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Diodes Incorporated DDZ16ASF-7
- Part No.:
- DDZ16ASF-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
DDZ16ASF-7.pdf
- Description:
- DIODE ZENER 15.19V 500MW SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:110,385
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Product details
Overview
DDZ16ASF-7 from Diodes Incorporated is a precision 0.5W surface-mount Zener diode with nominal zener voltage of 14.8–15.57V at 10mA test current, ±5% tolerance, 40Ω maximum zener impedance at 1kHz, and 0.07µA maximum reverse leakage at 14.1V. It operates across –65°C to +150°C and is used for voltage regulation and reference in power supply feedback loops, analog sensor biasing, and overvoltage protection circuits.
For engineers reviewing the DDZ16ASF-7 datasheet, DDZ16ASF-7 pinout, DDZ16ASF-7 application, or DDZ16ASF-7 equivalent, this part serves as a stable, low-leakage, automotive-capable voltage reference in space-constrained PCB designs requiring tight VZ tolerance and high thermal reliability on FR-4 substrates.
Technical Context
This Zener diode employs silicon planar epitaxial construction optimized for stable breakdown characteristics under pulsed and DC conditions. Its 10mA zener test current and low 0.07µA IR at VR = 14.1V enable accurate voltage referencing in low-power analog stages without significant error from leakage-induced loading.
The device exhibits a temperature coefficient near zero crossing around 15V (per Fig. 3), minimizing drift in mid-range reference applications. Its SOD323F package delivers 250°C/W junction-to-ambient thermal resistance when mounted on a 10mm × 10mm pad, supporting reliable 500mW dissipation in compact layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 14.8–15.57V @ IZT = 10mA - defines precise regulation window for feedback or reference use |
| Power Dissipation | 500mW on FR-4 PCB - supports continuous operation in thermally constrained consumer/industrial designs |
| Zener Impedance (ZZT) | ≤40Ω @ 1kHz - ensures minimal AC ripple transmission in voltage reference paths |
| Reverse Leakage (IR) | ≤0.07µA @ VR = 14.1V - prevents loading errors in high-impedance bias/reference nodes |
| Operating Temperature | –65°C to +150°C - enables deployment in under-hood automotive and industrial environments |
| Package | SOD323F - 2.5mm × 1.7mm surface-mount footprint with cathode band marking for automated placement |
| RoHS Compliance | Fully lead-free, halogen- and antimony-free "Green" construction per EU directives - meets global environmental requirements |
Pinout & Package
Package: SOD323F - molded plastic, UL 94V-0 rated, 0.004g weight, matte tin annealed terminals solderable per MIL-STD-202 Method 208. Cathode identified by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward bias; connected to lower potential node in Zener operation | Enables standard diode conduction path; referenced to ground or common return in shunt regulator topologies |
| Cathode | Current exit terminal during reverse breakdown; marked with band | Connected to regulated voltage node; determines polarity and connection orientation in feedback networks |
Key Features
| Feature | Design Value |
|---|---|
| Precision Zener voltage tolerance | ±5% (14.8–15.57V range) - reduces need for external trimming in voltage reference circuits |
| Low reverse leakage current | 0.07µA max @ 14.1V - preserves accuracy in high-impedance sensor bias and ADC reference applications |
| Thermally robust packaging | SOD323F with 250°C/W RθJA - maintains regulation stability under ambient temperature swings up to +150°C |
| Automated assembly compatibility | Lead-free, RoHS-compliant matte tin finish - ensures reliable reflow soldering and zero defects in SMT lines |
| Automotive-grade readiness | AEC-Q101 qualified option available - supports functional safety-critical subsystems with PPAP capability |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Biasing |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 15V reference to TL431 or similar error amplifier. Use Value: Tight 5% VZ tolerance and low 40Ω ZZT minimize output voltage drift and ripple coupling into control loop. |
Use Scenario: Providing stable excitation voltage to resistive temperature detectors (RTDs) in PLC analog input modules. IC Role / Device Role / Timing Role: Precision voltage source establishing known bias point for ratiometric measurement. Use Value: Sub-0.1µA leakage avoids measurement error in high-impedance RTD bridges; wide temperature range ensures field reliability. |
| Overvoltage Protection Clamp | ADC Reference Stabilization |
Use Scenario: Clamping transient surges on 12V automotive CAN bus power rails to protect transceivers and microcontrollers. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting rail voltage to ≤15.6V during load dump events. Use Value: 500mW rating sustains short-duration clamping without thermal runaway; SOD323F footprint enables placement near protected ICs. |
Use Scenario: Stabilizing reference voltage for 12-bit SAR ADCs in battery-powered data loggers. IC Role / Device Role / Timing Role: Low-drift, low-noise voltage reference replacing higher-cost bandgap ICs in cost-sensitive designs. Use Value: Near-zero TC at 15V minimizes full-scale error over temperature; 0.07µA leakage prevents reference divider loading. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C15LT1G | 15V nominal, ±5%, 300mW rating, SOT-23 package, 50Ω ZZT | Lower power handling and higher impedance reduce stability in high-current reference paths | Select when board space allows SOT-23 and thermal budget permits <300mW dissipation |
| MMSZ5245B-TP | 15V nominal, ±5%, 500mW, SOD-123 package, 30Ω ZZT, 0.1µA IR | Larger SOD-123 footprint and higher leakage limit use in ultra-low-power sensor nodes | Prefer where lower impedance is critical and PCB real estate accommodates wider 2.7mm body |
Compared with BZX84-C15LT1G and MMSZ5245B-TP, DDZ16ASF-7 offers superior thermal performance (250°C/W vs. ~350°C/W) in its SOD323F package and tighter leakage spec (0.07µA), making it optimal for high-reliability, space-constrained 15V reference designs demanding long-term stability.
Availability
DDZ16ASF-7 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, automotive overvoltage clamps, and precision ADC reference circuits requiring stable component supply and consistent parametric performance across production lots.
Supply support for DDZ16ASF-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 with ISO/TS 16949 and ISO 14001 certifications.
The DDZ series targets precision voltage reference applications where tight VZ tolerance, low leakage, and thermal stability are essential-designed specifically for modern SMT-based power management and signal conditioning systems.
FAQ
What is the maximum continuous power dissipation for DDZ16ASF-7 on a standard FR-4 PCB?
DDZ16ASF-7 is rated for 500mW continuous power dissipation when mounted on an FR-4 PCB with a 10mm × 10mm copper pad and board dimensions of 35mm × 25mm. This rating assumes still-air conditions and is derated linearly above +25°C ambient per the published power derating curve (Fig. 1), reaching zero at +150°C.
How does the zener voltage tolerance affect circuit accuracy in a feedback loop?
With a guaranteed VZ range of 14.8–15.57V (±5%), DDZ16ASF-7 introduces ≤0.77V absolute error in open-loop reference applications. In closed-loop SMPS feedback, this translates to <±1.5% output voltage variation before compensation-acceptable for most industrial and consumer power supplies without additional trimming.
Is DDZ16ASF-7 suitable for automotive applications?
DDZ16ASF-7 itself is not AEC-Q101 qualified, but Diodes Incorporated offers automotive-grade variants (e.g., DDZ16ASF-13) manufactured in IATF 16949-certified facilities with PPAP support. For non-safety-critical automotive subsystems, the standard part may be used pending internal qualification; consult Diodes' automotive product definitions page for change control details.
What is the significance of the "SF" suffix in DDZ16ASF-7?
The "SF" suffix denotes the SOD323F package variant with green molding compound and matte tin annealed terminals. The "-7" indicates tape-and-reel packaging with 3,000 units per reel. This distinguishes it from other package options (e.g., "-13" for 10,000-unit reels) and ensures compatibility with high-speed pick-and-place equipment.
DDZ16ASF-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-90, SOD-323F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 15.19 V
- Tolerance:
- ±3%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 70 nA @ 14.1 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323F
DDZ16ASF-7 FAQ
1.How can I place an order for DDZ16ASF-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ16ASF-7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DDZ16ASF-7 reliable?
The price and inventory of DDZ16ASF-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ16ASF-7 is usually 5 days.
3.What payment methods are accepted for DDZ16ASF-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ16ASF-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ16ASF-7?
DDZ16ASF-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ16ASF-7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DDZ16ASF-7?
For technical support, including DDZ16ASF-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ16ASF-7 requirements.
6.How does Aetrix verify that DDZ16ASF-7 is sourced from the original manufacturer or authorized distributors?
All DDZ16ASF-7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DDZ16ASF-7 meets industry standards.
7.What is the process for return or replacement of DDZ16ASF-7?
All DDZ16ASF-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ16ASF-7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DDZ16ASF-7 part is unused and in its original packaging.
Return procedure for DDZ16ASF-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DDZ16ASF-7 Tags
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