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Filter Component Considerations in Precision Signal-Conversion Applications

Connecting an analog sensor source to an analog-to-digital converter (ADC) load is a very common design challenge in sensing and detection applications. Maximizing system performance requires some key circuit-design considerations. This article focuses on data conversion of precision analog signals. Specific guidelines are presented on the design tradeoffs between different circuit topologies, when to use a capacitor and a resistor in the signal path, and the choice of component values for maximum sensing precision.

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About the Author
Daniel Burton has nine years of experience as an applications engineer with National Semiconductor, where he has specialized in the definition, development, and design of sensors and data converters for precision signal path applications. Prior to joining National Semiconductor, he had 15 years of experience in the design and applications of custom systems. Daniel received his BSEE degree from San Jose State University. His personal interests include hiking, SCUBA, amateur (ham) radio and alternative energy.

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