Linear LTC2997高精度模拟输出温度检测和遥控方案

1、Linear LTC2997高精度模拟输出温度检测和遥控方案关键字：工业控制,温度测量,温度传感器Linear公司的LTC2997是高精度模拟输出温度传感器,遥控温度的精度为±1,内部温度测量的精度为±1.5,内置了串联电阻消除,工作电压2.5V-5.5V,输出增益4mV/°C,静态电流170uA,1.8V基准电压输出,主要用在温度测量,遥控温度测量,环境监视,系统热量控制,笔记本和台式电脑以及网络服务器.本文介绍了LTC2997主要特性, 方框图,以及遥控和遥测多种应用电路.LTC2997 Features Description Remote/Internal

2、 Temperature SensorThe LTC2997 is a high-accuracy analog output temperature sensor. It converts the temperature of an external sensor or its own temperature to an analog voltage output. A built-in algorithm eliminates errors due to series resistance between the LTC2997 and the sensor diode.The LTC29

3、97 gives accurate results with low-cost diodeconnected NPN or PNP transistors or with integrated temperature transistors on microprocessors or FPGAs.Tying pin D+ to VCC configures the LTC2997 as an internal temperature sensor.The LTC2997 provides an additional 1.8V reference voltage output which can

4、 be used as an ADC reference input or for generating temperature threshold voltages to compare against the VPTAT output.The LTC2997 provides a precise and versatile micropower solution for accurate temperature sensing.LTC2997主要特性:Converts Remote Sensor or Internal Diode Temperature to Analog Voltage

5、±1 Remote Temperature Accuracy±1.5 Internal Temperature AccuracyBuilt-In Series Resistance Cancellation2.5V to 5.5V Supply Voltage1.8V Reference Voltage Output3.5ms VPTAT Update Time4mV/ Output Gain170A Quiescent CurrentAvailable in 6-Pin 2mm × 3mm DFN PackageLTC2997应用:Temperature Mea

6、surementRemote Temperature MeasurementEnvironmental MonitoringSystem Thermal ControlDesktop and Notebook ComputersNetwork Servers图1. LTC2997方框图ALPS ADI IR JRC/NJR KEC OTAX Seoul Semiconductor TI Walsin Technology图2. LTC2997单个遥控温度传感器应用框图图3. LTC2997内部温度传感器应用框图图4. LTC2997遥控CPU温度传感器应用框图图5. LTC2997单线遥控温度传感器应用框图图6. LTC2997输出噪音滤波器电路图图7. LTC2997长距离遥控温度传感器应用框图AO-Electronics 傲壹电子 官网： 中文网：图8