MB89143 View Datasheet(PDF) - Fujitsu

Part Name

Description

Manufacturer

MB89143

8-bit Proprietary Microcontroller

Fujitsu 

MB89143A/144A

5. A/D Converter Electrical Characteristics

Parameter

Symbol

(VCC = 5.0 V±10%, AVSS = VSS = 0.0 V, FCH = 8 MHz, TA = –40°C to +85°C)

Pin

Condition

Min.

Value

Typ.

Max.

Unit Remarks

Resolution

—

—

—

—

—

8

bit

Total error

—

—

—

—

—

±3.0

LSB

Linearity error

—

—

—

—

—

±1.0

LSB

Differential linearity

error

—

—

—

—

—

±0.9

LSB

Zero transition

voltage

VOT

AN0 to AN7

—

AVSS – 1.5 LSB AVSS + 0.5 LSB AVSS + 2.5 LSB mV

Full-scale transition

voltage

VFST

AN0 to AN7

—

AVR – 3.5 LSB AVR – 1.5 LSB AVR + 0.5 LSB mV

Interchannel

disparity

—

—

—

—

—

1.0

LSB

A/D conversion time —

—

—

—

44 tinst

—

µs

Sense mode

conversion time

—

—

—

—

12 tinst

—

µs

Analog port input

current

IAIN

AN0 to AN7

AVR =

VCC = 5.0 V

—

—

10

µA

Analog input voltage — AN0 to AN7

—

0

—

AVR

V

Reference voltage

—

AVR

—

4.5

—

VCC

V

Reference-voltage

supply current

IR

AVR AVR = 5.0 V

—

200

—

µA

Notes: • The smaller the | AVR – AVSS |, the greater the error would become relatively.

• The output impedance of the external circuit for the analog input must satisfy the following conditions:

Output impedance of the external circuit < Approx. 10 kΩ

If the output impedance of the external circuit is too high, an analog voltage sampling time might be

insufficient (sampling time = 22 µs at 8 MHz oscillation).

Analog Input Equivalent Circuit

If the analog input

impedance is 10 kΩ

or more, it is

recommended to

connect an external

capacitor of approx.

0.1 µF.

Analog input pin

SamCple=. .h3o3ldpFcircuit

Comparator

R .=. 6 kΩ

Close for 8 instruction cycles after

activating A/D conversion.

Analog channel selector

27

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