LC87F76C8A

No.A0858-17/24

AD Converter Characteristics at VSS1 = VSS2 = 0V

<12bits AD Converter Mode at Ta =-30 to +70

°C>

Specification

Parameter

Symbol

Pin/Remarks

Conditions

VDD[V]

min

typ

max

unit

Resolution

N

3.0 to 5.5

12

bit

Absolute

accuracy

ET

(Note 6-1)

3.0 to 5.5

±16

LSB

4.0 to 5.5

32

100

Conversion

time

tCAD

See conversion time calculation

formulas.

(Note 6-2)

3.0 to 5.5

40

100

μs

Analog input

voltage range

VAIN

VSS

VDD

V

IAINH

VAIN=VDD

1

Analog port

input current

IAINL

AN0(P80)

to AN7(P87),

AN8(P70),

AN9(P71),

AN10(XT1),

AN11(XT2)

VAIN=VSS

5

-1

μA

<8bits AD Converter Mode at Ta =-30 to +70

°C>

Specification

Parameter

Symbol

Pin/Remarks

Conditions

VDD[V]

min

typ

max

unit

Resolution

N

3.0 to 5.5

8

bit

Absolute

accuracy

ET

(Note 6-1)

3.0 to 5.5

1.5

LSB

4.0 to 5.5

20

90

See "Conversion time calculation

method."

(Note 6-2)

3.0 to 5.5

40

90

Conversion

time

tCAD

See "Conversion time calculation

method."

(Note 6-2)

Ta=-10 to 50

°C

3.0 to 5.5

VSS

VDD

μs

Analog input

voltage range

VAIN

3.0 to 5.5

1

V

IAINH

VAIN=VDD

3.0 to 5.5

-1

Analog port

input current

IAINL

AN0(P80)

to AN7(P87),

AN8(P70),

AN9(P71),

AN10(XT1)

AN11(XT2)

VAIN=VSS

3.0 to 5.5

-1

μA

<Conversion time calculation method>

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>

Conversion Time (tCAD)[

μs]

External

oscillator

FmCF[MHz]

Supply Voltage

Range

VDD[V]

System Clock

Division

(SYSDIV)

Cycle Time

tCYC [ns]

AD Frequency

Division Ratio

(ADDIV)

12-bit AD

8-bit AD

4.0 to 5.5

1/1

250

1/8

34.8

21.5

12

3.0 to 5.5

1/1

250

1/16

69.5

42.8

Note 6-1: The quantization error (±1/2LSB) is excluded from the absolute accuracy value. The absolute accuracy refers

to the accuracy that is measured while there is no change in the I/O state of the pins adjacent to the analog

input channel.

Note 6-2: The conversion time refers to the interval from the time the instruction for starting the converter is issued till

the time the complete digital- conversion-value corresponding to the analog input value is loaded in the

required register.