This Dual Rail-to-Rail opamp :

I implemented a circuit with this dual rail-to-rail opamp on a breadboard and used a ±15V dual supply. The outputs saturate either to negative or positive rail which I'm not expecting as outputs. In simulation everything works fine but in real I checked the wirings ten times I couldn't find the problem.

My question is regarding the following absolute max ratings for the power rails: enter image description here

Does 16V above mean that the max supply rail for the opamp is

Vcc<16 and |Vee|<16V?

As I mentioned I use +15V for Vcc and -15V for the Vee. Am I exceeding limits?


1 Answer 1


Yep, you're exceeding them. Notice how it says

Supply voltage (V+ - V-) MAX: 16V

this means that the total voltage difference between V+ and V- cannot exceed 16V, whereas your supply of +/-15V has a total difference of 30V. Time to buy a new op amp.

  • \$\begingroup\$ It is exposed to this 30V differential voltage one hour:( \$\endgroup\$
    – cm64
    Apr 3, 2018 at 15:39
  • 2
    \$\begingroup\$ Time exposed is irrelevant. Once you break datasheet specifications, operation (or lack thereof) is undefined. \$\endgroup\$ Apr 3, 2018 at 16:20
  • \$\begingroup\$ Indeed, especially if you exceed it by 15V. \$\endgroup\$
    – C_Elegans
    Apr 3, 2018 at 16:24

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