
LC88F83B0A
No.A1228-19/25
AD Converter Characteristics at VSS = LCDVSS0 = LCDVSS1 = 0V
<12-bits AD Converter Mode/Ta= -10
°C to +75°C>
Parameter
Symbol
Pin/Remarks
Conditions
Specification
VDD[V]
min
typ
max
unit
Resolution
N
AN0(SEG71)
to
AN3(SEG68)
2.9 to 5.5
12
bit
Absolute accuracy
ET
(Note7-1)
2.9 to 5.5
±16
LSB
Conversion time
TCAD
See Conversion time calculation
formulas. (Note7-2)
2.9 to 5.5
90
130
μs
Analog input
voltage range
VAIN
2.9 to 5.5
VSS
VDD
V
Analog ports input
current
IAINH
VAIN=VDD
2.9 to 5.5
1
μA
IAINL
VAIN=VSS
2.9 to 5.5
-1
<8-bits AD Converter Mode/Ta= -10
°C to +75°C >
Parameter
Symbol
Pin/Remarks
Conditions
Specification
VDD[V]
min
typ
max
unit
Resolution
N
AN0(SEG71)
to
AN3(SEG68)
2.9 to 5.5
8
bit
Absolute accuracy
ET
(Note7-1)
2.9 to 5.5
±1.5
LSB
Conversion time
TCAD
See Conversion time calculation
formulas. (Note7-2)
2.9 to 5.5
55
75
μs
Analog input
voltage range
VAIN
2.9 to 5.5
VSS
VDD
V
Analog ports input
current
IAINH
VAIN=VDD
2.9 to 5.5
1
μA
IAINL
VAIN=VSS
2.9 to 5.5
-1
<Conversion Time Calculation Formulas>
12-bits AD Converter Mode: TCAD (Conversion time) = ((52/(Division ratio))+2)
× tCYC
8-bits AD Converter Mode: TCAD (Conversion time) = ((32/(Division ratio))+2)
× tCYC
<Recommended Operating Conditions>
External
Oscillator
FmCF[MHz]
Operating Supply
Voltage Range
VDD[V]
System Division
Ratio
(SYSDIV)
Cycle Time
tCYC [ns]
AD Division Ratio
(ADDIV)
AD Conversion Time (TCAD)[
μs]
12-bit AD
8-bit AD
CF-4
2.9 to 4.0
1/1
250
1/8
104.5
64.5
1/2
500
1/4
105.0
65.0
Note 7-1: The quantization error (
±1/2LSB) must be excluded from the absolute accuracy. The absolute accuracy must
be measured in the microcontroller's state in which no I/O operations occur at the pins adjacent to the analog
input channel.
Note 7-2: The conversion time refers to the period from the time an instruction for starting a conversion process till the
time the conversion results register(s) are loaded with a complete digital conversion value corresponding to
the analog input value.
The conversion time is 2 times the normal-time conversion time when:
The first AD conversion is performed in the 12-bit AD conversion mode after a system reset.
The first AD conversion is performed after the AD conversion mode is switched from 8-bit to 12-bit
conversion mode.