Diodes Incorporated DDZ6V8C-7

Overview

DDZ6V8C-7 from Diodes Incorporated is a surface-mount precision Zener diode optimized for voltage regulation and reference applications in space-constrained PCB designs. It delivers a tightly controlled zener voltage range of 6.66 V to 7.01 V at 20 mA test current, with maximum zener impedance of 5 Ω at 20 mA and 150 Ω at 0.5 mA, and reverse leakage current ≤0.5 µA at 5.0 V. It is commonly used in power supply feedback loops, analog sensor biasing, and ADC reference stabilization.

For engineers reviewing the DDZ6V8C-7 datasheet, DDZ6V8C-7 pinout, DDZ6V8C-7 application, or DDZ6V8C-7 equivalent, key selection criteria include zener voltage tolerance (±2.5% typical), low dynamic impedance, temperature coefficient behavior near 6.8 V, and SOD123 package compatibility with high-density automated assembly.

Technical Context

This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown with stable V_Z under controlled current conditions. Its design targets low-noise, low-drift performance in DC bias and regulation circuits where thermal stability and repeatability are critical.

The DDZ6V8C variant belongs to the tighter-tolerance "C" grade within the DDZ series, offering improved V_Z consistency versus "B" grade parts. Its zener voltage exhibits a near-zero temperature coefficient (~0.02 %/°C) due to operation near the 6.2–6.8 V crossover point where TC transitions from negative to positive.

Key Specifications

Pinout & Package

Package: SOD123 - molded plastic case with cathode band marking; dimensions: 1.55 mm width × 2.65 mm length × 1.05 mm height; matte tin-plated alloy 42 leadframe; moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C6V8 and MMSZ4689, DDZ6V8C-7 offers superior V_Z tightness and lower dynamic impedance in the same SOD123 footprint-making it optimal for high-accuracy regulation where board space and thermal performance are constrained.

Availability

DDZ6V8C-7 is available at Aetrix Electronics and suitable for industrial power supplies, sensor interface modules, and automotive body electronics requiring stable component supply with full traceability and no obsolescence risk.

Supply support for DDZ6V8C-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 the Americas.

The DDZ series is part of Diodes' precision Zener diode product line, engineered specifically for high-stability voltage reference and regulation in commercial, industrial, and automotive applications demanding tight tolerances and robust thermal performance.

FAQ

What is the maximum continuous power dissipation for DDZ6V8C-7 at +75°C ambient?

At TL = +75°C, the maximum power dissipation is 500 mW per the datasheet's Note 6. This rating assumes proper thermal coupling to the PCB via recommended copper pad layout and applies only when the device is mounted on a standard FR-4 board with specified trace geometry and copper weight.

How does the temperature coefficient of DDZ6V8C-7 compare to lower-voltage Zeners in the same series?

DDZ6V8C-7 exhibits a near-zero temperature coefficient (~0.02 %/°C), significantly better than 5.1 V or 3.3 V Zeners in the series, which show strong negative TC (−0.07 %/°C). This results from its operation near the 6.2–6.8 V inflection point where TC crosses zero, making it ideal for stable reference applications across wide temperature ranges.

Is DDZ6V8C-7 suitable for automotive applications?

No-DDZ6V8C-7 is the commercial-grade version. The automotive-qualified variant is DDZ6V8CQ-7, which is AEC-Q101 qualified, PPAP capable, and manufactured in IATF16949-certified facilities. Only the "Q" suffix parts meet automotive reliability and change control requirements.

What is the significance of the "C" suffix in DDZ6V8C-7?

The "C" denotes the tighter zener voltage tolerance grade within the DDZ family. For 6.8 V devices, "C" specifies a 6.66–7.01 V range (±2.5%), whereas "B" grade (e.g., DDZ6V8B-7) specifies 6.49–6.83 V (±2.5% of nominal, but centered lower). The "C" grade improves yield matching in precision reference circuits.