Datasheet

MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
Electrical Characteristics
Freescale Semiconductor30
7P
Conversion
time (including
sample time)
Short sample (ADLSMP = 0)
t
ADC
—20 —
ADCK
cycles
See
Ta bl e 1 0
for
conversion
time
variances
Long sample (ADLSMP = 1) — 40 —
8TSample time
Short sample (ADLSMP = 0)
t
ADS
—3.5 —
ADCK
cycles
Long sample (ADLSMP = 1) — 23.5 —
9
T
Tot a l
unadjusted
error
12-bit mode
E
TUE
— 3.0 —
LSB
2
Includes
quantizatio
n
P 10-bit mode — 1 2.5
T 8-bit mode — 0.5 1.0
10
T
Differential
non-linearity
12-bit mode
DNL
— 1.75 —
LSB
2
P 10-bit mode
3
— 0.5 1.0
T 8-bit mode
3
— 0.3 0.5
11
T
Integral
non-linearity
12-bit mode
INL
— 1.5 —
LSB
2
T 10-bit mode — 0.5 1.0
T 8-bit mode — 0.3 0.5
12
T
Zero-scale
error
12-bit mode
E
ZS
— 1.5 —
LSB
2
V
ADIN
=
V
SSA
P 10-bit mode — 0.5 1.5
T 8-bit mode — 0.5 0.5
13
T
Full-scale error
12-bit mode
E
FS
— 1—
LSB
2
V
ADIN
=
V
DDA
P 10-bit mode — 0.5 1
T 8-bit mode — 0.5 0.5
14 D
Quantization
error
12-bit mode
E
Q
— –1 to 0 —
LSB
2
10-bit mode — — 0.5
8-bit mode — — 0.5
15 D
Input leakage
error
12-bit mode
E
IL
— 1—
LSB
2
Pad
leakage
4
*
R
AS
10-bit mode — 0.2 2.5
8-bit mode — 0.1 1
16 D
Temp sensor
voltage
25CV
TEMP25
—1.396 — V
17 D
Temp sensor
slope
–40 C–25 C
m
—3.266 —
mV/C
25 C–85 C—3.638—
1
Typical values assume V
DDA
= 5.0 V, Temp = 25 C, f
ADCK
= 1.0 MHz unless otherwise stated. Typical values are for reference only
and are not tested in production.
2
1 LSB = (V
REFH
– V
REFL
)/2
N
.
Table 14. 5 Volt 12-bit ADC Characteristics (V
REFH
= V
DDA
, V
REFL
= V
SSA
) (continued)
Num C Characteristic Conditions Symb Min Typical
1
Max Unit Comment