What does amplifier rail to rail I/O capabilities mean ?

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Karim AbdelMoneim

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Rail to rail I/O

What is the meaning of an amplifier having Input and Output rail to rail capabilities ??

thanks....
 

Re: Rail to rail I/O

Karim AbdelMoneim,
It means that the amplifier output is capable of going to an output equal to (or nearly equal to) the power supply voltages. The power supply connections are sometimes refered to as "rails".
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As far as the input is concerned, it means that the common mode input voltage range includes the power supply voltages. You must be careful with "specmanship", however. The common mode rejection ratio (CMRR) is usually specified over a limited common mode input voltage range.
Regards,
Kral
 
Re: Rail to rail I/O

Thanks Kral, that's was of great help for me, thanks a lot .
 

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