单片温度控制器是近年来出现的新型集成电路。由它附加少量外部元件即可构成温度测控电路。本文介绍美国NS公司的单片温控电路LM3911(国内外类似型号的产品有NEC的μPC616和上海半导体器件十六厂的SL616等)的应用。一、结构与性能 LM3911内部结构原理方框图如图1所示。它主要由温度传感器、运放、基准电压源三部分构成。它的输出电压与热力学温度成正比,灵敏度为10mV/K。 Monolithic temperature controller is the emergence of new integrated circuits in recent years. By its addition of a small amount of external components can constitute a temperature measurement and control circuit. This article describes the United States NS single-chip temperature control circuit LM3911 (similar models at home and abroad have NPC’s μPC616 and Shanghai Semiconductor Devices Factory 16 SL616, etc.). First, the structure and performance LM3911 internal structure of the principle block diagram shown in Figure 1. It is mainly composed of temperature sensor, op amp, voltage reference. Its output voltage and thermodynamic temperature is proportional to the sensitivity of 10mV / K.