LC87F1L16A Datasheet, PDF (17/24 Pages) Sanyo Semicon Device – 8-bit 1-chip Microcontroller with USB-host controller

LC87F1L16A
AD Converter Characteristics at Ta = -40°C to +85°C, VSS1 = VSS2 = VSS3 = 0V
<12-bits AD Converter Mode>
Parameter
Symbol
Pin/Remarks
Resolution
Absolute
accuracy
Conversion time
N
ET
TCAD
Analog input
voltage range
VAIN
AN0(P00) to
AN7(P07),
AN8(P70),
AN9(P71),
AN10(XT1),
AN11(XT2)
Conditions
(Note 6-1)
See conversion time calculation
formulas. (Note 6-2)
VDD[V]
3.0 to 5.5
3.0 to 5.5
4.5 to 5.5
3.0 to 5.5
3.0 to 5.5
min
32
64
VSS
Specification
typ
max
unit
12
bit
±16 LSB
115
μs
115
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
<8-bits AD Converter Mode>
Parameter
Symbol
Pin/Remarks
Resolution
Absolute
accuracy
Conversion time
N
ET
TCAD
Analog input
voltage range
VAIN
AN0(P00) to
AN7(P07),
AN8(P70),
AN9(P71),
AN10(XT1),
AN11(XT2)
Conditions
(Note 6-1)
See conversion time calculation
formulas. (Note 6-2)
VDD[V]
3.0 to 5.5
3.0 to 5.5
4.5 to 5.5
3.0 to 5.5
3.0 to 5.5
min
20
40
VSS
Specification
typ
max
unit
8
bit
±1.5 LSB
90
μs
90
VDD
V
Analog port
IAINH
VAIN=VDD
3.0 to 5.5
input current
IAINL
VAIN=VSS
3.0 to 5.5
-1
Conversion time calculation formulas :
12-bits AD Converter Mode : TCAD (Conversion time) = ((52/(AD division ratio))+2) × (1/3) × tCYC
8-bits AD Converter Mode : TCAD (Conversion time) = ((32/(AD division ratio))+2) × (1/3) × tCYC
1
μA
<Recommended Operating Conditions>
External
oscillator
FmCF[MHz]
Supply Voltage
Range
VDD[V]
System Clock
Division
(SYSDIV)
Cycle Time
tCYC [ns]
AD Frequency
Division Ratio
(ADDIV)
Conversion Time (TCAD)[μs]
12-bit AD
8-bit AD
4.0 to 5.5
1/1
12
3.0 to 5.5
1/1
250
1/8
34.8
21.5
250
1/16
69.5
42.8
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.
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