ZMV833ATC

Overview

The ZMV833ATC is a silicon hyperabrupt varactor diode from the 830 series, manufactured by Zetex Semiconductors. It features closely controlled capacitance-voltage characteristics and high Q factors for frequency control applications. The nominal capacitance is 33.0 pF with a tolerance range of 31.35 to 34.65 pF at 2V reverse bias. The device exhibits a minimum Q of 200 at 3V and 50MHz, with a capacitance ratio (C2/C20) between 5.0 and 6.5. It operates within a temperature range of -55°C to +150°C and utilizes an SOD-523 surface-mount package.

Feature Summary

• Hyperabrupt junction design providing high tuning ratios for efficient frequency modulation
• Low reverse leakage current typically around 200pA to ensure excellent phase noise performance
• High quality factor (Q) maintained across operating frequencies for stable circuit operation
• Miniature surface mount packaging options available for space-constrained designs

Applications

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

Procurement Notes

Verify the specific ordering suffix to confirm reel size and quantity. The 'TC' suffix indicates a 13-inch tape and reel containing 10,000 units, whereas 'TA' denotes a 7-inch reel with 3,000 units. Ensure compatibility with automated pick-and-place equipment specifications for the selected packaging format before finalizing procurement orders.

Selection Notes

Select this component when a nominal capacitance near 33pF is required for hyperabrupt tuning applications. Compare against the 830 series table to verify if the A or B grading option meets the specific capacitance tolerance requirements. Consider the SOD-523 package dimensions for PCB layout constraints and ensure the operating voltage remains within the specified limits to maintain the desired Q factor and capacitance ratio.

Part Context

This part belongs to the Zetex 830 series of silicon hyperabrupt varactor diodes. The series includes variants such as ZMV829 through ZMV836, offering different nominal capacitance values ranging from approximately 8pF to 100pF. These devices are designed for use in frequency control circuits where precise capacitance tuning and low noise are critical performance parameters.

Replacement Considerations

Direct substitutes within the same family include ZMV833ATA (7-inch reel) or other 830 series variants like ZMV832ATC if lower capacitance is acceptable. Verify that any replacement maintains the required hyperabrupt characteristic and package type to ensure electrical and mechanical compatibility.