Diodes Incorporated DDZ9694-7

Overview

DDZ9694-7 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 range), 50 µA test current, and 500 mW power dissipation at TL = +75°C on FR-4 PCB. It features <0.1 µA reverse leakage at 6.2 V, -0.04 %/°C temperature coefficient, and is optimized for low-bias voltage reference and regulation in portable battery-powered systems.

For engineers reviewing the DDZ9694-7 datasheet, DDZ9694-7 pinout, DDZ9694-7 application, or DDZ9694-7 equivalent, key selection criteria include its tight zener voltage tolerance, ultra-low leakage at low reverse bias, SOD123 footprint compatibility with automated assembly, and suitability for precision voltage clamping in space-constrained consumer and industrial electronics.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under low-current conditions. Its specified 50 µA test current enables accurate regulation in micro-power circuits where quiescent current must be minimized - such as sensor biasing, ADC reference stabilization, and standby-mode voltage supervision.

The device exhibits a negative temperature coefficient of -0.04 %/°C near 8.2 V, ensuring predictable drift behavior across -65°C to +150°C operating range. Thermal resistance junction-to-lead is 150 °C/W, supporting reliable operation when mounted on standard FR-4 PCBs with recommended pad layout.

Key Specifications

Pinout & Package

Package: SOD123 - Surface-mount plastic case with cathode band marking; dimensions: 1.55 mm width × 2.65 mm length × 1.05 mm height; UL 94V-0 rated; moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-current Zener diode applications.

Compared with BZX84-C8V2-7-F and MMSZ5236B-7-F, DDZ9694-7 uniquely combines ±5% voltage tolerance, 0.1 µA leakage at 6.2 V, and 500 mW derated power at +75°C - making it optimal for thermally constrained, battery-sensitive designs where regulation stability and low standby current are co-critical.

Availability

DDZ9694-7 is available at Aetrix Electronics and suitable for portable sensor biasing, ADC reference stabilization, USB-C power negotiation clamp, and industrial PLC input protection requiring stable component supply across long-life product cycles.

Supply support for DDZ9694-7 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, specializing in high-reliability, energy-efficient components for industrial, computing, and consumer markets.

The DDZ9678–DDZ9717 series was designed specifically for low-current, high-stability voltage reference and clamping in space- and power-constrained applications - emphasizing tight tolerances, ultra-low leakage, and robust SMT manufacturability.

FAQ

What is the maximum reverse voltage that can be continuously applied to DDZ9694-7 without breakdown?

The DDZ9694-7 begins controlled reverse breakdown at approximately 7.79 V (minimum zener voltage). Applying reverse voltage below this threshold - e.g., ≤6.2 V - results in <0.1 µA leakage, per datasheet specification. Continuous operation below 6.2 V ensures no measurable conduction, preserving signal integrity in clamp or reference roles.

Can DDZ9694-7 be used in place of a 3-terminal voltage reference IC?

No - DDZ9694-7 is a 2-terminal shunt Zener diode requiring external current limiting. Unlike 3-terminal references (e.g., REF30xx), it lacks internal amplification, temperature compensation beyond inherent TC, or load regulation capability. It serves best as a simple, low-cost voltage clamp or coarse reference where ±5% tolerance and passive operation are acceptable.

Is DDZ9694-7 qualified for automotive applications?

The base DDZ9694-7 part is not AEC-Q101 qualified. However, the automotive-grade variant DDZ9694Q-7 is fully AEC-Q101 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities - intended for automotive infotainment, body control, and ADAS subsystems requiring change-controlled reliability.

How does thermal derating affect DDZ9694-7's usable power at 100°C ambient?

Per Figure 1 in DS30410 Rev. 17-2, power dissipation derates linearly from 500 mW at TL = +75°C to ~350 mW at TL = +100°C on FR-4 PCB. At 100°C lead temperature, maximum safe continuous power is 350 mW - corresponding to ~43 mA average zener current at 8.2 V, assuming negligible forward drop and ideal heat transfer.