通过官网参考电路电路图设计4-20ma电流环路输出,使用DAC8551和XTR116芯片,电路图如下:
现在通过SPI控制DAC8551输出电压VOUT能够正常变化,但是测量XTR116的VREF基准电压输出端电压为2.5V,电流输出端始终为电流输出最小值,并不随着DAC8551输出电压的变化而变化(PS:参考电路中给出的XTR116的VREF基准电压为4.096V)
请各位大神帮忙分析一下,是芯片出了问题,还是电路设计出了问题,非常感谢
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