ZDC834ATA

Overview

The ZDC834ATA is a dual common cathode varactor diode manufactured by Diodes Incorporated, housed in an SOT-23-3 surface-mount package. It features a peak reverse voltage of 25 V and a capacitance of 51.7 pF at 2 V and 1 MHz. The component offers a capacitance ratio of 6.5 (C2/C20) and maintains a Q value of 200 at 3 V and 50 MHz. It operates within a junction temperature range of -55°C to 150°C.

Feature Summary

• Dual common cathode configuration for compact circuit integration
• High Q factor ensuring efficient frequency control performance
• Tightly controlled CV characteristics for stable filtering applications

Applications

• Frequency control circuits
• Filtering applications
• Voltage-controlled oscillator tuning

Procurement Notes

Verify the obsolete status of this component before finalizing designs, as it was discontinued on April 27, 2024. Ensure that any replacement strategy accounts for long-term supply chain stability. Confirm that the SOT-23-3 footprint matches the target PCB layout requirements. Check RoHS3 compliance documentation if environmental regulations apply to the end product.

Selection Notes

Select this part when a dual varactor solution with common cathode topology is required for space-constrained designs. The high Q value makes it suitable for applications demanding low loss in frequency tuning networks. Consider the 25 V reverse voltage rating to ensure adequate margin against transient voltages in the specific circuit environment.

Part Context

This component belongs to the silicon varactor diode family designed for precision frequency control. It utilizes closely controlled capacitance-voltage characteristics to provide reliable performance in oscillators and filters. The series is known for maintaining high quality factors while minimizing reverse current leakage.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Due to the obsolete status, engineers must identify equivalent components based on matching electrical parameters such as capacitance ratio, Q value, and package type.