ZMV934TA

Overview

The ZMV934TA is a silicon hyperabrupt varactor diode designed for frequency control and filtering applications. It features closely controlled capacitance-voltage characteristics, enabling octave tuning from 0 to 6V. The device exhibits low reverse current, typically 200pA, which ensures very low phase noise performance. Key electrical parameters include a maximum reverse voltage of 12V and a minimum Q factor of 80 at 50MHz. Capacitance values range from 25.00pF (max) at 4V reverse bias to 95.00pF (min) at 1V reverse bias.

Feature Summary

• Octave tuning capability across a 0 to 6V voltage range
• Low reverse leakage current ensuring minimal phase noise
• High quality factor (Q) for efficient frequency control
• Tightly regulated capacitance-voltage characteristics

Applications

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

Procurement Notes

Verify the specific package type against the datasheet, as the ZMV934TA designation corresponds to the SOD323 package in the official ordering codes. Confirm that the TA suffix indicates a 7-inch reel quantity of 3,000 units. Ensure compatibility with standard surface mount assembly processes for the specified miniature package dimensions.

Selection Notes

Select this component when low phase noise and precise capacitance tolerance are critical for oscillator stability. The hyperabrupt junction profile supports wide tuning ranges suitable for VCXO and TCXO designs. Verify that the operating environment remains within the specified temperature coefficient limits for capacitance changes.

Part Context

This part belongs to the ZC930, ZMV930, and ZV931 series of silicon 12V hyperabrupt varactor diodes manufactured by Diodes Incorporated (formerly Zetex). The series offers various capacitance grades in SOT23, SOD323, and SOD523 packages to accommodate different circuit density requirements.

Replacement Considerations

Direct substitutes within the same series include ZC934TA and ZMV934ATA. Cross-reference capacitance tolerances and Q factors carefully when considering alternative manufacturers' varactor diodes.