LC872G08A_10 Datasheet, PDF (16/27 Pages) Sanyo Semicon Device – 8K/6K/4K-byte ROM and 256-byte RAM integrated 8-bit 1-chip Microcontroller

LC872G08A/06A/04A
AD Converter Characteristics at VSS1 = 0V
<12bits AD Converter Mode/Ta = -40°C to +85°C >
Parameter
Symbol
Resolution
Absolute
accuracy
Conversion time
N
ET
TCAD
Pin/Remarks
AN0(P00) to
AN6(P06),
AN8(P70)
Analog input
voltage range
Analog port
input current
VAIN
IAINH
IAINL
Conditions
(Note 6-1)
(Note 6-1)
• See Conversion time calculation
formulas. (Note 6-2)
• See Conversion time calculation
formulas. (Note 6-2)
VAIN=VDD
VAIN=VSS
VDD[V]
2.4 to 5.5
3.0 to 5.5
2.4 to 3.6
4.0 to 5.5
3.0 to 5.5
2.4 to 3.6
2.4 to 5.5
2.4 to 5.5
2.4 to 5.5
min
32
64
410
Specification
typ
max
unit
12
bit
±16
LSB
±20
115
115
μs
425
VSS
-1
VDD
V
1
μA
<8bits AD Converter Mode/Ta = -40°C to +85°C >
Parameter
Symbol
Pin/Remarks
Conditions
VDD[V]
min
Specification
typ
max
unit
Resolution
N
AN0(P00) to
2.4 to 5.5
8
bit
Absolute
accuracy
ET
AN6(P06)
AN8(P70)
(Note 6-1)
2.4 to 5.5
±1.5 LSB
Conversion time TCAD
• See Conversion time calculation 4.0 to 5.5
20
formulas. (Note 6-2)
3.0 to 5.5
40
• See Conversion time calculation
2.4 to 3.6
250
formulas. (Note 6-2)
90
90
μs
265
Analog input
voltage range
VAIN
2.4 to 5.5
VSS
VDD
V
Analog port
input current
IAINH
IAINL
VAIN=VDD
VAIN=VSS
2.4 to 5.5
2.4 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-10MHz
4.0V to 5.5V
3.0V to 5.5V
1/1
300ns
1/8
41.8μs
25.8μs
1/1
300ns
1/16
83.4μs
51.4μs
CF-4MHz
3.0V to 5.5V
2.4V to 3.6V
1/1
750ns
1/8
104.5μs
64.5μs
1/1
750ns
1/32
416.5μs
256.5μs
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.A1400-16/27