cop888eb National Semiconductor Corporation, cop888eb Datasheet - Page 9

• Manufacturer Part Number: cop888eb
• Description: 8-bit Cmos Rom Based Microcontrollers With 8k Memory, Can Interface, 8-bit A/d, And Usart
• Manufacturer: National Semiconductor Corporation

Differential Input Voltage
Input Offset Voltage
Input Common Mode
Voltage Range
Input Hysteresis
Resolution
Absolute Accuracy
Non-Linearity
Deviation from the Best Straight Line
Differential Non-Linearity
Common Mode Input Range (Note 24)
DC Common Mode Error
Off Channel Leakage Current
On Channel Leakage Current
A/D Clock Frequency (Note 23)
Conversion Time (Note 22)
Internal Reference Resistance Turn-On Time (Note 25)
CAN Comparator DC and AC Characteristics
A/D Converter Specifications
Note 22: Conversion Time includes sample and hold time.
Note 23: See Prescaler description.
Note 24: For V
input voltages below ground or above the V
to conduct — especially at elevated temperatures, and cause errors for analog inputs near full-scale. The spec allows 50 mV forward bias of either diode. This means
that as long as the analog V
voltage range will therefore require a minimum supply voltage of 4.950 V
Note 25: Time for internal reference resistance to turn on after coming out of Halt or Idle Mode.
(4.5V
4.8V
V
V
CC
CC
Parameter
IN
(−)
5.2V, −40˚C
5.5V) (V
>
= V
IN
IN
(+) the digital output code will be 0000 0000. Two on-chip doides are ties to each analog input. The diodes will forward conduct for analog
Parameter
SS
does not exceed the supply voltage by more than 50 mV, the output code will be correct. To achieve an absolute 0 V
− 0.050V)
T
A
CC
+125˚C
supply. Be careful, during testing at low V
1.5V
Any Input
FIGURE 3. MICROWIRE/PLUS Timing Diagram
<
V
Conditions
IN
<
(V
V
CC
CC
+ 0.050V)
−1.5V
DC
over temperature variations, initial tolerance and loading.
V
Conditions
REF
9
= V
CC
CC
levels (4.5V), as high level analog inputs (5V) can cause this input diode
Min
1.5
8
DS012837-4
GND
Min
0.1
Typ
Typ
17
1
1
Max
±
1.67
V
2.0
2.0
±
±
±
8
0.5
1
CC
V
2
1
1
CC
Max
±
±
25
10
−1.5
A/D Clock Cycles
DC
www.national.com
Units
MHz
LSB
LSB
LSB
LSB
to 5 V
Bits
µA
µA
µs
V
Units
DC
mV
mV
mV
V
input