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作者：Ansifa
鏈接：https://www.zhihu.com/question/29562165/answer/44822735
來源：知乎
著作權(quán)歸作者所有。商業(yè)轉(zhuǎn)載請聯(lián)系作者獲得授權(quán)，非商業(yè)轉(zhuǎn)載請注明出處。
LM75A就很好，11bit精度，iic的協(xié)議，不到一塊錢的價格，采樣時間比18b20低很多————————————LM75A:高速I2C總線接口，有A2-A0地址線，一條總線上最多可同時使用8個LM75A；低功耗設(shè)計，工作電流典型值為250uA，掉電模式為3.5uA；測量的溫度最大范圍為-55℃～+125℃；寬工作電壓范圍：2.8V～5.5V；提供了良好的溫度精度（0.125℃）；可編程溫度閾值和滯后設(shè)定點(diǎn)�！賮硪粋�13bit的DS1624也是IIC協(xié)議的，13bit，測量精度0.03125°C，大概三四塊的價格FEATURES Temperature measurements require no external components Measures temperatures from -55°C to +125°C in 0.03125°C increments. Fahrenheit equivalent is -67°F to +257°F in 0.05625°F increments Temperature is read as a 13-bit value (two byte transfer) Converts temperature to digital word in 1 second (max) 256 bytes of E2 memory on board for storing information such as frequency compensation coefficients Data is read from/written via a 2-wire serial interface (open drain I/O lines) |
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