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Diodes Incorporated DDZ9681Q-7
- Part No.:
- DDZ9681Q-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
DDZ9681Q-7.pdf
- Description:
- DIODE ZENER 2.4V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:7,978
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Product details
Overview
DDZ9681Q-7 from Diodes Incorporated is a surface-mount, low-current Zener diode in SOD123 package, rated for 2.4 V nominal zener voltage (min 2.28 V, max 2.52 V) at 50 µA test current, with 500 mW power dissipation on FR-4 PCB at TL = +75°C and AEC-Q101 qualification for automotive applications.
For engineers reviewing the DDZ9681Q-7 datasheet, DDZ9681Q-7 pinout, DDZ9681Q-7 application, or DDZ9681Q-7 equivalent, this part is selected for precision low-bias voltage reference, battery-powered sensor biasing, and automotive ECU voltage clamping where stable 2.4 V regulation under microampere leakage constraints is required.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled voltage tolerance (±5% at IZT = 50 µA), low thermal resistance (RθJL = 150 °C/W), and specified leakage current of ≤2 µA at VR = 1 V. Its low test current enables operation in ultra-low-power circuits without compromising regulation accuracy.
The device exhibits a negative temperature coefficient near 2.4 V (≈−0.04 %/°C per Fig. 17), optimized for stable reference generation across −65°C to +150°C operating range. Its SOD123 package supports automated placement and reflow soldering while maintaining mechanical robustness per J-STD-020 Level 1 moisture sensitivity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.4 V nominal, 2.28–2.52 V range at IZT = 50 µA - ensures tight voltage reference for low-power analog sensing. |
| Power Dissipation (PD) | 500 mW on FR-4 PCB at TL = +75°C - supports reliable operation in compact automotive PCB layouts with minimal copper area. |
| Reverse Leakage (IR) | ≤2 µA at VR = 1 V - minimizes quiescent current draw in battery-backed circuits. |
| Thermal Resistance (RθJL) | 150 °C/W - enables efficient heat transfer to PCB trace, critical for sustained operation in engine bay environments. |
| Operating Temperature | −65°C to +150°C - meets extended-range requirements for under-hood automotive electronics. |
| AEC-Q101 Qualified | Yes - certified for automotive-grade reliability including PPAP capability and IATF 16949 manufacturing control. |
Pinout & Package
Package: SOD123 - surface-mount plastic case (UL 94V-0), 0.01 g weight, cathode band marking, matte tin annealed terminals solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node; defines polarity for reverse-bias operation. |
| Cathode | Zener breakdown terminal / regulated output node | Connected to voltage rail requiring clamping or reference; carries regulated 2.4 V when reverse-biased above VZ. |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables use in nanoampere-bias sensor front-ends without loading error. |
| AEC-Q101 qualification | Validated for automotive change control, PPAP, and IATF 16949 production - eliminates qualification overhead for Tier 1 suppliers. |
| SOD123 footprint compatibility | Standardized 1.55 mm × 2.65 mm outline with 0.57 mm lead width - ensures drop-in replacement in existing layouts. |
| Halogen & antimony free | <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - satisfies EU ELV and OEM green material compliance mandates. |
Applications
| Automotive Engine Control Unit (ECU) | Portable Gas Sensor Biasing |
|---|---|
|
Use Scenario: Voltage reference for oxygen sensor signal conditioning circuitry in engine management systems. IC Role / Device Role / Timing Role: Zener diode providing stable 2.4 V reference for ADC input scaling and op-amp biasing. Use Value: Tight ±5% VZ tolerance and −65°C to +150°C operation ensure consistent sensor calibration across extreme ambient conditions. |
Use Scenario: Low-power bias supply for electrochemical CO detection cells in handheld safety monitors. IC Role / Device Role / Timing Role: Precision shunt regulator establishing fixed bias point for microampere-level cell current measurement. Use Value: 2 µA max leakage at 1 V enables >10-year battery life in coin-cell-powered instruments. |
| Industrial PLC Input Protection | Medical Wearable Reference |
|
Use Scenario: Overvoltage clamp on 24 V digital input channels exposed to inductive switching transients. IC Role / Device Role / Timing Role: Transient voltage suppressor limiting input to 2.4 V above ground during surge events. Use Value: 500 mW power rating and fast response (<1 ns) prevent latch-up in downstream logic interfaces. |
Use Scenario: Reference voltage source for analog front-end of ECG electrode amplifier in patch-style monitors. IC Role / Device Role / Timing Role: Low-noise, low-drift shunt reference stabilizing gain-setting resistors in instrumentation amplifiers. Use Value: Negative TC (−0.04 %/°C) compensates for op-amp offset drift over body-temperature range (32–42°C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C2V4LT1G | Same 2.4 V nominal, but ±6% tolerance and 300 mW PD; no AEC-Q101 certification. | Approved for commercial industrial use only; not qualified for automotive production. | Select when cost sensitivity outweighs automotive qualification and tighter VZ tolerance is acceptable. |
| MMSZ4676T1G | 2.4 V nominal, ±5% tolerance, 500 mW rating, but only industrial temperature range (−65°C to +150°C not guaranteed). | Lacks full automotive qualification and PPAP support; limited traceability documentation. | Choose for non-safety-critical consumer electronics where AEC-Q101 is not mandated. |
Compared with BZX84-C2V4LT1G and MMSZ4676T1G, DDZ9681Q-7 uniquely combines AEC-Q101 qualification, ±5% VZ tolerance at 50 µA, and guaranteed 150°C operation - making it the sole option for production automotive voltage reference designs requiring full compliance and thermal margin.
Availability
DDZ9681Q-7 is available at Aetrix Electronics and suitable for automotive ECU design, portable gas sensor development, and industrial PLC input protection requiring stable component supply with full traceability and lifecycle continuity.
Supply support for DDZ9681Q-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 distribution operations across Asia, Europe, and North America.
The DDZ9678–DDZ9717 series was developed specifically for automotive and portable electronics applications demanding low-leakage, low-test-current Zener references in standardized SOD123 packaging with full AEC-Q101 compliance.
FAQ
What is the maximum reverse leakage current for DDZ9681Q-7 at 1 V?
The maximum reverse leakage current is 2 µA at VR = 1 V, measured per DS30410 Rev. 17-2 Section "Electrical Characteristics". This value is confirmed across the full −65°C to +150°C operating range and is critical for battery-life calculations in always-on sensor nodes.
Is DDZ9681Q-7 compatible with lead-free reflow profiles?
Yes - the device uses matte tin annealed terminals and is rated for standard JEDEC J-STD-020 lead-free reflow profiles (peak 260°C). Its SOD123 package has been validated for compatibility with IPC-A-610 Class 2 and Class 3 assembly standards.
Does DDZ9681Q-7 require derating above +75°C ambient?
Yes - power dissipation must be linearly derated above TL = +75°C at 3.33 mW/°C (based on RθJA = 340 °C/W), as shown in Figure 1 of DS30410. At +105°C board temperature, maximum allowable power drops to 417 mW.
Can DDZ9681Q-7 replace DDZ9681-7 in existing designs?
Yes - DDZ9681Q-7 shares identical electrical specifications and SOD123 mechanical dimensions with DDZ9681-7, differing only in AEC-Q101 qualification, PPAP capability, and IATF 16949 manufacturing controls. No layout or schematic changes are required for upgrade.
DDZ9681Q-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):
- 2.4 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 2 µA @ 1 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
DDZ9681Q-7 FAQ
1.How can I place an order for DDZ9681Q-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ9681Q-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 DDZ9681Q-7 reliable?
The price and inventory of DDZ9681Q-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ9681Q-7 is usually 5 days.
3.What payment methods are accepted for DDZ9681Q-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ9681Q-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ9681Q-7?
DDZ9681Q-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ9681Q-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 DDZ9681Q-7?
For technical support, including DDZ9681Q-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ9681Q-7 requirements.
6.How does Aetrix verify that DDZ9681Q-7 is sourced from the original manufacturer or authorized distributors?
All DDZ9681Q-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 DDZ9681Q-7 meets industry standards.
7.What is the process for return or replacement of DDZ9681Q-7?
All DDZ9681Q-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ9681Q-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 DDZ9681Q-7 part is unused and in its original packaging.
Return procedure for DDZ9681Q-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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