Hello all!
How fast are the fastest pure PCM-DACs,
for 8 Bit, 12 Bit, 16 Bit, 20 Bit, 24 Bit?
Oliver
How fast are the fastest pure PCM-DACs,
for 8 Bit, 12 Bit, 16 Bit, 20 Bit, 24 Bit?
Oliver
Are these AD beasts all pure PCM?
And is highspeed >16bit not possible, or is there just no market?
And is highspeed >16bit not possible, or is there just no market?
I used to check if TI wantsto release some new r2r with SiCr thin film and I out , but nothing yet.
The PCM1704 and the WM8740 (and probably others) have 8xFs modes for use with an external digital filter. In 8x mode they accept 768kHz sample rate, 24-bit samples. Neither chip is upsampling in this mode; that is assumed to have been done by the external filter, like the DF1704.
I remember the Wadia Power DAC that reached 2.8Mhz with eight of them driven phase-shifted many years ago. Any progress so far? And what about ADCs?
pcm63 is segmented dac, made out of smaller r2r blocks. Maybe 18bit "pure pcm" is possible with TI 's SiCr thin film process. They claim 8piece 16bit r2r on single IC is now possible with their advanced SiCr resistors.
And the AD highspeed DACs? Are they pure PCM (zero oversampling, zero delta-sigma)?
http://www.analog.com/IST/SelectionTable/?selection_table_id=338
http://www.analog.com/IST/SelectionTable/?selection_table_id=338
I think I have to explain why I ask for highspeed PCM DACs in an audio forum. Quite a weird idea: If one tacted the DAC of a sample player with an analog VCO (variable frequency) one wouldn´t have to care about anti-aliasing and get a much fatter sound. In an online document from AD they describe architectures of highspeed DACs. They are segmented, but not delta-sigma. So there are at least 16-bitters in any desired speed.
Can this principle be realized?
Can this principle be realized?
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