[AD9850] Ann fuller DDS signal module generator send 51 and 9850 STM32 procedures.

[AD9850] Ann fuller DDS signal module generator send 51 and 9850 STM32 procedures.
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  • Список ценUS $27.00piece
  • Продажная ценаUS $27.00piece
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This module has the spot, can be photographed directly.


This is a AD9850 chip produced by the DDS signal generator module, you need to use the microcontroller to use. We provide STM32 and C51 demo program.

Purchase of this module, you can provide technical support (note Oh, a lot of agents such modules businesses can not provide technical support).Therefore, please do not use hardware costs to measure the price of products.


The module supports 3.3V and 5V SCM system of the AD9850, and the MCU between serial and parallel interface 2.


prompt:In order to facilitate everyone to choose,The default row is not welded.


We will give a single row of 20P, by the customer\'s own choice is upward or downward welding welding.






The difference between this product and similar products:

  • With sine wave amplitude adjustment potentiometer, you can adjust the amplitude of the sine wave. Part of the factory\'s products without this function, the output sine wave amplitude is fixed.
  • Precision multi circle potentiometer is used to adjust the amplitude and duty cycle, and the regulation is more precise. Part of the manufacturers of products using a single loop potentiometer, a little move, the parameters are very far.
  • Automatic recognition of serial interface and parallel interface in two modes,Without additional jumper settings.
  • The use of dedicated voltage regulator chip as a reference voltage, so that the square wave output more stable. The square wave output of AD9850 is obtained by comparing the sine wave with the built-in high speed comparator. The reference voltage of the comparator determines the duty cycle of Fang Bo, and the stability of the reference voltage also determines the stability of Fang Bo. Other products directly through the resistance by the VCC power divider. If the VCC voltage fluctuation, it is bound to lead to square wave jitter. We adopt a dedicated voltage regulator reference chip, which is Fang Bo\'s duty cycle is not affected by the fluctuations of VCC power.
  • Automatic placement, reflow soldering process, stable performance, reliable quality
  • Send schematic, 51 program, STM32 program, user manual, AD9850 Application Manual



Main functional features:
* module capable of outputting sine wave and Fang Bo

2 way sine wave, 2 wave is the reverse of the waveform

2 square wave output, 2Waveform is inverted

* output sine wave index:

Frequency:0-40MHz (the frequency of the waveform by the single chip program to send commands to control)

Amplitude: 80mV~2V (waveform amplitude by potentiometer adjustment)


* output Fang Bo indicator:

Frequency:0-40MHz (and sine wave frequency synchronization)

Amplitude: with AD9850 power supply voltage


Duty cycle: 2%~98% (The duty cycle of the waveform is adjusted by the potentiometer.)

* the output of the sine wave 1 passes through the 70MHz low pass filter, and the waveform of the SN is better than that of the


* sine wave 2 without filter output, easy for users to deal with their own





The rear of the module has a clear screen, indicate the definitions for each row, which greatly facilitates the user connection.

The module has 2 interfaces, and the parallel mode requires 13 wires. The serial mode only needs 6 lines.





Each module is tested before leaving the factory, the following is the output of the waveform 1MHz screenshotaeProduct.getSubject()


51 single chip connection method:

1, serial and parallel mode switching on program operation automatic switching of different IO. No hardware switch.

2, 51 single chip serial mode wiring (6 lines):

VCC ----> +5V
----> GND; land
W_CLK ----> P2.2
FU_UD ----> P2.1
RESET ----> P2.0
D7 ----> P1.7

3, 51 MCU parallel connection mode (13 lines):

VCC ----> +5V
----> GND; land
W_CLK ----> P2.2
FU_UD ----> P2.1
RESET ----> P2.0
D7 ----> P1.7
D6 ----> P1.6
D5 ----> P1.5
D4 ----> P1.4
D3 ----> P1.3
D2 ----> P1.2
D1 ----> P1.1
D0 ----> P1.0

4, STM32 serial port mode access method

[AD9850] [STM32 module pin line]
VCC ----------- 3.3V
GND ----------- GND
RESET ----------- PA6)
W_CLK ----------- PA5
FQ_UD ----------- PG11
D7 ----------- PA7


STM32Programming tips:

  • First call AD9850_InitHard (); initialize the GPIO STM32.
  • Then call the AD9850_WriteCmd (0, 1000000) function to set the output frequency, first parameters to fill 0, second parameters expressed the frequency value, unit Hz, 1000000, 1MHz. This parameter is a Double type, double precision floating point, support 0.1 or 0.01 of this floating point parameter.