cop87l88cf National Semiconductor Corporation, cop87l88cf Datasheet - Page 7

• Manufacturer Part Number: cop87l88cf
• Description: 8-bit Cmos Otp Microcontrollers With 16k Memory And A/d Converter
• Manufacturer: National Semiconductor Corporation

Resolution
Reference Voltage Input
Absolute Accuracy
Non-Linearity
Differential Non-Linearity
Input Reference Resistance
Common Mode Input Range (Note 10)
DC Common Mode Error
Off Channel Leakage Current
On Channel Leakage Current
A/D Clock Frequency (Note 8)
Conversion Time (Note 7)
A/D Converter Specifications
Note 7: Conversion Time includes sample and hold time.
Note 8: See Prescaler description.
Note 9: Pins G6 and RESET are designed with a high voltage input network for factory testing. These pins allow input voltages greater than V
have sink current to V
tance to V
Note 10: 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
should be −0.3V to V
V
CC
= 5V
CC
±
is 750
IN
10% (V
Parameter
(−) V
CC
CC
(typical). These two pins will not latch up. The voltage at the pins must be limited to less than 14V.
IN
(+) the digital output code will be 0000 0000. Two on-chip diodes are tied to each analog input. The diodes will forward conduct for analog
+0.3V.
SS
when biased at voltages greater than V
IN
− 0.050V)
does not exceed the supply voltage by more than 50 mV, the output code will be correct. To achieve an absolute 0 V
CC
Any Input
supply. Be careful, during testing at low V
AGND = 0V
V
V
Deviation from the
Best Straight Line
V
FIGURE 3. MICROWIRE/PLUS Timing
REF
REF
REF
(V
= V
= V
= V
CC
Conditions
CC
CC
CC
CC
+ 0.050V)
(the pins do not have source current when biased at a voltage below V
DC
over temperature variations, initial tolerance and loading. The voltage on any analog input
7
CC
levels (4.5V), as high level analog inputs (5V) can cause this input diode
AGND
DS101134-26
Min
1.6
0.1
3
Typ
12
1
1
V
Max
1.67
V
±
±
±
4.8
±
REF
8
CC
1
1
1
2
⁄
⁄
⁄
2
2
4
CC
). The effective resis-
CC
DC
and the pins will
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A/D Clock
to 5 V
Cycles
Units
MHz
LSB
LSB
LSB
LSB
Bits
k
µA
µA
V
V
DC
input