LC87F1D64A Datasheet, PDF (21/29 Pages) Sanyo Semicon Device – CMOS IC FROM 64K byte, RAM 4K byte on-chip 8-bit 1-chip Microcontroller with Full-Speed USB

LC87F1D64A
AD Converter Characteristics at Ta= -30°C to +70°C, VSS1 = VSS2 = VSS3 = 0V
<12-bits AD Converter Mode>
Parameter
Symbol
Resolution
N
Absolute accuracy ET
Conversion time TCAD
Analog input
voltage range
Analog port input
current
VAIN
IAINH
IAINL
Pin/Remarks
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)
AD division ratio=1/16
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
3.0 to 5.5
min
32
64
50
VSS
-1
Specification
typ
max
unit
12
bit
±16 LSB
115
115 μs
115
VDD
V
1
μA
<8-bits AD Converter Mode>
Parameter
Symbol
Pin/Remarks
Resolution
N
Absolute accuracy ET
Conversion time TCAD
Analog input
voltage range
Analog port input
current
VAIN
IAINH
IAINL
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)
AD division ratio=1/16
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
3.0 to 5.5
min
20
40
31
VSS
-1
Specification
typ
max
unit
8
bit
±1.5 LSB
90
90 μs
90
VDD
V
1
μA
<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
<Recommended Operating Conditions>
External
oscillator
FmCF[MHz]
16
Supply Voltage
Range
VDD[V]
3.0 to 5.5
System Clock
Division
(SYSDIV)
1/1
Cycle Time
tCYC [ns]
187.5
AD Frequency
Division Ratio
(ADDIV)
1/16
Conversion Time (TCAD)[μs]
12-bit AD
8-bit AD
52.125
32.125
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
4.0 to 5.5
1/1
8
3.0 to 5.5
1/1
375
1/8
52.25
32.25
375
1/16
104.25
64.25
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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