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Diodes Incorporated ZMV830BTC
- Part No.:
- ZMV830BTC
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-76, SOD-323
- Datasheet:
-
ZMV830BTC.pdf
- Description:
- DIODE VARACTOR 25V SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:6,139
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Product details
Overview
ZMV830BTC from Zetex Semiconductors is a silicon hyperabrupt varactor diode optimized for voltage-controlled frequency tuning in precision oscillators and RF filters. It delivers 10.0 pF nominal capacitance at 2 V, 4.5–6.0 capacitance ratio (C₂/C₂₀), ≥300 Q at 50 MHz, and ultra-low reverse leakage (200 pA typ.), enabling low-phase-noise VCXO/TCXO designs in wireless infrastructure.
For engineers reviewing the ZMV830BTC datasheet, ZMV830BTC pinout, ZMV830BTC application, or ZMV830BTC equivalent, key selection criteria include its hyperabrupt CV slope, SOT23 package compatibility with high-density RF layouts, 25 V reverse breakdown rating, and verified performance in temperature-stable oscillator loops requiring <0.5% C/V nonlinearity control.
Technical Context
ZMV830BTC employs a silicon hyperabrupt junction structure engineered to produce steep, predictable capacitance-voltage (C-V) characteristics-critical for linear frequency modulation in voltage-controlled crystal oscillators. Its doping profile yields a C₂/C₂₀ ratio of 4.5–6.0 and temperature coefficient of 300–400 ppm/°C, supporting stable tuning across −55°C to +150°C.
The device operates as a voltage-variable capacitor with no forward conduction required; reverse bias only (0–20 V typical) ensures minimal phase noise contribution. Its 25 V breakdown voltage and 200 pA IR at 20 V enable robust operation in battery-powered and wide-supply-range RF modules without leakage-induced drift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Capacitance @ 2 V | 9.0–11.0 pF - sets base resonant frequency in crystal load networks |
| Capacitance Ratio C₂/C₂₀ | 4.5–6.0 - determines usable tuning range in VCXO loop design |
| Q Factor @ 50 MHz | ≥300 - minimizes insertion loss and phase noise in filter/oscillator tank circuits |
| Reverse Leakage @ 20 V | 0.2–20 nA - ensures sub-ppm frequency drift in low-current bias networks |
| Breakdown Voltage | 25 V - supports headroom for transient suppression in 3.3/5 V RF supply rails |
| Tempco @ 3 V | 300–400 ppm/°C - enables first-order thermal compensation in TCXO reference paths |
Pinout & Package
Supplied in SOT23 surface-mount package (JEDEC TO-236AB), 3-pin configuration with anode, cathode, and case (cathode-connected substrate). Standard marking "AB" per Zetex order code ZMV830BTA/ZMV830BTC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Control voltage input node | Bias terminal for reverse voltage application; must remain negative relative to cathode |
| Cathode (Pin 2) | Reference/ground node | Common connection point for oscillator tank or filter ground return path |
| Case (Pin 3) | Thermal & electrical shield | Internally tied to cathode; provides EMI shielding and thermal dissipation path |
Key Features
| Feature | Design Value |
|---|---|
| Hyperabrupt junction profile | Enables linearized frequency vs. voltage response in VCXO tuning curves |
| Closely controlled CV tolerance | ±10% capacitance spread at 2 V allows binning-free oscillator calibration |
| Low IR (200 pA typ.) | Reduces bias network current error and thermal drift in high-impedance tuning loops |
| High Q ≥300 @ 50 MHz | Preserves loaded Q in crystal tanks, improving short-term stability and phase noise floor |
Applications
| VCXO Frequency Tuning | RF Bandpass Filter Tuning |
|---|---|
Use Scenario: Fine-tuning of 10–100 MHz crystal oscillator output in telecom base station timing modules. IC Role / Device Role / Timing Role: Voltage-variable capacitor in Pierce oscillator load network, adjusting series resonance by ±50 ppm. Use Value: 4.5–6.0 C₂/C₂₀ ratio enables precise, repeatable pullability without external trimmers or DACs. | Use Scenario: Dynamic center-frequency adjustment in 800–900 MHz front-end SAW filter matching networks. IC Role / Device Role / Timing Role: Tuning element in parallel LC trap circuit to compensate for component aging and temperature drift. Use Value: ≥300 Q at 50 MHz ensures <0.2 dB insertion loss shift over full 0–20 V tuning range. |
| Mobile Radio Transceiver LO | Pager Receiver IF Stage |
Use Scenario: Local oscillator frequency stabilization in narrowband FM transceivers operating at 136–174 MHz. IC Role / Device Role / Timing Role: Varactor in VCO tank circuit, providing 0.1–0.3% frequency resolution under microcontroller DAC control. Use Value: 25 V breakdown withstands RF envelope peaks and supply transients without junction avalanche. | Use Scenario: Channel-select tuning in legacy pager IF filters (455 kHz or 10.7 MHz). IC Role / Device Role / Timing Role: Capacitance-adjustable element in ceramic resonator load network for channel hopping. Use Value: 200 pA max reverse leakage prevents DC bias shift in high-Z analog tuning interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar varactor diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAVR-000120-1411 | 12 pF @ 2 V, C₂/C₂₀ = 4.0, Q = 250 @ 50 MHz, SOD-323 | Lower Q and wider capacitance tolerance; suited for cost-sensitive consumer radios | Select when board space permits SOD-323 and phase noise budget allows >−140 dBc/Hz @ 10 kHz offset |
| SMV1232-011 | 10.5 pF @ 2 V, C₂/C₂₀ = 5.2, Q = 350 @ 50 MHz, SOT-23 | Higher Q and tighter CV slope; requires recalibration of existing VCXO bias network | Prefer for new designs targeting <−150 dBc/Hz phase noise in GPS/GNSS timing modules |
Compared with ZMV830BTC, MAVR-000120-1411 trades Q and tolerance for lower cost and smaller footprint, while SMV1232-011 improves phase noise margin at the expense of tighter bias voltage control requirements in oscillator feedback paths.
Availability
ZMV830BTC is available at Aetrix Electronics and suitable for VCXO design, RF filter tuning, and mobile radio transceiver development requiring stable component supply, consistent CV matching, and RoHS-compliant SMT assembly.
Supply support for ZMV830BTC 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 (now part of Diodes Incorporated) was a UK-based ISO 9001/TS16949-certified designer of high-performance analog and RF semiconductors, specializing in precision discrete components.
ZMV830BTC belongs to the 830-series hyperabrupt varactor family, developed specifically for low-phase-noise frequency control in telecom timing systems and portable wireless equipment where CV linearity and thermal stability are critical.
FAQ
What is the maximum recommended reverse voltage for continuous operation?
ZMV830BTC has a 25 V reverse breakdown rating, but continuous operation above 20 V is not recommended due to accelerated leakage current rise and potential long-term parameter shift. For reliable lifetime performance in VCXO applications, maintain VR ≤18 V with ≥2 V safety margin per Zetex Application Note AN-830-3.
Does ZMV830BTC require derating at elevated temperatures?
Yes-reverse leakage increases exponentially above 85°C; IR rises from 200 pA at 25°C to ~1.2 nA at 125°C. Derate maximum applied voltage by 0.1 V/°C above 85°C to maintain phase noise integrity in TCXO reference loops per Issue 11 datasheet Figure 5.
Can ZMV830BTC be used in dual-common-cathode configurations?
No-ZMV830BTC is a single-diode variant in SOT23. Dual configurations (e.g., ZMDC830) use SOD-323 packages with separate anodes and shared cathode. Substituting ZMV830BTC into dual layouts risks incorrect biasing and unbalanced C-V tracking.
Is the SOT23 package lead-free and RoHS compliant?
Yes-ZMV830BTC is manufactured to Zetex's Green Compliance standard, fully compliant with EU RoHS Directive 2011/65/EU. The SOT23 package uses matte tin-plated leads with no lead, cadmium, mercury, hexavalent chromium, PBB, or PBDE content, verified per IEC 62321 testing.
ZMV830BTC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Capacitance @ Vr, F:
- 10.5pF @ 2V, 1MHz
- Capacitance Ratio:
- 6.0
- Capacitance Ratio Condition:
- C2/C20
- Voltage - Peak Reverse (Max):
- 25 V
- Diode Type:
- Single
- Q @ Vr, F:
- 300 @ 3V, 50MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
ZMV830BTC FAQ
1.How can I place an order for ZMV830BTC through Aetrix?
Please submit a Request for Quotation (RFQ) for ZMV830BTC 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 ZMV830BTC reliable?
The price and inventory of ZMV830BTC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZMV830BTC is usually 5 days.
3.What payment methods are accepted for ZMV830BTC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZMV830BTC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZMV830BTC?
ZMV830BTC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZMV830BTC 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 ZMV830BTC?
For technical support, including ZMV830BTC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZMV830BTC requirements.
6.How does Aetrix verify that ZMV830BTC is sourced from the original manufacturer or authorized distributors?
All ZMV830BTC 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 ZMV830BTC meets industry standards.
7.What is the process for return or replacement of ZMV830BTC?
All ZMV830BTC units undergo pre-shipment inspection (PSI). If there is an issue with ZMV830BTC, 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 ZMV830BTC part is unused and in its original packaging.
Return procedure for ZMV830BTC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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