XTR108 是一個(gè)完整的可編程的4～20 mA 兩線制變送器芯片,其最大特點(diǎn)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(jī)上的軟件界面,經(jīng)基于單片機(jī)組成的標(biāo)準(zhǔn)串行數(shù)字接口部件,即可對模擬信號(hào)路徑進(jìn)行數(shù)字校零校滿,對傳感器的非線性誤差可方便地進(jìn)行數(shù)字化補(bǔ)償。簡要介紹了XTR108 芯片的特性、內(nèi)部結(jié)構(gòu)及其工作原理,對XTR108 在鉑電阻溫度變送器的應(yīng)用及數(shù)字校正方法進(jìn)行了介紹,并給出了軟件設(shè)計(jì)流程圖及用軟件模擬SPI 總線時(shí)
序?qū)TR108 執(zhí)行寫操作的程序。
關(guān)鍵詞:SPI 數(shù)字串行接口;二線制變送器;非易失性EEPROM存儲(chǔ)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