THS6301: THS6301 DSL

Hello Divakar,

Could you share a proposed circuit or block diagram?  Are you looking to drive a VDSL2 signal over wireline twisted pair, or take a VDSL2 source and convert it to Ethernet to drive over wireline twisted pair?

The THS6301 is optimized for driving a differential input into DSL signaling down differential cabling.

From my understanding of DSL signaling, the range of profiles would require driving the cabling at high line powers (up to dBm).  Could you explain or expand more on why there is coverage of all eight VDSL2 profiles needed in the design?  

I would overall like to know more about the design purpose and how to best support your system; the THS6301 & THS6302 are our newest DSL line driver ICs from TI HSAMPs and are capable of G.Fast and G.mgFast communication frequencies.  As such, the line powers required are lower, and I want to understand how to best support your design.  You may need separate channels with multiplexing, perhaps using multiple DSL drivers.

Is the source being repurposed to send Ethernet signals?  Or is there a new client or target device that only receives Ethernet?  Do you have a microcontroller selected, or know the parameters of what you need from a TI microcontroller?

Converting successfully from one wireline communication type to the other will require a good understanding of your circuit system; it may increase cost or solution (circuit) size to be able to convert all eight profiles.

Do you know what kind of Ethernet signal type you are looking to implement? 

Best,

Alec 

Hello Alec,

this is what our object is. Please see the block diagram below. Our objective is to convert Ethernet 10/100/1000 copper interface into VDSL2. Right now we are using a copper SFP module that provides Ethernet to VDSL conversion. That particular module supported these profiles I mentioned so we need to continue supporting it. The module is obsolete. 

You can also reference this link as this is what we are trying to do. We do not need USB.

https://www.ti.com/solution/modem-cable-dsl-gfast

Regards,

Divakar

Hello Divakar,

Could you elaborate on what you mean by "microcontroller"?  Are you referring to the DSL modem?  

Best,

Alec

Hello Alec,

https://www.ti.com/solution/modem-cable-dsl-gfast

If you click on that link, it shows an SOC/Processor. I  guess I meant that. So I need a processor/SOC to do the conversion. Not a microcontroller,

thanks,

Divakar

Do you need anything else from me for further assisting me? Would you like to friend me so we can message each other privately?

Hello Divakar,

Do you have a chosen SOC/Processor for the design?  I am not sure there is a single TI device which can receive Ethernet signals and output signals to a line driver for DSL.  I will spend some time to look into this piece of the discussion.

Best,

Alec

No. 

I do not. It looks like you had this in your portfolio

https://en.wikipedia.org/wiki/Texas_Instruments_AR7 but sold it off to Infineon. Right now how do your customers use it? What SOC do they use?

Divakar

Hello Alec,

We are looking for any solution – not necessarily a ONE CHIP solution. Our goal essentially is to build a VDSL modem – with any combination of ICs.

I approached TI when I saw the line driver which is just one piece of the entire solution we are looking for.

Hello Divakar,

I am going to check across my team for ideas on the other products/product lines you would need to combine alongside a line driver IC.

Could you share if you have any performance, size, or cost constraints?  I understand that the obsolete nature of the prior part necessitates a solution.

Best,

Alec

Thank you,

no at this point there is no target price. Size may matter so less the chips, better the solution.

Hello Divakar,

Thank you for the update.  Let us focus on the DSL component of your design for right now:

We are looking to implement functionality for all six profiles, which is a feature of the previous solution.  Do you know the line impedance, line power, or details of how the VDSL2 system was implemented at the output of the copper SFP module?  For now we can assume there is a black box allowing incoming Base 10/100/1000 Ethernet to be converted to a differential output signal using DSL tones and spacing.  Is there a transmission distance requirement?  Is there a multi-tone power ratio (MTPR) requirement for the design?

Depending on the line characteristics and tolerance for signal distortion, we may be able to work through a potential solution with THS6301/02 even though these are lower output drive parts for G.Fast/G.mgFast.

Is there a requirement to only use VDSL2 profiles?  Would the project need expand to include G.Fast or G.mgFast?  These higher 212MHz and 424MHz signal bandwidths require lower line powers, such as 8dBm.

Best,

Alec

Thanks,

can you send me a private email so I can email you the datasheet of the SFP module we are using?

The questions you are asking such as transmission distance relate to the DSL spec. I am not sure what this is - Is there a multi-tone power ratio (MTPR) requirement for the design?

Is there a requirement to only use VDSL2 profiles?  Yes that is right and as a CPE (Customer premises equipment) which connects to a DLSAM

Would the project need expand to include G.Fast or G.mgFast?  No, 

Hello Divakar,

I will send you a private message with my email.

Alec