LC87F2C64A Datasheet, PDF (19/28 Pages) Sanyo Semicon Device – 8-bit 1-chip Microcontroller

LC87F2C64A
AD Converter Characteristics at VSS1=VSS2=VSS3=0V
<12bits AD Converter Mode / Ta=-30 to +70°C>
Parameter
Resolution
Absolute accuracy
Conversion time
Symbol
N
ET
tCAD
Analog input voltage
range
Analog port input
current
VAIN
IAINH
IAINL
Pin/Remarks
AN0(P80) to
AN7(P87)
AN8(PB0) to
AN15(PB7)
Conditions
(Note 6-1)
• See Conversion time calculation
formulas.
(Note 6-2)
• VAIN=VDD
• VAIN=VSS
VDD[V]
3.0 to 5.5
3.0 to 5.5
4.0 to 5.5
3.0 to 5.5
3.0 to 5.5
3.0 to 5.5
3.0 to 5.5
min
32
64
Specification
typ
max
unit
12
bit
±16 LSB
115
μs
115
VSS
-1
VDD
V
1
µA
<8bits AD Converter Mode / Ta=-30 to +70°C>
Parameter
Symbol
Pin/Remarks
Conditions
VDD[V]
Specification
min
typ
max
unit
Resolution
N
AN0(P80) to
3.0 to 5.5
8
bit
Absolute accuracy
ET
AN7(P87)
(Note 6-1)
3.0 to 5.5
Conversion time
tCAD
AN8(PB0) to
• See Conversion time calculation 4.0 to 5.5
20
AN15(PB7)
formulas.
(Note 6-2)
3.0 to 5.5
40
±1.5 LSB
95
μs
95
Analog input voltage VAIN
range
3.0 to 5.5
VSS
VDD
V
Analog port input
current
IAINH
IAINL
• VAIN=VDD
• VAIN=VSS
3.0 to 5.5
3.0 to 5.5
-1
1
μA
Conversion time calculation formulas:
12bits AD Converter Mode : TCAD(Conversion time) = ((52/(AD division ratio))+2)×(1/3)×tCYC
8bits AD Converter Mode : TCAD(Conversion time) = ((32/(AD division ratio))+2)×(1/3)×tCYC
External
oscillation
(FmCF)
Operating supply
voltage range
(VDD)
System division ratio
(SYSDIV)
Cycle time
(tCYC)
AD division
ratio
(ADDIV)
AD conversion time
(TCAD)
12bit AD
8bit AD
CF-12MHz
4.0V to 5.5V
3.0V to 5.5V
1/1
250ns
1/8
34.8μs
21.5μs
1/1
250ns
1/16
69.5μs
42.8μs
CF-4MHz
3.0V to 5.5V
1/1
750ns
1/8
104.5μs
64.5μs
Note 6-1: 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 6-2: 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.
No.A1935-19/28