ADAU1442/ADAU1445 ASRC performance
Thread Summary
The user inquired about performance data for the ASRCs on ADAU1442 and ADAU1445 SigmaDSP parts, specifically THD, DNR, and FIR taps/group delay. The final answer confirmed that the ASRCs were designed similarly to the AD1896, with performance characteristics expected to be nearly identical. Page 7 of the ADAU144x datasheet provides ASRC specs, including dynamic range and THD+N. The user acknowledged this and expressed satisfaction with the provided data.AI Generated Content
Is any performance or implementation data available for the ASRCs on these SigmaDSP parts such as THD, DNR, or FIR taps/group delay? If not, I notice the supported ratios match the AD1895/AD1896---is it reasonable to use, say, the AD1895 as a proxy? Since the SPDIF receiver must be routed through an ASRC I'm also curious how performance of ADAU144x SPDIF receive compares with parts such as the WM8804 or CS8416.
Obviously, I can build a few proto boards and measure these configurations. But I wanted to check to make sure I'd not be reinventing the wheel first.
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ad1895
Sample Rate Converters
Page 7 of the ADAU144x datasheet has the specs for the ASRCs on these parts, including dynamic range and THD+N.
Yes, I'm aware of page 7---that's where the ASRC ratios are given. Am I correct in inferring from the lack other information that if I wish to understand the SigmaDSP ASRC implementation at a level comparable to say, the AD1896, I'll need to setup one of the DSP parts and perform measurments to acquire data similar to what's provided in, say, figures TPC 1 through 52 and figure 8 in the AD1896 datatsheet?
Yes, the ADAU1442 and ADAU1445's ASRCs were designed using an implementation similar to (but not exactly the same as) the AD1896. The performance characteristics should be nearly identical. You can expect the output of the ADAU144x ASRCs to be very similar to the TPCs on the AD1896 datasheet.
Great data; this'll save me proto spin. Thanks much!
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