• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 47 subscribers
  • Views 613 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

DAC3482: a problem with 4 times interpolation configuration data

Nina Zhang
Prodigy 10 points

Part Number: DAC3482

There is  a problem with 4 times interpolation configuration data

fDATA=312.5MHZ 4 times interpolation , Using the following register configuration, the measured output waveform is incorrect

0x02-8000
0x00-0298
0x01-000e
0x03-7001
0x10-3000
0x18-2c5f
0x19-2894
0x1a-ac00
0x1b-0800
0x20-2201
0x24-0400
0x2d-0004
0x30-0000

fDATA=500MHZ 2 times  interpolationn  ,Using the following register configuration, the measured output waveform is correct:

0x02-8000
0x00-0198
0x01-000e
0x03-7001
0x10-3000
0x18-2C67
0x19-20F4
0x1A-FC00
0x1b-0800
0x20-2201
0x24-0400
0x2d-0004
0x30-0000

  • 0
    TI__Guru* 91947 points

    Nina,

    I was able to get our DAC EVM running with no problems using your setup. See configuration file and setup document for more info.

    Regards,

    Jim

    Fullscreen DAC3482_Fs_1250MHz_NCO_60MHz.txt Download 
       x00	   xF28C
   x01	   x0000
   x02	   x8052
   x03	   xA001
   x04	   x4DF1
   x05	   xBA60
   x06	   x2D00
   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	   xBA5E
   x15	   x0C49
   x16	   xBA5E
   x17	   x0C49
   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	   x0004
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
    DAC3482_EXT_DAC_CLK_1250M.pptx