ZMV933ATA

Overview

The ZMV933ATA is a silicon hyperabrupt varactor diode manufactured by Diodes Incorporated, distributed under the Zetex brand. It is housed in an SOD-323 surface-mount package with two pins. The device features closely controlled capacitance-voltage characteristics and high Q factors for frequency control applications. At a reverse voltage of 1V, the nominal capacitance is 42pF, while at 4V it drops to approximately 12pF. The minimum Q factor is specified as 150 at 4V and 50MHz. It operates with a maximum reverse voltage of 12V and has a power dissipation rating of 330mW at 25°C ambient temperature.

Feature Summary

• Octave tuning capability across a 0 to 6V range
• Low reverse current ensuring excellent phase noise performance
• High Q factor for efficient filtering
• Miniature surface mount packaging

Applications

• VCXO and TCXO circuits
• Wireless communications systems
• Pagers
• Mobile radio equipment

Procurement Notes

Verify the manufacturer origin carefully, as this component is part of the Zetex portfolio now managed by Diodes Incorporated. Confirm the specific ordering suffix matches the required reel size (TA for 7-inch or TC for 13-inch) to ensure correct tape and reel specifications during acquisition.

Selection Notes

Select this component when precise capacitance tolerance and low phase noise are critical for oscillator stability. Ensure the operating environment stays within the specified thermal limits, noting the distinct power dissipation ratings between SOT23, SOD323, and SOD523 packages if alternative form factors are considered.

Part Context

This part belongs to the ZC930, ZMV930, and ZV931 series of silicon hyperabrupt varactor diodes. The series offers single or dual common cathode formats in various miniature packages including SOT23, SOD323, and SOD523, designed for frequency control and filtering tasks.

Replacement Considerations

Direct substitutes within the same series include ZMV933TA and ZC933TA. For different package requirements, consider ZV933V2TA which utilizes the SOD523 footprint while maintaining similar electrical characteristics.

FAQ

What is the typical reverse leakage current for the ZMV933ATA?

The typical reverse leakage current is 200pA, contributing to its low phase noise performance.

How does the capacitance change with reverse voltage?

The capacitance decreases as reverse voltage increases, dropping from a maximum of 42pF at 1V to a minimum of 12pF at 4V.

What is the maximum power dissipation for the SOD323 package?

The maximum power dissipation for the SOD323 package is 330mW at an ambient temperature of 25°C.