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NXP Semiconductors BB208-03,115
- Part No.:
- BB208-03,115
- Manufacturer:
- NXP Semiconductors
- Package:
- SC-76, SOD-323
- Datasheet:
-
BB208-03,115.pdf
- Description:
- DIODE VAR CAP 10V SOD-323
- Quantity:
- Payment:
- Shipping:
Inventory:9,215
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Product details
Overview
BB208-03 from NXP Semiconductors is a low-voltage planar variable capacitance diode (varactor) in a SOD323 (SC-76) ultra-small SMD plastic package, designed for tuning applications requiring high CV linearity and low series resistance. It delivers Cd = 21.5 pF at 1 V and 4.9 pF at 7.5 V, with typical rs = 0.35 Ω at 100 MHz and VR(max) = 10 V, enabling precise frequency control in compact RF oscillators.
For engineers reviewing the BB208-03 datasheet, BB208-03 pinout, BB208-03 application, or BB208-03 equivalent, key selection criteria include reverse voltage range (1–7.5 V), capacitance ratio Cd(1V)/Cd(7.5V) ≥ 3.7, junction temperature range (−55 °C to +125 °C), and SOD323 package compatibility with high-density PCB layouts.
Technical Context
The BB208-03 operates as a voltage-controlled capacitor where reverse bias modulates depletion-layer width, directly altering junction capacitance. Its planar silicon structure ensures stable CV characteristics across temperature, with measured TCd < 100 ppm/K over 0–10 V.
Designed for low-noise tuning, it exhibits minimal series resistance (rs ≤ 0.5 Ω) and reverse leakage (IR ≤ 10 nA at 10 V, 25 °C), supporting high-Q resonant circuits in VCOs and VCXOs without degrading phase noise performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cd @ 1 V | 21.5 pF - sets baseline oscillator tank capacitance at low tuning voltage |
| Cd @ 7.5 V | 4.9 pF - defines minimum capacitance for maximum frequency range in VCO design |
| Cd(1V)/Cd(7.5V) | ≥3.7 - enables >1.9:1 frequency tuning ratio in LC-based oscillators |
| rs @ 100 MHz | 0.35 Ω typ - minimizes resistive loss in resonant circuits, preserving Q-factor |
| VR(max) | 10 V - limits maximum reverse bias to prevent avalanche breakdown |
| Tj operating range | −55 °C to +125 °C - supports industrial-grade operation without derating |
| IR @ 10 V, 25 °C | ≤10 nA - ensures negligible DC loading on tuning voltage sources |
Pinout & Package
SOD323 (SC-76) plastic surface-mounted package; 2 leads; cathode marked by bar; footprint dimensions: 1.7 mm × 1.35 mm × 0.95 mm max height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | cathode | Connected to higher-potential node in reverse-biased configuration; marking bar identifies this terminal |
| 2 | anode | Connected to lower-potential node (typically ground or AC ground); forms depletion region with cathode |
Key Features
| Feature | Design Value |
|---|---|
| Excellent CV linearity | Capacitance vs. voltage curve optimized for monotonic, predictable tuning slope in 1–7.5 V range |
| Very low series resistance | 0.35 Ω typical at 100 MHz reduces insertion loss and maintains resonator Q > 100 |
| High capacitance ratio | Cd(1V)/Cd(7.5V) ≥ 3.7 enables wideband frequency coverage without switching banks |
| Ultra-small SMD package | SOD323 footprint (1.7 × 1.35 mm) allows placement adjacent to RF inductors with minimal parasitic coupling |
Applications
| Voltage-Controlled Oscillator (VCO) | Voltage-Controlled Crystal Oscillator (VCXO) |
|---|---|
Use Scenario: Tuning element in monolithic RF VCOs for wireless transceivers operating at 800 MHz–2.4 GHz. IC Role / Device Role / Timing Role: Voltage-variable capacitor forming part of LC tank circuit; capacitance adjusted by analog tuning voltage to shift oscillation frequency. Use Value: 21.5 pF to 4.9 pF range provides >1.9:1 frequency tuning ratio; low rs preserves phase noise below −110 dBc/Hz at 100 kHz offset. | Use Scenario: Fine-frequency adjustment in oven-controlled or temperature-compensated crystal oscillator modules. IC Role / Device Role / Timing Role: Varactor placed across crystal terminals to apply small reactive perturbation, enabling ±50 ppm pullability. Use Value: High CV linearity ensures monotonic frequency response to DAC-generated tuning voltage; low IR avoids drift under long-term bias. |
| RF Filter Tuning | Phase-Locked Loop (PLL) Reference Tuning |
Use Scenario: Adaptive bandpass filter in front-end receivers requiring dynamic channel selection. IC Role / Device Role / Timing Role: Tuning capacitor in switched-capacitor or active-RC filter topologies; reverse voltage adjusts center frequency. Use Value: Cd(1V)/Cd(4V) ≥ 2.0 supports ≥1.4:1 bandwidth reconfiguration; SOD323 size permits integration within 2 mm² filter layout area. | Use Scenario: Frequency calibration element in integer-N PLL synthesizers used in baseband processors. IC Role / Device Role / Timing Role: Capacitance trimmer in reference oscillator loop to compensate for crystal aging and PVT variation. Use Value: Stable Tj range (−55 °C to +125 °C) ensures consistent pullability across environmental stress; 10 nA IR prevents reference voltage droop over 10-year operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar varactor diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMV2023-011LF | Higher Cd(1V) = 27 pF; rs = 0.6 Ω; SOD-323 package; same VR(max) = 10 V | Better low-frequency tuning range but reduced Q at UHF due to higher rs | Select when wider absolute capacitance range is needed over 1–4 V, accepting modest Q penalty |
| BBY52-02W | Lower Cd(1V) = 12 pF; Cd(7.5V) = 2.5 pF; SOD-523 package; VR(max) = 15 V | Smaller capacitance span but higher voltage tolerance; not pin-compatible with SOD323 layout | Choose for higher-reliability 15 V systems where board space allows SOD523 footprint |
Compared with BB208-03, SMV2023-011LF offers greater baseline capacitance but trades off Q-factor, while BBY52-02W provides higher voltage margin at the cost of reduced tuning ratio and incompatible package-making BB208-03 optimal for compact, high-linearity 10 V VCO designs.
Availability
BB208-03 is available at Aetrix Electronics and suitable for voltage-controlled oscillators, VCXO modules, and RF filter tuning applications requiring stable component supply, tight CV matching, and industrial temperature resilience.
Supply support for BB208-03 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and consumer markets.
The BB208-03 belongs to NXP's discrete RF varactor family, engineered specifically for high-linearity, low-loss tuning in miniaturized frequency synthesis and stabilization circuits.
FAQ
What is the maximum reverse voltage rating for BB208-03?
The BB208-03 has a continuous reverse voltage rating (VR) of 10 V, as specified in the Absolute Maximum Ratings table. Exceeding this value risks permanent junction damage. The device is characterized for stable capacitance behavior between 1 V and 7.5 V reverse bias, making 10 V the absolute upper limit for safe operation. BB208-03 must never be forward-biased during normal use.
How does BB208-03 differ from BB208-02 in package and electrical performance?
BB208-03 uses the SOD323 (SC-76) package (1.7 × 1.35 mm), while BB208-02 uses SOD523 (SC-79) (1.25 × 0.85 mm). Both share identical electrical specs: Cd(1V) = 21.5 pF, Cd(7.5V) = 4.9 pF, rs = 0.35 Ω, and VR(max) = 10 V. BB208-03 is not a drop-in replacement for BB208-02 due to different footprints and thermal mass, though functional behavior is equivalent within their respective layouts.
What is the typical series resistance of BB208-03 and why does it matter?
The typical series resistance (rs) of BB208-03 is 0.35 Ω at 100 MHz and VR = 3 V. This low value minimizes energy loss in resonant tank circuits, directly preserving Q-factor and phase noise performance in VCOs and VCXOs. Higher rs would degrade oscillator spectral purity and reduce tuning efficiency-BB208-03's rs ≤ 0.5 Ω ensures robust RF performance up to 2.4 GHz.
Can BB208-03 be used in automotive applications?
No-BB208-03 is not automotive-qualified. The NXP datasheet explicitly states that unless designated as automotive qualified, the product is unsuitable for automotive use and has not undergone AEC-Q200 stress testing. BB208-03 is rated for industrial temperature operation (−55 °C to +125 °C), but lacks automotive-specific reliability validation, traceability, and qualification documentation required for vehicle systems. Use BB208-03 only in industrial, consumer, or communications equipment.
What is the capacitance ratio Cd(1V)/Cd(7.5V) for BB208-03 and how is it applied in design?
BB208-03 has a minimum capacitance ratio Cd(1V)/Cd(7.5V) of 3.7, with typical values reaching 5.2. This ratio determines the theoretical frequency tuning range in LC oscillators (f ∝ 1/√C), yielding >1.9:1 frequency coverage. Designers use this spec to calculate achievable VCO bandwidth without switching capacitors; BB208-03's ratio supports single-band tunability from 800 MHz to 1.6 GHz in standard microstrip tank designs.
BB208-03,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Capacitance @ Vr, F:
- 5.4pF @ 7.5V, 1MHz
- Capacitance Ratio:
- 5.2
- Capacitance Ratio Condition:
- C1/C7.5
- Voltage - Peak Reverse (Max):
- 10 V
- Diode Type:
- Single
- Q @ Vr, F:
- -
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BB208-03,115 FAQ
1.How can I place an order for BB208-03,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BB208-03,115 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for BB208-03,115 reliable?
The price and inventory of BB208-03,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BB208-03,115 is usually 5 days.
3.What payment methods are accepted for BB208-03,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BB208-03,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BB208-03,115?
BB208-03,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BB208-03,115 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for BB208-03,115?
For technical support, including BB208-03,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BB208-03,115 requirements.
6.How does Aetrix verify that BB208-03,115 is sourced from the original manufacturer or authorized distributors?
All BB208-03,115 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BB208-03,115 meets industry standards.
7.What is the process for return or replacement of BB208-03,115?
All BB208-03,115 units undergo pre-shipment inspection (PSI). If there is an issue with BB208-03,115, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The BB208-03,115 part is unused and in its original packaging.
Return procedure for BB208-03,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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