ZMV835ATC

Overview

The ZMV835ATC 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 to ensure excellent phase noise performance. The device operates with low reverse current, typically 200pA, and provides a nominal capacitance of 68.0 pF at 2V reverse bias. It supports a maximum operating temperature of +150°C and is available in miniature surface-mount packages such as SOT-23.

Feature Summary

• Hyperabrupt junction design for high tuning ratios
• Low reverse leakage current for minimal phase noise
• High Q factor for stable frequency control
• Tight capacitance tolerance for precise filtering

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and reel configuration. The 'TC' suffix indicates a 13-inch tape and reel format containing 10,000 units, while 'TA' denotes a 7-inch reel with 3,000 units. Ensure compatibility with automated assembly processes by confirming the correct reel size and tape width specifications prior to procurement.

Selection Notes

Select this component when designing circuits requiring steep capacitance-voltage slopes for wide tuning ranges. The 835 variant offers a higher nominal capacitance compared to lower-numbered series members, making it suitable for specific resonant frequency requirements. Consider the thermal stability and low leakage characteristics when optimizing for low-phase-noise performance in sensitive oscillator designs.

Part Context

This part belongs to the Zetex 830 series of silicon hyperabrupt varactor diodes, which also includes variants like ZMV829 through ZMV836. These devices are engineered for general-purpose frequency control where consistent CV characteristics are critical. The series is manufactured by Zetex Semiconductors, now part of Diodes Incorporated, providing standardized solutions for RF and microwave tuning applications.

Replacement Considerations

Direct replacements within the same family include ZMV835BTA or ZMV835ATA, which share identical electrical characteristics but may differ in packaging or reel specifications. Cross-series substitution requires careful evaluation of capacitance values and tuning ratios to ensure circuit performance remains within acceptable limits.