MA46480-134

Overview

The MA46480-134 is a Gallium Arsenide hyperabrupt varactor diode from the MA464xx series, designed for VHF through Ka band applications. It features a constant gamma of 1.25 and is housed in an ODS-134 ceramic package. Key electrical specifications include a total capacitance of 3.7 pF at +/−10% tolerance (measured at VR = 4 V, f = 1 MHz) and a minimum junction capacitance ratio of 6.8 (VR = 2 V / 20 V). The device exhibits a minimum Q factor of 2000 at VR = 4 V and f = 50 MHz. It has a minimum breakdown voltage of 22 V and supports reverse voltages up to 20 V.

Feature Summary

• Constant gamma value of 1.25 enables more linear voltage-controlled oscillator frequency tuning compared to conventional hyperabrupt varactors.
• High quality factor (Q) performance permits excellent tuning efficiency across VHF to Ka band frequencies.
• Hyperabrupt junction design provides a large change in capacitance versus bias voltage for effective modulation sensitivity.

Applications

• Voltage tuned filters
• Analog phase shifters
• Modulator circuits

Procurement Notes

Verify the specific ordering suffix matches the required package style, as the MA464xx series is available in various ceramic packages and chip forms. Confirm RoHS compliance status if lead-free equivalents with 260°C reflow compatibility are required. Ensure the selected part number corresponds to the desired capacitance tolerance and matching requirements specified by the manufacturer.

Selection Notes

Select this component when a constant gamma of 1.25 is required for linear tuning characteristics. The 3.7 pF nominal capacitance and 22 V minimum breakdown voltage suit high-frequency VCO and filter designs. Consider the ODS-134 package parasitics if precise circuit simulation is needed, as total capacitance curves deviate slightly from chip values due to package effects.

Part Context

This device belongs to the MACOM MA464xx series of GaAs hyperabrupt varactor diodes. The series offers constant gamma values of 1.0, 1.25, and 1.5 to optimize circuit linearity. The MA46480 specifically falls within the gamma 1.25 subgroup, sharing common structural features with other parts in the family while differing in capacitance and gamma specifications.

Replacement Considerations

Other parts in the MA464xx series with gamma 1.25, such as MA4647x or MA4648x variants, may serve as alternatives if capacitance values align with design needs. Verify that substitute components maintain the required Q factor, breakdown voltage, and package compatibility for the specific application.