LC87F2W48A Datasheet, PDF (18/26 Pages) Sanyo Semicon Device – 50K-byte FROM and 1536-byte RAM integrated 8-bit 1-chip Microcontroller

LC87F2W48A
AD Converter Characteristics at VSS1 = VSS2 = VSS3 = 0V
<12bits AD Converter Mode at Ta = -40 to +85°C>
Parameter
Resolution
Absolute
accuracy
Conversion
time
Symbol
N
ET
TCAD
Analog input
voltage range
Analog port
input current
VAIN
IAINH(1)
IAINL(1)
IAINH(2)
IAINL(2)
Pin/Remarks
AN0(P00) to
AN7(P07),
AN8(P70),
AN9(P71),
AN10(XT1),
AN11(XT2),
AN12(CF1),
AN13(CF2)
analog channel
except AN12
AN12
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
VAIN=VDD
VAIN=VSS
VDD[V]
2.7 to 5.5
3.0 to 5.5
2.7 to 3.6
4.5 to 5.5
3.0 to 5.5
2.7 to 3.6
2.7 to 5.5
2.7 to 5.5
2.7 to 5.5
2.7 to 5.5
2.7 to 5.5
min
32
64
410
Specification
typ
max
unit
12
bit
±16
LSB
±20
115
115
μs
425
VSS
-1
-15
VDD
V
1
μA
15
<8bits AD Converter Mode at Ta = -40 to +85°C>
Parameter
Symbol
Pin/Remarks
Conditions
Specification
VDD[V]
min
typ
max
unit
Resolution
N
AN0(P00) to
2.7 to 5.5
8
bit
Absolute
accuracy
Conversion
time
ET
TCAD
Analog input
voltage range
VAIN
AN7(P07),
AN8(P70),
AN9(P71),
AN10(XT1),
AN11(XT2),
AN12(CF1),
AN13(CF2)
(Note 6-1)
See Conversion time calculation
formulas. (Note 6-2)
See Conversion time calculation
formulas. (Note 6-2)
2.7 to 5.5
4.5 to 5.5
3.0 to 5.5
2.7 to 3.6
2.7 to 5.5
20
40
250
VSS
±1.5 LSB
70
70
μs
265
VDD
V
Analog port
input current
IAINH(1)
IAINL(1)
IAINH(2)
analog channel
except AN12
AN12
VAIN=VDD
VAIN=VSS
VAIN=VDD
2.7 to 5.5
2.7 to 5.5
-1
2.7 to 5.5
1
μA
15
IAINL(2)
VAIN=VSS
2.7 to 5.5
-15
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
<Recommended Operating Conditions>
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
4.5V 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
4.5V 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
2.7V 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.A1869-18/26