CHAPTER 19 ELECTRICAL SPECIFICATIONS
User’s Manual U18172EJ2V0UD
290
A/D Converter Characteristics (T
A
=
−
40 to +85
°
C, 2.7 V
≤
V
DD
≤
5.5 V
Note 1
, V
SS
= 0 V
Note 2
)
(1) A/D converter basic characteristics
Parameter Symbol
Conditions
MIN.
TYP.
MAX.
Unit
Resolution
10 10 10
bit
4.5 V
≤
V
DD
≤
5.5 V
3.0
100
µ
s
4.0 V
≤
V
DD
< 4.5 V
4.8
100
µ
s
2.85 V
≤
V
DD
< 4.0 V
6.0
100
µ
s
Conversion time
t
CONV
2.7 V
≤
V
DD
< 2.85 V
14.0
100
µ
s
Analog input voltage
V
AIN
V
SS
Note 2
V
DD
V
(2) A/D Converter Characteristics (high-speed internal oscillation clock)
Parameter Symbol
Conditions
MIN.
TYP.
MAX.
Unit
Overall error
Notes 3, 4
AINL
−
0.1 to +0.2
Note 5
−
0.35 to +0.45
%FSR
Zero-scale error
Notes 3, 4
Ezs
−
0.1 to +0.2
Note 5
−
0.35 to +0.45
%FSR
Full-scale error
Notes 3, 4
Efs
−
0.1 to +0.2
Note 5
−
0.35 to +0.40
%FSR
Integral non-linearity error
Note 3
ILE
±
1
Note 5
±
3 LSB
Differential non-linearity error
Note 3
DLE
±
1
Note 5
±
1.5 LSB
(3) A/D Converter Characteristics (Crystal/Ceramic Oscillation Clock, External Clock)
Parameter Symbol
Conditions
MIN.
TYP.
MAX.
Unit
4.0 V
≤
V
DD
≤
5.5 V
−
0.20 to +0.35
Note 5
−
0.35 to +0.65
%FSR
Overall error
Notes 3, 4
AINL
2.7 V
≤
V
DD
< 4.0 V
±
0.25
Note 5
−
0.35 to +0.55
%FSR
4.0 V
≤
V
DD
≤
5.5 V
−
0.20 to +0.35
Note 5
−
0.35 to +0.65
%FSR
Zero-scale error
Notes 3, 4
Ezs
2.7 V
≤
V
DD
< 4.0 V
±
0.25
Note 5
−
0.35 to +0.55
%FSR
4.0 V
≤
V
DD
≤
5.5 V
−
0.20 to +0.35
Note 5
−
0.35 to +0.55
%FSR
Full-scale error
Notes 3, 4
Efs
2.7 V
≤
V
DD
< 4.0 V
±
0.25
Note 5
−
0.35 to +0.50
%FSR
4.0 V
≤
V
DD
≤
5.5 V
±
1.5
Note 5
±
3.0 LSB
Integral non-linearity error
Note 3
ILE
2.7 V
≤
V
DD
< 4.0 V
±
1.5
Note 5
±
4.0 LSB
4.0 V
≤
V
DD
≤
5.5 V
±
1.0
Note 5
±
2.5 LSB
Differential non-linearity error
Note 3
DLE
2.7 V
≤
V
DD
< 4.0 V
±
1.0
Note 5
±
2.5 LSB
Notes 1.
In the 78K0S/KU1+, V
DD
functions alternately as the A/D converter reference voltage input. When using
the A/D converter, stabilize V
DD
at the supply voltage used (2.7 to 5.5 V).
2.
In the 78K0S/KU1+, V
SS
functions alternately as the ground potential of the A/D converter. Be sure to
connect V
SS
to a stabilized GND (= 0 V).
3.
Excludes quantization error (
±
1/2 LSB).
4.
This value is indicated as a ratio (%FSR) to the full-scale value.
5.
A value when HALT mode is set by an instruction immediately after A/D conversion starts.
Caution The conversion accuracy may be degraded when the analog input pin is used as an alternate I/O port
or if the level of a port that is not used for A/D conversion is changed during A/D conversion.