MC68HC908AB32 MOTOROLA [Motorola, Inc], MC68HC908AB32 Datasheet - Page 379

• Manufacturer Part Number: MC68HC908AB32
• Description: HCMOS Microcontroller Unit
• Manufacturer: MOTOROLA [Motorola, Inc]

23.10 ADC Characteristics
MC68HC908AB32
MOTOROLA
Notes:
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
1. V
2. Source impedances greater than 10 k 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
(V
Port B
V
current.
REFH
REFL
DD
= 5.0 Vdc 10%, V
Characteristic
= 0 V,
= V
DDAD
(2)
(4)
—
(3)
= 5 V 10%)
(3)
Rev. 1.0
(1)
DDA
= V
Freescale Semiconductor, Inc.
DDAREF
For More Information On This Product,
Symbol
V
V
V
t
f
C
ADPU
t
t
Z
F
B
A
R
ADIC
DDAD
REFH
ADC
ADIN
ADS
—
ADI
ADI
ADI
AD
AD
AD
= 5.0 Vdc 10%, V
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Electrical Specifications
(V
V
DD
Min
4.5
1.5
0.5
REFL
FE
16
16
00
—
—
0
8
1/2
5
min)
REFH
(V
V
V
= 5.0 Vdc 10%, V
V
DD
DDAREF
DDAREF
(20) 8
1.048
Max
REFH
5.5
FF
17
01
—
8
max)
1
1
t
t
t
AIC
AIC
AIC
MHz
Unit
LSB
Hex
Hex
Bits
pF
cycles
cycles
cycles
V
V
V
SS
A
= 0 Vdc, V
V
to the same potential as
V
traces.
t
only at 1 MHz
AIC
Includes quantization
DDAREF
DD
Electrical Specifications
REFL
= 1/f
via separate
V
ADC Characteristics
V
V
ADIN
V
Comments
REFL
Not tested
IN
IN
= V
ADIC
should be tied
= V
= V
Technical Data
SSA
= V
V
, tested
REFH
REFL
REFH
= 0 Vdc
SSA
379