ZC833BTA

Overview

The ZC833BTA is a silicon hyperabrupt varactor diode from the 830 series, manufactured by Diodes Incorporated (formerly Zetex). It features closely controlled capacitance-voltage characteristics and high Q factors for frequency control applications. The device operates within a temperature range of -55°C to +150°C. Key electrical parameters include a nominal capacitance of 33.0 pF at 2V reverse bias and 1MHz frequency, with a minimum Q of 200 at 3V and 50MHz. The capacitance ratio (C2/C20) ranges from 5.0 to 6.5. It utilizes an SOT-23 surface mount package.

Feature Summary

• Hyperabrupt junction design providing steep capacitance-voltage slopes for wide tuning ratios
• Low reverse leakage current typically around 200pA to ensure excellent phase noise performance
• High quality factor (Q) ensuring efficient operation in resonant circuits
• Tight tolerance on capacitance values for precise frequency control

Applications

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

Procurement Notes

Verify component authenticity through authorized channels as Zetex Semiconductors advises against unauthorized sales. Confirm package type matches the specific order code suffix requirements. Check datasheet revisions for any updates to mechanical dimensions or electrical limits before finalizing procurement specifications.

Selection Notes

Select the ZC833BTA when a nominal capacitance near 33pF is required for hyperabrupt tuning applications. Ensure the operating environment stays within the specified -55°C to +150°C range. Compare the C2/C20 ratio requirements against other 830 series variants if different tuning sensitivities are needed for the specific circuit topology.

Part Context

This component belongs to the 830 series of silicon hyperabrupt varactor diodes originally produced by Zetex Semiconductors plc. The series includes various part numbers differentiated by capacitance values and package types. The ZC833BTA specifically denotes the B-tolerance variant in the SOT-23 package format.

Replacement Considerations

Direct substitutes within the same family include ZC833ATA for A-tolerance specifications. Other series members like ZC832BTA or ZC834BTA offer different capacitance values but share similar electrical characteristics and packaging.