SMV1249-040LF

Overview

The SMV1249-040LF is a silicon hyperabrupt junction tuning varactor diode from the SMV1247-SMV1255 series, manufactured by Skyworks Solutions Inc. It is designed for Voltage Controlled Oscillators (VCOs) requiring low tuning voltage operation. The device is housed in an SOD-882 surface-mount package with a typical series inductance of 0.45 nH. Key electrical specifications include a reverse voltage rating of 15 V and a forward current limit of 20 mA. At 0.3 V reverse bias, the capacitance ranges from 28.0 pF to 31 pF, while at 4.7 V it drops to between 2.6 pF and 2.8 pF. The typical capacitance ratio (C0.3V/C4.7V) is 12. The component operates within a temperature range of -55°C to +125°C.

Feature Summary

• Utilizes a silicon hyperabrupt junction structure optimized for high capacitance ratios
• Engineered specifically for low tuning voltage applications in Voltage Controlled Oscillators
• Compliant with RoHS standards and halogen-free Green packaging

Applications

• Low tuning voltage Voltage Controlled Oscillators (VCOs)
• High-volume commercial wireless systems
• High-Q resonator circuits

Procurement Notes

Verify the specific ordering suffix against official Skyworks documentation to confirm the package type and compliance status. Confirm Moisture Sensitivity Level 1 (MSL1) ratings prior to soldering assembly. Ensure electrostatic discharge handling precautions are strictly followed during storage and transport to prevent damage.

Selection Notes

Select this component when a high initial capacitance value near 31 pF is required compared to other members of the SMV1247-SMV1255 family. The SOD-882 package offers a compact footprint suitable for dense surface mount layouts. Evaluate the 0.45 nH series inductance against circuit requirements for phase noise performance.

Part Context

This part belongs to the SMV1247-SMV1255 group of hyperabrupt junction tuning varactors. Within this series, the SMV1249-040LF provides higher baseline capacitance than lower-numbered variants like the SMV1247, making it suitable for different frequency tuning ranges. All devices in the group share similar absolute maximum ratings and operating temperature limits.

Replacement Considerations

SMV1249-011LF: Identical electrical characteristics but packaged in SOT-23 format.