This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

关于4-20ma的设计

Other Parts Discussed in Thread: XTR117

需求仪表信号传送,4-20ma的方案。其精度要求0.5左右。 考虑用DAC直接输出4-20ma的芯片,稳定,但是价格高。 考虑过用UI转换芯片,U用51输出PWM来控制,但是PWM滤波之后 是否能到达到0.5的要求?暂定3线制,如有两线制方案更好。谢谢。