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LM833: LM883 Saturation

Christopher Cuccia
Prodigy 150 points
Part Number: LM833
Other Parts Discussed in Thread: LMC6482, OPA1688, OPA2134

Dear Engineers,

Can the LM833 be driven continuously into Ground saturation without phase reversal given that current is limited into its pins. I have a circuit where I need an opamp that can function like this way past its negative common mode much like the lmc6482 can operate but I need it so that it can operate with a supply of max +36V in its parameters.

Chris

  • 0
    TI__Guru* 93105 points

    Hi Chris,

    I have studied the LM833 front-end design and it employs a conventional PNP differential pair, with NPN dynamic load transistors connected to the negative supply rail. There isn't any anti-phase reversal circuitry. Therefore, no assurances can be made that the output won't phase invert should the input level move beyond the specified input common-mode voltage range.

    I suggest you take a look at the OPA1688 audio op amp which will handle the +36 V supply, has very low THD, and has built-in anti-phase reversal protection.

    www.ti.com/.../opa1688.pdf

    Regards, Thomas

    Precision Amplifiers Applications Engineering

  • 0 in reply to Thomas Kuehl
    Prodigy 150 points

    That is great however, question, do you have a through-hole alternative since the product is built on through hole technology in its assembly process?

    Chris

  • 0 in reply to Christopher Cuccia
    TI__Guru* 93105 points

    Hello Chris,

    Our most modern operational amplifier products are not available in the legacy, DIP package. The OPA2134 is a very high-performance, FET-input audio operational amplifier, is available in the 8-pin DIP package, and can be applied in a single +36 V (max) application providing the input common-mode and output swing ranges are observed in relation to V- which would be at ground potential (0 V). It features anti-phase reversal circuitry as well.

    You can view the OPA2134 datasheet here:

    www.ti.com/.../opa2134.pdf

    Regards, Thomas

    Precision Amplifiers Applications Engineering