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OPA189: need help provide GBW test method and test parameters

Haiwen Huang
Intellectual 2190 points
Part Number: OPA189

Tool/software:

Dears:

Customer want to test OPA189 GBW, but test condition is blank. Could you please help provide test method and detailed test parameters to customer ? Thanks.

  • 0
    TI__Mastermind 24468 points

    Haiwen,

    The test conditions for the entire specification table is listed at the top of the table.  Thus the conditions for the OPA189 test are: T = 25C, Vs = ±18V, Vcm = Vout = Vs/2 = 0V., and RLoad = 10k and is connected to Vs/2 (0V in this case).  The test conditions listed next to the specification are exceptions or in addition to the test conditions at the top of the table.  In this  case the condition Av = 1 is in addition to the conditions at the top of the table.  Thus, a buffer configuration is used  and the input sinusoidal signal is swept until the output drops to -3dB or 0.707V/V.

    Best regards, Art

  • 0 in reply to Art Kay
    TI__Intellectual 2190 points

    Hi Ark:

    Thanks for introduce test information.

    About test signal , Do we have frequency ,amplitude or other requirement ? 

    As customer use 50mV  signal  and +/- 15V power to  test OPA189 GBW, test result is around 9M, So I want to know the different. 

  • +1 in reply to Haiwen Huang
    TI__Mastermind 24468 points

    Haiwen,

    The signal should be less that 100mV to avoid slew limitations.  The frequency is swept until the -3dB attenuation is achieved.  That is you look for the frequency where the gain drops by 0.707 V/V

    Art