RFVC1844 Datasheet Summary

1. Overview:

️· The RFVC1844 is a Voltage Controlled Oscillator designed for various wireless and communication applications.
️· It offers multiple output frequencies (Fo, Fo/2, Fo/4).

2. Key Features/Specifications:

️· Frequency: Operates around 11.2 GHz (typical). Outputs are Fo (11.2 GHz), Fo/2 (5.6 GHz), and Fo/4 (2.8 GHz).
️· Supply Voltage:
- VCC_OSC: +5V (for the VCO core)
- VCC_DIG: +5V (for the frequency divider - can be grounded to disable the divider and reduce power consumption).
️· Control Voltage: VTUNE – used to adjust the output frequency (specific tuning range not detailed in the excerpt).
️· Package: Surface Mount (Dimensions detailed in the package drawing).
️· Outputs: Three RF outputs at Fo, Fo/2, and Fo/4. Internally DC-blocked.

3. Pinout (Important Pins):

️· VCC_OSC: +5V supply for VCO core.
️· VCC_DIG: +5V supply for frequency divider (optional).
️· VTUNE: Control voltage input to tune the VCO frequency.
️· RFOUT, RFOUT/2, RFOUT/4: RF output ports.
️· GND: Ground connection.
️· Many N/C (No Connection) pins.

4. Typical Performance (Graphs Provided):

️· The datasheet includes graphs (not fully transcribed here) showing performance characteristics such as output power vs. frequency, phase noise, and supply current.

5. Application Information:

️· Sample Application Circuit: Provides a basic schematic showing how to bias and connect the VCO.
️· Evaluation Board Layout: Illustrates a suggested PCB layout for evaluation and prototyping. Specifies components and a PCB identifier (VC183x410(D)).



In essence, the RFVC1844 is a relatively simple VCO that provides multiple output frequencies and is controlled by a voltage input. The datasheet is intended to assist engineers in integrating this VCO into their RF designs.