The **CRO2170B-LF** is a high-performance **Voltage Controlled Oscillator (VCO)** manufactured by Skyworks Solutions (formerly Z-Communications). It is primarily designed for high-frequency signal generation in telecommunications and radio systems. --- ### 1. Key Technical Specifications The following table outlines the core electronic parameters for the CRO2170B-LF: | Parameter | Specification | Unit | | :--- | :--- | :--- | | **Oscillation Frequency Range** | 2150 to 2190 | MHz | | **Tuning Voltage (V_tune)** | 0.5 to 4.5 | Vdc | | **Supply Voltage (Vcc)** | 5.0 | Vdc | | **Supply Current (Icc)** | 22 (Typical) | mA | | **Output Power** | 3 ± 3 | dBm | | **Phase Noise (at 10 kHz offset)** | -110 (Typical) | dBc/Hz | | **Harmonic Suppression (2nd)** | -15 (Typical) | dBc | | **Operating Temperature** | -40 to +85 | °C | --- ### 2. Functional Characteristics #### Coaxial Resonator Oscillator (CRO) Technology Unlike standard LC-based oscillators, the "CRO" prefix indicates that this part utilizes a **Coaxial Resonator**. This technology provides: * **High Q Factor:** Results in significantly lower phase noise compared to standard VCOs. * **Frequency Stability:** Better resistance to temperature drifts and mechanical vibrations. #### Tuning Sensitivity The device features a tuning sensitivity of approximately **15 MHz/V**. This means for every 1-volt change in the control voltage, the output frequency shifts by roughly 15 MHz, allowing for precise frequency synthesis in Phase Locked Loops (PLLs). #### RoHS Compliance The **-LF** suffix stands for **Lead-Free**, indicating the part complies with RoHS environmental standards for soldering and hazardous substances. --- ### 3. Pin Configuration & Application The device is typically housed in a **MINI-16-LOW** surface-mount package. The critical connections include: * **Vt (Tuning Voltage):** Input pin to control the output frequency. * **Vcc (Supply):** Provides the DC power required for the internal transistor and buffer. * **RF Out:** The high-frequency signal output (usually matched to 50 Ohms). * **GND:** Multiple ground pins for thermal dissipation and RF shielding. ### Common Applications 1. **Fixed Wireless Access:** Used in base stations and wireless infrastructure. 2. **Satellite Communications:** Signal up/down conversion. 3. **Test Equipment:** Local oscillator in signal generators and spectrum analyzers.