Este capítulo de ofrece una breve introducción a los convertidores de datos y, a continuación, echa un vistazo a algunas técnicas de convertidores muy utilizadas en sistemas embebidos. En "Lecturas complementarias" se incluyen recursos para quienes deseen profundizar en el rendimiento de los convertidores y en la tecnología de los circuitos internos.
Dentro de un sistema electrónico, los convertidores de datos crean los puentes necesarios entre el control digital y los dispositivos periféricos no digitales. La conversión de información analógica en datos digitales es fundamental para la electrónica moderna(Figura 7-1). Los sistemas integrados modernos interactúan con los dispositivos periféricos mediante convertidores de datos. Los sistemas de procesamiento digital de señales y de control digital requieren interfaces con el mundo exterior. Los convertidores digital-analógico (DAC) y analógico-digital (ADC) proporcionan esta interfaz y también se utilizan como parte de los circuitos de accionamiento y detección.
Figura 7-1. Convertidores de datos en un sistema
Aspectos básicos del rendimiento del DAC
Como caja negra de , los DAC pueden dividirse en dos grupos:
Los DAC de tasa Nyquist actualizan su salida una vez por ...
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