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TLV9052: Question for TLV9052 voltage output swing from rail spec

Jacky Wang(QD)
Genius 9950 points
Part Number: TLV9052
Other Parts Discussed in Thread: TINA-TI

Hi Team,

Our customer wants to know the maximum voltage output swing from rail spec for TLV9052 for several hundred ohms load like 100~200ohm under 3.3V voltage, but from the datasheet, we only specified with 2kohm and 10kohm conditions, can you help to check what's the spec with 100~200ohm load under 3.3V voltage? Also, does TLV9052 can support maximum ~20mA load current for the output?

Thanks.

  • 0
    Guru 244020 points

    There are no guaranteed limits for these cases.

    It might be possible to estimate them from the typical values in figure 31.

    There are opamps with stronger outputs. What is the maximum voltage drop that can be afforded?

  • 0
    Guru 140200 points

    Hi Jacky,

    as the Spice model of TLV9052 is from 2019 I would run a TINA-TI simulation. Can you post a schematic?

    Keep in mind, that the data you show is only the output saturation voltage of TLV9052. An OPAmp will not work properly when hanging in output saturation, though. You should have a look at the "open-loop voltage gain" specification to see the output voltage range in which the TLV9052 is running linearily. The datasheet says that the output voltage should stay 150mV away from the supply rails for linear operation.

    Kai

  • 0 in reply to kai klaas69
    TI__Expert 8136 points

    Hi Jacky, 

    As Kai and Clemens have mentioned, more information would be helpful. 

    Both of the previous points mentioned are true regarding estimating typical output swing. 

    I am always happy to run a TINA simulation if the customer is willing to share the schematic + expected input signal. 

    Best,

    Jacob