Linear LTC2997高精度模拟输出温度检测和遥控方案

2011年07月19日 13:53 发布者：Liming

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 Temperature Sensor

The 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 LTC2997 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 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

±1℃ Remote Temperature Accuracy

±1.5℃ Internal Temperature Accuracy

Built-In Series Resistance Cancellation

2.5V to 5.5V Supply Voltage

1.8V Reference Voltage Output

3.5ms VPTAT Update Time

4mV/℃ Output Gain

170μA Quiescent Current

Available in 6-Pin 2mm × 3mm DFN Package

LTC2997应用:

Temperature Measurement

Remote Temperature Measurement

Environmental Monitoring

System Thermal Control

Desktop and Notebook Computers

Network Servers