Microphone and PreAmp Design Help

Hi there,



This is my first question on EngineerZone. I am an electronics engineering student.



I'm starting to work on audio preamp for a microphone.



This device will be placed in an open-field such as farms or jungles, to record an audio signal and perform some tasks.



Q1- I need a microphone that can sense far-field audio signals as well. How can I select it? Would mems audio microphone would be better option?



Q2- I need to build a preamp for this microphone, shall i build preamp with discrete components (transistor, opamps, etc) or get ADI's  preamp IC such as ssm2019? What ADI preamp IC's would you suggest for this application? I would prefer Through-hole IC if possible.



Kindly answer asap, as I cannot start until i get some information.






Zain Ireland

  • Hi Zain,

          You may want to have a look at ADI application note AN-1165, in which the choosing of op amps for a preamp of MEMS microphones is discussed.

          For me it is better to start with existing preamp ICs if all requirements are well reached, however, if the noise/bandwidth/power requirements are not very stringnent, a system built by op amps and resistor and capacitors is also fine.

  • 0
    •  Analog Employees 
    on Aug 2, 2018 3:11 PM
    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
    EZ Admin