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| What do i need for this DAC ? |
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| SiliconWizard:
--- Quote from: Jan Audio on November 01, 2018, 01:52:53 pm ---This DAC is indeed Cirrus logic, Wolfson. --- End quote --- Wolfson was acquired by Cirrus a few years ago, but recent CS DACs are not Wolfson products. Not sure they even share any silicon IP. Recent CS audio DACs are cheap and pretty decent. --- Quote from: Jan Audio on November 01, 2018, 01:52:53 pm ---Next time i also take a look at Texas instruments. --- End quote --- If you're looking for higher-end audio DACs from TI, I would recommend the PCM1794 which is excellent. A whole different ballpark. It's not as straightforward to integrate though - it has current outputs and will need a proper output stage to get the most out of them. You'll get the same with most high-end DACs. --- Quote from: Jan Audio on November 01, 2018, 01:52:53 pm ---That DAC you recommend is a 1 bit, not multibit. --- End quote --- Not sure what you're on about here. The WM8521 and CS433x DACs are both sigma-delta DACs with voltage outputs. The internal details of the respective sigma-delta modulators are not disclosed anyway and the rest is just marketing. The CS43xx have better THD figure and only slightly lower SNR - overall, I think they perform better, that's all that really matters IMO. You can find even better performing DACs from Cirrus - for instance the CS434x series, and even the CS43198 - I just gave an example of what was close enough to the obsolete WM8521. |
| Jan Audio:
I readed all these manuals and they say multibit is less noisey, but you are right its about the specs. Hoping i have some sound tomorrow, MCC dont generates interrupt for me, dont know what to do. |
| SiliconWizard:
--- Quote from: Jan Audio on November 01, 2018, 05:23:34 pm ---I readed all these manuals and they say multibit is less noisey (...) --- End quote --- OK. There's much debate about this. Multi-bit (or segmented) sigma-delta modulators are hard to design right. A simple sigma-delta modulator running at a high enough frequency will be much simpler to design and much easier to get right. Again, for the kind of performance you were targetting, I would stick to the simple sigma-deltas. If you're willing to use simple-to-integrate, voltage-output DACs, it won't matter. I would only begin to bother if aiming at SNRs > 100 dB and THD+N < -100 dB, really. In which case, the output stage must be designed carefully as I said above. |
| diyaudio:
--- Quote from: Jan Audio on October 31, 2018, 04:28:12 pm ---Hi, i have this DAC for I2S : WM8521 The MCU i use is : PIC32MX170F256B I thought i generate some MCC, thing is MCC dont has I2S codes, anybody know what to do ? Now i read the manual : The audio interface supports I2S, Right Justified and DSP digital audio formats. What is the difference ?, google dont know. Dont i need more external components for this DAC ?, can i hook it direct to the MCU nothing more needed ? Ofcourse i also need some capacitors, this DAC is SOIC package, if i buy a 100n SOIC, does it fit the pins ?, maybe i can solder it on the smd-converter then, close to the DAC. I saw this PIC32MX170F256B has special audio codec I2S, so i got this one. Maybe a SPI DAC is better or simpler ?, what is the big difference ?, exept that MCC dont has I2S code, then i could buy any PIC32, all has SPI on board. This DAC is also not being made no more, newer smaller DACs are there now, you think this SOIC DAC is different with less quality then the newer ones ?, is is it only smaller package. thanks in advance --- End quote --- You need to make sure the PIC supplies all the necessary clocks required. BCLK (Bit clock input) , LRCLK (Sample rate clock input) and MCLK (Master clock input) Operation using master clocks of 256fs, 384fs, 512fs or 768fs is provided, selection between clock rates being automatically controlled. Sample rates (fs) from 8kHz to 192kHz are allowed provided the appropriate system clock is input |
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