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TLC4545做差分应用时 Ain-电压范围-0.2-+0.2如何理解?

Other Parts Discussed in Thread: TLC4545
 tlc4545作差分应用时AIN-的电压范围?手册上标注的是-0.2V~+0.2V,是实际值还是GND-0.2V~VDD+0.2V?如果实际电压范围-0.2V~+0.2V有什么适用价值?