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ADC0803 Datenblatt(PDF) 11 Page - NXP Semiconductors

Teilenummer ADC0803
Bauteilbeschribung  CMOS 8-bit A/D converters
PDF  18 Pages
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Hersteller  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

ADC0803 Datenblatt(HTML) 11 Page - NXP Semiconductors

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Philips Semiconductors
Product data
ADC0803/0804
CMOS 8-bit A/D converters
2002 Oct 17
11
NOTE:
The VREF/2 voltage is either 1/2 the VCC voltage or is that which is forced at Pin 9.
VREF/2
VCC
20
VREF
R
R
DIGITAL
CIRCUITS
ANALOG
CIRCUITS
810
9
SL00021
Figure 6. Internal Reference Design
(5V)
VREF
FS
OFFSET
ADJUST
ZS
OFFSET
ADJUST
330
Ω
0.1
µF
TO VREF/2
TO VIN(–)
+
–
SL00022
Figure 7. Offsetting the Zero Scale and Adjusting the Input
Range (Span)
VOLTAGE
REFERENCE
VREF/2
a. Fixed Reference
b. Fixed Reference Derived from VCC
c. Optional Full
Scale Adjustment
VIN(+)
VIN(–)
VCC
+5V
+
VREF/2
10
µF
A/D
A/D
VIN(+)
VIN(–)
VCC
VREF/2
+
10
µF
+5V
+5V
2 k
Ω
100
Ω
SL00023
2 k
Ω
2 k
Ω
2 k
Ω
Figure 8. Absolute Mode of Operation



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