What's the input resistance of ADA8691?

Hi,

I'm trying to connect the ADA8691 amplifier with ADMP411 microphone, but I can't find the input resistance of the amplifier. Thanks,

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  • 0
    •  Analog Employees 
    on Jul 29, 2013 11:15 PM

    Hi hulala,

    Because the AD8691 is a CMOS amplifier, it should have very high input impedance. I do not think there will be any problems with interfacing this to the ADMP411. I have communicated with the engineer of this part to try and see whether I can provide you a typical value of its input impedance. I'll get back to you on this. 

    Thanks!

    Kris

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  • 0
    •  Analog Employees 
    on Jul 29, 2013 11:15 PM

    Hi hulala,

    Because the AD8691 is a CMOS amplifier, it should have very high input impedance. I do not think there will be any problems with interfacing this to the ADMP411. I have communicated with the engineer of this part to try and see whether I can provide you a typical value of its input impedance. I'll get back to you on this. 

    Thanks!

    Kris

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