June 2014
Beginner to intermediate
208 pages
7h 14m
English
Content preview from Computer Interfacing
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Conversion between digital and analogue
comparison the same conversion carried out by the SAR
type would take just N μ5 = 12 μ$!
The hardware for this type of converter can be reduced
by using machine code software to run the successive
approximation process.
Clock
Successive
approximation
logic
Analogue
input
V|N
P
—Nv Digital
l—y/ output
iz.
DAC
Comparator
Figure
3.10 The
Successive Approximation Register (SAR) type
of ADC, offering
a
considerable speed advantage over
the
counter-based types
A practical ADC/ DAC circuit
The ZN425E IC is a versatile converter chip that can be
configured by either a DAC or an ADC. By simple switch-
ing it i
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