ZMV834ATA

Overview

The ZMV834ATA is a silicon hyperabrupt varactor diode from the 830 series, designed for frequency control and filtering applications. It features closely controlled capacitance-voltage characteristics and high Q factors to ensure excellent phase noise performance. The device operates with a nominal capacitance of 47 pF at 2V reverse bias and 1MHz frequency, offering a minimum capacitance ratio of 5.0 between 2V and 20V. It supports a maximum forward current of 200 mA and withstands a reverse voltage leakage of typically 20 nA at 20V. The component is housed in an SOD-323 surface mount package.

Feature Summary

• Hyperabrupt junction design providing steep capacitance-voltage slopes for efficient tuning
• Low reverse current leakage ensuring minimal impact on phase noise performance
• High quality factor (Q) maintained across operating frequencies
• Miniature surface mount packaging suitable for space-constrained designs

Applications

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

Procurement Notes

Verify the specific manufacturer origin as the part was originally produced by Zetex Semiconductors before acquisition by Diodes Incorporated. Confirm RoHS compliance status and check for any product change notices regarding the transition from Zetex to Diodes Incorporated specifications. Ensure the ordering suffix TA corresponds to 7-inch reels if reel quantity is required.

Selection Notes

Select this component when a high capacitance ratio and low phase noise are critical requirements for oscillator circuits. Compare the 47 pF nominal capacitance against circuit tuning range needs. Consider the SOD-323 package dimensions for PCB layout constraints. Evaluate thermal dissipation limits relative to the expected power dissipation in the application environment.

Part Context

This component belongs to the 830 series of silicon hyperabrupt varactor diodes originally published by Zetex Semiconductors. The series includes various capacitance values ranging from approximately 7 pF to 100 pF. The ZMV834ATA specifically represents the higher capacitance end of the single-diode lineup within this family.

Replacement Considerations

Direct substitutes include other parts from the same 830 series such as ZMV833ATA or ZMV835ATA depending on required capacitance adjustments. Cross-reference with similar hyperabrupt varactors from manufacturers like Skyworks Solutions Inc., such as the SMV2026, ensuring pinout and electrical parameters match.