 5.5 V (5.0 V Typ)
—
175
—
Supply current
ADLPC = 0
ADLSMP = 1
ADCO = 1
V
DD
< 3.6 V (3.3 V Typ)
I
DD(2)
—
140
—
μ
A
V
DD
< 5.5 V (5.0 V Typ)
—
180
—
Supply current
ADLPC = 0
ADLSMP = 0
ADCO = 1
V
DD
< 3.6 V (3.3 V Typ)
I
DD(2)
—
340
—
μ
A
V
DD
< 5.5 V (5.0 V Typ)
—
440
615
ADC internal clock
High speed (ADLPC = 0)
f
ADCK
0.40
(3)
—
2.00
MHz
t
ADCK
= 1/f
ADCK
Low power (ADLPC = 1)
0.40
(3)
—
1.00
Conversion time
(4)
10-bit Mode
Short sample (ADLSMP = 0)
t
ADC
19
19
21
t
ADCK
cycles
Long sample (ADLSMP = 1)
39
39
41
Conversion time
(4)
8-bit Mode
Short sample (ADLSMP = 0)
t
ADC
16
16
18
t
ADCK
cycles
Long sample (ADLSMP = 1)
36
36
38
Sample time
Short sample (ADLSMP = 0)
t
ADS
4
4
4
t
ADCK
cycles
Long sample (ADLSMP = 1)
24
24
24
Input voltage
V
ADIN
V
SS
—
V
DD
V
Input capacitance
C
ADIN
—
7
10
pF
Not tested
Input impedance
R
ADIN
—
5
15
k
Not tested
Analog source impedance
R
AS
—
—
10
k
External to
MCU
Ideal resolution (1 LSB)
10-bit mode
RES
1.758
5
5.371
mV
V
REFH
/2
N
8-bit mode
7.031
20
21.48
Total unadjusted error
10-bit mode
E
TUE
0
±
1.5
±
2.5
LSB
Includes
quantization
8-bit mode
0
±
0.7
±
1.0
Differential non-linearity
10-bit mode
DNL
0
±
0.5
—
LSB
8-bit mode
0
±
0.3
—
Monotonicity and no-missing-codes guaranteed
— Continued on next page