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一、前言在计算机实时控制、数字量测仪表等应用中,常用 AD 转换器完成模拟量到数字量的转换。现在广泛使用的有八位和十二位各种型号和性能的芯片。十二位 AD 目前价格仍较昂贵。对转换速度要求不高的场合,若八位 AD 转换器不能满足精度要求时,则可采用4(1/2)位高精度A/D 转换器,如 INTESIL 公司的 ICL7135及国产 CHT135,5G7135等。其精度优于十二位
I. Preface In computer real-time control, digital measuring instruments and other applications, commonly used AD converter to complete the analog to digital conversion. Now widely used in eight and twelve various models and performance of the chip. Twelve AD prices are still relatively expensive. If the AD converter can not meet the accuracy requirements, 4 (1/2) -bit high-precision A / D converters such as ICES7135 by INTESIL Corporation and domestic CHT135, 5G7135, etc. can be used . Its accuracy is better than twelve