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Product Detailed Parameters
- Description：DIODE VARICAP 12V SC79
- Series：-
- Mfr：Skyworks Solutions Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Capacitance @ Vr, F：9.8pF @ 2.5V, 1MHz
- Capacitance Ratio：2.7
- Capacitance Ratio Condition：C0.5/C2.5
- Voltage - Peak Reverse (Max)：20 V
- Diode Type：Single
- Q @ Vr, F：-
- Operating Temperature：-55°C ~ 125°C (TJ)
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- Package / Case：SC-79, SOD-523
- Supplier Device Package：SC-79
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Overview
The SMV1270-079LF is a silicon hyperabrupt junction varactor diode designed for battery-powered tuning circuits. It operates within a reverse voltage range of 20 V maximum and supports forward currents up to 20 mA. The device features a typical capacitance of 23.6 pF at 0.5 V and 8.6 pF at 2.5 V, yielding a capacitance ratio of 2.7. Series resistance is specified at 0.7 Ω at 470 MHz with 1 V reverse bias. Packaged in the SC-79 form factor, it includes an internal series inductance of 0.7 nH.
Feature Summary
- High capacitance ratio suitable for wideband tuning applications
- Ultra-small SC-79 package optimized for low-cost battery operation
- Low reverse voltage design appropriate for wireless systems
Applications
- Low-noise UHF and VHF VCOs
- Wideband VCOs operating above 2.5 GHz
- Battery-powered tuning circuits
Procurement Notes
Verify component authenticity through authorized Skyworks channels or certified distributors. Confirm RoHS compliance and lead-free status via official documentation. Check Moisture Sensitivity Level (MSL1) handling requirements before soldering. Ensure ESD precautions are strictly followed during storage and assembly to prevent damage.
Selection Notes
Select this component when designing low-voltage, battery-operated RF circuits requiring high capacitance ratios. Verify that the SC-79 package dimensions align with the target PCB layout. Ensure the operating frequency range falls within the specified electrical characteristics, particularly noting the 0.7 nH series inductance impact on performance.
Part Context
The SMV1270-079LF belongs to the SMV1270 series of hyperabrupt junction tuning varactors manufactured by Skyworks Solutions. This series is engineered specifically for wireless communication systems operating at frequencies up to and exceeding 2.5 GHz. The -079 suffix indicates the SC-79 surface-mount package configuration.
Replacement Considerations
SMV1270-040LF: Features SOD-882 packaging with lower series inductance (0.45 nH).
FAQ
What is the maximum reverse voltage rating?
The absolute maximum reverse voltage (VR) rating is 20 V.
What is the series inductance value?
The series inductance (LS) is 0.7 nH.
Is the device lead-free?
Yes, the 'LF' designation indicates a lead-free, RoHS-compliant package.
