DDS AD9914DDS AD9914

DDS AD9914 Arduino Shield RF Signal Generator [1.4GHz @3.5GHz Core Clock, Low Spurs, Low Harmonic]

Units Sold: 12

 

DDS (Direct Digital Synthesis) Analog Devices AD9914
Arduino Shield Easy connection to Arduino MEGA 2560 without additional wires and converters
All functions of the DDS AD9914 are brought to the contacts of the Arduino MEGA
With this you can fully reveal all the capabilities of the DDS AD9914 Shield
PCB, Design, Schematics, Case and Software made by GRA & AFCH

 

$699.95$769.95

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DDS AD9914 Arduino RF Signal Generator Shield

 

DDS (Direct Digital Synthesis) Analog Devices AD9914 Arduino Shield by GRA & AFCH

Easy connection to Arduino MEGA 2560 without additional wires and converters

All functions of the DDS AD9914 are brought to the contacts of the Arduino MEGA

With this you can fully reveal all the capabilities of the DDS AD9914 Shield

Opensource Software available on our GitHub repository: https://github.com/afch/DDS-AD9914-Arduino-Shield

 

 

DDS AD9914
DDS AD9914

 

 

Listing includes:

 

  • AD9914 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 for AD9914 DDS Shield:

 

 

Key Benefits:

 

  • Convenient and fast control with an encoder.
  • Core overclocking up to 4 GHz (external reference clocking).
  • Low harmonics.
  • 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.
  • Temperature sensor.
  • Active fan cooling (due to the high heat dissipation of the AD9914, we had to install a fan).

 

 

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

 

  1. TCXO – 40MHz (Supports 10 – 50 MHz) 1 ppm external oscillator PLL up to 2560 MHz.
  2. REF CLK IN – external reference clock input, up to 4000 MHz (this source is NOT INCLUDED).

 

 

Features:

 

  • At the output is a transformer installed to reduce even harmonics.
  • Additionally balancing transformer is used for TCXO and REF CLK IN options.
  • Easy to connect OLED display.
  • Device control only with one encoder.
  • 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 core overclocking the AD9914 core up to 4000 MHz.
  • DDS AD9914 Shield has ability to generate a signal up to 1700 MHz with a core overclocking up to 4000 MHz (for frequencies above 1400 MHz output filter needs replacement).

 

 

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 AD9914, when designing our DDS AD9914 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 AD9914 Arduino Shield, You can focus on the data from the datasheet on the AD9914.

 

Figure 19 shows the noise level when using the built-in PLL in DDS:

 

And figure 19 shows the noise level when using an external reference clock 3500 MHZ, with the PLL off:

 

We realize that direct comparison of these graphs is incorrect, but nevertheless, on average, when offset from the carrier frequency by 10 kHz and using an external generator, the noise level is 20 dB less than when 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:

 

DDS AD9914 Arduino Shield
Main Screen

 

DDS AD9914 Arduino Shield
AD9914 Core Setup Menu

 

 

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

 

 

Specifications:

 

Frequency: 100 kHz – 1999 MHz @4000 MHz Core Clock, if using built-in PLL then DDS clock is limited to 2.64GHz and output frequency is 1.32GHz
Spurs max: -60 dBc
Frequency step: 1 Hz
Output power: 0 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 9-12V DC 1A
Output filter: LC 7-th order or On request, a ceramic filter with a different cutoff frequency and with lower losses can be installed
Reference clock sources (on choice): TCXO 40 MHz 1ppm Oscillator, or External Oscillator up to 4000 MHz
Size: 53.26 x 114mm

 

 

DDS AD9914 Arduino Shield Spectrograms:

DDS AD9914 Spectrum

DDS AD9914 100 MHz, TCXO 40 MHz x66 @ 2640 MHZ

 

DDS AD9914 Spectrum
DDS AD9914 1.0 GHz, TCXO 40 MHz x66 @ 2640 MHZ

 

In this graph you can see the fundamental frequency of 1.0 GHz and its mirror harmonic at 1.64 GHz, so clocking occurs at a frequency of 2.64 GHz (2.64 – 1.0 = 1.64). By default, our board has an output LC low-pass filter with a cutoff frequency of 1.5 GHz, so it cannot completely suppress the mirror harmonic at a frequency of 1.64 GHz, and besides, it attenuates the level of the fundamental frequency at a frequency of 1 GHz by 4 dB. (On request, a ceramic filter with a different cutoff frequency and with lower losses can be installed)

 

 

DDS Arduino Shield AD9914 RF Signal Generator:

 

DDS AD9914

DDS AD9914

 

 

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

 

 

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