What This Document Is
These are lecture notes from ELENG 247A, Introduction to Microelectromechanical Systems, offered at the University of California, Berkeley. Specifically, these notes cover the critical area of data converter testing – a foundational element in understanding and validating the performance of analog-to-digital and digital-to-analog conversion systems. The material is presented in a detailed, lecture-style format spanning 39 pages, intended to supplement classroom instruction.
Why This Document Matters
This resource is invaluable for students enrolled in an introductory MEMS course, particularly those focusing on signal processing, analog circuit design, or system-level integration. It’s also beneficial for engineers needing a refresher on data converter evaluation techniques. Use these notes during your study of analog and mixed-signal systems, when preparing for assignments, or as a reference while working on projects involving data acquisition and control. Understanding these concepts is crucial for designing reliable and accurate MEMS-based systems.
Topics Covered
* Detailed examination of Data Converter Testing methodologies
* Analysis of Differential Nonlinearity (DNL) and Integral Nonlinearity (INL) characteristics
* Techniques for measuring DNL and INL, including servo-loop approaches
* Code density testing and histogram analysis for ADC evaluation
* Dynamic testing methods and their application to ADC performance
* Spectral testing to reveal dynamic behavior and error sources
* Relationships between key performance metrics like DNL, SNR, INL, and SFDR
* Understanding and calculating Effective Number of Bits (ENOB)
What This Document Provides
* A comprehensive overview of ADC and DAC testing principles.
* Illustrative diagrams and explanations of complex testing setups.
* In-depth discussion of the challenges and considerations in accurate performance measurement.
* Detailed exploration of the code boundary servo technique for precise input voltage determination.
* Insights into the impact of measurement equipment limitations on test results.
* A strong foundation for interpreting data converter specifications and datasheets.
