I have a problem choosing right opamp to amplify signal from 10KHz-65KHz mic SPM0204UD5. According to microphone's datasheet, it has max output impedance of 300Ω, and supply voltage from 1.5 to 3.6 V.
Datasheet also has recommended interface circuit as follows:
More precisely, my question is: should I use voltage divider to get 3.6v max on the mic? Can opamp be connected with single-supply or do I need two (and thus 2 voltage dividers to put the mic "around" the Vref, or just up the ground)? Of course, I'd preferred single supply.
Are there single-supply opamps for 3.6v? (I have not found), which are capable to amplify up to 65kHz signals?
I guess, there is some implicit knowledge required to interface the mic.
The output will be some circuit, which will convert part of the bandwidth to audible domain or maybe just measuring the volume. Actually, at first I just want to check if the device work in the audible range, covered by the mic (10KHz-20kHz).
UPDATE: I get it to work with Vcc=3.3v, C1=10uF, R1=1k, R2=100k, Vref obtained by voltage divider with 100k and 100k resistors to Vcc and ground, Load 820 ohm to the ground. U1 - LM4562 device. Pls note, that pin numbers on schematic are different ones than LM4562 uses.