LM311 - Doubts over specs

h8null · Mar 23, 2008

This is what is given in the datasheet of LM311.

"They are also designed to
operate over a wider range of supply voltages: from standard
±15V op amp supplies down to the single 5V supply used for
IC logic."

I want to know if LM311 is capable of working with a +12V supply alone. Actually it seemed to be working fine in the circuit i made. I want to know the reason behind this. Help please?

Torben · Mar 23, 2008

h8null said:
This is what is given in the datasheet of LM311.

"They are also designed to
operate over a wider range of supply voltages: from standard
±15V op amp supplies down to the single 5V supply used for
IC logic."

I want to know if LM311 is capable of working with a +12V supply alone. Actually it seemed to be working fine in the circuit i made. I want to know the reason behind this. Help please?

According to the datasheet it should be fine. It will work with at least a 5V difference between the positive and negative voltage supplies, and can survive at most a difference of 30V between the positive and negative supplies (i.e. +-15V dual supplies). So 12V single-supply should be just fine.

Torben

Papabravo · Mar 24, 2008

Do pay close attention the the parameter called "Common Mode Range". It basically tells you what range your inputs are restricted to for proper operation given the values of the supply voltages. For 12V single supply operation I would make sure the inputs are restricted to [0V..10V]. You may be able to get away with one of the inputs going to the rail, but don't let both of them get there at the same time.

LM311 - Doubts over specs

h8null

New Member

Torben

Well-Known Member

Papabravo

Well-Known Member

Similar threads

LM311 - Doubts over specs

h8null

New Member

Torben

Well-Known Member

Papabravo

Well-Known Member

Similar threads

Privacy & Transparency

Privacy & Transparency