该器件有三种版本，各版本的模拟输入范围不同。
The part is offered in three versions with different analog input ranges.
现将一个未知的模拟输入信号同一个假定值进行比较。
Let us compare our unknown analog input signal to a "guess".
可以通过跳线接入外部的模拟输入设备到本设备的数字接口中。
They can be connected to Analogue inputs by jumper wires to provide additional digital connections on the digital inputs interface.
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