I spotted this new quad 32 bit ADC on the TI site, less than 2USD
https://www.ti.com/product/PCM1841-Q1?jktype=homepageproduct
The performance at both full scale and -60 dB is remarkable, not that long ago something like this would have cost a fortune
https://www.ti.com/product/PCM1841-Q1?jktype=homepageproduct
The performance at both full scale and -60 dB is remarkable, not that long ago something like this would have cost a fortune
It's only worse than -100db at close to full scale output otherwise it's below 110db which is not too shabby.
ADCs are never as good as DACs. The performance of this one is very good, the IMD and the lack of distortion spurs at -60 dB is very good.
The PCB layout is going to be the limiting factor here.
The PCB layout is going to be the limiting factor here.
Considering it’s application of a mems microphone adc it’s pretty impressive bit of technology for the price.
The pcb layout looks straight forward considering they show you an example in fig 7.7 and also in the evaluation design. The Vqfn package are fun to hand solder 🙂
The pcb layout looks straight forward considering they show you an example in fig 7.7 and also in the evaluation design. The Vqfn package are fun to hand solder 🙂
A nice feature is that the different modes are pin selectable, so no need for an MCU. The dynamic range enhancer is basically a system that increases the gain for low level signals and uses calibration techniques to achieve a click free transition between gain steps. Similar techniques can be found in hearing aids. So the S/N is rather constant, but DR is increased. fits our ears.