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OPA211: OPA2111

Lucas Pucheta
Expert 4731 points
Part Number: OPA211
Other Parts Discussed in Thread: TINA-TI

Hello All,

Why is there a mismatch between my data sheet and the simulated results? On the data sheet plot I have shown where by expected bandwidth is given a gain of 40dB. In TINA-TI simulation, the actual bandwidth is much lower for the OPA2111.

data sheet: www.ti.com/.../opa2211a.pdf

Thank you,

Lucas Pucheta

  • +1
    TI__Guru* 93105 points

    Hello Lucas,

    It  looks like that you used an old OPA2111 model (obsolete product) in place of the modern OPA2211 model you likely intended to use for the simulation. If you apply the correct OPA2211 model the gain vs frequency plot (G = 100 V/V) will produce a unity gain crossover frequency very close to that in the datasheet Figure 9 open-loop gain vs frequency plot.

    Regards, Thomas

    Precision Amplifiers Applications Engineering