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Product Detailed Parameters
- Description：DIODE VARACTOR 15V 20MA
- Series：-
- Mfr：Skyworks Solutions Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Capacitance @ Vr, F：1.7pF @ 4.7V, 50MHz
- Capacitance Ratio：12
- Capacitance Ratio Condition：C0.3/C4.7
- Voltage - Peak Reverse (Max)：15 V
- Diode Type：Single
- Q @ Vr, F：700 @ 3V, 50MHz
- Operating Temperature：-
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- Package / Case：SOD-882
- Supplier Device Package：SOD-882
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Overview
The SMV1248-040LF is a silicon hyperabrupt junction tuning varactor diode designed for low tuning voltage Voltage Controlled Oscillators (VCOs). It features a typical capacitance of 17 pF at 0.3 V and 1.7 pF at 4.7 V, yielding a capacitance ratio of 12. The device operates with a maximum reverse voltage of 15 V and supports an operating temperature range from -55°C to +125°C. Packaged in the SOD-323 outline, it offers high Q performance and is available in tape and reel format.
Feature Summary
- Hyperabrupt junction design optimized for low tuning voltage VCO applications
- High capacitance ratio of 12 typical between 0.3 V and 4.7 V
- RoHS compliant lead-free packaging rated MSL1 at 260 °C
Applications
- Low tuning voltage Voltage Controlled Oscillators (VCOs)
- High-volume commercial RF systems
Procurement Notes
Verify the specific ordering suffix matches the required package type, as the SMV1248 series utilizes multiple outlines including SC-79, SOT-23, and SOD-323. Confirm that the 'LF' designation aligns with lead-free manufacturing requirements. Ensure ESD handling precautions are strictly followed during storage and assembly to prevent damage to the sensitive semiconductor junction.
Selection Notes
Select this component when a higher nominal capacitance than the SMV1247 is required for VCO designs. The 17 pF typical value at 0.3 V suits circuits needing broader tuning ranges or lower frequency operation compared to smaller capacitance variants. Verify that the 15 V reverse voltage rating meets the circuit's peak reverse bias requirements.
Part Context
This part belongs to the Skyworks SMV1247-SMV1255 series of silicon hyperabrupt junction varactors. These devices are characterized for capacitance and resistance over temperature and include SPICE models for simulation. The series provides various capacitance options within identical package footprints to facilitate standardized board layouts across different product families.
Replacement Considerations
SMV1248-079LF
FAQ
What is the typical capacitance ratio for the SMV1248-040LF?
The typical capacitance ratio (CT @ 0.3 V / CT @ 4.7 V) is 12.
Is the SMV1248-040LF RoHS compliant?
Yes, the 'LF' suffix indicates the device is lead-free and RoHS compliant.
What is the maximum operating temperature for this varactor?
The maximum operating temperature is +125 °C.
