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Product Detailed Parameters
- Description：DIODE UHF VAR CAP 30V SOD323
- Series：-
- Mfr：NXP USA Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Capacitance @ Vr, F：2.225pF @ 28V, 1MHz
- Capacitance Ratio：10.9
- Capacitance Ratio Condition：C1/C28
- Voltage - Peak Reverse (Max)：30 V
- Diode Type：Single
- Q @ Vr, F：-
- Operating Temperature：-55°C ~ 125°C (TJ)
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- Package / Case：SC-76, SOD-323
- Supplier Device Package：SOD-323
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Overview
The BB149A,115 is a UHF variable capacitance diode manufactured by NXP Semiconductors. It is fabricated using planar technology and encapsulated in the SOD323 very small plastic surface-mount device (SMD) package. The component achieves excellent matching performance through gliding matching and direct assembly procedures. Key electrical specifications include a capacitance at 28V (C28) of 2.1 pF with a ratio of 9. It features low series resistance and supports electronic tuning applications.
Feature Summary
- Excellent linearity for signal integrity
- High precision matching to 1% DMA
- Compact SOD323 SMD footprint
Applications
- Electronic tuning in UHF television tuners
- Voltage-controlled oscillators (VCO)
Procurement Notes
Verify the specific suffix 115 against official documentation to confirm reel quantity or tape-and-reel specifications. Ensure compatibility with SOD323 mounting requirements. Confirm that the C28 value of 2.1 pF meets circuit design tolerances. Check for any obsolescence notices regarding this specific variant.
Selection Notes
Select the BB149A,115 when compact size and high matching precision are required for UHF frequency ranges. Consider the unmatched BB159 if tighter tolerance is not necessary. Evaluate the low series resistance benefit for high-frequency efficiency. Ensure the SOD323 package fits the available PCB space constraints.
Part Context
The BB149A belongs to NXP's portfolio of UHF variable capacitance diodes designed for RF tuning applications. It shares functional similarities with the BB149 but may offer improved characteristics. The component is part of a family including the BB159, which provides similar performance without tight matching. These diodes support legacy and modern UHF tuner designs.
Replacement Considerations
The BB159 serves as an unmatched alternative with identical specifications except for the 1% DMA matching requirement. Other compatible variants within the UHF diode family should be evaluated based on package availability and specific capacitance ratios.
