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OPA1688: Input rail to rail

Yusuke Mukuno
Expert 7395 points
Part Number: OPA1688
Other Parts Discussed in Thread: OPA1642, , NE5532, OPA1656

Hi expert,

Device : OPA1688 and OPA1642

Can you provide any figure to show the input rail to rail when single supply use case like as following figure(NE5532)?

Also, could you please let me know other recommended devices for input rail to rail that can support around 0V input?

Conditions : +12V (single supply)

offset : +1.65V

Use case : Audio amp

Channel# : 2ch

Low noise

Thanks

Muk

  • 0
    TI__Expert 6400 points

    Hi Mukuno-san,

    If you would like to know the linearity of OPA1688/42 around negative rail input in the non-inverting amplifier configuration, you can refer to the fig.4 of OPA1688 datasheet.

    Regarding the alternative device, I can recommend OPA1656 as the lower noise audio op-amp.

    Thank you and Best regards,
    Iwata Etsuji