DAC38J84: Question about speed

Weiyu Leng

Part Number: DAC38J84
Other Parts Discussed in Thread: DAC37J84EVM,

Thank you for your quick response.

Then, there is another confusion. In Table 11, if, for each channel number of bits is 16 and sampling frequency is 1.23GHz, then the required data through SERDES is 4*1.23G*16=78.72Gbps. But this doesn't match max f_serdes in Table 11. Am I wrong anywhere?

I would like to use DAC37J84EVM on my Xilinx KC705 development board.

Is there any application note or tutorial about the interface protocol between them?

Thanks

Weiyu

over 5 years ago

0 Kang Hsia over 5 years ago

TI__Guru 66114 points

Hello,

There is actually another multiplication factor of 1.25 due to 8b/10b encoding (increment factor of 1.25x)

However, the SERDES rate remains at 12.3Gbps because the whole data transfer is shared among 8 lanes.

Check out the following for the KC705 board
www.ti.com/.../slau580b.pdf
-Kang

0 Weiyu Leng over 5 years ago in reply to Kang Hsia

Intellectual 360 points

Hi Kang,

So you mean that if I want to use DAC38J84EVM with my KC705, I must put this TSW14J10 Interposer Card in between?

Thank you.

-Weiyu

0 Kang Hsia over 5 years ago in reply to Weiyu Leng

TI__Guru 66114 points

Hi,

the TSW14J10 is used if you want to use TI HSDC PRO software to talk to DAC38J84EVM through Xilinx Eval board.

If you want to have reference to the TSW14J10EVM, you can refer to the following tools page
www.ti.com/.../TSW14J10EVM
Xilinx firmware design can be downloaded from here:
www.ti.com/.../slac690
-Kang

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DAC38J84: Question about speed