TAC5212-Q1: TAC5212: DAC freq output and Debian driver availability

Hi 

I can update thread by the end of the day

Thanks!

Hi Angelo,

thank you for your patience, i will provide my feedback asap

Hi Daveon,

could you reply us within today? It's important for us because we have to decide if proceed or not with this component for our design!

Regards 

Hi Angelo,

There is a linux driver available on the product page. However it is not possible to unlock the bandwidth beyond 96kHz. That is fixed by design.

Best regards,
Jeff McPherson

Dear Jeff.

Thanks for your reply. I am not able to find the driver . Could you indicate me where i can download it?

Is this driver compliant with ALSA driver?

Another question is if Texas Instruments have audio codec PN able to have a  bigger output signal freq than 96Khz?

Regards

Hi Angelo,

You can access the driver files here: https://git.ti.com/cgit/lpaa-android-drivers/tac5x1x-linux-driver/tree/

The drivers are for ALSA. 

The TAC5xxx line of codecs are the codecs with the highest maximum output bandwidth of ~96kHz, but unfortunately this bandwidth applies even for high sample rates above 192kHz, with the max BW I believe a little above 100kHz. I see that the PCM51xx DACs go up to 384kHz sample rate, but the bandwidth is not in the datasheet for 384kHz fs. I can check the bandwidth on one of those devices at 384kHz if you would like. But, note that it is a DAC and not CODEC.

Best,
Mir

Hi Mir,

thanks for your reply and for the driver link. In our design, actually we use the lineout and microphone interface to drive our signals, but we are developing new product so we can change object architecture to have bandwith  up to 180 Khz. So please proceed to check info about other devices (such us DACs) features. This  could be great for us.

Best regards,

Angelo

Dear Mir, we have considered what you have said about DAC, so please if you could propose us some DAC PN (audio or not) useful to be used in our system to go over 96Khz bandwith. Sure , we need bandwith up to 180 Khz, resolution>=16 bit (24 bit could be better ) and support to bipolar output voltage.

A Texas yet released linux driver for the PN is considered a plus (could be great to cut development time)

Thanks in advance for all the PN you will propose to us

Regards

Hi Angelo,

Please give me another day to find and test on the device I suggested. I can find you some other TI parts as well and maybe pass this along to the respective team, these may be precision DACs and not audio specific DACs.

-Mir

HI, Mir,

ok thanks

Dear Mir,

 i have an other question. I have obtained acces to purepath Console. Could you say us if this tool could help us in our development?

Regards

PPC is a GUI which can be used for many of our audio converter devices, so yes it will help if you end up choosing a device which supports it. I tried to get a PCM5122 EVM running yesterday to test its bandwidth but ran into some issues and didn't have enough time to fully debug. I will try again today or Monday. 

Do you need 180kHz of bandwidth, or a signal bandwidth that is lower but goes up to 180kHz? I wonder if you could use some sort of mixer/frequency modulator to increase the output frequency of a 96kHz bandwidth signal to start at 96k and go up to 192kHz, or something like this. I ask this because a precision (non-audio) DAC would be more expensive and more likely NOT have a differential output option, you would need to implement your own op-amp single-ended to differential converter (TI has some documentation on this, so you are not alone here). Let me know about this.

-Mir

Daer Mir, do you have any news about PCM5122 EVM ?

We have a 120-180Khz signal bandwith and could be better for us to have a differential output to use as input for an amplifier ( Probably a class D)

regards

Hi Angelo,

My apologies, I didn't get to this yet. I will try to check before Friday. If it doesn't work, I would suggest making a new post asking the precision DACs team if they have a DAC that can do differential output over at least 180kHz bandwidth.

Best,
Mir

Dear Mir , i have seen DAC Audio Texas portfolio and sure PCM5242 could be an interesting object!

we have to found an ADC with similar features and performance to have similar performance for tx andrx channel

Regards,Angelo

Dear Mir, 

could you suggest me an ADC audio to struct RX and TX channel similar feature and performance ? foundamental is the 120-180Khz signal bandwith 

we havse seen PCM5242, TAD5212 as DAC and TAA5212 as ADC. Could be a right choice? Have these objects driver ALSA Debian/Ubuntu compliant?

Regards

Hi,

Again, the TAx5xxx devices cannot reach 180kHz bandwidth. They max out at around 100kHz bandwidth, even for the high sample rates. Maybe you could try decimating your signal to halve the bandwidth? The TAx5xxx devices do have a Linux driver so they would be ALSA compliant. I will check PCM devices bandwidth for you. 

Best,
Mir