Elecbee ADF4351-OLED 35MHz-4.4GHz RF Signal Generator Module PLL Synthesizer Sweep Source 0.1MHz Step SMA 5V

ADF4351-OLED 35MHz-4.4GHz RF Signal Generator Module

The Elecbee ADF4351-OLED is a broadband PLL frequency synthesizer and RF signal generator module designed for point-frequency output, frequency sweeping, frequency hopping and output-power adjustment. Its integrated OLED display and control buttons allow direct operation without requiring a separate host controller.

Technical Specifications

• Brand: Elecbee
• Model: ADF4351-OLED
• Product type: Broadband PLL frequency synthesizer and RF signal source
• Frequency range: 35MHz to 4.4GHz
• Fundamental VCO frequency range: 2.2GHz to 4.4GHz
• Frequency functions: Point frequency, sweep frequency and frequency hopping
• Frequency control step: 0.1MHz
• Sweep frequency step: 0.1MHz to 999.9MHz, adjustable by buttons
• Sweep time step: 1ms to 9999ms, adjustable by buttons
• Maximum output power: Up to 7dBm; actual output varies by frequency
• Output-power settings: 0dB, -3dB, -6dB and -9dB
• Output channels: 2 differential channels
• Output impedance: 50Ω
• RF interfaces: SMA
• SMA treatment: Plated construction with specified 24-hour salt-spray resistance
• Communication protocol: SPI
• Reference frequency: 100MHz; external clock input supported
• Reference input amplitude: 700mVpp minimum at 0dB
• Frequency stability: Greater than 25ppm, according to the supplied specification
• Phase noise: Varies according to output frequency
• Supply voltage: 5V DC; must not exceed 6V
• Maximum operating current: 220mA
• Indicators: Red power indicator and blue PLL-lock indicator
• Operating temperature: 0°C to 75°C, commercial grade
• PCB dimensions: 88 × 67 × 7mm
• Module weight: 35g

Wideband PLL Frequency Generation

The integrated VCO generates fundamental frequencies from 2.2GHz to 4.4GHz. Internal divide-by-2, 4, 8, 16, 32 and 64 circuits extend the RF output range down to 35MHz, supporting wideband signal-generation and sweep-source applications.

Output Waveform Characteristics

Outputs from 35MHz to 2.2GHz are generated through frequency division and produce a square-wave-like waveform with harmonic content. An external filter is required when a sinusoidal waveform is needed in this frequency range. Outputs from 2.2GHz to 4.4GHz are fundamental-frequency sine waves.

Sweep and Power Control

The module provides 0.1MHz frequency-control resolution, adjustable sweep steps from 0.1MHz to 999.9MHz and sweep-time settings from 1ms to 9999ms. Four output-power settings allow the RF level to be adjusted to 0dB, -3dB, -6dB or -9dB.

RF Testing Applications

The module is suitable for RF signal generation, sensor excitation, transmission-line loss and attenuation testing, scanning clock generation, communication experiments, laboratory development and compatible radio-frequency test systems.

Operation and Integration Notes

Use a regulated linear 5V power supply to reduce unwanted interference. Do not reverse the power polarity or apply more than 6V. Connect the output to compatible 50Ω instruments using good-quality SMA coaxial cables. The supplied code does not include USB communication software, MCU tutorials or host-computer control functions; these functions require user development.