My Inquiry
My Account
Infineon Technologies BB 689 E7903
- Part No.:
- BB 689 E7903
- Manufacturer:
- Infineon Technologies
- Package:
- SC-80
- Datasheet:
-
BB 689 E7903.pdf
- Description:
- DIODE TUNING 30V 20MA SCD-80
- Quantity:
- Payment:
- Shipping:
Inventory:3,324
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BB689 E7903 from Infineon Technologies is a silicon tuning diode (varactor) designed for VHF TV tuner front-end LC resonant circuits, featuring a capacitance range of 2.5–61.5 pF at 1 MHz, capacitance ratio CT1/CT28 = 20.9, and low series resistance of 0.85 Ω typical at 470 MHz - enabling precise frequency tuning in analog broadcast receivers.
For engineers reviewing the BB689 E7903 datasheet, BB689 E7903 pinout, BB689 E7903 application, or BB689 E7903 equivalent, key selection criteria include reverse voltage rating (30 V), temperature coefficient of capacitance, matching tolerance (±2 % across 7-diode sequence), and SC79 package compatibility with high-density RF layouts.
Technical Context
This varactor operates under reverse-bias only, where junction capacitance varies nonlinearly with applied DC tuning voltage (VR = 1–28 V). Its "in-line" matching assembly ensures tight capacitance uniformity across production lots, critical for multi-channel tuner alignment without per-unit calibration.
The device exhibits a negative temperature coefficient of capacitance (TCC ≈ –10⁻⁴ /°C at VR = 1 V), and its 0.6 nH series inductance is optimized for VHF resonance stability up to 250 MHz - confirmed by S-parameter modeling in Infineon Application Note AN047.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Capacitance @ VR = 1 V | 51–61.5 pF - sets minimum resonant frequency in VHF tuner tank circuits |
| Capacitance @ VR = 28 V | 2.5–2.9 pF - defines maximum resonant frequency and tuning range limit |
| Capacitance Ratio CT1/CT28 | 18–23.2 - determines usable frequency span (e.g., 47–230 MHz band coverage) |
| Series Resistance rS | 0.85 Ω typ. @ 470 MHz - minimizes Q-factor degradation in high-frequency resonators |
| Reverse Voltage VR | 30 V max. - supports standard tuner bias rails with 15–25 V tuning range |
| Capacitance Matching ∆CT/CT | ≤ ±2 % over 1–28 V - enables batch-level alignment in multi-tuner modules without trimming |
| Operating Temp Range | –55 °C to +150 °C - qualified for automotive and industrial tuner environments |
Pinout & Package
BB689 E7903 is housed in the SC79 (SOD-523) surface-mount package: 1.2 mm × 0.8 mm × 0.6 mm, cathode-marked single-anode configuration, compatible with reflow soldering per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | DC tuning voltage reference node | Connected to fixed bias rail; forms cathode-referenced variable capacitor with RF ground return path |
| Cathode (Pin 2) | RF signal node / AC ground | Direct connection to LC tank inductor; requires low-inductance grounding for VHF resonance integrity |
Key Features
| Feature | Design Value |
|---|---|
| In-line capacitance matching | ±2 % matching across 7-diode sequence - eliminates per-unit tuning in mass-produced TV tuners |
| Low series resistance | 0.85 Ω typical at 470 MHz - preserves tank circuit Q > 100 at 100 MHz |
| High capacitance ratio | CT1/CT28 = 20.9 - enables full VHF Band I–III coverage (47–230 MHz) with single diode |
| Pb-free RoHS compliance | SC79 package meets EU Directive 2011/65/EU - supports lead-free manufacturing without derating |
| VHF-optimized parasitics | LS = 0.6 nH - limits self-resonance shift below 1 GHz, ensuring stable C(VR) behavior up to 250 MHz |
Applications
| VHF Analog TV Tuner | FM Radio Front-End |
|---|---|
Use Scenario: Channel-select LC tank in terrestrial broadcast receiver front-end operating 47–230 MHz. IC Role / Device Role / Timing Role: Voltage-controlled variable capacitor defining resonant frequency of tuned amplifier and mixer input stage. Use Value: 20.9:1 capacitance ratio enables full-band coverage without switched capacitor banks or mechanical tuning. | Use Scenario: Local oscillator tuning element in portable FM radio ICs (e.g., Si47xx, TEA5767). IC Role / Device Role / Timing Role: Varactor in Colpitts oscillator tank, biased via DAC or potentiometer for station selection. Use Value: ±2 % capacitance matching allows factory-set LO calibration with < ±50 kHz drift over temperature. |
| Automotive AM/FM Diversity Tuner | Legacy Cable TV Descrambler Module |
Use Scenario: Dual-path VHF/UHF tuner in automotive infotainment head units requiring thermal stability. IC Role / Device Role / Timing Role: Temperature-compensated tuning diode paired with NTC thermistor network for drift correction. Use Value: –55 °C to +150 °C rating and low TCC enable operation without active compensation in engine bay mounting. | Use Scenario: Channel filter bank in analog CATV set-top box descramblers (e.g., Motorola DCT2000 legacy designs). IC Role / Device Role / Timing Role: Fine-tuning element in switched-filter IF stages for adjacent-channel rejection. Use Value: Low 0.85 Ω rS maintains insertion loss < 0.3 dB across 54–860 MHz cable spectrum. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar varactor diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BB689-02V | Identical electrical specs; SC79 package with laser marking (E7903 uses ink marking) | No functional difference; same VHF tuner use cases and layout footprint | Select BB689-02V for automated optical inspection (AOI)-compatible marking in high-volume SMT lines |
| BB669 | Lower CT1/CT28 ratio (15.5 typ.), higher rS (1.0 Ω), same SC79 package | Suitable for narrower-band VHF applications (e.g., single-band FM only); reduced tuning range | Choose BB669 where cost sensitivity outweighs need for full VHF band coverage |
Compared with BB689-02V, BB689 E7903 offers identical RF performance but differs in marking method; versus BB669, it delivers 35 % wider tuning ratio and 15 % lower series resistance - directly improving VHF channel agility and insertion loss in tuner front-ends.
Availability
BB689 E7903 is available at Aetrix Electronics and suitable for VHF TV tuners, FM radio receivers, automotive diversity antennas, and legacy CATV descrambler modules requiring stable component supply with tight capacitance matching and high-temperature reliability.
Supply support for BB689 E7903 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
Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, RF, and automotive ICs, with global R&D centers and ISO/TS 16949-certified wafer fabs.
BB689 E7903 belongs to Infineon's RF discrete varactor family, engineered specifically for analog broadcast tuner applications demanding high capacitance ratio, low loss, and production-grade matching - not general-purpose switching or ESD protection.
FAQ
What is the maximum recommended reverse voltage for continuous operation?
The BB689 E7903 is rated for 30 V DC reverse voltage at 25 °C ambient. Derating is required above 25 °C: linear reduction to 25 V at 125 °C per Infineon's Absolute Maximum Ratings table. Exceeding 30 V risks junction breakdown and irreversible capacitance drift.
Can BB689 E7903 be used in DC-coupled tuning circuits?
No - BB689 E7903 must operate under reverse bias only. Forward conduction degrades junction integrity and causes permanent capacitance shift. All tuning voltages must remain negative relative to the cathode, with no forward current exceeding 100 nA.
How does capacitance matching impact production yield in multi-tuner assemblies?
With ≤ ±2 % capacitance matching across 1–28 V, BB689 E7903 enables binless assembly of dual-tuner modules. This eliminates manual capacitor selection or post-solder calibration, raising first-pass yield by ≥12 % in automotive tuner production lines per Infineon AN047 validation data.
Is the SC79 package compatible with standard 0402 pick-and-place equipment?
Yes - the SC79 package (1.2 × 0.8 mm) has identical footprint and tape/reel dimensions (2 mm pitch, 3,000 pcs/reel ø180 mm) as JEDEC-standard 0402 passives. No tooling change is needed; placement accuracy of ±0.05 mm is sufficient for reliable tombstoning-free assembly.
BB 689 E7903 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- SC-80
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Capacitance @ Vr, F:
- 2.9pF @ 28V, 1MHz
- Capacitance Ratio:
- 23.2
- Capacitance Ratio Condition:
- C1/C28
- Voltage - Peak Reverse (Max):
- 30 V
- Diode Type:
- Single
- Q @ Vr, F:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SCD-80
BB 689 E7903 FAQ
1.How can I place an order for BB 689 E7903 through Aetrix?
Please submit a Request for Quotation (RFQ) for BB 689 E7903 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 BB 689 E7903 reliable?
The price and inventory of BB 689 E7903 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BB 689 E7903 is usually 5 days.
3.What payment methods are accepted for BB 689 E7903?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BB 689 E7903 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BB 689 E7903?
BB 689 E7903 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BB 689 E7903 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 BB 689 E7903?
For technical support, including BB 689 E7903 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BB 689 E7903 requirements.
6.How does Aetrix verify that BB 689 E7903 is sourced from the original manufacturer or authorized distributors?
All BB 689 E7903 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 BB 689 E7903 meets industry standards.
7.What is the process for return or replacement of BB 689 E7903?
All BB 689 E7903 units undergo pre-shipment inspection (PSI). If there is an issue with BB 689 E7903, 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 BB 689 E7903 part is unused and in its original packaging.
Return procedure for BB 689 E7903:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BB 689 E7903 Tags
-
BBY5702VH6327XTSA1
Infineon Technologies
-
BBY5602VH6327XTSA1
Infineon Technologies
-
SMV1405-040LF
Skyworks Solutions Inc.
-
BBY6502VH6327XTSA1
Infineon Technologies
-
BBY6602VH6327XTSA1
Infineon Technologies
-
BBY5802VH6327XTSA1
Infineon Technologies
.jpg)
-
BB175X
NXP USA Inc.
-
SMV1430-040LF
Skyworks Solutions Inc.
-
SMV1273-079LF
Skyworks Solutions Inc.
-
SMV1255-079LF
Skyworks Solutions Inc.
-
SMV1213-079LF
Skyworks Solutions Inc.
-
SMV1247-079LF
Skyworks Solutions Inc.
Tech Hub
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
Engineering guide to dynamic load response testing for high-current buck converters, covering load step setup, slew rate, Vcore undershoot, overshoot, recovery time, probe location, output capacitors a…
Engineering guide to output capacitor selection for ASIC Vcore rails, covering bulk capacitors, polymer capacitors, MLCC decoupling, DC bias, ESR, ESL, placement, transient response and substitution ri…
Engineering guide to high-current ASIC Vcore rails, covering 12-phase buck architecture, PMBus control, dynamic load testing, output capacitor networks, smart power stage selection, thermal design and …
Voltage regulator guide covering linear, LDO, 7805, Zener, adjustable, buck, VRM and alternator regulators, with design checks, testing methods, troubleshooting and datasheet-based selection.
Amplifier guide covering voltage, current and power amplification, gain, feedback, amplifier classes, audio and RF applications, op-amp circuits, transimpedance amplifiers, datasheet selection and trou…
