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ADC0800PCD View Datasheet(PDF) - National ->Texas Instruments

Part NameDescriptionManufacturer
ADC0800PCD 8-Bit A/D converter National-Semiconductor
National ->Texas Instruments National-Semiconductor
ADC0800PCD Datasheet PDF : 10 Pages
1 2 3 4 5 6 7 8 9 10
Application Hints (Continued)
ZERO AND FULL-SCALE ADJUSTMENT
Zero Adjustment This is the offset voltage required at the
bottom of the R-network (pin 5) to make the 11111111 to
11111110 transition when the input voltage is LSB (20
mV for a 10 24V scale) In most cases this can be accom-
plished by having a 1 kX pot on pin 5 A resistor of 475X
can be used as a non-adjustable best approximation from
pin 5 to ground
Typical Applications
General Connection
Full-Scale Adjustment This is the offset voltage required
at the top of the R-network (pin 15) to make the 00000001
to 00000000 transition when the input voltage is 1 LSB
from full-scale (60 mV less than full-scale for a 10 24V
scale) This voltage is guaranteed to be within g2 LSB for
the ADC0800 without adjustment In most cases adjust-
ment can be accomplished by having a 1 kX pot on pin 15
Ratiometric Input Signal with Tracking Reference
TL H 5670 – 11
Hi-Voltage CMOS Output Levels
0V to 10V VIN range
0V to 10V output levels
TL H 5670 – 12
TL H 5670 – 4
5
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