ZMV829BTA

Overview

The ZMV829BTA is a silicon hyperabrupt varactor diode from the 830 series, designed for frequency control and filtering applications. It features closely controlled capacitance-voltage (CV) characteristics and high Q factors. The nominal capacitance at 2V reverse bias is 8.2 pF, with a range of 7.79 to 8.61 pF. At 3V reverse bias and 50MHz, the minimum Q is 250. The device exhibits a capacitance ratio (C2/C20) between 4.3 and 5.8 at 1MHz. Reverse leakage current is typically 200pA, ensuring low phase noise performance.

Feature Summary

• High tuning ratio enabled by steep CV slope
• Low reverse leakage current for superior phase noise
• High quality factor (Q) across operating frequencies
• Miniature surface mount package options

Applications

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

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation before purchase. The 'TA' suffix indicates 7-inch reels containing 3,000 units, while 'TC' denotes 13-inch reels with 10,000 units. Confirm that the component source is an authorized distributor to ensure product authenticity and compliance with quality standards.

Selection Notes

Select this component when a nominal capacitance near 8.2 pF is required for hyperabrupt tuning applications. Compare the C2/C20 ratio against circuit requirements to ensure adequate tuning linearity. Verify that the SOT23 or SOD323 package dimensions fit the available PCB real estate constraints.

Part Context

This part belongs to the 830 series of silicon hyperabrupt varactor diodes originally manufactured by Zetex Semiconductors plc. The series includes variants such as ZC829, ZDC833, and ZV831, offering different capacitance values and package formats like SOT23, SOD323, and SOD523.

Replacement Considerations

Direct substitutes within the same family include ZMV829ATA, which shares identical electrical specifications but utilizes a 7-inch reel format instead of the standard tape configuration.