This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

About DAC5674 EVM+TSW1400

Guru 15445 points

Replies: 1

Views: 181

Although DAC5674 EVM+TSW1400EVM is estimating, DAC cannot output well.
Although the following conditions are estimating, an output is not in sight from TSW1400.
(Even if it turns off TSW1400, DAC is outputting)
If there is a problem, please let me know.

<TSW1400>
"High speed data converter pro" is used.
The CMOS mode of DAC is chosen.
ToneBW 1
# 1
Tone center 64M
Data rate 400M SPS
=> output waveform and the FFT result are made.
However, with [ although SEND is pushed ] no reaction.

<DAC5674EVM>
Power supply: 3.3VA, 3.3VCLK, 1.8VD x 1
It is a synthesizer CLK IN:J4 and is 0dBm DIPSW 100 MHz.
DIV[1:0]=[0,0]
HP[2:1]=[0,1]
X4=1
I_OUT J7 is seen with the spectrum analyzer.

Moreover, is connection of DAC5674EVM and TSW1400EVM henceforth [ attached 3pins~ ] right?

Thank you for your consideration.

1 Reply

  • Hi Satoshi,

    Pin number 1 on the header pins of the DAC5674EVM needs to be aligned with Pin 1 on the TSW1400. Looking at the picture you posted, the DAC EVM needs to slide all the way to the right.

    Make sure W5 is open or in the 2-3 position. You need to provide a 100 MHz clock to J4 for the DAC sampling clock. You also need to provide a 100 MHz clock to the CMOS_CLK input of the TSW1400, it needs to be synchronous to the clock provided to the DAC EVM. Based on the IOVDD voltage of the DAC (voltage provided to J12), you need to set the CMOS_IO_LEVEL jumper on the TSW1400 appropriately. Also, make sure W4 has a jumper between pins 2 and 3 to enable internal clock mode.

    Based on this mode, your data rate is actually 100 MHz, so you should enter 100 MHz in HSDCPro.

    Regards,
    Matt Guibord

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.