generating other wave with DDS

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maziar

Joined: 06 Jun 2001
Posts: 257
Helped: 4
Location: Islamic republic of Iran

22 Feb 2002 7:57 ad9850 vhdl model

hi all

i try find DDS chip to generate sine and other wave (for example triangle) ???

Maximilian4711

Joined: 19 Feb 2003
Posts: 13

19 Feb 2003 19:19 arbitrary generator ad9854

Hi,

try at: http://www.analog.com

and search for "dds". I have used so far the Ad9850, Ad9851. There are relatively easy to use and very precise. Furthermore you will find many articles and complete projects with these ICs on the web (try google with ad9851 and/or dds).

May this will help you.

Max.

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19 Feb 2003 19:19 Ads

sugm

Joined: 11 Dec 2001
Posts: 61

20 Feb 2003 2:07 dds chip square wave

AD9850/51 only can generate a low frequency waveform. For higher frquency, you can select AD9854

maziar

Joined: 06 Jun 2001
Posts: 257
Helped: 4
Location: Islamic republic of Iran

20 Feb 2003 6:58

i think ADC9854 can not generate non sine wave this true ?

ttosolee

Joined: 16 May 2001
Posts: 74

20 Feb 2003 9:40

i think you are looking for true DDS based waveform generator chip or Arbitrary Waveform Generator chip.
but most chips are designed for different applications, so it is not easy to find out exact purpose.

you can check several links for DDS.
http://www.hit.bme.hu/people/papay/sci/DDS/products.htm

maziar

Joined: 06 Jun 2001
Posts: 257
Helped: 4
Location: Islamic republic of Iran

20 Feb 2003 10:18

i can not find any chip can download uor wave and run
i tr see many dds from AD,Haris and other but all can not do it

have any chip can do this operate ?

Stark

Joined: 10 Aug 2001
Posts: 86

20 Feb 2003 10:39

It depends on operating frequency you can always think to write VHDL model to fit your apps in FPGA because DDS usually generates sine and square wave function.
Stark