TLV320ADCx140 4-Channel microphone I2S ADC 4-Channel microphone I2S ADC 🎤🔊🔧
We saw this TLV320 4-channel microphone ADC in an Echo Dot teardown
Teardown time with an Amazon Echo Dot 4th generation smart speaker, find out how Alexa is listening to you
and thought it looked like a handy I2S chip. You can have 4 PDM or analog microphones for input, and data comes out on a single stereo I2S channel with time division multiplexing. Four inputs are better than 2 when using microphones for voice array/location projects. This chip doesn't need MCLK, so it would probably work better with a Raspberry Pi! The chip comes in a few flavors, with 106, 120, or 122 dB SNR (you pay more for the 122!) TLV320ADC5140 (as used in the Echo Dot) is in stock at DigiKey
Order today, ships today. TLV320ADC5140IRTWR – ADC, Audio 768k I2C, SPI 24-WQFN (4x4) from Texas Instruments. Pricing and Availability on mi
and we'll probably use that one.