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Demystifying Mixed Signal Test Methods by Mark Baker

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CHAPTER 8

TESTING ANALOG-TO-DIGITAL CONVERTERS

Fast is fine, but accuracy is everything.

—Wyatt Earp

8.1 Introduction

I used to say that testing an ADC was twice as difficult as testing a DAC. I was way off. It’s a lot harder than that. Much of the terminology for ADC testing is similar to the terminology for DAC testing, but the methodology is much different. An ADC produces a set of digital codes that correspond to the analog input level. Like a DAC, testing the DC performance of an ADC consists largely of verifying a consistent and linear response. In ...

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