MC68HC08AB16A View Datasheet(PDF) - Motorola => Freescale

Part Name

Description

Manufacturer

MC68HC08AB16A

HCMOS Microcontroller Unit

Motorola => Freescale 

Freescale Semiconductor, Inc.

Electrical Specifications

ADC Characteristics

23.10 ADC Characteristics

Characteristic(1)

Symbol

Min

Max

Unit

Comments

Supply voltage

VDDAREF should be tied

VDDAD

4.5

5.5

(VDD min) (VDD max)

V

to the same potential as

VDD via separate

traces.

Input voltages

VADIN

0

VDDAREF

VREFH

1.5

VDDAREF

V

VADIN ≤ VREFH

Resolution

BAD

8

8

Bits

Absolute accuracy

(VREFL = 0 V,

VREFH = VDDAD = 5 V ± 10%)

ADC internal clock

AAD

fADIC

± 1/2

0.5

±1

1.048

LSB

MHz

Includes quantization

tAIC = 1/fADIC, tested

only at 1 MHz

Conversion range

RAD

VREFL

VREFH

V

VREFL = VSSA

Power-up time

tADPU

16

—

tAIC cycles

Conversion time

Sample time(2)

Zero input reading(3)

Full-scale reading(3)

tADC

16

tADS

5

ZADI

00

FADI

FE

17

tAIC cycles

—

tAIC cycles

01

Hex

FF

Hex

VIN = VREFL

VIN = VREFH

Input capacitance

Input leakage(4)

Port B

CADI

—

8

pF

—

—

±1

µA

Not tested

Notes:

1. VDD = 5.0 Vdc ± 10%, VDDA = VDDAREF = 5.0 Vdc ± 10%, VREFH = 5.0 Vdc ± 10%, VSS = 0 Vdc, VREFL = VSSA = 0 Vdc

2. Source impedances greater than 10 kΩ adversely affect internal RC charging time during input sampling.

3. Zero-input/full-scale reading requires sufficient decoupling measures for accurate conversions.

4. The external system error caused by input leakage current is approximately equal to the product of R source and input

current.

MC68HC08AB16A — Rev. 2.0

MOTOROLA

Electrical Specifications

For More Information On This Product,

Go to: www.freescale.com

Technical Data

371

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