Diodes Incorporated DDZ16Q-7

Overview

DDZ16Q-7 from Diodes Incorporated is a surface-mount precision Zener diode with nominal zener voltage 15.69–16.51 V, ±3% tolerance at 10 mA test current, 18 Ω dynamic impedance at 10 mA, and 0.05 µA reverse leakage at 12 V. It operates from –65 °C to +150 °C and delivers stable voltage reference in low-power analog circuits, such as sensor biasing and ADC reference stabilization.

For engineers reviewing the DDZ16Q-7 datasheet, DDZ16Q-7 pinout, DDZ16Q-7 application, or DDZ16Q-7 equivalent, this device serves as a high-stability, AEC-Q101 qualified voltage reference for automotive body control modules, industrial power supply feedback loops, and precision instrumentation front-ends where tight V_Z tolerance and low temperature coefficient are critical.

Technical Context

This Zener diode uses silicon planar epitaxial construction to achieve precise breakdown characteristics and low dynamic impedance. Its 18 Ω Z_ZT at I_ZT = 10 mA ensures minimal output voltage variation under load transients, while its <±0.05 %/°C temperature coefficient (typ.) over 0–70 °C enables stable operation across thermal gradients.

The device is optimized for SOD123 package mounting on FR-4 PCBs with 1 in² copper pad (R_θJA = 266 °C/W), supporting continuous power dissipation up to 470 mW at 25 °C ambient. Cathode band marking provides unambiguous polarity identification for automated placement.

Key Specifications

Pinout & Package

Package: SOD123 - surface-mount plastic case with cathode band marking; dimensions: 2.65 mm × 1.55 mm × 1.05 mm (L × W × H); moisture sensitivity level 1 per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C16LT1G and MMSZ5245B-TP, DDZ16Q-7 offers superior V_Z tolerance (±3% vs. ±5%), lower Z_ZT, and full automotive qualification-making it the only choice for safety-critical vehicle subsystems requiring PPAP documentation and zero-defect reliability.

Availability

DDZ16Q-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor transmitters, and medical power supply designs requiring stable component supply with full AEC-Q101 traceability and IATF16949 manufacturing assurance.

Supply support for DDZ16Q-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 device belongs to the DDZ series of precision Zener diodes engineered specifically for high-reliability automotive and industrial voltage reference applications where tight tolerance, low tempco, and AEC-Q101 compliance are mandatory.

FAQ

What is the maximum continuous power dissipation for DDZ16Q-7 at 75 °C ambient?

At T_L = +75 °C, DDZ16Q-7 supports 500 mW continuous power dissipation per the datasheet's Note 6. This rating assumes proper PCB thermal relief using a 1 in² copper pad on FR-4, enabling reliable operation in engine bay or industrial enclosure environments without forced cooling.

Is DDZ16Q-7 compatible with lead-free reflow profiles?

Yes - DDZ16Q-7 uses matte tin-annealed terminals over Alloy 42 leadframe and is fully RoHS 3 compliant (2015/863/EU). It withstands JEDEC J-STD-020D Level 1 moisture sensitivity and supports peak reflow temperatures up to 260 °C for 10 seconds, matching standard Pb-free SAC305 profiles.

How does the temperature coefficient of DDZ16Q-7 compare to lower-voltage Zeners in the same series?

DDZ16Q-7 exhibits a typical temperature coefficient of approximately +0.05 %/°C between 0 °C and 70 °C, consistent with the 12–18 V range shown in Figure 17. This is significantly better than sub-6 V Zeners (which show negative TC) and more stable than >24 V devices (where TC rises above +0.08 %/°C), making it optimal for mid-range reference stability.

Can DDZ16Q-7 be used in place of DDZ16B-7 in existing designs?

Yes - DDZ16Q-7 is the automotive-qualified variant of DDZ16B-7, sharing identical electrical specifications, SOD123 package, and marking code (YY). The "Q" suffix denotes AEC-Q101 qualification, PPAP capability, and IATF16949 manufacturing, with no electrical or mechanical differences affecting drop-in replacement.