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Difference Amplifier

eli
Guru 13485 points
Other Parts Discussed in Thread: INA149, INA157, INA133

Looking for similar Diff. Amp. like INA149 but with higher BW of 1.5M

  • 0
    TI__Mastermind 25775 points

    Hello eli,

    We have a few difference amplifiers that have 1.5 MHz or greater bandwidth. In order to point you in the right direction, though, we need more information. Can you please answer the following questions?

    a) What is the application?
    b) What are your available supply voltages?
    c) What gain is required?
    d) What do you like about the INA149 (e.g. common-mode voltage range)?

  • 0 in reply to Pete%20Semig
    Guru 13485 points

    Hi,

    See attached schematics, Its started after my proposal to use INA149 as a recommended replacement to ADI, AD629:

    a) What is the application?  sampling current flow between input pins
    b) What are your available supply voltages? ] +/-15VDC
    c) What gain is required?  X1

    2335.ADCOM.docx

  • 0 in reply to eli
    TI__Mastermind 25775 points

    Hello eli,

    I recommend looking at the INA133/4. You may want to increase the positive supply voltage, though, because you'll be operating on the typical 'edge' of the common-mode voltage. Alternately you could consider the INA157 and gain/attenuate externally to make up for the non-unity gain.