Chapter 3: Architecture
31
Figure 9: PowerDAQ Sample and Hold Board front-end
The major difference between MF and MFS boards are the SHAs.
Sample and Hold ‘signal switches’ SHAs between ‘sampled’ and ‘hold’
states. When the SHA is in a sample state its output repeats its input.
In the hold state, SHAs keep the output voltage at the same level at
time of switching.
PGA
~
INA
SHA
PGA
~
INA
SHA
MUX
…
…
SE/DF
switch
control
signal
S/H
signal
channel
select
signal
… to range
control,
calibration
circuitry
and ADC
Analog
input 0
Analog
input N
Gain
contro
l
signal
Summary of Contents for PD2-MF
Page 5: ...Table of Contents iii Index 137 ...
Page 11: ...1 1 Introduction ...
Page 18: ......
Page 19: ...9 2 Installation and Configuration ...
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Page 35: ...25 3 Architecture ...
Page 63: ...53 4 PowerDAQ Software Development Kit PD SDK ...
Page 106: ......
Page 107: ...97 5 Calibration ...
Page 109: ...99 A Appendix A Specifications ...
Page 110: ...Appendix A Specifications 100 ...
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Page 113: ...103 B Appendix B Accessories ...
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Page 119: ...109 C Appendix C Application Notes ...
Page 125: ...115 D Appendix D Warranty ...
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Page 129: ...119 E Appendix E Glossary ...
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