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1.概述 在工业过程控制、医疗器械、电子称及多媒体等许多应用中,对系统的速度、功耗及成本等性能的要求越来越高。为了满足这些要求,迫使设计工程师进一步求助于数字电路,尤其是模数转换器(ADC)——系统前端数据转换部分的核心。 ADC芯片制造商将更先进的CMOS和BiCMOS生产工艺用于设计合理的IC结构中,推出了一系列高性能、高分辨率的数据转换器,即采用了更高集成度的方案,集成了芯片周围更多的功能和接口。事实上,这些集成化的ADC包括了完整的前端系统,能够直接与传感器连接,而无须任何附加的输入信号调理电路。同时,这些IC采用更小的封装形式,保证低电压、低功耗方式工作,在更大程度上降低系统成本。
1. Overview In many applications, such as industrial process control, medical devices, electronic scales and multimedia, there is an increasing demand for performance such as system speed, power consumption and cost. In order to meet these requirements, designers are forced to further resort to digital circuits, especially analog-to-digital converters (ADCs) - the heart of the system’s front-end data conversion. ADC chip makers will be more advanced CMOS and BiCMOS production process used in the design of a reasonable IC structure, the introduction of a series of high-performance, high-resolution data converter that uses a more integrated solution, the integrated chip Around the more features and interfaces. In fact, these integrated ADCs include a complete front-end system that connects directly to the sensor without the need for any additional input signal conditioning circuitry. At the same time, these ICs are packaged in a smaller form factor to ensure low-voltage, low-power operation, reducing system costs to a greater degree.