Echo Dot Gen 4 DAC chip?

[skinnyq]

Hello, I've been considering getting an echo dot as a chromecast audio alternative which is not available to me.
The previous generations of echo dot used a TI DAC3203 which is rather poor (https://www.ti.com/lit/ds/symlink/tlv320dac3203.pdf), the 4th generation does not seem to use it:
https://www.briandorey.com/post/echo-dot-4th-gen-smart-speaker-teardown

Looking over the teardown I cannot find any DAC chip in the boards.
There is only a headphone driver diode: PAM8908.
Can anyone understand what chip is being used as the DAC for the analog output?

Does anyone have a gen 4 echo dot and can give his impressions on the sound quality when using the analog out?

 

[ZolaIII]

DAC is probably integrated in either main CPU IC or WiFi-BT one similar to one on higher integrated MT8516 SoC. Interesting enough they used quad chenel Burr Brown ADC.

 

[mansr]

Can anyone understand what chip is being used as the DAC for the analog output?

This, apparently: https://www.ti.com/product/TAS5805M

 

[ZolaIII]

@mansr
Yup it's DAC/AMP combo IC.

 

[Hon]

It says: "a TLV320ADC5140 Texas Instruments Quad-channel 768-kHz Burr-Brown™ audio analogue to digital converter." I don't have one, but don't mind the signal from 3rd gen for casual listening several hours a day. OOps -- guess thats just for the microphones.

 

[skinnyq]

This, apparently: https://www.ti.com/product/TAS5805M

@mansr
Yup it's DAC/AMP combo IC.

How would you rate this DAC in comparison with the CCA? for example?
Just by looking at the specs.

EDIT: are you sure its this one?
The 3rd gen echo dot used TLV320DAC3203 with a 192 kHz sampling rate.
This one has only 96.

 

[ZolaIII]

@skinnyq if the earlier one is to be rated poor than this one can only be rated poorer.

 

[trl]

Few more teardowns for the Dot 4 could be found below:
- https://www.briandorey.com/post/echo-dot-4th-gen-smart-speaker-teardown
- https://www.microcontrollertips.com/teardown-amazon-4th-generation-echo-dot-faq/
- https://www.edn.com/seeing-inside-whats-amazons-fourth-generation-echo-dot-got/
I do have Echo Dot 5 and in terms of Hi-Fi quality I'm not very pleased with how it sounds, but it sounds decent enough for my kid and for anyone that is not looking for a Hi-Fi speaker. I mean, it does the job of playing audio with an output power able to fill-in a bedroom without troubles, but without bass, of course.

However, Echo 4 is playing in a different league and, for a moderate output power level, it sounds pretty good in a bedroom and quite in a living room, given it's price and what was designed for. The two tweeters are able to cover a wide angle of the room and, if there's a glass table underneath, then trebles will also get reflected even better across the room. Teardown here: https://www.audiosciencereview.com/...n-echo-4-teardown-and-few-measurements.40636/

Looks like the above Echo devices are all sharing the same audio Class-D amplifier chip: https://www.ti.com/product/TAS5805M, Echo 4 containing two of such chips on the board, probably one for the woofer and the other one for the two tweeters.