ZMV931TC

Overview

The ZMV931TC is a silicon hyperabrupt varactor diode from the ZC930, ZMV930, and ZV931 series manufactured by Diodes Incorporated. It provides closely controlled capacitance-voltage characteristics for frequency control applications. The device operates with a maximum reverse voltage of 12 V and features low reverse current leakage, typically 200 pA at 8 V, ensuring excellent phase noise performance. Key electrical parameters include a minimum Q factor of 300 at 4 V and 50 MHz, and capacitance values ranging from 7.80 pF to 4.00 pF as reverse voltage increases from 1 V to 4 V.

Feature Summary

• Octave tuning capability across a 0 to 6 V range
• Low reverse current (IR) for minimal phase noise
• High quality factor (Q) for efficient filtering
• Available in miniature surface mount packages

Applications

• VCXO and TCXO circuits
• Wireless communications systems
• Mobile radio equipment
• Pager devices

Procurement Notes

Verify the specific ordering suffix against official documentation before procurement. Suffixes such as TA or TC indicate reel size and quantity per reel, which affects packaging logistics but not the component's electrical function. Confirm RoHS compliance status through the manufacturer's latest environmental statements. Ensure the part number matches the required package type, as variations exist within the series.

Selection Notes

Select the ZMV931TC when high Q and low phase noise are critical for frequency stability. The hyperabrupt junction profile supports octave tuning requirements. Compare capacitance tolerances against circuit specifications to ensure adequate frequency control range. Verify that the operating temperature range aligns with the application environment, as thermal coefficients affect capacitance stability.

Part Context

This component belongs to the ZC930, ZMV930, and ZV931 series of silicon 12V hyperabrupt varactor diodes. The series offers various capacitance ranges and Q factors to suit different filtering needs. The ZMV931 variant specifically targets applications requiring a minimum Q of 300 at 50 MHz. These devices are designed for compact surface mount implementations in RF circuits.

Replacement Considerations

Substitutes within the same series include ZC931TA and ZV931V2TA. These parts share identical electrical characteristics and pinouts but may differ in packaging orientation or marking codes. Verify that any replacement maintains the required Q factor and capacitance tolerance for the specific circuit design.