ZC832BTA

Overview

The ZC832BTA is a silicon hyperabrupt varactor diode from the 830 series, designed for frequency control and filtering applications. It features closely controlled capacitance-voltage (CV) characteristics and high Q factors. At a reverse voltage of 2V and frequency of 1MHz, the nominal capacitance is 22.0 pF with a range of 20.9 to 23.1 pF. The minimum Q factor at 3V and 50MHz is 200. The device exhibits a capacitance ratio (C2/C20) between 5.0 and 6.5 at 1MHz. It operates within a temperature range of -55°C to +150°C and has a maximum reverse leakage current of 20 nA at 20V.

Feature Summary

• Hyperabrupt CV characteristics provide high tuning ratios suitable for precise frequency control.
• Low reverse leakage current ensures excellent phase noise performance in oscillator circuits.
• High Q factor maintains signal integrity in filtering and resonance applications.

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 required reel size. The TA suffix indicates 7-inch reels containing 3,000 units, while TC denotes 13-inch reels with 10,000 units. Confirm package availability matches the design requirements, as this series supports SOT23, SOD323, SOD523, and SOT323 formats. Ensure compliance with RoHS directives if environmental standards are mandated for the final assembly.

Selection Notes

Select the ZC832BTA when a nominal capacitance near 22 pF is required for hyperabrupt tuning applications. Compare the C2/C20 ratio against other series members if steeper tuning slopes are needed, noting that the 12V hyperabrupt range offers different characteristics. Verify that the operating voltage and frequency constraints align with the specified Q factor and leakage current limits for the target circuit topology.

Part Context

This component belongs to the Zetex 830 series of silicon hyperabrupt varactor diodes. The series includes variants such as ZC829 through ZC836, offering a range of capacitance values from approximately 8 pF to 100 pF. The BTA suffix specifically identifies the tolerance band and packaging configuration for this particular part number within the broader product family.

Replacement Considerations

Direct substitutes within the same series include ZC832ATA for different reel packaging. For alternative capacitance values, consider ZC831BTA (15 pF) or ZC833BTA (33 pF). If steeper CV slopes are required, the 12V hyperabrupt range devices like ZC930 may be evaluated, though electrical parameters will differ significantly.

FAQ

What is the typical reverse leakage current for the ZC832BTA?

The maximum reverse leakage current is specified as 20 nA at a reverse voltage of 20V.

How does the capacitance vary with applied voltage?

The device uses a hyperabrupt junction profile, providing a capacitance ratio (C2/C20) between 5.0 and 6.5 at 1MHz, allowing for significant tuning range over the voltage swing.

What packages are available for this component?

The 830 series, including the ZC832BTA, is available in miniature surface mount packages such as SOT23, SOT323, SOD523, and SOD323.