Other Parts Discussed in Thread: TLV1805
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![DATESHEET](/resized-image/__size/640x480/__key/communityserver-discussions-components-files/52/0_5B00_X_4000_1EB_5F00_DHA3HOF_7D00_2GCJA_5D00_G.png)
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您好,
反向输入端 3脚,您是打算接直流电压2.5V是吗?接直流电压2.5V需短接C1,因为电容隔直,比较器的3脚相当于浮空。
您使用的参数与datasheet中的一致,因此两翻转阈值也一致,可以看出一个阈值是1.675V,一个是3.325V,也就是说输入从低电平变化到3.325V时,输出才有低变高电平,但是您的输入最大才3.3V,因此输出是不能切换到高电平的,因此您需要改变设置的迟滞电压,或增加输入电压。
datasheet 7.4.1.2部分也给出了两翻转阈值的计算公式,如下截图所示: