LC87F1A32A Datasheet, PDF (19/26 Pages) Sanyo Semicon Device – CMOS IC FROM 32K byte, RAM 2048K byte on-chip 8-bit 1-chip Microcontroller with Full-Speed USB

LC87F1A32A
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
VAIN
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)
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
Specification
min
typ
max
unit
12
bit
16 LSB
32
115
s
64
115
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
A
<8-bits AD Converter Mode>
Parameter
Symbol
Resolution
Absolute accuracy
Conversion time
N
ET
TCAD
Analog input
voltage range
VAIN
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)
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
Specification
min
typ
max
unit
8
bit
1.5 LSB
20
90
s
40
90
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
A
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]
Supply Voltage
Range
VDD[V]
System Clock
Division
(SYSDIV)
Cycle Time
tCYC [ns]
AD Frequency
Division Ratio
(ADDIV)
Conversion Time (TCAD)[s]
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.
No.A0704-19/26