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Diodes Incorporated DDZ9684-7
- Part No.:
- DDZ9684-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
DDZ9684-7.pdf
- Description:
- DIODE ZENER 3.3V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:287,296
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Product details
Overview
DDZ9684-7 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 low reverse leakage (7.5 µA @ VR = 1.5 V), cathode band polarity marking, and is optimized for low-bias voltage regulation in portable battery-powered systems.
For engineers reviewing the DDZ9684-7 datasheet, DDZ9684-7 pinout, DDZ9684-7 application, or DDZ9684-7 equivalent, this device serves as a precision low-power reference or clamp in space-constrained, thermally sensitive designs where stable 3.3 V regulation at microamp bias is required - especially in wearables, sensor nodes, and IoT endpoint power rails.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled voltage tolerance (±5% at IZT = 50 µA) and exhibits low dynamic impedance (typ. 120 Ω at IZ = 1 mA, TJ = 25°C). Its thermal resistance junction-to-lead is 150 °C/W, enabling reliable operation up to +150°C junction temperature.
The device uses alloy 42 leadframe with matte tin annealed finish, complies with J-STD-020 Level 1 moisture sensitivity, and is fully RoHS 3 compliant with halogen- and antimony-free "Green" construction (<900 ppm Br/Cl, <1000 ppm Sb).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Nom) | 3.3 V - Stable reference point for 3.3 V rail clamping or biasing |
| Zener Voltage Range | 3.13–3.47 V - ±5% tolerance ensures predictable regulation across production lot |
| Test Current (IZT) | 50 µA - Enables ultra-low quiescent current operation in battery-critical applications |
| Max Reverse Leakage | 7.5 µA @ VR = 1.5 V - Minimal standby power loss during non-regulation state |
| Power Dissipation | 500 mW @ TL = +75°C - Sufficient headroom for transient overvoltage clamping on standard FR-4 |
| Thermal Resistance (J-to-L) | 150 °C/W - Supports direct thermal coupling to PCB copper for passive cooling |
| Operating Temp Range | −65 to +150 °C - Validated for extended industrial and automotive under-hood environments |
Pinout & Package
Package: SOD123 - Surface-mount plastic case (UL 94V-0), 0.01 g weight, cathode indicated by molded band. Dimensions: L = 0.25–0.40 mm, D = 1.40–1.70 mm, E = 2.55–2.85 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to lower-potential node; forms reference return path in shunt regulator topology |
| Cathode | Zener breakdown terminal / voltage reference output | Connected to regulated node; provides stable 3.3 V reference when reverse biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables use in micropower circuits without compromising regulation accuracy |
| Automated assembly compatibility | SOD123 footprint with J-STD-020 Level 1 moisture rating - supports high-yield reflow without baking |
| Lead-free & Green compliance | Fully RoHS 3, halogen- and antimony-free - meets global environmental mandates without derating penalties |
| Thermal performance | RθJL = 150 °C/W - allows direct thermal path to PCB copper, reducing need for heatsinking in compact layouts |
Applications
| Portable Sensor Node Power Management | USB-C PD Auxiliary Voltage Clamp |
|---|---|
|
Use Scenario: Regulating bias voltage for MEMS accelerometers and analog front-ends in coin-cell–powered environmental sensors. IC Role / Device Role / Timing Role: Shunt Zener reference providing stable 3.3 V supply rail despite battery voltage decay from 3.6 V to 2.0 V. Use Value: Maintains ADC reference stability and sensor output linearity over full battery life with <1 µA additional load current. |
Use Scenario: Clamping auxiliary 3.3 V logic rail in USB-C PD controller subsystems during hot-plug transients. IC Role / Device Role / Timing Role: Transient voltage suppressor limiting overshoot on CC line monitoring circuitry during plug insertion. Use Value: Prevents latch-up in level-shifters by clamping spikes to ≤3.47 V with sub-100 ns response and no external drive required. |
| Industrial PLC Input Signal Conditioning | Medical Wearable Battery Monitoring |
|
Use Scenario: Providing reference voltage for 4–20 mA loop receiver input scaling in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Precision shunt reference establishing 3.3 V common-mode baseline for op-amp differential receivers. Use Value: Ensures <0.1% gain error over −40 to +85°C ambient due to low TCZ (−0.02%/°C typical at 3.3 V). |
Use Scenario: Monitoring lithium coin cell voltage in ECG patch devices using resistive divider + ADC. IC Role / Device Role / Timing Role: Low-leakage voltage clamp protecting ADC input from overvoltage during battery replacement or charging events. Use Value: Limits input to 3.47 V while drawing only 7.5 µA at 1.5 V reverse bias - preserving >10-year shelf life. |
Availability
DDZ9684-7 is available at Aetrix Electronics and suitable for portable sensor nodes, USB-C PD auxiliary clamping, and industrial PLC signal conditioning requiring stable component supply with traceable sourcing and long-term lifecycle support.
Supply support for DDZ9684-7 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, energy-efficient components for industrial, computing, and consumer markets.
The DDZ9678–DDZ9717 series belongs to Diodes' low-current Zener diode product line, engineered specifically for ultra-low-power voltage reference and clamping in battery-operated and thermally constrained applications.
FAQ
What is the maximum reverse voltage (VR) at which DDZ9684-7 guarantees ≤7.5 µA leakage?
DDZ9684-7 guarantees ≤7.5 µA reverse leakage current at VR = 1.5 V, per Electrical Characteristics Table in DS30410 Rev. 17–2. This value is measured at TA = +25°C with short-duration pulse testing to minimize self-heating effects.
Can DDZ9684-7 be used in place of a 3.3 V voltage reference IC in precision applications?
No - DDZ9684-7 is a Zener diode, not a buffered reference IC. It lacks active regulation, temperature compensation, or low-output-impedance drive. It provides adequate stability for clamping and coarse biasing but not for high-accuracy DAC/ADC references requiring <10 ppm/°C drift.
Is DDZ9684-7 qualified for automotive applications?
No - only the Q-suffix variants (e.g., DDZ9684Q-7) are AEC-Q101 qualified and PPAP capable. DDZ9684-7 is the standard industrial-grade version and is not certified for automotive use.
What is the typical zener impedance (ZZT) of DDZ9684-7 at 1 mA test current?
The typical zener impedance (ZZT) of DDZ9684-7 is 120 Ω at IZ = 1 mA and TJ = 25°C, as shown in Figure 11 of DS30410. This value increases significantly below 100 µA and rises with temperature.
DDZ9684-7 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
DDZ9684-7 FAQ
1.How can I place an order for DDZ9684-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ9684-7 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 DDZ9684-7 reliable?
The price and inventory of DDZ9684-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ9684-7 is usually 5 days.
3.What payment methods are accepted for DDZ9684-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ9684-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ9684-7?
DDZ9684-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ9684-7 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 DDZ9684-7?
For technical support, including DDZ9684-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ9684-7 requirements.
6.How does Aetrix verify that DDZ9684-7 is sourced from the original manufacturer or authorized distributors?
All DDZ9684-7 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 DDZ9684-7 meets industry standards.
7.What is the process for return or replacement of DDZ9684-7?
All DDZ9684-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ9684-7, 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 DDZ9684-7 part is unused and in its original packaging.
Return procedure for DDZ9684-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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