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Home > Products > Discrete Semiconductor Products > Diodes > Variable Capacitance (Varicaps, Varactors)

Infineon Technologies BB814E7801GR1HTSA1

Name: BB814E7801GR1HTSA1
Brand: Infineon Technologies
SKU: BB814E7801GR1HTSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BB814E7801GR1HTSA1

Manufacturer:: Infineon Technologies

Category:: Variable Capacitance (Varicaps, Varactors)

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: BB814E7801GR1HTSA1.pdf

Description:: VARIABLE CAPACITANCE DIODE

Quantity:: RFQ Add To RFQ list

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Inventory:48,000

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Product details

Overview

BB814E7801GR1HTSA1 from Infineon Technologies is a silicon hyperabrupt junction varactor diode in SOT23 package with common-cathode dual-diode configuration, designed for FM radio tuner VCOs requiring high capacitance tuning ratio (2.05–2.25) at low bias (2–8 V), 43–46.5 pF @ 2 V, and ≤0.18 Ω series resistance at 100 MHz - deployed in automotive car radios.

For engineers reviewing the BB814E7801GR1HTSA1 datasheet, BB814E7801GR1HTSA1 pinout, BB814E7801GR1HTSA1 application, or BB814E7801GR1HTSA1 equivalent, key selection criteria include reverse voltage rating (18 V), capacitance matching tolerance (≤3%), Q factor (≥200 @ 100 MHz), thermal stability (−55 to +125 °C), and RoHS-compliant Pb-free packaging.

Technical Context

This dual varactor diode integrates two matched hyperabrupt junctions on a single monolithic chip with shared cathode, enabling precise tracking of capacitance vs. tuning voltage across both elements - critical for differential VCO topologies in FM band (76–108 MHz) front-ends. Its C_V vs. V_R curve is engineered for linear frequency vs. voltage response in LC-tuned oscillators.

Capacitance is specified at 1 MHz (CT2/CT8 ratio) and validated at 100 MHz for RF impedance modeling; series resistance (r_S = 0.18 Ω typ.) and Q ≥ 200 directly impact phase noise and oscillator efficiency in low-voltage (≤8 V) automotive supply environments.

Key Specifications

Parameter	Value and Actual Design Meaning
Reverse Voltage (V_R)	18 V - sets maximum DC tuning bias without leakage degradation in FM tuner VCOs
Capacitance @ 2 V	43–46.5 pF - defines low-end LC tank resonance for FM band coverage
Capacitance @ 8 V	19.1–22.7 pF - establishes high-frequency end of tuning range with minimal spread
Tuning Ratio (C_2V/C_8V)	2.05–2.25 - enables >20 MHz FM channel span with monotonic frequency sweep
Series Resistance (r_S)	0.18 Ω typ. @ 100 MHz - limits insertion loss and phase noise in VCO tank circuits
Capacitance Matching	≤3% ∆C/C - ensures <0.5% frequency tracking error between dual diodes in push-pull VCOs
Q Factor	≥200 @ 100 MHz, 2 V - sustains oscillator loop gain and spectral purity

Pinout & Package

SOT23-3 package with standard leadframe outline (JEDEC TO-236AB), 1.3 mm × 2.9 mm footprint, 0.95 mm height, Pb-free matte tin plating. Common-cathode configuration: Pin 1 = Anode 1, Pin 2 = Cathode (shared), Pin 3 = Anode 2.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Anode of Diode 1	DC tuning voltage input node for first varactor element; connects to VCO tank inductor tap
Pin 2	Common Cathode	Shared RF ground reference for both diodes; must be low-inductance connection to PCB ground plane
Pin 3	Anode of Diode 2	Independent tuning node for second varactor; enables differential or switched-capacitor tuning schemes

Key Features

Feature	Design Value
Monolithic dual-diode structure	Guarantees matched C-V curves and thermal drift between elements for stable differential VCO operation
Hyperabrupt junction profile	Delivers near-linear frequency vs. voltage response over 2–8 V tuning range in FM band
Pb-free RoHS-compliant packaging	Meets automotive ELV directive and enables reflow soldering without lead contamination risk
Coded capacitance groups	Enables binning (Group 1/2) for ±0.5 pF C_2V tolerance - simplifies production calibration
Low r_S and high Q	Minimizes tank circuit losses, improving VCO phase noise by ≥3 dB compared to standard abrupt-junction varactors

Applications

Automotive FM Radio Tuner

Portable DAB+ Receiver

Use Scenario: Integrated VCO in car radio head unit supporting 76–108 MHz reception with automatic station search.

IC Role / Device Role / Timing Role: Dual varactor providing voltage-controlled capacitance for LC tank resonance tuning.

Use Value: 2.15 typ. tuning ratio and ≤3% matching enable ±10 kHz frequency accuracy across temperature without trimmer capacitors.

Use Scenario: Compact digital audio broadcast receiver in battery-powered handheld device.

IC Role / Device Role / Timing Role: Low-voltage (3.3 V rail) varactor for fractional-N synthesizer loop filter compensation.

Use Value: 0.18 Ω r_S and Q ≥ 200 maintain EVM < 3% under 100 kHz offset in 1.536 MHz IF stage.

ISM Band Wireless Microphone

FM Transmitter Modulator

Use Scenario: 2.4 GHz ISM-band wireless mic with FM-modulated subcarrier for analog audio transmission.

IC Role / Device Role / Timing Role: Varactor-based VCO core in PLL frequency synthesizer generating 2400–2483.5 MHz carrier.

Use Value: Monolithic dual-diode tracking reduces sideband asymmetry to < −45 dBc in 50 kHz deviation modulation.

Use Scenario: Low-cost FM broadcast transmitter module for community radio (88–108 MHz).

IC Role / Device Role / Timing Role: Primary tuning element in Colpitts oscillator driving 5 W RF power amplifier.

Use Value: 18 V V_R rating supports 12 V DC bias for extended frequency swing and improved adjacent-channel rejection.

Equivalent & Alternatives

The following parts are listed as comparable options for similar varactor diode applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BBY52-02W	Single diode, 22–44 pF @ 2 V, C_2V/C_8V = 2.0, r_S = 0.25 Ω	Lacks dual-element matching; requires external balancing for differential VCOs	Use where space constraints prohibit SOT23-3 dual layout or where single-tuning suffices
SMV1232-011	Single diode, 2.5–28 pF @ 28 V, higher Q (≥300), no common-cathode option	Optimized for UHF/VHF broadband tuning; not binned for matching	Select for wideband synthesizers above 400 MHz where dual tracking is unnecessary

Compared with BB814E7801GR1HTSA1, BBY52-02W trades matching precision for lower cost in single-ended designs, while SMV1232-011 offers superior Q and bandwidth at the expense of dual-element integration and automotive-grade temperature range.

Availability

BB814E7801GR1HTSA1 is available at Aetrix Electronics and suitable for automotive infotainment systems, portable broadcast receivers, ISM-band transmitters, and FM modulator modules requiring stable component supply across extended temperature and long-lifecycle programs.

Supply support for BB814E7801GR1HTSA1 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.

BB814 belongs to Infineon's RF Varactor Diode product line, developed specifically for high-reliability FM/AM radio tuners and low-phase-noise VCOs in automotive and consumer audio equipment.

FAQ

What is the maximum reverse voltage rating for BB814E7801GR1HTSA1?

The absolute maximum reverse voltage (V_R) is 18 V at T_A = 25 °C, with peak reverse voltage (V_RM) rated at 20 V. Exceeding 18 V DC bias risks irreversible junction breakdown and increased leakage current (>200 nA at 60 °C), degrading VCO stability and phase noise performance in FM tuner applications.

How is capacitance matching verified between the two diodes?

Capacitance matching is measured at both 2 V and 8 V reverse bias with 1 MHz test signal; ∆C/C ≤ 3% is guaranteed per datasheet for same-group units (e.g., Group 1). Matching is achieved via monolithic fabrication and laser-trimmed doping profiles - not post-package sorting - ensuring thermal and voltage drift correlation.

Can BB814E7801GR1HTSA1 operate at 125 °C junction temperature?

Yes - the device is qualified for continuous operation from −55 °C to +125 °C ambient (T_op). At 125 °C, capacitance shifts ≤±5% versus 25 °C values, and IR remains <200 nA at 16 V, maintaining FM tuner channel lock integrity without derating in engine-compartment-mounted head units.

Is the SOT23 package compatible with standard reflow profiles?

Yes - the Pb-free matte tin finish supports IPC/JEDEC J-STD-020D-compliant lead-free reflow (peak 260 °C, 10 s max). Thermal pad design (0.25 mm thickness, 0.4 mm width) ensures mechanical reliability during thermal cycling; no underfill required for automotive vibration environments.

BB814E7801GR1HTSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Bulk

Product Status:: Active

Capacitance @ Vr, F:: 22.7pF @ 8V, 1MHz

Capacitance Ratio:: 2.25

Capacitance Ratio Condition:: C2/C8

Voltage - Peak Reverse (Max):: 18 V

Diode Type:: 1 Pair Common Cathode

Q @ Vr, F:: 200 @ 2V, 100MHz

Operating Temperature:: -55°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-SOT23-3-1

BB814E7801GR1HTSA1 FAQ

1.How can I place an order for BB814E7801GR1HTSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BB814E7801GR1HTSA1 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 BB814E7801GR1HTSA1 reliable?

The price and inventory of BB814E7801GR1HTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BB814E7801GR1HTSA1 is usually 5 days.

3.What payment methods are accepted for BB814E7801GR1HTSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BB814E7801GR1HTSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BB814E7801GR1HTSA1?

BB814E7801GR1HTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BB814E7801GR1HTSA1 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 BB814E7801GR1HTSA1?

For technical support, including BB814E7801GR1HTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BB814E7801GR1HTSA1 requirements.

6.How does Aetrix verify that BB814E7801GR1HTSA1 is sourced from the original manufacturer or authorized distributors?

All BB814E7801GR1HTSA1 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 BB814E7801GR1HTSA1 meets industry standards.

7.What is the process for return or replacement of BB814E7801GR1HTSA1?

All BB814E7801GR1HTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with BB814E7801GR1HTSA1, 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 BB814E7801GR1HTSA1 part is unused and in its original packaging.

Return procedure for BB814E7801GR1HTSA1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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