AD9850 DDS Signal Generator Module
AD9850 DDS Signal Generator Module is one of the small, low-cost boards to generate analog signals. This integrated board can be controlled through a microcontroller and can be digitally programmed using Direct Digital Synthesis Technology (DSS).
AD9850 DDS Signal Generator Module is equipped with an AD9850 IC, a powerful Oscillator of 125MHz, and a DSS synthesizer. It operates at a very low power supply, thus finding applications in many small self-assembly projects to produce square and sine waves.
AD9850 Pinout
The following diagram shows the pinout of the AD9850 DDS Signal Generator Module:
Pin Configuration
Let us discuss the pinout of the AD9850 Signal Generator Module. The pin configuration detail in tabular is mentioned below:
Pin Name Function
VCC Supply pin
D0-D7 Data input pin
GND Reference potential pin
W-CLK Word Load Clock pin
FQ-UD Frequency Update pin
Data Serial data input through D7 pin
Reset Master reset pin
Sine-Wave 1 DAC Current Output pin
Sine-Wave 2 DAC Current Output pin
Square-Wave 1 DAC Complementary Output pin
Square-Wave 2 DAC Complementary Output pin
• Input/Output pins: These are 8-bit data pins used to load data up to 32-bit frequency and 8-bit phase/control word. D7(MSB) also serves the purpose of loading a 40-bit serial data word.
• W-CLK: A Word Load Clock is used to synchronize and load words serially or through parallel transmission.
• FQ-UD: Frequency Update is used to update the frequency in the input data register when the clock has a rising edge. After updating, it reset the pointer to the word 0
• DATA: This pin is connected to the D7 input pin. It is used to load serial data.
• RESET: A master RESET is used to clear all the registers except for the IC’s input register by putting it into a HIGH state. Moreover, the outputs of DAC will be converted to Cosine 0 after some clocks.
AD9850 Features and Specifications
• Operating Voltage: 3.3 – 6 Volts
• Oscillator Frequency: 125 MHz
• Output Frequency: 0 – 40 MHz
• Operational Temperature: -40 – 850C
• Source/Sink Continuous Current: 0.005 Amperes
• DAC Current: 0.03 Amperes
• Power Dissipation(125 MHz, 5V): 380 mWatts
• Power Dissipation(110 MHz, 3.3V): 110 mWatts
Detailed Features
• DAC with Spurious Free Dynamic Range to specify the generator’s performance
• It contains a power-down function for a short boot time.
• Data transmission can either be parallel or serial.
• Power Dissipation depends on the power supply voltage.
• Four Analog signal outputs i.e., Sine-Wave 1, Sine-Wave 2, Square-Wave 1, and Square-Wave 2
• A comparator to generate less jittering in square wave output
• Direct Digital Synthesizer is based on CMOS Technology for better functionality and performance.
• A small high-performance module with a surface-mount package to be operated at industrial temperature
AD9850 SGM Schematic Diagram
The schematic of the module is provided to understand the connections which may turn helpful while repairing the module:
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