ZMV833BTA

Overview

The ZMV833BTA 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. The device operates with low reverse current to ensure minimal phase noise. Electrical specifications at 25°C include a nominal capacitance of 33 pF (range 31.35–34.65 pF) at 2V reverse bias, a minimum Q of 200 at 50MHz/3V, and a capacitance ratio of 5.0–6.5 between 2V and 20V. Absolute maximum ratings specify a forward current of 200 mA, power dissipation of 330 mW in SOT-23/SOD-323 packages, and an operating temperature range of -55°C to +150°C.

Feature Summary

• Hyperabrupt junction design providing high tuning ratios and steep CV slopes
• Low reverse leakage current typically around 200pA for superior phase noise performance
• High quality factor (Q) maintained across operating frequencies
• Available in miniature surface-mount packages including SOT-23, SOT-323, SOD-523, and SOD-323

Applications

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

Procurement Notes

Verify component authenticity by sourcing exclusively from Zetex Semiconductors or authorized regional distributors. Unauthorized channels lack warranty coverage. Confirm package type and reel specifications match project requirements prior to ordering. Ensure handling procedures account for electrostatic discharge sensitivity inherent to semiconductor devices.

Selection Notes

Select the ZMV833BTA when a nominal capacitance near 33 pF is required for hyperabrupt tuning applications. Compare against the 830 series table to ensure the specific capacitance tolerance and Q factor meet circuit constraints. Verify that the chosen package variant aligns with PCB footprint limitations and thermal dissipation capabilities defined in the absolute maximum ratings.

Part Context

This component belongs to the Zetex 830 series of silicon hyperabrupt varactor diodes. The series includes variants such as ZC833, ZDC833, and ZV831, offering different capacitance values and packaging options. The ZMV833BTA specifically denotes the dual common cathode configuration in a specified surface-mount package, distinct from single units like the ZC833BTA.

Replacement Considerations

Direct substitutes within the same family include ZC833BTA (single unit) or ZDC833ATA (dual common cathode). Cross-series replacements require matching hyperabrupt characteristics and capacitance ranges. Verify pinout compatibility and package dimensions before substituting.