Design Considerations for a Data Acquisition System (DAS) APPLICATION NOTE
This is a collection of guidelines for the design of a data acquisition system. Its purpose is to supplement the more methodical block-by-block discussions available in numerous other papers and application notes. Emphasis in this note is on the less easily quantifiable happenings “between the blocks,” rather than a description of the block components and their error contributions. This latter information may be found in the Bibliography under “General.”
A data acquisition system is defined to include all the components needed to generate the electrical analogs of various physical variables, transmit these signals to a central location and digitize the information for entry into a digital computer. Among these components are transducers, amplifiers, filters, multiplexers, sample/holds and analog-to-digital converters. The system also includes all signal paths tying these functions together.
Several system architectures will be considered, followed by a general discussion aimed at the designer who must choose hardware for a given application.
Topics include:
• Data Acquisition System Architecture
• Signal Conditioning
• Transducers
• Single-Ended vs. Differential Signal Paths
• Low-Level Signals
•Filters
• Programmable Gain Amplifier
• Sampling Rate
• Computer Interface
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Application note & Design Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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September 2002 |
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Rev 0.00 |
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AN535 |
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989 KB |
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