DDS AD9959DDS AD9959DDS AD9959

DDS AD9959 Arduino Shield RF Signal Generator 4 Synchronized DDS Channels [225MHz, @600 MHz Core Clock, Low Spurs, Low Harmonic]

Units Sold: 31

 

DDS (Direct Digital Synthesis) Analog Devices AD9959 4 Synchronized DDS Channels
Arduino Shield Easy connection to Arduino MEGA 2560 without additional wires and converters
All functions of the DDS AD9959 are brought to the contacts of the Arduino MEGA
With this you can fully reveal all the capabilities of the DDS AD9959 Shield
PCB, Design, Schematics, Case and Software made by GRA & AFCH

 

$139.95$199.95

Clear
SKU: gra_35752 Category: Tags: , ,

DDS AD9959 4 Synchronized channels Arduino RF Signal Generator Shield

 

DDS (Direct Digital Synthesis) Analog Devices AD9959 Arduino Shield by GRA & AFCH

Easy connection to Arduino MEGA 2560 without additional wires and converters

All functions of the DDS AD9959 are brought to the contacts of the Arduino MEGA

With this you can fully reveal all the capabilities of the DDS AD9959 Shield

Opensource Software available on our GitHub repository: https://github.com/afch/DDS-AD9959-Arduino-Shield

Video review on our YouTube channel : https://www.youtube.com/watch?v=HpigQwjc9mg&feature=youtu.be

 

 

DDS AD9959

 

Listing includes:

 

  • AD9959 DDS Shield Board
  • OLED Display (optional, choose in selector)
  • Arduino MEGA Board (optional, choose in selector)
  • Clock Source (optional, choose in selector)

 

 

We recommend RF Amplifier and Low-Pass Filter for AD9910 DDS Shield:

Low-Pass Filter LPF 7th Order Elliptical 1-1000Mhz 3.5, 7, 14, 28, 144, 433MHz etc for RF Amlifier, Receiver, Transmitter, Mixer, Transceiver, Antenna.

RF Amplifier 8-2000 MHz, GAIN = 20 dB, P = +20 dBm MMIC MRFA89 SOT-89

 

 

Key Benefits:

 

  • Convenient and fast control with an encoder.
  • 4 synchronized DDS channels 225MHz @ up to 600 MSPS
  • Low harmonics no more than -60 dBc. An output RF transformer is used for the correct operation of the current mirror.
  • Small spurs.
  • 4 layer board. Signal lines TOP and Bottom, inner layers Ground and Power.
  • Low Noise LDO Stabilizers.
  • Separate power supply for all analog and digital lines (1.8V and 3.3V), 5 pcs IC voltage stabilizers are used. Additionally, there is an RF Ferrite bead interchange.
  • High-speed decoupling Level converter and TTL 5V matching.

 

Types of possible reference oscillators (choose one of them in the selector):

 

  1. XO – Crystal 25 MHz 20 ppm internal oscillator with PLL up to 600 MHz.
  2. TCXO – 40MHz (Supports 10 – 50 MHz) 1 ppm external oscillator PLL up to 600 MHz.
  3. REF CLK IN – external reference clock input, up to 600 MHz. (this source is NOT INCLUDED).

 

Features:

 

  • At the output of each channel is a transformer to reduce even harmonics.
  • Additionally balancing transformer is used for XO, TCXO and REF CLK IN options.
  • Easy to connect OLED display.
  • Device control with one encoder and one button.
  • The synthesizer is capable to generate sine wave.
  • The software allows you to select and configure the frequency of the clock generator through the user menu (without the need to recompile the program).
  • Any settings can be stored in non-volatile EEPROM memory (located at Arduino Mega).
  • Basic settings are applied and saved automatically.
  • This shield support overclocking the AD9959 core up to 600 MHz.
  • DDS AD9959 Shield has ability to generate a signal up to 225 MHz with a core overclocking up to 600 MHz (to suppress harmonics, it is recommended to  overclock the AD9959 for frequencies above 200 MHz).

 

Phase Noise

This parameter is very important and interesting for those who buy DDS.
Since the intrinsic phase noise of DDS is obviously less than that of PLL generators, the final value is highly dependent on the clock source. In order to achieve the values stated in the datasheet on AD9959, when designing our DDS AD9959 Arduino Shield, we strictly adhered to all recommendations from Analog Devices: PCB layout in 4 layers, separate power supply of all 4 power lines (3.3 V digital, 3.3 V analog, 1.8 V digital, and 1.8 V analog). Therefore, when buying our DDS AD9959 Arduino Shield, You can focus on the data from the datasheet on the AD9959.

Figure 18 shows the noise level when using the built-in PLL in DDS. The PLL multiplies the frequency of a 25 MHz generator by 20 times. We use a frequency – 40 MHz (x12 Multiplier) or 50 MHz (x10 Multiplier) from TCXO which gives even more stability.

And figure 16 shows the noise level when using an external reference clock 500 MHZ, with the PLL off.

Comparing these two plots, for example, for Fout = 40.1 MHz and the internal PLL turned on at 10 kHz carrier offset, the phase noise level is -127 dBc @ 10 kHz. And with the PLL off and using external clocking, the phase noise is 155 dBc @ 10kHz. That is, when using an external clock phase noise by 28 dBc better (lower).

For the same frequency Fout = 40.1 MHz, and the internal PLL turned on at 1 MHz carrier offset, the phase noise level is -130 dBc @ 1 MHz. And with the PLL off and using external clocking, the phase noise is 160 dBc @ 1 MHz. That is, when using an external clock phase noise by 30 dBc better (lower).

Conclusion: when using external clocking, You can get much lower phase noise than using the built-in PLL. But do not forget that in order to achieve such results, increased requirements are put forward to the external generator.

OLED Display Menus:

 

Main Screen
Core Clock Setup Menu

 

Dear customers!
If you have ANY questions, PLEASE ASK us.

Specifications:

 

Frequency: 100 kHz – 225 MHz (@600 MHz Core Clock) in 1 Hz step
Spurs max: -60 dBc
Frequency step: 1 Hz
Output power: -7 dBm to -60 dBm (on 50 Ohm load)
Output level up to: 0.282 Vpeak-to-peak (at -7 dBm)
Power Supply: USB or External Power Supply 5 – 7V DC 1A
Output filter: 7-th order
Phase range: 0 to 360 Degrees in 0.1 Degree Step
Reference clock sources (on choice): XO-Crystal Oscillator, TCXO 1ppm Oscillator, or External Oscillator up to 600 MHz
Size: 53.26 x 102mm

 

 

DDS AD9959 Arduino Shield Spectrograms:

 

GRA & AFCH DDS AD9959 Shield External Clock Source VS Internal Clock Source Comparison:

DDS AD9959 100 kHz
DDS AD9959 100 kHz Marconi 2023@600MHz VS TCXO 40 MHz x12@600 MHZ
DDS AD9959 10 MHz
DDS AD9959 10 MHz Marconi 2023@600MHz VS TCXO 40 MHz x12@600 MHZ
DDS AD9959 100 MHz
DDS AD9959 100 MHz Marconi 2023@600MHz VS TCXO 40 MHz x12@600 MHZ
DDS AD9959 225 MHz
DDS AD9959 225 MHz Marconi 2023@600MHz VS TCXO 40 MHz x12@600 MHZ

 

GRA & AFCH DDS AD9959 Shield Oscillogram:

DDS AD9959 All 4 Channels Outputs Shifted on 90 Degrees.
DDS AD9959 All 4 Channels Outputs Shifted on 90 Degrees.

 

Arduino MEGA to Shield AD9959 Pinout Scheme:

 

Block Scheme DDS AD9959 V1.1
Block Scheme DDS AD9959 V1.1

 

DDS Arduino Shield AD9959 RF Signal Generator Overview:

 

 

DDS Arduino Shield AD9959 RF Signal Generator:

 

 

 

Dear customers!
If you have ANY questions, PLEASE ASK us.

 

 

 

Shipping and Return information

 

All Items are shipped from Ukraine
Via International registered Airmail
Shipments are made within 1 business day
After the payments are received and verified
It takes about 4-7 days via UPS Express delivery
It takes about 10-18 days via Standerd shipping
It takes about 35-45 days via Economy shipping
We combine multiple Items to save on shipping

 

 

 

UPS Express Shipping time (recommended):

Europe: 3-5 days
Germany: 3-5 days
USA, Canada: 4-7 days
Asia, South America: 5-7 days
Australia, New Zeland: 5-7 days
Africa, Central America: 5-7 days

 

 

Standard Shipping time:

Europe: 10-12 days
Germany: 10-12 days
USA, Canada: 10-15 days
Asia, South America: 10-18 days
Australia, New Zeland: 12-18 days
Africa, Central America: 12-18 days

 

 

Economy Shipping time:

Europe: 25-30 days
Germany: 25-30 days
USA, Canada: 30-35 days
Asia, South America: 35-45 days
Australia, New Zeland: 45-55 days
Africa, Central America: 45-55 days

 

 

 

Return Policy

All Returns are accepted

  • For Return you should contact Us within 14 Days after receiving the Item
  • Refunds are made as Money back or Replacements (buyer’s choice)
  • Return Shipments are paid by the buyer
  • No restocking fees are charged

 

 

You may also like…