MA46471-134

Overview

The MA46471-134 is a Gallium Arsenide (GaAs) hyperabrupt junction varactor diode from the MA464xx series, designed for VHF through Ka band applications. It features a constant gamma value of 1.25, enabling more linear voltage-controlled oscillator frequency tuning compared to conventional hyperabrupt varactors. The device offers high quality factors up to 4000 at -4 Volts and nearly constant modulation sensitivity. Electrical specifications include a total capacitance of 0.7 pF ±10% at VR = 4 V and f = 1 MHz, with a minimum Q of 4000 at 50 MHz. Breakdown voltage is 22 V min, and reverse leakage current is 100 nA max at 18 V.

Feature Summary

• Constant gamma value of 1.25 for improved linearity in VCO frequency tuning
• High Q factor up to 4000 at -4 Volts for excellent tuning performance
• Hyperabrupt junction characteristic providing large capacitance change versus bias voltage
• Lead-free RoHS compliant construction with 260°C reflow compatibility

Applications

• Voltage tuned filters
• Analog phase shifters
• Modulator circuits
• VHF through Ka band tuning applications

Procurement Notes

Verify component authenticity by cross-referencing the MACOM datasheet DC-0007686 Rev. V10. Confirm package style matches requirements, as parasitic capacitance affects total capacitance values. Ensure operating conditions remain within absolute maximum ratings to prevent permanent damage. Check for lead-free equivalents if specific thermal processing constraints apply.

Selection Notes

Select based on required gamma value; this model provides 1.25 for balanced linearity. Consider total capacitance tolerance of ±10% and matching availability. Evaluate package parasitics, as Cp and Ls vary by case style and impact performance curves. Verify breakdown voltage and reverse leakage limits against circuit biasing requirements.

Part Context

Part of the MA464xx series offering constant gamma values of 1.0, 1.25, and 1.5. The 1.25 gamma group includes MA4647x and MA4648x series parts. Available in ceramic packages and chip form. Designed for high-performance RF tuning where linearity and Q factor are critical.

Replacement Considerations

Other MA4647x series parts share similar characteristics but differ in capacitance values. MA46470 has 0.5 pF, while MA46472 has 1.0 pF. Gamma remains 1.25 across the series. Package selection influences electrical performance due to varying parasitic elements.

FAQ

What is the constant gamma value for the MA46471?

The MA46471 belongs to the MA4647x series, which features a constant gamma value of 1.25.

How does package parasitic capacitance affect performance?

Package parasitic capacitance (Cp) causes the total capacitance versus bias voltage curve to deviate slightly from the unpackaged chip curve. Values listed are typically for Case Style 30 unless specified otherwise.

What is the minimum breakdown voltage?

The minimum breakdown voltage is 22 V, measured at a reverse current of 10 µA.