#PCM1840

[adafruit]

PCM1840 Quad Input Microphone I2S ADC with Hardware Pin Configuration 🔊🎤🛠️

We looked up this chip in 2021, right before we got smacked with a chip shortage and couldn't get any to prototype with - but we're back in biz and respinning a prototype up. While looking up the TLV320ADC quad microphone I2S ADC, we also bumped into the PCM1840. These chips are similar (almost identical pinout) but have analog-only inputs and no I2C or SPI configuration. Yep, it's completely hardware pin bootstrapped, which makes setup much easier because you can use any I2S driver. It can act as an I2S controller (it clocks all I2S pins out) or the I2S peripheral (I2S clocks input and data is output). We whipped together a breakout to figure out how to get TDM I2S input working without dealing with the I2C setup. Looks awesome for spatial audio algorithms and voice recognition projects. You can pick up the PCM1840 ADC on DigiKey - lots are in stock!

[adafruit]

Desk of Ladyada - an audio extravaganza 🎧🔧🎤

New audio designs are in the pipeline, including work with TDK’s T5838 PDM mic and PCM1840/PCM1820 chips. Great Search is on for a low-cost, MCK-less I2S DAC to replace the discontinued UDA1334A, like the popular PCM5102A.

[adafruit]

PCM1820 no-firmware stereo analog to I2S ADC 🎶🔧📦

We scrubbed and reordered our PCM1840

breakout - yet another 2021-era leftover - and while we were at it, we also looked at the PCM1820

which is the 2-channel version. This could be very helpful for folks who want to convert an analog design to a digital one. A resident Adafruit'er recommended it for some customer use! We made a quick breakout. We are a huge fan of I2S converters that don't require any firmware / I2C configuration. This one is configured via jumpers, perfect for connecting to an SBC or digital audio path. Coming soon to the Adafruit shop!