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Associate III
Jun 14, 2025 5:21 AM UTC
Solved

stereo recording with 2 MEMS mics... Capturing both channels Configuration

Hello everyone, 

I was trying to use 2 mics  IMP34DT05 in stereo configuration with MCU.I wanted to capture signals from both the mics as well as i want to use single mic also. Please guide how can be this configuration done in schematic and how should be the 2 mics placed together.

 

Best Regards,

Sakshi 

This topic has been closed for replies.
QSHAO.1
QSHAO.1Best answer
ST Employee
Jul 1, 2025 9:29 AM UTC

Except power and GND pins, you may need to 

1. connect CLK pin3 of two mics together and connect them to MCU CLK output pin.

2. connect LR pin2 of first mic to GND while LR pin2 of second mics connected to VDD.

3. connect DOUT pin4 of two mics to two Din pins of MCU, normally MDF (Multi-function digital filter) interface.

thanks!

2 replies

QSHAO.1
QSHAO.1Best answer
ST Employee
Jul 1, 2025 9:29 AM UTC

Except power and GND pins, you may need to 

1. connect CLK pin3 of two mics together and connect them to MCU CLK output pin.

2. connect LR pin2 of first mic to GND while LR pin2 of second mics connected to VDD.

3. connect DOUT pin4 of two mics to two Din pins of MCU, normally MDF (Multi-function digital filter) interface.

thanks!

sakshiAuthor
Associate III
Jul 5, 2025 6:04 AM UTC

Hello @QSHAO.1 ,

Thankyou for the reply.

I would look into this solution.

 

Thanks & Best Regards,

Sakshi