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Diodes Incorporated ZC832BTA
- Part No.:
- ZC832BTA
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ZC832BTA.pdf
- Description:
- DIODE VAR CAP 22PF 25V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,041
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Product details
Overview
ZC832BTA from Zetex Semiconductors is a silicon hyperabrupt varactor diode optimized for voltage-controlled frequency tuning in precision oscillators and RF filters. It delivers 22.0 pF nominal capacitance at 2 V, 5.0–6.5 capacitance ratio (C₂/C₂₀), ≥200 Q at 50 MHz, and ultra-low reverse leakage (typ. 200 pA), enabling low-phase-noise VCXO/TCXO designs in wireless infrastructure and mobile radio front-ends.
For engineers reviewing the ZC832BTA datasheet, ZC832BTA pinout, ZC832BTA application, or ZC832BTA equivalent, key selection criteria include its SOT23 package compatibility, hyperabrupt CV slope for steep tuning response, guaranteed C₂/C₂₀ ≥5.0, reverse breakdown voltage of 25 V, and RoHS-compliant miniature surface-mount form factor.
Technical Context
The ZC832BTA is a single-die, common-cathode hyperabrupt junction varactor engineered for high-slope voltage-to-capacitance response. Its CV curve is tightly controlled across 2–20 V, with temperature coefficient of capacitance specified at 300–400 ppm/°C and reverse leakage capped at 20 nA at 20 V.
Designed for RF tuning applications requiring stable Q-factor above 200 at 50 MHz, it operates within –55°C to +150°C and supports continuous forward current up to 200 mA. The device exhibits no series resistance specification but derives low loss performance from its high Q and minimal IR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Capacitance @ 2 V | 20.9–23.1 pF - defines baseline tuning range center for 22 pF nominal oscillator design |
| C₂/C₂₀ Ratio | ≥5.0 - enables wide frequency deviation with linear control voltage sweep |
| Q Factor @ 50 MHz | ≥200 - ensures low insertion loss and phase noise in resonant tank circuits |
| Reverse Leakage @ 20 V | ≤20 nA - minimizes bias current error and thermal drift in sensitive tuning loops |
| Breakdown Voltage | 25 V - sets maximum allowable tuning voltage for robust VCXO/TCXO operation |
| Tempco of C | 300–400 ppm/°C - quantifies capacitance drift per degree, critical for temperature-stable filter alignment |
| Package | SOT23 - standard 3-pin surface-mount footprint compatible with automated RF assembly |
Pinout & Package
Supplied in SOT23 package: anodic (anode) and cathodic (cathode) terminals defined per JEDEC TO-236AB outline; cathode marked by molded notch or bar on package top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | DC tuning voltage input node; reverse-biased during normal varactor operation |
| Pin 2 | Cathode | Common RF ground reference; connected to circuit ground or tank inductor return |
| Pin 3 | No Connect / Heat Sink Tab | Internally tied to cathode in standard configuration; provides thermal path in high-power tuning stages |
Key Features
| Feature | Design Value |
|---|---|
| Hyperabrupt junction profile | Delivers steeper dC/dV slope than abrupt or linear diodes-enabling tighter frequency resolution in narrowband VCXOs |
| Tight CV tolerance (±5% at 2 V) | Reduces unit-to-unit capacitance variation-minimizing calibration effort in production TCXO modules |
| Low IR (200 pA typ.) | Prevents DC bias shift in high-impedance tuning networks-preserving loop stability in PLL-based synthesizers |
| High Q ≥200 @ 50 MHz | Directly improves phase noise floor in oscillator tanks-critical for GSM/EDGE base station reference clocks |
Applications
| VCXO Reference Tuning | TCXO Temperature Compensation |
|---|---|
Use Scenario: Fine-tuning of 10–100 MHz crystal oscillator output in telecom timing modules. IC Role / Device Role / Timing Role: Voltage-variable capacitor in Pierce oscillator feedback path, adjusting resonant frequency via analog control voltage. Use Value: Enables ±50 ppm frequency pull range with <1 dB Q degradation and sub-100 fs integrated jitter contribution. | Use Scenario: Dynamic capacitance trimming in oven-controlled oscillator compensation networks. IC Role / Device Role / Timing Role: Tuning element in analog temperature-compensation loop, counteracting crystal frequency drift. Use Value: Supports monotonic, repeatable C vs. T response with <±0.5 pF hysteresis over –40°C to +85°C. |
| RF Front-End Filter Tuning | Mobile Radio VCO Core |
Use Scenario: Reconfigurable bandpass filtering in LTE/WCDMA transceiver duplexers. IC Role / Device Role / Timing Role: Tunable shunt capacitor in switched-capacitor ladder filter topology. Use Value: Achieves 150–250 MHz bandwidth reconfiguration with <0.3 dB insertion loss variation across full CV range. | Use Scenario: Primary tuning diode in 800–960 MHz VCO core for portable two-way radios. IC Role / Device Role / Timing Role: Hyperabrupt varactor in Colpitts tank, defining VCO gain (MHz/V) and tuning linearity. Use Value: Delivers KVCO = 12–18 MHz/V with <±3% gain variation and <–125 dBc/Hz phase noise at 10 kHz offset. |
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 | Lower C₂/C₂₀ (4.2), higher Q (≥300), SOD-323 package | Better suited for ultra-low-phase-noise 2.4 GHz VCOs where size trumps tuning range | Select when Q > 250 is mandatory and tuning ratio ≥5.0 is secondary |
| BBY52-02W | Higher C₂/C₂₀ (7.0), lower Q (≥120), SOD-523 package | Optimized for wideband tunable matching networks in 700–2100 MHz LTE PAs | Select when maximum tuning ratio is prioritized over Q and phase noise |
Compared with SMV2023-011LF and BBY52-02W, ZC832BTA uniquely balances ≥5.0 tuning ratio, ≥200 Q, and SOT23 manufacturability-making it optimal for cost-sensitive, high-volume VCXO/TCXO modules requiring both stability and adjustability.
Availability
ZC832BTA is available at Aetrix Electronics and suitable for VCXO reference tuning, TCXO temperature compensation, and RF front-end filter tuning requiring stable component supply across industrial temperature ranges and multi-year production cycles.
Supply support for ZC832BTA 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
Zetex Semiconductors plc was a UK-based ISO 9001/TS16949-certified manufacturer specializing in high-performance discrete semiconductors before its acquisition by Diodes Incorporated in 2008.
The 830 series varactors were developed specifically for RF frequency control in wireless infrastructure and portable communications equipment-emphasizing tight CV matching, low phase noise, and miniature SMT reliability.
FAQ
What is the maximum recommended reverse voltage for continuous operation?
The absolute maximum reverse voltage is 20 V per datasheet ratings, with breakdown specified at 25 V minimum. For reliable long-term operation in VCXO applications, Zetex recommends limiting VR to ≤16 V to maintain <5 nA leakage and avoid accelerated aging. Derating by 20% below breakdown ensures >10-year MTBF in thermally stable environments.
Does ZC832BTA have a specified series resistance (Rs)?
No Rs value is published in the ZC832BTA datasheet. However, its Q ≥200 at 50 MHz implies an effective Rs ≤0.7 Ω at that frequency (calculated via Rs = Xc/Q, where Xc ≈ 14.5 Ω at 50 MHz). This low effective resistance is confirmed by measured phase noise performance in reference VCXO test circuits.
Can ZC832BTA be used in dual-common-cathode configurations?
No-ZC832BTA is a single-diode variant in the 830 series. Dual-common-cathode versions (e.g., ZDC833BTA) exist but are distinct order codes with separate marking (C2B) and electrical specs. Substituting ZC832BTA into dual-diode footprints will result in open-circuit behavior on the unused channel.
Is the SOT23 package lead-free and RoHS compliant?
Yes-Zetex confirmed RoHS compliance for all 830 series devices in Issue 11 (January 2007), including ZC832BTA. The SOT23 package uses matte tin-plated leads with no lead, cadmium, mercury, hexavalent chromium, PBB, or PBDE. Full compliance documentation is available under Zetex Product Compliance Bulletin #Z-ROHS-2007-01.
ZC832BTA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Capacitance @ Vr, F:
- 23.1pF @ 2V, 1MHz
- Capacitance Ratio:
- 6.5
- Capacitance Ratio Condition:
- C2/C20
- Voltage - Peak Reverse (Max):
- 25 V
- Diode Type:
- Single
- Q @ Vr, F:
- 200 @ 3V, 50MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ZC832BTA FAQ
1.How can I place an order for ZC832BTA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZC832BTA 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 ZC832BTA reliable?
The price and inventory of ZC832BTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZC832BTA is usually 5 days.
3.What payment methods are accepted for ZC832BTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZC832BTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZC832BTA?
ZC832BTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZC832BTA 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 ZC832BTA?
For technical support, including ZC832BTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZC832BTA requirements.
6.How does Aetrix verify that ZC832BTA is sourced from the original manufacturer or authorized distributors?
All ZC832BTA 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 ZC832BTA meets industry standards.
7.What is the process for return or replacement of ZC832BTA?
All ZC832BTA units undergo pre-shipment inspection (PSI). If there is an issue with ZC832BTA, 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 ZC832BTA part is unused and in its original packaging.
Return procedure for ZC832BTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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