Diodes Incorporated DDZ9694Q-7

Overview

DDZ9694Q-7 from Diodes Incorporated is a surface-mount, low-current Zener diode in SOD123 package, rated for 8.2 V nominal zener voltage (7.79–8.61 V), 50 µA test current, and 500 mW power dissipation at TL = +75°C on FR-4 PCB. It features AEC-Q101 qualification, IATF 16949 manufacturing, and is optimized for precision voltage reference and overvoltage protection in automotive body electronics and portable battery-powered sensors.

For engineers reviewing the DDZ9694Q-7 datasheet, DDZ9694Q-7 pinout, DDZ9694Q-7 application, or DDZ9694Q-7 equivalent, key selection criteria include its tight 5% zener tolerance at 50 µA, <0.1 µA reverse leakage at 6.2 V, -0.02%/°C temperature coefficient near 8.2 V, and automotive-grade traceability with matte tin annealed terminals.

Technical Context

This device operates as a two-terminal voltage reference, leveraging silicon PN junction avalanche breakdown to maintain stable reverse-bias voltage across a defined current range (50 µA to 10 mA). Its low test current enables use in ultra-low-power systems where bias current must remain below 100 µA.

The SOD123 package provides standardized thermal resistance (R_θJL = 150 °C/W) and moisture sensitivity level 1 handling, while the cathode band marking ensures unambiguous polarity identification during automated placement. No series resistor or external compensation is required for basic regulation.

Key Specifications

Pinout & Package

Two-terminal device in SOD123 plastic package (JEDEC DO-213AA equivalent); cathode identified by molded band. No internal leads or multi-pin configuration.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C8V2LT1G and MMSZ4689T1G, DDZ9694Q-7 uniquely delivers automotive-grade reliability, ultra-low 50 µA test current capability, and tighter thermal resistance - making it the only option for production-critical, battery-constrained automotive sensing nodes.

Availability

DDZ9694Q-7 is available at Aetrix Electronics and suitable for automotive cabin electronics, portable gas detection systems, and industrial battery monitoring applications requiring stable component supply, full traceability, and long-term lifecycle assurance.

Supply support for DDZ9694Q-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 centers across Asia and manufacturing in IATF 16949-certified facilities.

This part belongs to Diodes' AEC-Q101-qualified Zener diode family designed specifically for automotive voltage reference and protection functions where low bias current, high stability, and process traceability are mandatory.

FAQ

What is the maximum reverse voltage (V_R) at which DDZ9694Q-7 guarantees ≤0.1 µA leakage?

Per Electrical Characteristics Table, DDZ9694Q-7 guarantees ≤0.1 µA reverse leakage current at V_R = 6.2 V. This value is specified under standard test conditions (T_A = +25°C) and reflects the device's ability to hold off voltages well below its 8.2 V zener threshold without significant leakage-critical for preserving battery life in always-on systems.

Can DDZ9694Q-7 be used in place of a 3-terminal voltage reference IC?

No-it is a 2-terminal Zener diode requiring an external current-limiting resistor to establish I_ZT. Unlike 3-terminal references (e.g., REF30xx), it lacks built-in error amplifiers or buffered outputs. However, it achieves comparable initial accuracy (±5%) at far lower quiescent current (50 µA vs. ≥60 µA for most 3-terminal refs), making it preferable for passive, low-complexity voltage clamping.

Is the SOD123 package of DDZ9694Q-7 compatible with IPC-7351B standard footprints?

Yes-the SOD123 outline dimensions (D = 1.40–1.70 mm, E = 2.55–2.85 mm, L = 0.25–0.40 mm) match IPC-7351B "SOD123" land pattern recommendations. Diodes' suggested pad layout (available at diodes.com/package-outlines.html) aligns with IPC Class 2 requirements and supports both Type II (no-clean) and Type III (water-wash) solder pastes.

Does DDZ9694Q-7 require derating when mounted on 2-layer versus 4-layer PCBs?

Yes-its 500 mW rating assumes mounting on FR-4 with minimum recommended pad layout (1-inch² copper area) at T_L = +75°C. On 2-layer boards with limited copper pour, power dissipation must be derated per Fig. 1: at T_A = +85°C, max P_D drops to ~320 mW. For 4-layer boards with internal ground/power planes, derating is less aggressive due to improved heat spreading.