MC912DG128A Motorola, MC912DG128A Datasheet - Page 357

• Manufacturer Part Number: MC912DG128A
• Description: Microcontrollers
• Manufacturer: Motorola

7-elec
MOTOROLA
8-bit resolution
8-bit differential non-linearity
8-bit integral non-linearity
8-bit absolute error
10-bit resolution
10-bit differential non-linearity
10-bit integral non-linearity
10-bit absolute error
Maximum source impedance
1. V
2. At V
3. These values include quantization error which is inherently 1/2 count for any A/D converter.
4. Maximum source impedance is application-dependent. Error resulting from pin leakage depends on junction leakage into
INL and DNL are characterized using the process window parameters affecting the ATD accuracy, but they are not tested.
the pin and on leakage due to charge-sharing with internal capacitance.
Error from junction leakage is a function of external source impedance and input leakage current. Expected error in result
value due to junction leakage is expressed in voltage (V
where I
clock speed, the number of channels being scanned, and source impedance. For 8-bit conversions, charge pump leakage
is computed as follows:
RH
REF
V
V
OFF
RL
= 5.12V, one 8-bit count = 20 mV, and one 10-bit count = 5mV.
DD
is a function of operating temperature. Charge-sharing effects with internal capacitors are a function of ATD
(1)
5.12V; V
(1)
5.0 Vdc 10%, V
,(3)
(3)
Table 70 Analog Converter Characteristics (Operating)
2, 4, 8, and 16 ATD sample clocks
Characteristic
DDA
2, 4, 8, and 16 ATD sample clocks
(2)
(2)
V
(2)
V
(2)
SSA
ERRJ
SS
5.12V
.25pF
0 Vdc, T
V
Electrical Characteristics
DDA
A
V
T
ERRJ
R
L
S
to T
ERRJ
ATDCLK/(8
H
R
):
, ATD Clock
S
I
Symbol
OFF
1 count
1 count
DNL
DNL
INL
INL
AE
AE
R
S
number of channels)
2 MHz, unless otherwise noted
–2.5
Min
–2
–2
0.5
1
1
MC68HC912DT128A Rev 2.0
Typical
20
20
5
Electrical Characteristics
note
Max
See
Tables of Data
2.5
0.5
2
2
1
1
(4)
count
count
count
count
count
count
Unit
mV
mV
K
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