LC87F7DC8A_10 Datasheet, PDF (19/26 Pages) Sanyo Semicon Device – FROM 128K byte, RAM 4K byte on-chip 8-bit 1-chip Microcontroller

LC87F7DC8A
AD Converter Characteristics at VSS1 = VSS2 = VSS3 =0V
<12bits AD Converter Mode at Ta =-xx to +xx°C> To be determined after evaluation
Parameter
Resolution
Absolute
accuracy
Conversion
time
Symbol
N
ET
tCAD
Pin/Remarks
AN0(P80) to
AN7(P87),
AN8(P70),
AN9(P71),
AN10(XT1),
AN11(XT2)
Analog input
voltage range
Analog port
input current
VAIN
IAINH
IAINL
Conditions
(Note 6-1)
(Note 6-1)
Ta =-10 to +50°C
• See Conversion time calculation
formulas.
(Note 6-2)
Ta =-10 to +50°C
• See Conversion time calculation
formulas.
(Note 6-2)
VAIN=VDD
VAIN=VSS
VDD[V]
min
VSS
-1
Specification
typ
max
unit
12
bit
LSB
μs
VDD
V
1
μA
<8bits AD Converter Mode at Ta =-30 to +70°C>
Parameter
Resolution
Absolute
accuracy
Conversion
time
Analog input
voltage range
Analog port
input current
Symbol
N
ET
TCAD
VAIN
IAINH
IAINL
Pin/Remarks
AN0(P80) to
AN7(P87),
AN8(P70),
AN9(P71),
AN10(XT1),
AN11(XT2)
Conditions
(Note 6-1)
• See Conversion time calculation
formulas.
(Note 6-2)
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
Specification
min
typ
max
unit
8
bit
1.5 LSB
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
<Recommended Operating Conditions>
External
oscillation
FmCF [MHz]
Operating supply
voltage range
VDD [V]
System division ratio
(SYSDIV)
Cycle time
tCYC [ns]
AD division
ratio
(ADDIV)
AD conversion time
(tCAD) [μs]
12bit AD
8bit AD
4.0 to 5.5
1/1
250
1/8
TBD
21.5
12
3.0 to 5.5
1/1
250
1/16
TBD
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.A1156-19/26