温度测量ADI

简介：

问：热电耦的冷端如何进行补偿?
答： You can use semiconductor temp sensor as the cold-junction conpensation. TMP35 can be used. for detailsm please mail china.support@analog.com

问：在100度到250度的测量范围使用NTC怎样保证2度左右的精度？
答： For this temperature range, you need to choose RTC or thermocouple. For thermocouple, you can use AD594/595, and for RTD, you can use AD694.

问：NTC和PTC在實際應用中有何區別
答： NTC and PTC are only different at the coefficient direction of sensors. What you need to consider is mainly the accuracy/linearity, temperature range and other specs when you choose sensors, but not PTC/NTC as first. For example, Thermocouple is with high

问：如果传感器在100米深井中，信号如何驱动？能否给出典型电路
答： I will suggest you to use the signal conditioner like OP-Amps in the front with the sensor. And, you can use 4-20mA loop or differential driver to drive the cable. Please contact our local sales office for more details.

问：何为PTAT电路?如何实现?
答： Please refer to the following web site for more details. http://www.analog.com/library/analogDialogue/archives/32-1/xfet.html

问：测量部分如ADC,DAC和基准电压的温漂如何进行处理和补偿?对1度的测量精度,温漂应要达到多少比较合适?
答： You have to use the voltage reference with the drift that can meet your requirement. For the 1 degree accuracy, the drift should not over 0.5 degree in the temp range you want to measure.

问：Can I adjust the average time  of the semiconduct sensor through the bus 
答： You can use the I2C/SMBus clock to adjust the read out speed on our temperature sensor.

问：演示中的温度测量都是低温(小于150度C的),其测量部分可否与热电耦连起来测量较高的温度如300度C以上?
答： When use the thermocouple, you cannot connect it to the semiconductor temp sensors. You can use our AD594/5/6/7 to implement the signal conditioning.

问：请解释一下SMBUS！
答： SMBUS: a 2 wire serial bus interface, similar with IIC, But SMBUS support interrupt function(additional pin), And SMBUS 2.0 support danymic address assign to slave device. All most ADI digital output temprature sensor support SMBUS. you can use software si

问：Although ADN8830 can control the TE.But in your presentation, you said the IC sensor can control the wavelength.I mean how to use the ADT7301 to control the wavelength. Thanks!
答： You have to use the AD7301 on the chamber to get the temperature and pass it to the ADN8830 for the wavelength lock-on. More details information please contact our local sales office of call the application center@ 800-810-1742.