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Hello, I cannot understand what information does the following graph convey. Can someone explain this please?

LM358N Datasheet Download

What information does the Input Voltage Range Graph from LMN Datasheet conveys In my view it’s a confused way to visualize the input common mode range specification in the electrical characteristics table. I must confess that the diagram, which can be also found with slightly different annotation in the original National datasheet, didn’t bother me datasehet I was using the part during the last 35 years or so. I am using it to sense very low voltages in a non inverting configuration with a gain of 67 or so I need to understand the graph What information does the Input Voltage Range Graph from LMN Datasheet conveys As I already said, all necessary information is in the common mode range specification, which is apparently less xatasheet.

You should describe your application problem if you have difficulties to relate it to the datasheet specification. It will usually remain even below that 75 mV value which is quite near the ground and the diagram is also a bit complicated so I cannot conclude whether the device would be able to sense an input this low or not?


What information does the Input Voltage Range Graph from LMN Datasheet conveys The input common mode range of LM includes the negative ground rail, in so far it has no problems to amplify the small input voltage correctly.

LMN Datasheet pdf – Dual Operational Amplifier – Fairchild Semiconductor

The minimal sensed voltage will be however restricted by the output voltage range of the first datahseet. You achieve better performance if you omit the first amplifier stage and connect datasyeet shunt voltage directly to the gain stage.

What information does the Input Voltage Range Graph from LMN Datasheet conveys Can you please ellaborate how the output range of first amplifier would restrict the minimal sensed voltage? It is just a voltage follower km358n the same package LMN dual op amp which I have added so that there would be high input impedance that would not disturb the main circuit Last edited by muhibraza; 10th March at You have to refer to datasheet detail specifications instead of reading a specification into the first datasheet page.

I must confess, that I don’t exactly remember what’s the typical minimal output voltage without a load is. Because it’s bipolar technology, you can expect a few mV saturation voltage.

A few mV output voltage is considered as “zero” in single-supply OP terminology, but it probably isn’t zero enough for a mV buffer amplifier.


I’ll remove the follower and let you know the result then Input voltage range of Op-amp 6. MC Input voltage — which voltage to use when targeting a range. How to detect the range of input voltage? Part and Inventory Search.

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