AD7745是AD公司生产的具有I^2C总线接口的电容数字转换器。该转换器支持单端电容输入和差分式电容输入,同时在片内集成了温度传感器,可以用于代替系统中的温度传感器。该芯片广泛的应用于生化探测、压力探测、电压探测、杂质探测等领域。介绍AD7745的功能原理和工作模式,同时给出一种使用该芯片的实际应用。
The AD7745 is a capacitance to digital converter with I^2C bus produced by AD Company. This converter supports single-ended capacitive input and differential capacitive input,and integrates a temperature sensor which can instead of temperature sensor in system. This chip is used in biochemistry detection, pressure detection, voltage detection and impurity detection. The principle and working mode are produced in the paper and an application with this chip is given.