• 06-06-2017, 02:00 AM
    spring
    1 Attachment(s)
    Designing microphone preamplifier using MAX4468
    I am designing microphone preamplifier using MAX4468(MAX4468EKA - MAXIM - Linear - Amplifiers - Audio - Kynix Semiconductor) , but the reference diagram shows output from microphone (microphone input) going to both inverting and non-inverting terminals of the device. (picture attached below). Non-inverting terminal should be connected to ground or both non-inverting and inverting terminal should be given microphone input.
    The datasheet describes a point: The MAX4466/MAX4468 are decompensated for a minimum stable gain of +5V/V.
    Does it means that opamp will provide inherent gain of 5, irrespective of feedback resistors.(Page 1 of datasheet)
    Attachment 10038