Description: In practical application, and many times need to signal of the output voltage, electric current and so on, especially in the industrial control industry, 4-20 ma transformation often want to use, choose AD421 chip to do it, cost is high, if USES the single chip PWM output to the accuracy of the DA can do more than 14.
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如何实现低成本，高精度，高稳定性的DA输出.pdf
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