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OPA365: OP365

Saad Thabit49
Prodigy 100 points
Part Number: OPA365
Greeting
I have a question about OPA365, I'm a bit  confused from the datasheet
on page 12 from the datasheet it suggests OPA365 to provide superior common-mode performance over the entire input range, which extends 100 mV beyond both power-supply rails
I'm using 0 to 5V supply, is that mean the common mode voltage range is -0.1V to 5.1V. does that mean no need to account for headroom? with 0-5V what will be output swing?
Thank you for your help in advance 
  • 0
    Guru 140200 points

    Hi Saad,

    yes, this is an input and output rail-to-rail OPAmp. An important specification is the common mode rejection ratio. This specification tells what common mode input voltage can actually be handled by the OPAmp in linear operation. And the OPA365 has brilliant data:

    The following picture shows, that the output voltage swing of OPA365 is within 10 mV of the rails:

    For other output loads than 10k see figures 7, 8 and 9 of datasheet.

    Kai

  • 0
    TI__Genius 15565 points

    Hello Saad,

    This is correct, the common mode input range exceeds the supply rails of the device as shown in the datasheet. The device also has a rail-to-rail output with a typical swing of 10mV away of from each rail and a maximum of 20mV. In your case the output range would be from 0.01V to 4.99V.

    Best,

    Hasan Babiker