UCC21750的AIN模拟采集引脚的电压范围0.6V~4.5V,内置电流源200uA,换算出可以采集的电阻值为3k~22.5k,而一般NTC的阻值变化范围0~120k,那要采集22.5k以上的电阻值应该怎么设计?因为超过22.5k时,AIN电压已经超过极限值4.5v。
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