TSW1406EVM: TSW1406EVM + DAC3482EVM

aronii

Part Number: TSW1406EVM

I plan to use the DAC3482 (2 channels, 1.25 GHz. DAC) for my project. I plan to evaluate it using the TSW1406 board which has 64K samples memory.

Before I purchase them, I got few questions:

1. Is there a DAC3482 or a DAC3484 chip in the DAC3482 evaluation board? The design files show DAC3484.

2. I would like to download 2 arbitrary signals into the 64K memory of the TSW1406 and output them periodically (after the buffer end, it returns to the first sample and so on). Is it possible?

3. I would like to get those 2 signals at 2 of the outputs without any mixing between them (or any other operation between those 2 signals) at X4 interpolation. Is it possible?

I checked the datasheet and I saw that the coarse mixer can be disabled. However, I'm not sure if when the mixer is disabled, I can still do X4 interpolation?

( I noticed that the coarde mixer (CMIX) can be disabled but I cannot see how FMIX can be disabled?)

4. Is it possible to disable the NCO (Numerically Controlled Oscillators)?

I would appreciate your fast response. I must make a decision within 2 days.

over 6 years ago

0 Jim Brinkhurst1 over 6 years ago

TI__Mastermind 43910 points

Hi Aronii
We have received your question. Someone will respond tomorrow.
Best regards,
Jim B

0 aronii over 6 years ago in reply to Jim Brinkhurst1

Expert 1140 points

Tomorrow is over... We are already 3 days after the question was asked and no answer.
We need to bid on a large project with this DAC and if we won't have a decent answer today, you will loose a sale of thousands of chips.
I'm sure that you got more urgent tasks but we have to bid until Monday, whether with TI chip or with Analog Devices chip.
So it is up to you...

0 jim s over 6 years ago in reply to aronii

TI__Guru* 91947 points

Aroni,

The DAC3482 should have a DAC3482 device on it. The EVM will support both parts. That is why there is four outputs. I have your setup running in the lab. You can generate two arbitrary signals with this setup. Using the attached pattern file, I am generating a 100MHz output tone on CHB and a 50MHz tone on CHC.

You can run both outputs with x4 interpolation filter. Keep in mind that the IF signal must be =< the 0.4 x input data rate due to the BW of this filter.

You can disable the FMIX and the NCO. Writing a 0x8002 to add 0x02 will disable both. Bit 4 enables the NCO and bit 6 the FMIX.

Regards,

Jim

100MHz_CHB_50MHz_CHC.csv

0 aronii over 6 years ago in reply to jim s

Expert 1140 points

Thanks for your detailed response! I really appreciate it.
We are also in the same situation... New year, new budget and new contracts...

0 aronii over 6 years ago in reply to aronii

Expert 1140 points

Hello Jim,

After reading your answer I bought the 2 EVM boards and they don't work. I posted a question to TI support and another engineer named Yusuf answered me and said that those 2 boards do not work together.
I wonder who is right? I asked you before I bought those 2 boards and from your answer I understood that there should not be any problem to operate those 2 boards (Up to 1 GHz).
Can you tell me whether they work together or not?
I checked the TSW1406 design files and there are 32 LVDS lines in it.
In addition to that, after I downloaded the TSW1406 evaluation software, it recognize the card and only then I can select DAC3482 (while other ones cannot be selected).
Can you take those 2 cards and check?

0 jim s over 6 years ago in reply to aronii

TI__Guru* 91947 points

Aronii,

What exactly does not work? You mention "while other ones cannot be selected". What other ones are you trying to use? The TSW1406EVM should work with the DAC3482EVM up to 1.25Gsps. What rate are you testing the DAC at? Can you send screen shots of the DAC GUI? The more information you can provide the more we can help you.

Regards,

Jim

0 aronii over 6 years ago in reply to jim s

Expert 1140 points

Hello Jim,

We are using those boards without extgernal clock. The jumper JP5 is with pins 2 and 3 shorted. We also selected it in the DAC3482 software.

We download a file with sine wave on one channel and DC on the other one. We connected the 2 outputs J6 and J3 directly to an oscilloscope.

We expect to see a sine wave on one channel and nothing on the other channel.

We operate the boards as follows:

1. Connect the DAC 3482 and the TSW1406 boards to USB. DAC board is connected to +6V supply as well.

2. In the DAC software we select DAC3482 on the top (black bar).

3. Then we do "Load regs" with the default file (DAC3482_FDAC_1228p8MHz_4xint_NCO_30MHz_QMCon - attached).

4. Now we change to external clock (Control -> Manual_PRI_IN we change to Manual_SEC_IN).

5. We do "Send All"

On hte TSW1406 software we do "DAC" and then select DAC3482 (on the left)

Then we download the attached CSV file. On "Data rate" we put 307.2 Mhz (we tried lower frequencies - nothing works)

and then we do SEND.

I attach all of the pictures of all screens + files + board picture (please check if jumpers are set correctly).

The CSV file was changed to TXT

Thanks for your help,

Avi

3312.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

SINE WAVES.TXT

0 jim s over 6 years ago in reply to aronii

TI__Guru* 91947 points

Aronii,

I just verified this setup works with a TSW1406EVM and a DAC3482EVM. Please see the attached document.

Regards,

Jim

DAC3482_EXT_DAC_CLK_1228.8M.pptx

0 aronii over 6 years ago in reply to jim s

Expert 1140 points

Jim,

We don't have an external clock source. We would like to use the PLL indide the CDCE62005 chip with the on board 19.2 MHz. clock and run the dac at about 1000 MHz. Can you tell me what should I change (Except for the jumper and the "Manual_SEC_IN" setting)?
Can you try to run it without external clock?
We would also like to disable the internal mixer.

Thanks,
Avi

0 aronii over 6 years ago in reply to aronii

Expert 1140 points

Jim,

We already wait 8 days for your response. Our project is stuck. Can anyone else help?

0 aronii over 6 years ago in reply to aronii

Expert 1140 points

CDCE72010 - sorry for the typo.

0 jim s over 6 years ago in reply to aronii

TI__Guru* 91947 points

Aronii,

Sorry for the delay. We are currently working on your request and hopefully will have something for you in the next day or so.

Regards,

Jim

0 jim s over 6 years ago in reply to aronii

TI__Guru* 91947 points

Aroni,

The onboard crystal is 19.2M and the PLL on the EVM is an integer PLL with fixed feedback divider values. Based on the crystal and the fixed feedback dividers, generating an Fdac of 1G is not possible. The closest we can get is Fdac = 983.04M which there is already a config file for this that works with the on-chip clocking option. If you need 1000M for Fdac, you will need to replace the on-board 19.2MHz, with a 20MHz crystal or something that can integer divided into 1000M. If you decide to go this route, we can assist with generating the required config file for this.

Regards,

Jim

0 aronii over 6 years ago in reply to jim s

Expert 1140 points

Jim,

OK, 983.04 MHz is OK. How do I operate it? I sent you all of the pictures of the setup screens. It does not work.

What do I have to change in order to make it work?

I would appreciate your quick response. I sent you the pictures a long time ago.

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

TI__Expert 4880 points

Aronii,

Here is a brief guide on how to setup your desired configuration.

The config file for clocking the Dac at 983.04MHz is attached to this post so you should not have to change any of the settings. But just in case i included pictures of what the GUI settings should look like for you to verify that the config file works on your end.

YusufDAC3482 Internal Clock Operation.pptx

DAC3482_FDAC938p04MH_NCO_50M.txt

   x00	   xD288
   x01	   x0000
   x02	   x8052
   x03	   xA001
   x04	   xFFFF
   x05	   x0260
   x06	   x2800
   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	   x5555
   x15	   x0D05
   x16	   x0000
   x17	   x0FA0
   x18	   x205F
   x19	   x10F4
   x1A	   x4820
   x1B	   x0800
   x1C	   x0000
   x1D	   x0000
   x1E	   x1188
   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	   x0000
   x2E	   x0000
   x2F	   x0000
   x30	   x61A8
   x7F	   x0004
CDCE62005 Registers
Freq:19.200000MHz
Address	Data
00		80400000
01		811C0321
02		81400302
03		810C0303
04		00040304
05		38101A85
06		04BF1F66
07		151877F7
08		20001808

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

Expert 1140 points

Hello,

I'm sorry fo rthe delay in my response, we were on Passover holiday + som urgent matters.

We tried your file with AD3482 software. Same file as you sent + followed your instructions. We got some weired combination of few sine waves:

However, if we do the same with DAC3484 software we get the sine waves:

As you may see nice sine waves of 50 MHz.

However, if we press this check box once again:

We get 2 sine combined waves:

So now we all understand that the hardware works but we also understand that we don't know how to operate it...

Why it does not work with DAC3482 software?

Why it is changing the waveform after we click this checkbox in DAC 3484 software?

We need to know the exact way of operating the DAC3482 boars + exact initialization because we cannot use the evaluation board fo rour project. We have to send exact parameters from FPGA.

I would appreciate your detailed answer.

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

TI__Expert 4880 points

Are you sure you are changing the Y3 divider in the CDC tab? Usually the distortion you see is as a result of clocking issues between the DAC and FPGA.

Can you make a PPT showing me what you are doing step by step. Include pictures of the hardware setup, the DAC GUI settings as well as pictures of the CDC settings.

Yusuf

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

Expert 1140 points

REGS1.TXTHello Yusuf,

I see that you are not using the TSW1406 board as I do. I cannot define 64K complex samples as you did. Maximum samples are 32K - real or complex.

Can you take a TSW1406 board and try the same? I attach my setup file - maybe I did something wrong.

I got some sine waves now but they are 10% less than the frequency that I entered!

I enter 50 MHz - I get 45 MHz. I enter 80 MHz. and I get 72 MHz. exactly.

Can you tell me why?

One more question which was not answered:

The attached setup file is exactly the initialization of the DAC3482 registers? Is it register address + Value?

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

TI__Expert 4880 points

Check and verify that you're dac clock and data rate are what they should be. Data rate = Fdac/interpolation.

Yes I will take a look once more but it make take a few days to get back to you.

Yusuf

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TSW1406EVM: TSW1406EVM + DAC3482EVM