ZC932TA

Overview

The ZC932TA 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 a maximum reverse voltage of 12 V and offers low reverse current leakage, typically 200 pA, ensuring excellent phase noise performance. Electrical specifications at 25°C include a capacitance range of 5.50 pF to 17.00 pF depending on the applied reverse bias voltage (4V to 1V), with a minimum Q of 200 at 4V and 50MHz. It is available in miniature surface mount packages including SOT-23, SOD-323, and SOD-523.

Feature Summary

• Octave tuning capability from 0 to 6V
• Low reverse current ensures very low phase noise performance
• High Q factor for efficient frequency control
• Available in single or dual common cathode formats

Applications

• VCXO and TCXO circuits
• Wireless communications systems
• Mobile radio equipment
• Pager devices

Procurement Notes

Verify the specific package variant required, as the ZC932TA part number encompasses multiple package options such as SOT-23, SOD-323, and SOD-523. Confirm the ordering suffix matches the desired reel size and tape width specifications provided in the datasheet. Ensure compatibility with the intended operating temperature range and power dissipation limits for the selected package type before finalizing procurement.

Selection Notes

Select the ZC932TA based on the required capacitance tolerance and Q factor for the target frequency application. Consider the power dissipation limits which vary by package: 330 mW for SOT-23 and SOD-323, and 250 mW for SOD-523. Evaluate the temperature coefficient of capacitance if operation outside standard ambient conditions is anticipated. Ensure the reverse voltage rating of 12 V aligns with the circuit's maximum operating voltage.

Part Context

The ZC932TA belongs to the ZC930 series of silicon hyperabrupt varactor diodes originally developed by Zetex Semiconductors plc and now distributed by Diodes Incorporated. This series provides a range of capacitance values optimized for frequency control applications. The component is part of a broader family that includes variants like ZC930, ZC931, and ZC933, each offering different capacitance ranges while maintaining similar electrical characteristics and packaging options.

Replacement Considerations

Direct substitutes within the same series include ZC931TA and ZC933TA, though these offer different capacitance values. Cross-brand replacements should match the 12V reverse voltage rating, similar C-V characteristics, and compatible package dimensions. Verify that any alternative component meets the required Q factor and phase noise specifications for the specific application.