ZC829BTA

Overview

The ZC829BTA is a hyperabrupt junction varactor diode manufactured by Diodes Incorporated. It features a TO-236-3 (SOT-23) surface-mount package and is designed for high-frequency tuning applications. Key electrical parameters include a peak reverse voltage of 25 V, a capacitance ratio of 5.8 measured at C2/C20, and a Q factor of 250 at 3V and 50MHz. The device exhibits a typical capacitance of 8.2pF to 8.61pF at 2V and 1MHz. This component is classified as obsolete in current production lines.

Feature Summary

• Hyperabrupt junction profile optimized for wide tuning range
• High quality factor for efficient frequency control
• Compact SOT-23 surface-mount packaging

Applications

• Voltage-controlled oscillator (VCO) tuning
• Frequency synthesizer circuits
• RF filter tuning networks

Procurement Notes

This component is officially listed as obsolete by the manufacturer. Procurement should focus on verifying stock availability through authorized distributors or secondary market suppliers. Ensure that any sourced units are genuine and match the original datasheet specifications, particularly regarding the TO-236-3 package dimensions and electrical characteristics, before integration into new designs.

Selection Notes

Designers requiring this specific hyperabrupt characteristic must consider alternative varactors with similar capacitance ratios and Q factors. Since the ZC829BTA is obsolete, selection should prioritize components from the same manufacturer's current portfolio that offer comparable performance metrics in a compatible package to ensure supply chain stability and design continuity.

Part Context

The ZC829BTA belongs to the varactor diode category within Diodes Incorporated's discrete semiconductor lineup. Varactors are specialized devices where capacitance varies with applied reverse bias voltage. This specific model was engineered for RF and microwave applications requiring precise frequency adjustment, leveraging its hyperabrupt doping profile to achieve superior tuning linearity compared to standard abrupt junctions.

Replacement Considerations

As the ZC829BTA is obsolete, direct substitutes are not explicitly confirmed in public documentation. Engineers must evaluate other hyperabrupt varactors from Diodes Incorporated or competitors based on matching peak reverse voltage, capacitance ratio, and package type to ensure functional equivalence in existing circuits.