Which pin is the ground in this low power dual op-amp " LM358N " ? thanks

[dineshdeshmuk]

Which pin is the ground in this low power dual op-amp " LM358N " ?

1. Output 1
2. Inverting Input 1
3. Non-inverting Input 1
4. Vcc -
5. Non-inverting Input 2
6. Inverting Input 2
7. Output 2
8. Vcc +

What should be the inverting input & non-inverting input for both the two op-amps ?

thanks

 

[vinodstanur]

Re: Which pin is the ground in this low power dual op-amp " LM358N " ? thanks

You can use Vcc- as ground if you are not using a dual voltage power supply..

---------- Post added at 21:55 ---------- Previous post was at 21:47 ----------

Or if you are using a dual voltage power supply and confused where to connect the ground in the IC, then just remember, no need to connect the ground any where in the IC.
We take O/P in between the ground and O/P pin. Also, we may connect the ground to the input pins directly or indirectly and/or may take ground as a reference to provide input, but all those depends on the circuit we design.....

 

[dineshdeshmuk]

Re: Which pin is the ground in this low power dual op-amp " LM358N " ? thanks

difference between non-inverting input & vcc +
&
between inverting input & vcc - ?

thanks

 

[alexxx]

Re: Which pin is the ground in this low power dual op-amp " LM358N " ? thanks

difference between non-inverting input & vcc +
&
between inverting input & vcc - ?

thanks

Vcc+ and Vcc- are positive and negative power supply pins. Non inverting and inverting inputs, are signal inputs (as their name imply).

 

[dineshdeshmuk]

Re: Which pin is the ground in this low power dual op-amp " LM358N " ? thanks

why inverting & non-inverting inputs are applied ?

what are their voltage ranges ?

thanks

 

[alexxx]

Re: Which pin is the ground in this low power dual op-amp " LM358N " ? thanks

why inverting & non-inverting inputs are applied ?

To produce the desired output.

what are their voltage ranges ?

According to datasheet −0.3V to +32V.
**broken link removed**

 

[dineshdeshmuk]

Re: Which pin is the ground in this low power dual op-amp " LM358N " ? thanks

so if we put -0.3 V then what would be the output ?

&

if we apply +32v then what would be the output ?

thanks

 

[alexxx]

Re: Which pin is the ground in this low power dual op-amp " LM358N " ? thanks

so if we put -0.3 V then what would be the output ?

&

if we apply +32v then what would be the output ?

thanks

First of all it is not good to push a device into its limits. Secondly, your question cannot be answered because there is a lack of data. An opamp can be configured in many topologies. So if you have two opamps with the exact same inputs, you could have different output because of the different topology. Then you could have same topology but different inputs, so the result would also change. If you are using feedback, then for same inputs and same topology you could again have different output, because of different feedback.

By following this thread, I concluded that your real question is "how does an opamp work".:smile: It is not bad, I am just telling you this so you can ask questions more effectively next time. There is no point on answering a question and then asking something different and then something different. Also this is against forum rules. Ask exactly what you want to get the exact answer you need. :wink:

Here is a reference to start with.
Operational amplifier - Wikipedia, the free encyclopedia

Read it carefully and if some parts are hard to understand, read it again and again until it gets clear. You can then come back and open a new thread, with a specific question on a part or parts you did not understand.
If you need more references, then google for "opamp", or if you need something specific (like let's say comparator) then google for "opamp comparator". Of course if there is any book available next to you, just open it!!! :-D

 

[vinodstanur]

Re: Which pin is the ground in this low power dual op-amp " LM358N " ? thanks

Exactly.....as alexxx said....
It is better to read some thing about OP AMP and there after your doubts will automatically become more specific....

You can also search in youtube for some video tutorials related to OP AMP....