When 8 pcs I2S deivce connected to 1701

The ADAU1701's serial port pin drivers were only designed to drive one or two external ICs. It might be possible to have it drive 8 external microphones, but that depends greatly on the PCB design (trace length, layout, line termination...). I anticipate that the 3 MHz BCLK signal coming out of the ADAU1701 will probably have signal integrity issues when trying to drive 8 slaves. You will probably need to use some kind of external buffer IC in order to drive all of those microphones.

Noted with thanks.

In my product, 1701 will drive 7 I2S devices, include itself(LRCLK output to LRCLK input). Is there a suitable p/n of buffer IC from ADI?

BR,

Jackie

Hi Brett,

I'm asking ADI China for help on buffer IC. No need to do this by you. Thank you for your help.

Regards,

Jackie

Thanks, Jackie! Please let us know if you find a suitable buffer IC.