We have just published a new application note titled "Op Amps for MEMS Microphone Preamp Circuits." AN-1165 covers some of the key op amp specifications to consider in a preamp design, shows a few basic circuits, and provides a table of Analog Devices, Inc., op amps that may be
appropriate for a preamp design.
I hope that this app note is useful for your MEMS microphone designs. Feel free to discuss this further here.