DS1847/DS1848温度系数补编

摘要：摘要： DS1847和DS1848具有两个256位的数字电阻和查找表（LUT），自动调整超过温度范围为-40°C的电阻至95° C 。 DS1848还具有128字节的用户EEPROM非易失（NV）的其他数据存储。可通过一个2线接口，它是用来沟通的芯片多达八颗。目前正在生产中的两个部分，可以转让。本应用笔记介绍了DS1847的温度系数（ TC ） ，特别是，为什么的85OPPM / °C间无偿TC并不适用于使用温度查找功能的系统。它还检查的LUT编程方程的准确性。本文件并不打算是关于如何使用DS1847或DS1848的教程，所以继续之前，请检查设备数据表。

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