SMV1248-079LF

Overview

The SMV1248-079LF is a silicon hyperabrupt junction tuning varactor diode from the SMV1247-SMV1255 series, designed for low tuning voltage Voltage Controlled Oscillators (VCOs). It features a typical capacitance ratio of 12 at C0.3V/C4.7V and operates within a reverse voltage range up to 15 V. The device provides a typical capacitance of 17 pF at 0.3 V and 1.70 pF at 4.7 V, with a series resistance of 3.3 Ω at 500 MHz under 3 V bias. Packaged in SC-79 with an inductance of 0.7 nH, it supports operating temperatures from -55 °C to +125 °C.

Feature Summary

• Hyperabrupt junction design optimized for low tuning voltage VCO applications
• High capacitance ratio capability for wide frequency tuning ranges
• Moisture Sensitivity Level 1 rated for standard lead-free soldering processes

Applications

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

Procurement Notes

Verify component authenticity through authorized Skyworks channels or certified distributors. Confirm RoHS compliance status via the manufacturer's Certificate of Conformance. Ensure proper ESD handling protocols are maintained during storage and assembly to prevent damage to the sensitive semiconductor junction.

Selection Notes

Select this component when a high capacitance ratio is required for broad tuning bandwidth in VCO designs. Verify that the 15 V reverse voltage rating aligns with the circuit's maximum bias requirements. Consider the 0.7 nH package inductance impact on high-frequency performance relative to alternative packages like SOD-323.

Part Context

This part belongs to the SMV1247-SMV1255 family of hyperabrupt junction varactors. While sharing similar packaging and general characteristics, specific electrical parameters such as capacitance values and ratios vary across the series. The SMV1248-079LF specifically offers intermediate capacitance levels compared to higher-capacitance siblings like the SMV1255.

Replacement Considerations

Direct substitutes within the same series include SMV1247-079LF and SMV1249-079LF. Selection depends on matching specific capacitance ratios and absolute capacitance values required by the circuit design. Cross-package replacements require verification of parasitic inductance differences.