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OPA1622: Supply Voltage

Frank Mancuso
Prodigy 70 points
Part Number: OPA1622

I have built a high-performance audio DAC using the OPA1622. I used +/-15 volts to power the op-amps. I can't seem to find any data in the OPA1622 datasheet that discusses the performance of these op-amps with different supply voltages.

I am considering lowering the +/- supply rails but I would like to know what the impact will be on performance. I am looking to achieve the best performance possible. Can you please provide some app notes or guidance on the performance of these op-amps with different supply voltages?

Thanks in advance.

  • 0
    TI__Expert 6380 points

    Hi Frank,

    As you can see in the electrical characteristic table of the OPA1622 data sheet, its specs are defined in +/-2V - +/-18V.
    Considering with this table, you can use OPA1622 with lower supply voltage than +/-15V.

    Regarding the limitation of opamps with respect to the supply voltage, please refer to the TI precision labs in the below link.

    If you will use OPA1622 in non-inverting configuration, especially please check the common mode voltage range of your application and the expected output voltage swing, since it is related to audio performance such as THD.

    Best regards,
    Iwata Etsuji