Hi

I am looking at a selection of TDK MEMS PDM microphones, there are some available in 1.8V, this would mean we would need level translation circuits.

Is there any advantage of using 1.8V versions?

 

As it's an AC signal the level translation required is just a capacitor.
I'd use a microphone with the same power supply as the rest of my logic.

 

So my ESP32 is working on 3.3V and the MEMS PDM is working on 1.8V.

The ESP32 is providing a CLK and receiving the DATA.

So how can I do a level translation for this?

 

Sorry - I thought it was an analogue microphone.
I'd still recommend using a microphone with the same power supply as the rest of logic.
Whilst an analogue microphone could be connected with just a capacitor, a PDM logic-output device could be interfaced with something like a 74LVC07

 

Thanks, Ok I will select something running on 3.3V.

I thought there was some type of advantage of using 1.8V

 

So how can I do a level translation for this?

Perhaps one of these would suit?