PCM4204: dynamic range of PCM4202 vs. PCM4222

edoutthere

Prodigy 80 points

Part Number: PCM4204
Other Parts Discussed in Thread: PCM4222, , PCM4202

References:

PCM4222 SBAS399A, page 4: PCM output, quad speed, fs = 192khz unweighted 22Hz to 40KHz

PCM4204 SBAS327A, page 4: PCM output, quad speed, fs = 192khz unweighted 20Hz to 40KHz

I noticed that the DR of the PCM4222 at the above settings is 118dB and the PCM4204 is 108.

is the 4204 DR a typo? What is the explanation for the 4204 value of 110dB

It seems like the 4204 would have the same/similar guts as the 4222

What are the unweighted DR values for the 4204 48KHz and 96KHz rates?

BTW, the 4202 at the same settings and rates is 117dB

Thanks,

over 6 years ago

0 Ravi Patil over 6 years ago

TI__Expert 5645 points

Hi,

I will have to look into this a bit more and probably run some measurements on the bench as well before I conclusively answer your question. I do appreciate your patience while I dig into this a bit more.

Thanks.

Best regards,

Ravi

0 edoutthere over 6 years ago in reply to Ravi Patil

Prodigy 80 points

Ravi,

Have you had a chance to look into this?

0 edoutthere over 6 years ago in reply to edoutthere

Prodigy 80 points

Ravi,

I am still interested in the PCM4204 and was wondering if you had a chance to look into my question.

Thanks,

0 Andy Peters over 6 years ago

Genius 3945 points

The better parts comparison is between the PCM4202 and PCM4204, where the latter is a four-channel version of the two-channel former.

The PCM4222 is a different design, and notably it uses a +4.0 V analog rail rather than the +5.0 V rail of the 4202/4204.

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PCM4204: dynamic range of PCM4202 vs. PCM4222