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PLC 之DA输出电路方案

Other Parts Discussed in Thread: DAC7718

请问:

 PLC需要一个DA输出接口,提供0~10V的电压信号控制变频。感觉可以采用2种方式:

1) 利用一个DAC转换器,直接输出0~10V信号,再加一级跟随器;

2) 利用一个DAC转换器,输出0~5V信号,后跟一级运放进行2倍放大到0~10V,再加一级跟随器;