XTR108 是一個完整的可編程的4～20 mA 兩線制變送器芯片,其最大特點是允許用戶
數(shù)字化調(diào)節(jié)增益、偏移及線性化校正系數(shù)等。用戶通過主機上的軟件界面,經(jīng)基于單片機組成的標準串行數(shù)字接口部件,即可對模擬信號路徑進行數(shù)字校零校滿,對傳感器的非線性誤差可方便地進行數(shù)字化補償。簡要介紹了XTR108 芯片的特性、內(nèi)部結構及其工作原理,對XTR108 在鉑電阻溫度變送器的應用及數(shù)字校正方法進行了介紹,并給出了軟件設計流程圖及用軟件模擬SPI 總線時
序?qū)TR108 執(zhí)行寫操作的程序。
關鍵詞:SPI 數(shù)字串行接口;二線制變送器;非易失性EEPROM存儲器
Abstract :XTR108 is a complete programmable ,4 - 20mA ,two - wire current transmitter intergrated circuit . It al2 lows the user to digitally adjust the gain ,offset ,and linearity correction of the analog output to calibrate the sensor. Zero , span ,and linearization errors in the analog signal path can be calibrated via a standard digital serial interface based on mi2
crocontroller and through the virtual control panel on the PC. The sensor nonlinearity compensate is easy using digital tech2 nic. Introduces characteristic , structure and Theory of XTR108. and that application it is RTD Transmitters. And gives software design flow chart and program about SPI simulation timing using software what it is write to XTR108.
Key Words :SPI Digital Serial Interface ; Two - Wire Transmitter ;Non - Volatile EEPROM Store