DS1847/DS1848 温度系数补偿

摘要： 摘要： 既 DS1847 和 DS1848 的特征两个 256 位数字电阻器和查找表 (聿修） 自动调整电阻温度范围为-40 ° C 至 95 ° c。DS1848 还具有 128 个字节的 EEPROM 用户的其它数据的非易失性 (NV) 存储的功能。多达 8 个芯片可以访问通过一个单一的 2 线界面，用于芯片进行沟通。这两个部件目前在生产和可供购买。本文介绍了温度系数 (TC) 的 DS1847，和特别是为什么 85OPPM / ° C 无偿的 TC 并不适用于使用温度查找功能的系统。它还会检查聿修编程方程的准确性。本文档不是要将有关教程，说明如何使用 DS1847 或 DS1848，所以设备数据表，在继续之前，请查看。

Application Note 181
DS1847/DS1848 Temperature Coefficient Supplement
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INTRODUCTION
The DS1847 and DS1848 are temperature-controlled digital resistors. These parts feature an EEPROM
lookup table that allows a resistive function R(T) to be entered into memory, and then the parts are able to
self-adjust their resistance as a function of the ambient temperature. The primary application of these parts is
insertion into systems requiring calibration over temperature that can be accomplished with a variable
resistance. The benefits of using them include the elimination of bulky mechanical potentiometers, IC
reliability, automation of system calibration, and compensa