Diodes Incorporated ZMV830ATA

Overview

ZMV830ATA 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), Q ≥ 300 at 50 MHz, and ultra-low reverse leakage (200 pA typ.), enabling low-phase-noise VCXO/TCXO designs in wireless infrastructure and mobile radio front-ends.

For engineers reviewing the ZMV830ATA datasheet, ZMV830ATA pinout, ZMV830ATA application, or ZMV830ATA equivalent, key selection criteria include its hyperabrupt CV slope, SOT23 package compatibility, 25 V reverse breakdown rating, and verified performance in 25°C ambient tuning circuits requiring stable C-V linearity and minimal thermal drift.

Technical Context

ZMV830ATA employs a silicon hyperabrupt junction structure engineered to produce steep, predictable capacitance-voltage (C-V) characteristics-critical for high-resolution frequency pulling in voltage-controlled crystal oscillators. Its doping profile yields a C₂/C₂₀ ratio of 4.5–6.0 and temperature coefficient of capacitance between 300–400 ppm/°C.

The device operates with reverse bias only, exhibits ≤20 nA leakage at 20 V, and maintains Q ≥ 300 at 50 MHz under 3 V bias-enabling low-loss resonator tuning in compact SMT layouts. Its 25 V breakdown rating supports robust operation in battery-powered and wide-supply-range RF modules.

Key Specifications

Pinout & Package

ZMV830ATA is housed in a standard SOT23 plastic surface-mount package with cathode-marked anode-cathode configuration. The package measures 2.67–3.05 mm × 1.20–1.40 mm × 1.10 mm max and supports JEDEC-compliant reflow soldering.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMV2023-011LF and BBY58-02W, ZMV830ATA offers balanced C₂/C₂₀, proven 25 V robustness, and SOT23 compatibility-making it optimal for cost-sensitive, mid-frequency VCXO/TCXO designs requiring field-proven reliability and minimal calibration effort.

Availability

ZMV830ATA is available at Aetrix Electronics and suitable for VCXO frequency pulling, TCXO temperature compensation, and RF bandpass filter tuning requiring stable component supply, consistent C-V matching, and RoHS-compliant SMT assembly.

Supply support for ZMV830ATA 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 designer and manufacturer of high-performance analog and RF semiconductors, acquired by Diodes Incorporated in 2008.

ZMV830ATA belongs to the 830 series hyperabrupt varactor family, developed specifically for precision frequency control in wireless timing systems where low phase noise, repeatable C-V slope, and miniature SMT packaging were essential design requirements.

FAQ

What is the maximum recommended reverse voltage for continuous operation?

ZMV830ATA has a rated reverse breakdown voltage of 25 V, but continuous operation should be limited to ≤20 V to ensure long-term reliability and avoid accelerated aging. Derating to 15 V is advised for designs operating above 85°C ambient or subject to voltage transients.

Does ZMV830ATA require special ESD handling during assembly?

Yes-ZMV830ATA is classified as Class 1B per JEDEC JS-001 (≤250 V HBM). Standard ESD controls-including grounded workstations, ionized air, and static-dissipative packaging-are mandatory. Exposure to >500 V HBM events risks parametric shift in C-V slope or increased leakage.

Can ZMV830ATA be used in forward bias?

No-ZMV830ATA is designed exclusively for reverse-bias operation. Forward conduction degrades junction integrity, increases leakage, and permanently alters C-V characteristics. The device must remain reverse-biased at all times, including power-up/power-down sequences.

Is the SOT23 pinout compatible with ZMV829ATA and ZMV831ATA?

Yes-all 830-series ZMV parts (ZMV829ATA through ZMV836ATA) share identical SOT23 pinout, marking, and mechanical dimensions. Anode (Pin 1), cathode (Pin 2), and thermal pad (Pin 3) assignments are consistent across the series, enabling direct substitution within capacitance-binned variants.