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Swing voltage on Daul power supply OPA

I would like to know the real characteristics of  the output voltage offset of OPA.

What are the different between the dual supply power OPA VSS = -VCC and VSS = ground ?

Assume OPA's Vin = 25mV, VoL=40mV  and used unity gain buffer.

If I used the dual supply OPA , and connect the Vss to negative voltage ( -0.1V ), the lowest output voltage of OPA will be 25mV  or  40mV?  



  • 这里表格的电气参数的意思是: 最大输出swing 根据负载的不同有两种,第一种输出范围为Vss+15mV~VDD-20mV。
    因此假如5V单电源供电的话,输出即为15mV~4.98V。 如果+-3.3V供电的话,那么输出范围为-3.3V+0.015V~3.3V-0.02V。
    5Kohm负载也是如此。 可以看出这是一款轨至轨输出的运放。
  • Dear Kailyn Chen ,

    雙電源+-3.3V供电的话,那么输出范围为-3.3V+0.015V~3.3V-0.02V這個區間,代表我有機會讓我的OPA輸出電壓最在0V嗎?

    因為單電源存在一個15mV的擺幅電壓在,我希望我的輸出電壓能在15mV以下的話,使用雙電源是否行得通?