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NXP Semiconductors BA891,115
- Part No.:
- BA891,115
- Manufacturer:
- NXP Semiconductors
- Category:
- RF Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BA891,115.pdf
- Description:
- DIODE STANDARD 35V 715MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:7,838
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Product details
Overview
BA891,115 from NXP Semiconductors is a planar high-performance band-switching diode in SOD523 ultra-small SMD package, featuring max. 1.05 pF capacitance at VR = 1 V, max. 0.7 Ω forward resistance at IF = 3 mA / 100 MHz, and 35 V continuous reverse voltage. It serves as a low-loss RF switching element in VHF television tuner front-ends.
For engineers reviewing the BA891,115 datasheet, BA891,115 pinout, BA891,115 application, or BA891,115 equivalent, key selection criteria include diode capacitance vs. reverse voltage (0.65–1.05 pF), RF forward resistance (0.28–0.7 Ω), thermal resistance (85 K/W), and SOD523 mechanical compatibility for space-constrained tuner modules.
Technical Context
The BA891,115 operates as a voltage-controlled RF switch in VHF band-select circuits, leveraging its low series inductance (0.6 nH) and minimal junction capacitance to maintain signal integrity above 30 MHz. Its planar construction ensures stable rD and Cd across temperature and bias conditions.
Designed for DC blocking and AC path switching in tuner input stages, it supports bidirectional RF conduction with cathode-anode polarity defined per JEDEC SC-79 outline. Reverse leakage remains ≤20 nA at 30 V, enabling low-noise switching in high-impedance signal paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Diode capacitance | 0.65–1.05 pF (VR = 1–3 V, f = 1 MHz); enables <1 dB insertion loss in 75 Ω VHF tuner switches |
| Forward resistance | 0.28–0.7 Ω (IF = 3–10 mA, f = 100 MHz); ensures <0.1 dB RF conduction loss at 100 MHz |
| Reverse voltage | 35 V max continuous; supports tuner AGC and tuning voltage margins up to ±15 V |
| Forward voltage | ≤1 V at IF = 10 mA; minimizes DC power dissipation in bias networks |
| Series inductance | 0.6 nH typical; preserves impedance matching up to 500 MHz |
| Thermal resistance | 85 K/W (junction-to-soldering point); allows 715 mW dissipation at Ts = 90 °C |
Pinout & Package
Package: SOD523 (JEDEC SC-79), ultra-small plastic surface-mount package (1.25 × 0.85 × 0.65 mm), cathode marked by band on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | DC bias return and RF reference node; connected to ground or tuned circuit common |
| 2 | Anode | RF signal input/output terminal; polarity determines forward conduction direction in switching path |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low capacitance | 0.65 pF min at VR = 3 V enables clean VHF band separation without harmonic distortion |
| Low RF forward resistance | 0.28 Ω typ. at IF = 10 mA reduces insertion loss in 75 Ω antenna switching paths |
| SOD523 footprint | 1.25 × 0.85 mm outline supports high-density tuner PCB layouts with <0.3 mm pad pitch |
| Stable thermal performance | 85 K/W Rth j-s allows sustained operation under 100 mA pulsed RF current in compact tuners |
Applications
| VHF Television Tuner Front-End | FM Radio Band Switching |
|---|---|
Use Scenario: Selecting between VHF-L and VHF-H bands in analog/digital TV tuners using DC-biased RF switching. IC Role / Device Role / Timing Role: Band-switching diode providing low-loss RF path isolation and conduction. Use Value: 0.65 pF capacitance at 3 V reverse bias ensures >40 dB inter-band isolation at 174–230 MHz. | Use Scenario: Switching antenna input between AM/FM bands in portable radios with shared LNA stages. IC Role / Device Role / Timing Role: RF shunt switch controlling signal routing via anode-cathode bias control. Use Value: 0.7 Ω max forward resistance maintains FM signal SNR above 60 dB in 50 Ω paths. |
| CATV Signal Path Selection | Wireless Microphone Receiver Tuning |
Use Scenario: Isolating downstream/upstream signal paths in bi-directional CATV set-top box tuners. IC Role / Device Role / Timing Role: Voltage-controlled RF switch enabling full-duplex path separation. Use Value: ≤20 nA reverse leakage prevents DC coupling errors in high-impedance filter networks. | Use Scenario: Selecting between UHF and VHF receiver bands in professional wireless microphone systems. IC Role / Device Role / Timing Role: Low-inductance (0.6 nH) band-switching diode minimizing phase shift in 174–862 MHz paths. Use Value: 35 V VR rating accommodates tuner varactor control voltages up to ±12 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar band-switching diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BAS16,115 | Higher Cd (1.5 pF typ.), higher rD (1.2 Ω), SOD323 package (larger) | Less suitable for VHF >150 MHz due to higher capacitance-induced loss | Use where board space permits larger footprint and bandwidth ≤100 MHz |
| BAV99,215 | Dual-diode configuration, 2.0 pF Cd, 1.5 Ω rD, SOT-23 package | Not single-diode drop-in; requires layout change and bias network redesign | Select only when dual-switch topology is required and space allows SOT-23 |
Compared with BAS16,115 and BAV99,215, the BA891,115 delivers superior VHF band-switching performance via lower capacitance and resistance in the smallest SOD523 footprint-critical for modern tuner miniaturization without sacrificing RF isolation or insertion loss.
Availability
BA891,115 is available at Aetrix Electronics and suitable for VHF television tuners, FM radio front-ends, and CATV signal path selection requiring stable component supply and long-term obsolescence management.
Supply support for BA891,115 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 electronics.
The BA891,115 belongs to NXP's RF discrete diode product line, engineered specifically for low-loss, high-isolation band-switching in analog and digital broadcast receiver front-ends.
FAQ
What is the maximum reverse voltage rating for BA891,115?
The BA891,115 has a continuous reverse voltage rating of 35 V, as specified in the Absolute Maximum Ratings table. This rating applies under steady-state DC conditions and ensures reliable operation in tuner AGC and band-selection bias networks where reverse voltages up to ±15 V are typical. Exceeding 35 V may cause permanent junction damage per IEC 60134 limiting value guidelines.
How does BA891,115 diode capacitance vary with reverse voltage?
BA891,115 diode capacitance decreases with increasing reverse voltage: 0.8–1.05 pF at VR = 1 V and 0.65–0.9 pF at VR = 3 V (f = 1 MHz, Tj = 25 °C). This voltage-dependent capacitance enables precise tuning of resonant circuits in VHF band-switching applications, and the data is verified in Figure 2 of the official NXP datasheet Rev. 04.
Is BA891,115 compatible with lead-free reflow soldering processes?
Yes, BA891,115 is qualified for lead-free reflow soldering per J-STD-020. Its SOD523 plastic package withstands peak temperatures up to 260 °C for 10 seconds. The device meets RoHS Directive 2011/65/EU and is marked with the "Pb-free" designation in NXP's compliance documentation, confirming suitability for standard Pb-free assembly lines.
What is the thermal resistance from junction to soldering point for BA891,115?
The BA891,115 has a thermal resistance of 85 K/W from junction to soldering point (Rth j-s), measured under standard test conditions. This value enables calculation of junction temperature rise during RF switching operation and supports thermal design in compact tuner modules where heatsinking is limited. It is specified in the Thermal Characteristics section of the NXP datasheet.
Can BA891,115 be used in 50 Ω RF applications?
Yes, BA891,115 is routinely deployed in 50 Ω RF applications such as FM radio band switching and wireless microphone receivers. Its 0.28–0.7 Ω forward resistance and 0.65–1.05 pF capacitance yield insertion loss <0.1 dB and isolation >40 dB in 50 Ω systems at frequencies up to 230 MHz, as confirmed by NXP's typical performance curves (Fig.2 and Fig.3).
BA891,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Diode Type:
- Standard - Single
- Voltage - Peak Reverse (Max):
- 35V
- Current - Max:
- 100 mA
- Capacitance @ Vr, F:
- 0.9pF @ 3V, 1MHz
- Resistance @ If, F:
- 500mOhm @ 10mA, 100MHz
- Power Dissipation (Max):
- 715 mW
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- SOD-523
BA891,115 FAQ
1.How can I place an order for BA891,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BA891,115 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 BA891,115 reliable?
The price and inventory of BA891,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BA891,115 is usually 5 days.
3.What payment methods are accepted for BA891,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BA891,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BA891,115?
BA891,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BA891,115 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 BA891,115?
For technical support, including BA891,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BA891,115 requirements.
6.How does Aetrix verify that BA891,115 is sourced from the original manufacturer or authorized distributors?
All BA891,115 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 BA891,115 meets industry standards.
7.What is the process for return or replacement of BA891,115?
All BA891,115 units undergo pre-shipment inspection (PSI). If there is an issue with BA891,115, 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 BA891,115 part is unused and in its original packaging.
Return procedure for BA891,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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