mc68hc912dg128 Freescale Semiconductor, Inc, mc68hc912dg128 Datasheet - Page 390

• Manufacturer Part Number: mc68hc912dg128
• Description: M68hc12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Electrical Specifications
Technical Data
390
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
where I
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
speed, the number of channels being scanned, and source impedance. Charge pump leakage is computed as follows:
RH
REF
OFF
V
V
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 clock
5.12V; V
(1)
(1)
5.0 Vdc 10%, V
,(3)
Table 19-6. Analog Converter Characteristics (Operating)
(3)
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
Freescale Semiconductor, Inc.
SS
For More Information On This Product,
5.12V
.25pF
0 Vdc, T
Go to: www.freescale.com
V
Electrical Specifications
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
MC68HC912DG128 — Rev 3.0
Typical
20
20
5
note
Max
See
2.5
0.5
2
2
1
1
MOTOROLA
(4)
count
count
count
count
count
count
Unit
mV
mV
K