ZMV835BTC

Overview

The ZMV835BTC is a silicon hyperabrupt varactor diode from the 830 series, designed for frequency control and filtering applications. It features closely controlled capacitance-voltage characteristics and high Q factors. The device operates in a single common cathode format within an SOT-23 surface mount package. Key electrical parameters include a nominal capacitance of 68 pF at 2V reverse bias (1MHz), a minimum Q of 100 at 3V (50MHz), and a capacitance ratio (C2/C20) ranging from 5.0 to 6.5. It supports a maximum power dissipation of 330 mW and functions across a temperature range of -55°C to +150°C.

Feature Summary

• Hyperabrupt junction design providing steep capacitance-voltage slopes for wide tuning ratios
• Low reverse leakage current ensuring minimal phase noise performance
• High quality factor (Q) optimized for precision frequency control circuits

Applications

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

Procurement Notes

Verify component authenticity through authorized distribution channels or direct manufacturer purchase. Confirm RoHS compliance status and check for specific environmental declarations such as REACH registration. Ensure handling precautions are observed due to electrostatic discharge sensitivity inherent to semiconductor devices.

Selection Notes

Select this component when a high capacitance ratio and low phase noise are required for hyperabrupt tuning applications. Compare against the 12V hyperabrupt range if steeper CV slopes are needed. Verify that the SOT-23 package dimensions fit the target PCB layout constraints and that the operating voltage range aligns with circuit requirements.

Part Context

This part belongs to the Zetex 830 series of silicon hyperabrupt varactor diodes, originally manufactured by Zetex Semiconductors plc before its acquisition by Diodes Incorporated. The series includes various capacitance values and package options like SOD-323 and SOD-523, catering to diverse miniature surface mount design needs.

Replacement Considerations

Check for equivalent parts within the same 830 series family, such as ZMV834BTA or ZMV836BTA, which offer different nominal capacitances but similar electrical profiles. Verify pinout compatibility and package dimensions before substitution.