ZMV831BTA

Variable Capacitance (Varicaps, Varactors) Overview

The ZMV831BTA 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 for frequency control applications. The device operates in a single common cathode format within an SOD523 surface-mount package. Key electrical parameters include a nominal capacitance of 15.0 pF at 2V reverse bias and 1MHz frequency, with a minimum Q of 300 at 3V and 50MHz. The capacitance ratio (C2/C20) is specified between 4.5 and 6.0. It supports an operating temperature range of -55°C to +150°C.

Variable Capacitance (Varicaps, Varactors) Feature Summary

• Hyperabrupt junction design providing high tuning ratios
• Low reverse leakage current ensuring excellent phase noise performance
• High quality factor (Q) suitable for precision filtering
• Miniature SOD523 surface mount package

Variable Capacitance (Varicaps, Varactors) Applications

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

Variable Capacitance (Varicaps, Varactors) Procurement Notes

Verify component authenticity through authorized channels as counterfeit semiconductor devices exist. Confirm the specific ordering suffix matches the required reel size; TA indicates 7-inch reels while TC denotes 13-inch reels. Check the latest manufacturer documentation for any product change notices or obsolescence status updates prior to finalizing procurement orders.

Variable Capacitance (Varicaps, Varactors) Selection Notes

Select this component when steep capacitance-voltage slopes are required for wide tuning ranges. Ensure the application voltage does not exceed the maximum reverse breakdown rating. Verify that the SOD523 package dimensions fit the available PCB real estate. Consider thermal dissipation limits if operating near the upper temperature extremes.

Variable Capacitance (Varicaps, Varactors) Part Context

This part belongs to the 830 series of silicon hyperabrupt varactor diodes originally developed by Zetex Semiconductors plc. The series includes various models like ZC829, ZDC833, and ZMDC830, offering different capacitance values and package options such as SOT23, SOT323, and SOD323. Diodes Incorporated acquired the Zetex brand and continues to support these legacy components.

Variable Capacitance (Varicaps, Varactors) Replacement Considerations

For steeper CV slopes, consider the 12V hyperabrupt range including ZC930, ZMV930, ZV930, and ZV931. Direct pin-compatible replacements may be found within the same 830 series family, such as ZMV831ATA, provided the packaging and marking requirements align with the design constraints.