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INA103: INA103 Instrumentation Amplifier for AC Applications

Nicholas Kunst91
Prodigy 20 points
Part Number: INA103
Other Parts Discussed in Thread: INA110, INA116, INA826, INA111, , INA217, INA128

Hello, I am looking for advice for choosing the best amplifier that is to be connected to a Wheatstone Bridge that is supplied with an AC source. I am currently using an INA110 instrumentation amplifier connected to the bridge but it is currently supplied with a DC source. I was wondering if it is possible for this set-up to run the bridge with an AC source? and also, which amplifier would be better, as we are trying to obtain a gain of 10 and run a frequency of 100-300kHz through the amp. Any suggestions are welcomed, thank you! 

  • 0
    TI__Guru 61340 points

    Nicholas,
    I believe INA110, INA111, INA116, and INA128 have sufficient bandwidth in gain of 10 for your application while INA103, INA217, INA826 may have the required speed but may not be best suited for bridge application because of their relatively high input bias current.