
MB90945 Series
56
5.
A/D Converter
(T
A
=
40
°
C to
+
105
°
C, 3.0 V
≤
AVRH
AVRL, V
CC
=
AV
CC
=
5.0 V
±
10
%
, V
SS
=
AV
SS
=
0 V)
Value
* : When not operating A/D converter, this is the current (V
CC
=
AV
CC
=
AVRH
=
5.0 V) .
Terminology
Conversion error
Notes :
t
CP
is the machine clock cycle time (Unit : ns) . Refer to “4. AC Characteristics (1) Clock timing” rating
for t
CP
.
The accuracy gets worse as
|AVRH
AVRL| becomes smaller.
Parameter
Symbol
Pin
Unit
Remarks
Min
Typ
Max
Resolution
10
±
3.0
±
2.5
bit
Total error
LSB
Nonlinearity error
LSB
Differential
nonlinearity error
±
1.9
LSB
Zero reading voltage
V
OT
AN0 to AN14 AVRL
1.5 AVRL
+
0.5 AVRL
+
2.5 LSB
Full scale reading
voltage
V
FST
AN0 to AN14 AVRH
3.5 AVRH
1.5 AVRH
+
0.5 LSB
Compare time
3.3
66 t
CP
16500
∞
μ
s
μ
s
Sampling time
1.6
32 t
CP
Analog port input
current
I
AIN
AN0 to AN14
0.3
+0.3
μ
A
Analog input voltage
range
V
AIN
AN0 to AN14
AVRL
AVRH
V
Reference voltage
range
AVRH
AVRL
+
2.7
0
3.5
165
AV
CC
V
AVRL
AVRH
2.7
7.5
V
Power supply current
I
A
AV
CC
mA
μ
A
μ
A
μ
A
I
AH
AV
CC
5
*
Reference voltage
current
I
R
AVRH
250
I
RH
AVRH
5
*
Offset between input
channels
AN0 to AN14
4
LSB
: Absolute maximum conversion deviation with respect to the theoretical conversion
line.
: Relative maximum conversion deviation with respect to the theoretical conversion
line conncecting to the device unigque zero reading voltage and full scale reading
voltage.
: Max conversion deviation in any two adjacent reading voltages with respect to the
theoretical LSB conversion step.
: Input voltage which results in the minimum conversion value.
Full scale reading voltage : Input voltage which results in the maximum conversion value.
Nonlinearity
Differential nonlinearity
Zero reading voltage