Diodes Incorporated DDZ9707Q-7

Overview

DDZ9707Q-7 from Diodes Incorporated is a surface-mount, low-current, AEC-Q101 qualified Zener diode in SOD123 package with nominal zener voltage of 20 V (19.0–21.0 V range), 50 µA test current, and 500 mW power dissipation on FR-4 PCB at TL = +75°C. It serves as a precision voltage reference or overvoltage clamp in automotive sensor signal conditioning, battery management monitoring, and low-power MCU reset circuits.

For engineers reviewing the DDZ9707Q-7 datasheet, DDZ9707Q-7 pinout, DDZ9707Q-7 application, or DDZ9707Q-7 equivalent, key selection criteria include its 20 V zener tolerance, 0.05 µA reverse leakage at 15.2 V, temperature coefficient of +0.08 %/°C (Fig. 19), SOD123 footprint compatibility, and AEC-Q101 qualification for under-hood automotive use.

Technical Context

This Zener diode operates in reverse breakdown mode with tightly controlled voltage regulation at low bias currents (IZT = 50 µA), enabling stable reference generation in energy-constrained systems. Its thermal resistance junction-to-lead is 150 °C/W, supporting reliable operation up to +150°C junction temperature.

The device exhibits a positive temperature coefficient (+0.08 %/°C) typical for 20 V Zeners (per Fig. 19), minimizing drift across automotive ambient ranges. It is not intended for high-current regulation but optimized for sensing, clamping, and biasing where low leakage (<0.05 µA at VR = 15.2 V) and stable low-Iz performance are critical.

Key Specifications

Pinout & Package

Package: SOD123 - surface-mount plastic case (UL 94V-0), 0.01 g weight, cathode band marking, matte tin annealed terminals solderable per MIL-STD-202.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C20-7-F and MMSZ5248B-7-F, DDZ9707Q-7 delivers verified AEC-Q101 compliance, guaranteed SOD123 mechanical form, and lower leakage (0.05 µA vs. ≥0.1 µA), making it the sole choice for production automotive voltage reference designs requiring zero requalification effort.

Availability

DDZ9707Q-7 is available at Aetrix Electronics and suitable for automotive engine control units, battery management systems, and ADAS camera modules requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for DDZ9707Q-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 components for automotive, industrial, and computing markets.

The DDZ9xxxQ series belongs to Diodes' AEC-Q101 qualified Zener diode product line, engineered specifically for automotive voltage reference, clamping, and biasing applications demanding robust thermal performance and zero-defect manufacturing.

FAQ

What is the maximum allowable reverse voltage before breakdown for DDZ9707Q-7?

The DDZ9707Q-7 begins controlled reverse breakdown at its nominal zener voltage of 20 V, with guaranteed regulation between 19.0 V and 21.0 V at 50 µA test current. It is not rated for continuous operation above 21.0 V; exceeding this risks irreversible degradation. The absolute maximum reverse voltage is defined by its 500 mW power limit and thermal design - e.g., at 25°C ambient, sustained 22 V would exceed safe dissipation unless heatsinking is applied.

Is DDZ9707Q-7 compatible with lead-free reflow profiles?

Yes - DDZ9707Q-7 uses matte tin annealed terminals and is fully RoHS 3 compliant (2015/863/EU). It supports standard JEDEC J-STD-020D Level 1 moisture sensitivity and withstands peak reflow temperatures up to 260°C for 30 seconds. The SOD123 package's UL 94V-0 mold compound ensures stability during lead-free thermal cycling without delamination or cracking.

How does the temperature coefficient affect accuracy in automotive under-hood environments?

Per Figure 19, DDZ9707Q-7 has a +0.08 %/°C temperature coefficient near 20 V. Over −40°C to +150°C, this contributes ±15.2 mV/°C × 190°C ≈ ±2.89 V drift - but actual system error is mitigated by its tight initial tolerance (±1.0 V) and typical application within narrower ranges (e.g., −40°C to +125°C yields ±1.9 V). For highest accuracy, pairing with a TC-matched resistor network is recommended.

Can DDZ9707Q-7 replace a 24 V Zener in a 12 V system?

No - DDZ9707Q-7 is strictly a 20 V device (19.0–21.0 V range) and cannot substitute for a 24 V Zener like DDZ9709Q-7 (24 V, 22.8–25.2 V). Using it in place of a 24 V part would result in premature conduction, excessive current draw, and potential failure. Always match nominal zener voltage to circuit protection or reference requirements; cross-voltage substitution violates design intent and datasheet specifications.