AD Direct Digital Synthesis Modules. The circuit is taken directly from the example in the AD datasheet. and uses a MHz clock and a 40MHz output. Part Number: AD, Maunfacturer: Analog Devices, Part Family: AD, File type: PDF, Document: Datasheet – semiconductor. Introduction. This module described here is based on ADS, a CMOS, MHz, and Complete DDS. Synthesizer. The AD is a highly integrated device.

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Anyone out there have any problems getting these boards to work? I was able to get my AD board working in only about 30 minutes taking my time using this info.

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International prices may differ due to local duties, taxes, fees and exchange rates. Many of these are sensitive to the rotation of the blue pot. Comparable Parts Click to see all in Parametric Search. Interestingly, if I use the 3. Tried ArduinoScope but is very limiting. The square wave’s duty cycle is adjusted with a pre-set potentiometer on the module itself.

I wonder if there is a DC bias in the output waveform. I have two of these boards and cannot get either of them to work. Other models listed in the table may still be available if they have a status that is not obsolete.

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The various ranges specified are as follows: Parallel Byte or Serial Loading Format. Hope usefull to others. Please treat me as a newbie to Arduino and programming in general.

D9 is a PWM pin so the display’s backlight brightness can be adjusted if desired. I first purchased the Dark blue board with four jumpers and two rows if pins next to each other.

Sorry the picture links did not work but there no way I know in this forum to edit the post. Good luck with your project. I also hooked up an SDR and checked but saw nothing there either.

Testing an eBay AD9850 DDS module with Arduino Uno

In the second version above I changed the documentation but not the actual port assignment. My setup is very basic.

Package Description The package for this IC i. Notify me of new posts by email. Hi All, I am using the AD with a pic microcontroller for outputting a square and sine wave in datashewt range of khz. It turned out to be a speck of something on the Arduino UNO itself.

What AD source code to produce frequency output 20Mhz with clock in Mhz?? Hi Ihab, I am not sure if this forum is still alive. This is a very neat job you did. This sine wave can be used directly as a frequency source or converted to a square wave for agile-clock generator applications. Good Evening Sir, Thanks for providing the arduino code. I get some idea how it work now. Pretty impressive little board. Transit times from these sites may vary. Aad9850, I’ve limited the available frequency range from 10 Hz to 10 MHz in the software.

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The model has been scheduled for obsolescence, but may still be purchased for a limited time.

AD Datasheet and Product Info | Analog Devices

I am using this as an oscillator in other radios. Are there differences in quality of components in different batches of modules? Please consult the datasheet for more information.

Ugly at best, even after a decent filter…. An interrupt-driven rotary encoder, connected to the ATmega interrupt pins D2 and D3adjusts the frequency between 10 Hz and 10 MHz in pre-set steps.

Its really very weak. ADIsimDDS uses mathematical equations to model and illustrate the overall performance of the selected device. Or are there datssheet comparable modules at a slightly higher price but better quality? But it is always hard daatsheet find the simple error. HamRadio guys used this board apparently with good luck.

Did you mean speck as in piece of dirt or spec as in an inability of the Arduino to work correctly because of specification?