Powering Analog Devices DDS AD9852 Evaluation Board ???

[waqasbee4]

Hello,
In Analog Devices DDS AD9852 Datasheet it is mentioned that in order to power up evaluation board;
3.3V Vcc, 3.3V DVDD and 3.3V AVDD are required with a common ground.

On Analog Devices website it is mentioned in feedback section that a single 3.3V supply will not be a good option considering noise

I want to ask in order to use Evaluation board are 3 voltage supplies must? or I can use some other solution (Decoupling/Filtering etc)?

Regards;
Waqas

 

[chuckey]

I would have thought that an intermediate "decoupling" board should do the trick. Get your 4 wires, connect the earth wire to a common point, then off to the PSU. each live wire then decouple to the common point via a 1NF disc, 1 MF polycarboante and 100 MF, then feed through a 100 micro H coil to the +3.3V feed. The PCB suppliers have saved a lot of real estate and money by letting you do this.
Should do the trick. If you find you still have a noise problem then you can boost the decoupling for that line.
Frank

 

[waqasbee4]

Thanks Chuckey
I dont have board in hand right now and delivery will take some time
I will try it once I get the board and then I will get back to you on this

Thanks again