DAC3482EVM: Operating DAC3482EVM with TSW1406

aronii

Part Number: DAC3482EVM

I'm trying to operate DAC3482 EVM (250 MHz. dual DAC, 16 bit resolution with interpolation).

I connected 6V, operated the software and input some CSV files. I tried a file given to me by TI (50 + 100 MHz. sine waves) and I get only random noise.

I also anoter file that I made - DC on one channel and a sine wave on the other one (see picture below). I still get weird signals. I did FFT of both channels using my oscilloscope - no peaks.

I attach a picture of my board. Could you please tell me what did I do wrong?

over 6 years ago

0 Yusuf%20Agoro over 6 years ago

TI__Expert 4880 points

Hey Aronii,

You say your using interpolation but i dont know what your DAC clock is nor do i know your interpolation factor.

Try using the configuration file i am attached below to configure the DAC3482EVM. The setting is for 1228.8M Dac clock with 4x int. which means your data rate in HSDC pro should be set to 307.2M.

Reference the following user guide to make sure that your jumper settings and FPGA clock frequencies are correct.

http://www.ti.com/lit/ug/slau432a/slau432a.pdf

Yusuf

DAC3482_FDAC_1228p8MHz_4xint_NCO_30MHz_QMCon.txt

   x00	   xF28C
   x01	   x0000
   x02	   x8052
   x03	   xA001
   x04	   x4DF1
   x05	   x0000
   x06	   x3400
   x07	   xFFFF
   x08	   x0000
   x09	   x8000
   x0A	   x0000
   x0B	   x0000
   x0C	   x05A6
   x0D	   x05A6
   x0E	   x05A6
   x0F	   x05A6
   x10	   x3000
   x11	   x0000
   x12	   x0000
   x13	   x0000
   x14	   x0000
   x15	   x0640
   x16	   x0000
   x17	   x0640
   x18	   x205F
   x19	   x10F4
   x1A	   x4820
   x1B	   x0800
   x1C	   x0000
   x1D	   x0000
   x1E	   x1111
   x1F	   x8882
   x20	   x2400
   x22	   x1B1B
   x23	   x001F
   x24	   x1000
   x25	   x7A7A
   x26	   xB6B6
   x27	   xEAEA
   x28	   x4545
   x29	   x1A1A
   x2A	   x1616
   x2B	   xAAAA
   x2C	   xC6C6
   x2D	   x0004
   x2E	   x0000
   x2F	   x0000
   x30	   x61A8
   x7F	   x0001
CDCE62005 Registers
Freq:19.200000MHz
Address	Data
00		80400000
01		813C0001
02		81400002
03		C10C0003
04		00040004
05		29F01A55
06		44AF0006
07		165294A7
08		20001808

0 aronii over 6 years ago in reply to Yusuf%20Agoro

Expert 1140 points

The TXT file that you sent is the default file which comes with the DAC3482 software. Files are identical.

In the DAC software we do "load regs". We selected your file. Then we did "send all"

On the TSW1406 software we selected "DAC" tab and then DAC8432. Then we clicked "Load external pattern file" and downloaded the excel CSV file that I attached before.

(Sine waves.csv). Then we did "SEND". We still don't see anything.

Did we do anything wrong? The bord is connected directly to the oscilloscope. Is it OK?

0 aronii over 6 years ago in reply to aronii

Expert 1140 points

I forgot to mention that we use the internal CDCE62005 chip - not an external clock. So we changed JP5 to positions 2-3 (shorted) instead of the default. It stil doesn't work.
We measured the DAC clock at R71, R72 and we get a sine wave of about 125 MHz. riding on DC - not even close to 307 MHz.
It seems that the setup file for the CDCE62005 is different.
We don't get any clock at J12 or J15 (we use a 1.5 GHz analog input LECROY scope.
Please aslo note that eh datasheet that you sent refers to TSW1400 - not to TSW1406.

Last thing: I clicked by mistake the link to unsubscribe from this thread. Please register me again. I wish to get a notification by E-mail when you answer.

0 Yusuf%20Agoro over 6 years ago in reply to aronii

TI__Expert 4880 points

Hey Aronii,

The TSW1406 doesnt seem to be compatible with that device. You will need to use the TSW1400
to work with the DAC3484EVM.
Yusuf

0 aronii over 6 years ago in reply to Yusuf%20Agoro

Expert 1140 points

IT is DAC3482 not DAC3484 EVM.

You can see that the DAC3482 EVM is listed in TSW1406 web page

http://www.ti.com/tool/TSW1406EVM

and also in the datasheet:

If this board was not compatible, then I could not select it from the list... (in the software)

I also asked in the forums about operating both boards together before I bought them and no one told me that they don't work together.

I wonder where did you read it?

The difference between the boards is the speed. I don't need it for maximum speed. 1 GBps is OK for my application.

0 Yusuf%20Agoro over 6 years ago in reply to aronii

TI__Expert 4880 points

Arnii,

I see your point. We usually use the TSW1400 when interfacing with the DAC3484 so i will have to put in an order for TSW1406 in order to run some experiments on my end and get back to you. I will check back in with you as soon as I receive the board.

Yusuf

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DAC3482EVM: Operating DAC3482EVM with TSW1406