The reference to 'real' bits was asking how low noise do you want to have? Noisy ADCs are cheaper than quiet ones. A true 24 bit ADC would have noise down around -140dB which is AFAIK unattainable with present day technology. Even if an ADC puts out 24bits, its very likely the bottom 4 bits at least will be essentially random noise.
If you say what source you're wishing to record I could perhaps home in a bit better on your requirements here.
If you say what source you're wishing to record I could perhaps home in a bit better on your requirements here.
This will probably foot the bill very nicely then :
PCM4222 Evaluation Module (EVM) - PCM4222EVM - TI Tool Folder
PCM4222 Evaluation Module (EVM) - PCM4222EVM - TI Tool Folder
You have frex CS5381 ADC but the PCM4222 seem to measure somewhat better.
http://www.diyaudio.com/forums/grou...1-analog-digital-converter-pcb-group-buy.html
http://www.diyaudio.com/forums/grou...1-analog-digital-converter-pcb-group-buy.html
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