MC68HC908QY2 MOTOROLA [Motorola, Inc], MC68HC908QY2 Datasheet - Page 221

• Manufacturer Part Number: MC68HC908QY2
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

18.13 Analog-to-Digital Converter Characteristics
1. Source impedances greater than 10 k adversely affect internal RC charging time during input sampling.
2. Zero-input/full-scale reading requires sufficient decoupling measures for accurate conversions.
3. The external system error caused by input leakage current is approximately equal to the product of R source and input
MOTOROLA
Supply voltage
Input voltages
Resolution
Absolute accuracy
ADC internal clock
Conversion range
Power-up time
Conversion time
Sample time
Zero input reading
Full-scale reading
Input capacitance
Input leakage
current.
MC68HC908QY4•MC68HC908QT4•MC68HC908QY2•MC68HC908QT2•MC68HC908QY1•MC68HC908QT1
Characteristic
(1)
(3)
(3)
(2)
Symbol
V
V
t
f
C
t
ADPU
t
Z
F
B
A
R
ADIC
DDAD
ADC
ADIN
ADS
—
ADI
ADI
ADI
AD
AD
AD
Electrical Specifications
(V
DD
V
V
Min
2.7
0.5
FE
16
16
00
—
—
8
0.5
5
SS
SS
min)
(V
DD
1.048
Max
V
V
5.5
± 1
FF
17
—
01
8
1.5
DD
DD
8
max)
Analog-to-Digital Converter Characteristics
t
t
t
ADIC
ADIC
ADIC
MHz
Unit
LSB
Hex
Hex
Bits
pF
V
V
V
cycles
cycles
cycles
A
Electrical Specifications
Includes quantization
tested only at 1 MHz
t
t
t
t
ADIC
ADIC
ADIC
ADIC
Comments
Not tested
V
V
IN
IN
= 1/f
= 1/f
= 1/f
= 1/f
—
—
—
—
—
= V
= V
ADIC
SS
DD
ADIC
ADIC
ADIC
,
221