Diodes Incorporated DDZ22DSF-7

Overview

DDZ22DSF-7 from Diodes Incorporated is a precision 22 V Zener diode in SOD323F package, rated for 500 mW power dissipation on FR-4 PCB, with ±2.5% zener voltage tolerance (21.52–22.63 V at 5 mA), 55 Ω dynamic impedance at 1 kHz, and 0.07 µA reverse leakage at 20.4 V. It serves as a stable voltage reference in low-power analog monitoring circuits.

For engineers reviewing the DDZ22DSF-7 datasheet, DDZ22DSF-7 pinout, DDZ22DSF-7 application, or DDZ22DSF-7 equivalent, this device is selected for high-accuracy voltage regulation in space-constrained industrial sensor signal conditioning, automotive body control modules, and portable battery-powered instrumentation where thermal stability and tight V_Z tolerance are critical.

Technical Context

This Zener diode operates in reverse breakdown mode with a nominal zener voltage of 22 V at test current I_ZT = 5 mA. Its temperature coefficient is +11.5 mV/°C (typical), optimized for minimal drift across –65°C to +150°C ambient range.

The device uses a planar epitaxial construction with cathode-band polarity marking and matte tin–annealed copper alloy terminals. Thermal resistance R_θJA is 250°C/W when mounted on a 10 mm × 10 mm FR-4 pad, enabling predictable derating per Figure 1 in the datasheet.

Key Specifications

Pinout & Package

Package: SOD323F - ultra-small surface-mount plastic package (2.50 mm × 1.70 mm × 0.95 mm), moisture sensitivity level 1, halogen- and antimony-free "Green" compound, UL 94V-0 rated.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener reference applications.

Compared with BZX84-C22LT1G and MMSZ5247B-TP, DDZ22DSF-7 delivers superior voltage accuracy (±2.5% vs. ±5%), lower leakage, and a smaller SOD323F footprint-making it optimal for next-generation space- and precision-constrained industrial and automotive modules.

Availability

DDZ22DSF-7 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, automotive body control modules, and portable battery-powered instrumentation requiring stable component supply and long-term manufacturability.

Supply support for DDZ22DSF-7 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

This part belongs to the DDZ series of precision Zener diodes, engineered specifically for high-stability voltage reference and regulation in automotive, industrial, and medical applications demanding tight tolerances and robust thermal performance.

FAQ

What is the maximum continuous reverse current for reliable operation?

The DDZ22DSF-7 is rated for 5 mA test current (I_ZT) and supports continuous reverse current up to 22.7 mA at 25°C ambient before exceeding its 500 mW power limit. Derating is required above 25°C per the curve in Figure 1 of DS31987 Rev. 23–2, reaching ~310 mW at 85°C ambient.

Does this Zener diode meet AEC-Q200 stress testing requirements?

No-DDZ22DSF-7 is not AEC-Q200 qualified. While manufactured in IATF 16949 certified facilities and suitable for automotive applications, formal qualification requires specific change control and PPAP documentation. For AEC-Q200-compliant alternatives, contact Diodes Incorporated directly.

Can DDZ22DSF-7 be used in forward-bias applications?

Yes-it exhibits typical silicon diode forward characteristics with VF ≈ 0.9 V at 10 mA (Figure 2). However, its primary design intent is reverse-bias Zener operation; forward conduction is only specified for characterization and ESD protection context, not as a rectifier function.

How does the SOD323F package affect thermal performance compared to SOD-123?

The SOD323F package has higher thermal resistance (R_θJA = 250°C/W) than SOD-123 (typically ~200°C/W) due to smaller pad area and thinner mold compound. This requires stricter layout adherence to the 10 mm × 10 mm copper pad per Note 5 to achieve rated 500 mW dissipation.