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THS4131: Performance difference between Single rail power supply and dual rail power supply

Takashi Onawa
Genius 13200 points

Part Number: THS4131
Other Parts Discussed in Thread: THS4141, THS4151

Hi team,

My customer want to know if there is any performance difference between single rail power supply and dual rail power supply. Then I have some quick questions.

1. Could you tell me which performance will be degraded in single rail power supply case on THS4131?As far as I quickly check that, it looks THD performance is a little bit degraded on THS4131 2. though, Is this unique behavior of this device or general behavior?

It's welcome if you have any recommended device which shows similar performance in both supply case and P2P of THS4131.

Regards,

Takashi Onawa

  • +1
    TI__Mastermind 23226 points

    Hi Takashi,

    No, there is no performance difference. If all node voltages in the circuit are shifted equally, the operation must be exactly the same. Voltage is just a measure of electrostatic potential between two points, and an amplifier will not know the difference between a 0V and 10V supply and a -5V to 5V supply, until it is attached to an external voltage by its load or gain resistors.

    The THS4131 is a good high voltage, high output current FDA. Similar devices with higher bandwidth are the THS4141 and the THS4151.

    Best regards,

    Sean

  • 0 in reply to Sean Cashin
    TI__Genius 13200 points

    Hi Sean-san,

    Thanks, I understood.

    Regards,

    Takashi Onawa