ZMV930TA

Overview

The ZMV930TA is a silicon hyperabrupt varactor diode manufactured by Diodes Incorporated, designed for frequency control and filtering applications. It features closely controlled capacitance-voltage (C-V) characteristics and high quality factor (Q). The device operates with an octave tuning range from 0 to 6V and exhibits low reverse current, typically 200pA, ensuring excellent phase noise performance. Electrical specifications include a maximum reverse voltage of 12V and a minimum Q of 200 at 4V and 50MHz. Capacitance values are specified as 8.70pF max at 1V, 5.50pF max at 2.5V, and 2.90pF max at 4V. The component is available in miniature surface mount packages including SOT-23.

Feature Summary

• Octave tuning capability across a 0 to 6V range
• Low reverse leakage current for reduced phase noise
• High quality factor (Q) performance
• Tightly controlled capacitance-voltage characteristics

Applications

• Voltage Controlled Crystal Oscillators (VCXO)
• Temperature Compensated Crystal Oscillators (TCXO)
• Wireless communications systems
• Mobile radio equipment

Procurement Notes

Verify the manufacturer designation carefully, as the ZMV930 series was originally produced by Zetex Semiconductors plc before being acquired by Diodes Incorporated. Confirm that the specific ordering suffix TA corresponds to the 7-inch reel packaging format containing 3,000 units per reel. Ensure compliance with the absolute maximum ratings, particularly the 12V reverse voltage limit and power dissipation constraints for the SOT-23 package.

Selection Notes

Select the ZMV930TA when design requirements demand high Q factors and low phase noise in frequency control circuits. The hyperabrupt junction profile provides significant tuning range compared to standard abrupt varactors. Consider the specific capacitance tolerances at operating voltages to ensure oscillator stability. Verify that the SOT-23 package dimensions fit the intended PCB layout constraints.

Part Context

The ZMV930TA belongs to the ZC930, ZMV930, and ZV931 series of silicon 12V hyperabrupt varactor diodes. This family includes variants such as ZC930, ZMV931, and ZV933, offering different capacitance ranges while maintaining similar electrical profiles. The series is engineered for miniature surface mount applications, providing options in SOT-23, SOD323, and SOD523 packages to suit various space-constrained designs.

Replacement Considerations

Direct substitutes within the same series include ZC930TA and ZMV930TA, which share identical electrical characteristics and pinouts. Other series members like ZMV931TA or ZMV932TA offer different capacitance values but maintain the same package and general performance attributes. Cross-reference datasheets to confirm compatibility with specific circuit tuning requirements.