SMV1233-079LF

Overview

The SMV1233-079LF is a silicon hyperabrupt junction tuning varactor diode from the Skyworks SMV123x series, housed in an SC-79 surface-mount package. It features a typical capacitance of 3.00 pF at 1 V reverse bias and 1.80 pF at 3 V reverse bias. The device supports a maximum reverse voltage of 15 V and a forward current of 20 mA. Its series resistance is specified as 1.20 Ω at 3 V and 500 MHz. Operating temperatures range from -55 °C to +125 °C, with storage capabilities up to +150 °C.

Feature Summary

• Designed for low tuning voltage Voltage Controlled Oscillators (VCOs) and high-Q resonators in wireless systems operating above 10 GHz.
• Utilizes a hyperabrupt junction profile to achieve a high capacitance ratio suitable for wide frequency tuning ranges.
• Engineered with low series resistance characteristics to minimize phase noise in RF oscillator applications.

Applications

• Low tuning voltage Voltage Controlled Oscillators (VCOs)
• High-Q resonators in wireless system VCOs
• High-volume commercial RF systems

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance and lead-free status by checking the datasheet revision and marking codes against official Skyworks documentation. Ensure handling procedures adhere to ESD precautions and moisture sensitivity level requirements during assembly.

Selection Notes

Select this component when a specific capacitance value near 3 pF at low reverse bias is required for hyperabrupt tuning profiles. Evaluate the trade-off between the 1.20 Ω series resistance and the 15 V breakdown voltage against circuit requirements. Compare performance metrics with other members of the SMV123x family if different capacitance ratios are needed.

Part Context

This part belongs to the SMV123x series of silicon hyperabrupt junction varactors manufactured by Skyworks Solutions. The series includes variants such as the SMV1231, SMV1232, and SMV1234, which offer different capacitance values while sharing similar packaging and electrical characteristics optimized for RF tuning applications.

Replacement Considerations

Direct substitutes within the same series include the SMV1232-079LF and SMV1234-079LF. These alternatives share the SC-79 package but differ in nominal capacitance and series resistance values. Verify that the alternative's capacitance ratio and breakdown voltage meet the specific design constraints before substitution.

FAQ

What is the typical capacitance ratio for the SMV1233-079LF?

The typical capacitance ratio (CT @ 1V / CT @ 3V) is 1.67, calculated from the typical values of 3.00 pF at 1 V and 1.80 pF at 3 V.

Is the SMV1233-079LF suitable for high-frequency operation?

Yes, the datasheet states that the low resistance of these varactors makes them appropriate for high-Q resonators in wireless system VCOs to frequencies over 10 GHz.

What is the maximum reverse voltage rating?

The absolute maximum reverse voltage (VR) rating is 15 V.