SMV1247-079LF

Overview

The SMV1247-079LF is a silicon hyperabrupt junction tuning varactor diode from Skyworks Solutions, designed for Voltage Controlled Oscillators (VCOs) requiring low tuning voltage operation. It features a single configuration in an SC-79 package with a series inductance of 0.7 nH. The device operates within a reverse voltage range up to 15 V and supports forward currents up to 20 mA. Electrical specifications include a typical capacitance of 7 pF at 0.3 V reverse bias and a minimum capacitance ratio of 9.5 between 0.3 V and 4.7 V. The component maintains a quality factor of 1500 at 3 V and 50 MHz, with a maximum series resistance of 6.0 Ω at 3 V and 500 MHz.

Feature Summary

• Utilizes a silicon hyperabrupt junction structure optimized for high capacitance ratios
• Engineered specifically for low tuning voltage applications in Voltage Controlled Oscillators
• Includes integrated SPICE model parameters for accurate circuit simulation

Applications

• Low tuning voltage Voltage Controlled Oscillators (VCOs)
• High-volume commercial RF systems

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm the SC-79 package and lead-free compliance status. Confirm Moisture Sensitivity Level 1 ratings and handling instructions prior to solder assembly. Ensure ESD precautions are strictly followed during storage and transport to prevent damage to the semiconductor junction.

Selection Notes

Select this component when a high capacitance ratio and superior Q-factor are required for precise frequency tuning. The 0.7 nH series inductance in the SC-79 package minimizes parasitic effects compared to larger packages. Verify that the 15 V reverse voltage rating aligns with the system's maximum operating bias requirements.

Part Context

This part belongs to the SMV1247-SMV1255 group of hyperabrupt junction tuning varactors. While sharing similar electrical characteristics and package options, each variant offers distinct capacitance values ranging from approximately 7 pF to 64 pF. The SMV1247 represents the lowest capacitance option within this specific family lineup.

Replacement Considerations

Direct substitutes within the same family include the SMV1248-079LF, SMV1249-079LF, SMV1251-079LF, SMV1253-079LF, and SMV1255-079LF. These alternatives share identical packaging and absolute maximum ratings but provide higher capacitance values.