March 7, 2017

An Introduction to Mixed-Signal Test and Measurement by Gordon Roberts, Friedrich Taenzler, Mark Burns

By Gordon Roberts, Friedrich Taenzler, Mark Burns

Built-in circuits incorporating either electronic and analog capabilities became more and more usual within the semiconductor undefined. Mixed-signal IC attempt and dimension has grown right into a hugely really good box of electric engineering. besides the fact that, try out engineering continues to be a comparatively unknown occupation in comparison to IC layout engineering.

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These requirements include board thickness, connector locations, DUT socket mechanical holes, and various alignment pins and holes. Handlersand probersmust makea reliable electricalconnectionbetweenthe DUT andthe tester. Unfortunately,the metallic contactsbetween DUT and DIB board are often very inductiveand/orcapacitive. Stray inductanceand capacitanceof the contactscan representa major problem,especiallywhen testinghigh-impedanceor high-frequencycircuits. Although Chapter 1 . Overview of Mixed-Signal Testing 19 severalcompanieshave marketed test sockets that reduce these problems, a socketed device will often not perform quite as well as a device soldered directly to a printed circuit board.

3 Electromechanical Fixturing Challenges The test head and DlB board must ultimately make contact to the DUT through the handler or prober. There are few mechanical standardsin the ATE industry to specify how a tester should be docked to a handler or prober. The test engineer has to design a DlB board that not only meets electrical requirements, but also meets the mechanical docking requirements. These requirements include board thickness, connector locations, DUT socket mechanical holes, and various alignment pins and holes.

This test cost includes tester depreciation, handler depreciation, electricity, floor space, personnel, etc. 5 s, assuming 5 million devices per year are to be shipped. 5 s. 19. , for each $1 worth of devices shipped to the customer, the company makes a profit of 20 cents). 18? 80, how many devices does this represent? What obvious conclusion can we draw about the importance of test time reduction versus the importance of selling and shipping additional devices? References 1. , Boston,MA 02118 2.

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