mc68hc908gp32 Freescale Semiconductor, Inc, mc68hc908gp32 Datasheet - Page 246

• Manufacturer Part Number: mc68hc908gp32
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Electrical Specifications
19.12 ADC Characteristics
246
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 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
(V
Port B
Notes:
V
current.
REFH
REFL
DD
= 5.0 Vdc ± 10%, V
Characteristic
= 0 V,
= V
(2)
DDAD
(4)
(3)
(3)
= 5 V ± 10%)
(1)
SS
= 0 Vdc, V
Symbol
V
V
t
DDAD
f
ADPU
t
Z
C
R
t
F
B
A
DDAD
ADIC
ADIN
ADC
ADS
MC68HC908GP32 Data Sheet, Rev. 10
—
ADI
ADI
ADI
AD
AD
AD
= 5.0 Vdc ± 10%, V
(V
V
DD
Min
2.7
0.5
REFL
FE
16
16
00
—
—
—
0
8
5
min)
SSAD
(V
V
V
DD
(20) 8
1.048
Max
DDAD
5.5
REFH
± 1
± 1
= 0 Vdc, V
FF
17
—
01
8
max)
REFH
t
t
t
AIC
AIC
AIC
MHz
Unit
LSB
Hex
Hex
Bits
pF
µA
cycles
cycles
cycles
V
V
V
= 5.0 Vdc ± 10%, V
the same potential as V
t
AIC
V
Freescale Semiconductor
Includes quantization
DDAD
via separate traces.
= 1/f
V
V
V
REFH
V
REFL
V
Comments
ADIN
Not tested
should be tied to
IN
at 1 MHz
IN
REFL
ADIC
= V
= V
≤ V
= V
= V
, tested only
REFH
= 0
REFL
REFH
SSAD
DDAD
DD