ZC933ATA

Overview

The ZC933ATA is a silicon hyperabrupt varactor diode manufactured by Diodes Incorporated, designed for frequency control and filtering applications. It features closely controlled capacitance-voltage characteristics and high Q factors. The device operates with a maximum reverse voltage of 12 V and supports octave tuning from 0 to 6 V. At a reverse voltage of 4 V, the capacitance ranges between 12.00 pF and 24.75 pF, with a minimum Q factor of 150 at 50 MHz. It utilizes low reverse current leakage, typically 200 pA, to ensure excellent phase noise performance.

Feature Summary

• Octave tuning capability across a 0 to 6 V range
• Low reverse current leakage ensuring very low phase noise
• High Q factor for efficient frequency control
• Tight tolerance on 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 ordering suffix TA or TC against the manufacturer's documentation to confirm reel size and quantity per reel. Confirm RoHS compliance status through official datasheets or certificates before procurement. Ensure the component matches the required surface mount package dimensions for the target PCB layout.

Selection Notes

Select this component when tight capacitance tolerance and high Q are critical for oscillator stability. Verify that the 12 V reverse voltage rating meets the circuit requirements. Consider the SOD-323 package availability if space constraints exist within the design.

Part Context

This part belongs to the ZC930, ZMV930, and ZV931 series of silicon hyperabrupt varactor diodes. These devices are engineered for miniature surface mount packages, offering consistent electrical performance across single configurations. The series provides reliable options for RF tuning circuits requiring precise capacitance control.

Replacement Considerations

Check the ZC933TA variant for identical electrical specifications but different packaging or reel quantities. Review other members of the ZC930 series for alternative capacitance values if system tuning ranges differ.