Quad single supply opamps that can handle negative input voltages

HighTechPower

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Hi guys. I have to make a circuit utilizing a quad single supply opamp which can handle negative input voltages at least up to -12V. Any idea which easily available quad opamp supports this function. The supply voltage is +15V (pin4), 0V (pin11).
 

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I want to find an opamp which has better performance than LM324 if offset is applied. Will MC34074 fulfill that purpose?
 

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HighTechPower said:
I want to find an opamp which has better performance than LM324 if offset is applied. Will MC34074 fulfill that purpose?
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My preference is the TLV9154, a low-cost, rail-rail input and output op amp with good frequency response, slew-rate, and low input offset voltage.
It's CMOS so the output can generally go closer the the rail voltages than BJT types such as the MC34074.
It does have a 16V max supply voltage, so should be okay with a 15V supply.

Example circuit below using that op amp to convert the difference of the negative input voltages to the output voltage difference (here with a gain of 2).
(Of course V2 has be more negative than V1 for the output voltage to be positive.)

 
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HighTechPower said:
I want to find an opamp which has better performance than LM324
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Hi,

how do you specify "performance"?
There is no such thing as "OPAMP performance"

Do a search on your LM324 (or any other electronics device) datasheet whether it specifies "performance".

The OPAMP datasheet specifies a lot of different values and it´s your job to decide which one is important for your application and to set the limits.

Klaus
 

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