MB89191A 데이터 시트보기 (PDF) - Fujitsu

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MB89191A

8-bit Proprietary Microcontroller

Fujitsu 

MB89190/190A Series

5. A/D Converter Electrical Characteristics (MB89190A Series Only)

Parameter

Resolution

Total error

Linearity error

Differential linearity

error

Sym-

bol

—

Zero transition

voltage

VOT

Full-scale transition

voltage

VFST

Inter channel

disparity

A/D mode

conversion time

—

Sense mode

conversion time

Analog port input

current

IAIN

Analog input voltage

—

Reference voltage

IR

Reference voltage

supply current

IRH

(AVCC = VCC = 3.5 V to 6.0 V, AVSS = VSS = 0.0 V, TA = –40°C to +85°C)

Value

Pin

Condition

Unit Remarks

Min. Typ. Max.

—

—

—

8

bit

—

—

±1.5 LSB

—

—

±1.0 LSB

—

—

±0.9 LSB

AVSS

AVSS

AVSS

AVR = AVCC

–1.0

LSB

+0.5

LSB

+2.0 mV

LSB

—

AVR AVR

–3.0 –1.5

AVR mV

LSB LSB

—

—

0.5 LSB

—

44 tinst*

—

µs

—

12 tinst*

—

µs

—

AN0 to AN7

—

—

10

µA

0

—

AVR

V

0

—

VCC

V

AVR

AVR = VCC =

—

5.0 V when A/

D conversion is —

operating

100

300 µA

—

1

µA

*: For information on tinst, see “(4) Instruction Cycles” in “4. AC Characteristics.”

6. A/D Converter Glossary

• Resolution

Analog changes that are identifiable by the A/D converter.

When the number of bits is 8, analog voltage can be divided into 28=256.

Linearity error (unit: LSB)

The deviation of the straight line connecting the zero transition point (“0000 0000” ↔ “0000 0001”) with the

full-scale transition point (“1111 1110” ↔ “1111 1111”) from actual conversion characteristics.

Differential linearity error (unit: LSB)

The deviation of input voltage needed change the output code by 1 LSB from the theoretical value.

• Total error (unit: LSB)

The difference between theoretical and actual conversion values.

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