LC877917A Datasheet, PDF (20/29 Pages) Sanyo Semicon Device – 8-bit 1-chip Microcontroller

LC877917A
AD Converter Characteristics at VSS1 = VSS2 = 0V
<12bits AD Converter Mode at Ta=-40 to +85°C> <Normal power mode only>
Parameter
Symbol
Resolution
Absolute
accuracy
Conversion time
N
ET
TCAD
Pin/Remarks
AN0(P00) to
AN4(P04),
AN5(P70) to
AN6(P71)
Analog input
voltage range
Analog port input
current
VAIN
IAINH
IAINL
Conditions
(Note 7-1)
• See Conversion time
calculation formulas.
(Note 7-2)
VAIN=VDD
VAIN=VSS
VDD[V]
3.0 to 3.6
3.0 to 3.6
3.0 to 3.6
3.0 to 3.6
3.0 to 3.6
3.0 to 3.6
Specification
min
typ
max
unit
12
bit
±16 LSB
64
115 μs
VSS
-1
VDD
V
1
μA
<8bits AD Converter Mode at Ta=-40 to +85°C> <Normal power mode only>
Parameter
Symbol
Resolution
Absolute
accuracy
Conversion time
N
ET
TCAD
Pin/Remarks
AN0(P00) to
AN4(P04),
AN5(P70) to
AN6(P71)
Analog input
voltage range
Analog port input
current
VAIN
IAINH
IAINL
Conditions
(Note 7-1)
• See Conversion time
calculation formulas.
(Note 7-2)
VAIN=VDD
VAIN=VSS
VDD[V]
3.0 to 3.6
3.0 to 3.6
3.0 to 3.6
3.0 to 3.6
3.0 to 3.6
3.0 to 3.6
Specification
min
typ
max
Unit
8
bit
±1.5 LSB
40
90 μs
VSS
-1
VDD
V
1
μA
Conversion Time Calculation Formulas:
12bits AD Converter Mode : TCAD(Conversion time) = ((52/(division ratio))+2)×(1/3)×tCYC
8bits AD Converter Mode : TCAD(Conversion time) = ((32/(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-4MHz
3.0V to 3.6V
1/1
750ns
1/8
104.5μs
64.5μs
Note 7-1: 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 7-2: 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.A1840-20/29