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Diodes Incorporated DDZ9684Q-7
- Part No.:
- DDZ9684Q-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
DDZ9684Q-7.pdf
- Description:
- DIODE ZENER 3.3V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:3,848
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Product details
Overview
DDZ9684Q-7 from Diodes Incorporated is a surface-mount, low-current Zener diode in SOD123 package, rated for 3.3 V nominal zener voltage (3.13–3.47 V), 50 µA test current, and 500 mW power dissipation at TL = +75°C on FR-4 PCB. It features AEC-Q101 qualification, automotive PPAP capability, and is optimized for low-bias voltage regulation in battery-powered sensor nodes and portable instrumentation.
For engineers reviewing the DDZ9684Q-7 datasheet, DDZ9684Q-7 pinout, DDZ9684Q-7 application, or DDZ9684Q-7 equivalent, this part delivers stable low-current zener reference performance with tight voltage tolerance, ultra-low leakage (<7.5 µA @ VR = 1.5 V), and IATF 16949-certified manufacturing - critical for automotive body electronics, wearables, and precision analog front-ends.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified zener voltage of 3.3 V at 50 µA test current, exhibiting low dynamic impedance (typ. ~120 Ω at IZ = 5 mA) and temperature coefficient near zero crossing (~0.02 %/°C at 3.3 V). Its thermal resistance junction-to-lead is 150 °C/W, enabling reliable operation under moderate ambient conditions when mounted per recommended SOD123 pad layout.
The device uses alloy-42 leadframe with matte tin annealed finish, compliant with MIL-STD-202 solderability requirements. Moisture sensitivity level is J-STD-020 Level 1, and it carries cathode band marking for unambiguous polarity identification - essential for automated optical inspection and high-yield SMT assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.3 V nominal (3.13–3.47 V range at IZT = 50 µA); enables precise low-voltage rail clamping and reference generation. |
| Power Dissipation (PD) | 500 mW at TL = +75°C on FR-4; supports continuous regulation in compact, thermally constrained PCB layouts. |
| Reverse Leakage (IR) | <7.5 µA at VR = 1.5 V; ensures minimal quiescent current draw in always-on battery systems. |
| Thermal Resistance (RθJL) | 150 °C/W junction-to-lead; allows direct thermal path to PCB copper for improved reliability in automotive under-hood modules. |
| Package | SOD123 surface-mount case; compatible with standard 0805 footprint and reflow profiles (MSL Level 1). |
| AEC-Q101 Qualified | Validated for automotive applications including body control modules and infotainment power rails. |
Pinout & Package
DDZ9684Q-7 uses the SOD123 plastic molded package (UL 94V-0), with cathode indicated by a visible band on the case. The device has two terminals: anode and cathode - no internal connections beyond the PN junction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased terminal during zener operation | Connected to regulated voltage node; polarity must be observed to avoid forward conduction and regulation failure. |
| Anode | Reference/ground return path | Typically tied to system ground or lower-potential rail; forms current path with series resistor for biasing. |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - reduces bias resistor power loss and extends battery life in IoT sensors. |
| AEC-Q101 qualification | Validated for automotive use with full PPAP documentation and IATF 16949 manufacturing traceability. |
| Halogen- and antimony-free "Green" construction | Meets <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - satisfies global environmental compliance mandates. |
| Lead-free and RoHS 3 compliant | Fully compliant with EU Directive 2015/863/EU - suitable for export-controlled and medical-adjacent designs. |
Applications
| Automotive Body Control Module | Portable Medical Sensor Node |
|---|---|
|
Use Scenario: Voltage reference for microcontroller ADC input scaling in door module LIN transceivers. IC Role / Device Role / Timing Role: Zener reference diode providing stable 3.3 V reference point for analog signal conditioning. Use Value: Tight 3.13–3.47 V tolerance ensures consistent ADC code mapping across temperature and unit variance. |
Use Scenario: Low-power voltage clamp for ECG front-end op-amp supply rails in wearable patch monitors. IC Role / Device Role / Timing Role: Reverse-biased zener regulating supply headroom to prevent op-amp saturation during motion-induced transients. Use Value: 7.5 µA max leakage at 1.5 V ensures sub-1 µA standby current contribution - critical for multi-week battery life. |
| Industrial Temperature Transmitter | Smart Home Smoke Detector MCU Reference |
|
Use Scenario: Precision biasing of RTD bridge excitation current source in 4–20 mA loop-powered transmitters. IC Role / Device Role / Timing Role: Zener voltage reference stabilizing current mirror gain-setting node. Use Value: 150 °C/W RθJL enables predictable thermal drift compensation when mounted adjacent to sensing elements. |
Use Scenario: Undervoltage lockout (UVLO) threshold reference for lithium coin-cell powered smoke alarm microcontrollers. IC Role / Device Role / Timing Role: Zener-based comparator reference triggering reset when battery drops below 2.7 V. Use Value: Stable 3.3 V zener with near-zero TC at 3.3 V minimizes false alarms across –40°C to +85°C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-current zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C3V3-7-F | Same 3.3 V nominal, but rated at 300 mW PD and 10 mA IZT; higher leakage (≤5 µA @ VR = 1 V). | Lacks AEC-Q101 qualification and automotive change control; not PPAP-capable. | Select for cost-sensitive industrial consumer designs where automotive traceability is unnecessary. |
| MMSZ4683T1G | 3.3 V nominal, 500 mW PD, but specified at 10 mA IZT; higher dynamic impedance (~170 Ω) and wider VZ tolerance (2.97–3.63 V). | Not AEC-Q101 qualified; moisture sensitivity Level 1 but no IATF 16949 manufacturing statement. | Prefer for non-automotive applications requiring broader VZ tolerance and legacy design reuse. |
Compared with BZX84-C3V3-7-F and MMSZ4683T1G, DDZ9684Q-7 uniquely combines AEC-Q101 qualification, 50 µA low-current specification, and tight 3.13–3.47 V tolerance - making it the only choice for automotive-grade, battery-sensitive zener references demanding production traceability and thermal stability.
Availability
DDZ9684Q-7 is available at Aetrix Electronics and suitable for automotive body electronics, portable medical sensors, industrial 4–20 mA transmitters, and smart home safety devices requiring stable component supply with full automotive compliance documentation.
Supply support for DDZ9684Q-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 DDZ96xxQ series belongs to Diodes' AEC-Q101-qualified Zener diode product line, engineered specifically for low-power, high-stability voltage reference and regulation in automotive and portable electronics.
FAQ
What is the maximum reverse leakage current for DDZ9684Q-7 at 1.5 V?
The maximum reverse leakage current is 7.5 µA at VR = 1.5 V and TA = +25°C, as specified in the Electrical Characteristics table. This value remains stable up to +85°C per Figure 21, making it suitable for low-quiescent-current designs where standby power budget is critical.
Is DDZ9684Q-7 compatible with standard SOD123 reflow profiles?
Yes - DDZ9684Q-7 is rated for MSL Level 1 per J-STD-020 and supports industry-standard Pb-free reflow profiles (peak 260°C, 30 sec max). Its matte tin annealed finish ensures robust solder wetting, and the SOD123 outline matches IPC-7351B generic footprint recommendations.
Does DDZ9684Q-7 require derating above +75°C ambient?
Yes - power dissipation must be linearly derated above +75°C ambient per Figure 1. At +100°C, maximum allowable PD drops to approximately 368 mW (derate 3.92 mW/°C beyond +75°C), based on its 340 °C/W RθJA and 150 °C/W RθJL thermal characteristics.
How is the cathode identified on DDZ9684Q-7?
The cathode is marked by a distinct dark band on the SOD123 case body, aligned with the cathode terminal. This band is visible in top-view orientation per the marking diagram (XX YM format), and corresponds to the banded end shown in the SOD123 mechanical drawing on page 7 of DS30410 Rev. 17-2.
DDZ9684Q-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.3 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 7.5 µA @ 1.5 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
DDZ9684Q-7 FAQ
1.How can I place an order for DDZ9684Q-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ9684Q-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 DDZ9684Q-7 reliable?
The price and inventory of DDZ9684Q-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ9684Q-7 is usually 5 days.
3.What payment methods are accepted for DDZ9684Q-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ9684Q-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ9684Q-7?
DDZ9684Q-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ9684Q-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 DDZ9684Q-7?
For technical support, including DDZ9684Q-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ9684Q-7 requirements.
6.How does Aetrix verify that DDZ9684Q-7 is sourced from the original manufacturer or authorized distributors?
All DDZ9684Q-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 DDZ9684Q-7 meets industry standards.
7.What is the process for return or replacement of DDZ9684Q-7?
All DDZ9684Q-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ9684Q-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 DDZ9684Q-7 part is unused and in its original packaging.
Return procedure for DDZ9684Q-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DDZ9684Q-7 Tags
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