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Diodes Incorporated DDZ9707-7
- Part No.:
- DDZ9707-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
DDZ9707-7.pdf
- Description:
- DIODE ZENER 20V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:2,819
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Product details
Overview
DDZ9707-7 from Diodes Incorporated is a surface-mount low-current Zener diode with nominal zener voltage 20 V (min 19.0 V, max 21.0 V), rated power dissipation of 500 mW at TL = +75°C on FR-4 PCB, and specified test current of 50 µA - optimized for low-bias, battery-powered voltage reference and regulation in portable electronics.
For engineers reviewing the DDZ9707-7 datasheet, DDZ9707-7 pinout, DDZ9707-7 application, or DDZ9707-7 equivalent, this device serves as a precision shunt voltage reference in power supply feedback loops, overvoltage protection circuits, and analog sensor biasing where stable low-current operation and SOD123 footprint compatibility are required.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain a stable reference voltage across its terminals under controlled current conditions. Its 50 µA test current enables ultra-low quiescent current design, while its 15.2 V maximum reverse voltage rating at IR = 0.05 µA ensures tight leakage control in high-impedance bias networks.
The device exhibits a temperature coefficient of approximately +0.06 %/°C near 20 V (per Fig. 19), indicating positive drift with temperature - a key consideration when used in unbuffered references across industrial temperature ranges (-65°C to +150°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Nom) | 20 V - stable reference point for feedback or clamping at typical operating current |
| Zener Voltage Range | 19.0 V to 21.0 V - ensures production yield compliance and design margin for 20 V nominal |
| Test Current (IZT) | 50 µA - enables use in micro-power circuits without loading sensitive bias nodes |
| Max Reverse Leakage (IR) | 0.05 µA @ VR = 15.2 V - guarantees minimal error current in high-impedance reference dividers |
| Power Dissipation | 500 mW - supports moderate power handling on standard FR-4 with 1-inch² pad at TL = +75°C |
| Package | SOD123 - industry-standard 2-pin surface-mount outline compatible with automated placement and reflow |
| Thermal Resistance (J-A) | 340 °C/W - defines derating slope: full power only up to +75°C ambient on recommended layout |
Pinout & Package
Package: SOD123 - molded plastic case, cathode band marking, matte tin–annealed terminals, UL 94V-0 rated, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node in shunt regulator configuration |
| Cathode | Zener breakdown terminal / voltage reference output | Connected to input voltage source via current-limiting resistor; provides regulated 20 V reference |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | 50 µA IZT enables integration into sub-100 µA bias chains without compromising regulation accuracy |
| Stable low-current Zener impedance | ZZ ≈ 50 Ω (typical at 20 V, per Fig. 14) ensures minimal voltage shift under load variation |
| SOD123 footprint compatibility | Standardized 2.65 mm × 1.55 mm body with 0.57 mm lead pitch supports high-density PCB layouts |
| Automated assembly readiness | Matte tin–annealed terminals meet MIL-STD-202 solderability requirements for consistent reflow yield |
| Green compliance | Halogen- and antimony-free, RoHS 3 compliant (<900 ppm Br/Cl, <1000 ppm Sb), IATF 16949 manufactured |
Applications
| Battery Management System (BMS) Cell Monitoring | IoT Sensor Node Reference Supply |
|---|---|
|
Use Scenario: Precision voltage sampling of individual Li-ion cells in multi-cell packs using high-impedance resistive dividers. IC Role / Device Role / Timing Role: Shunt Zener reference providing stable 20 V reference for ADC input scaling and overvoltage detection thresholds. Use Value: 50 µA test current minimizes divider current draw, extending battery life; ±0.5 V tolerance ensures accurate cell voltage classification within safety limits. |
Use Scenario: Providing regulated bias voltage to analog front-end (AFE) of ultra-low-power environmental sensors in wireless mesh nodes. IC Role / Device Role / Timing Role: Low-quiescent shunt reference stabilizing LDO input or op-amp bias rail in intermittent wake-up architectures. Use Value: 0.05 µA leakage at 15.2 V prevents signal path corruption in picoampere-level sensor interfaces; SOD123 size fits compact 2-layer PCBs. |
| Industrial PLC Input Protection | Medical Wearable Power Supervision |
|
Use Scenario: Overvoltage clamping on 24 V DC field inputs to protect downstream optocouplers and microcontroller GPIOs. IC Role / Device Role / Timing Role: Transient voltage suppressor operating in Zener breakdown during surge events above 20 V threshold. Use Value: 500 mW power rating handles short-duration transients; 340 °C/W RθJA allows thermal survival on standard PCB without heatsinking. |
Use Scenario: Monitoring battery voltage in Class II medical wearables to trigger low-battery alerts before critical shutdown. IC Role / Device Role / Timing Role: Precision voltage reference for comparator-based undervoltage lockout (UVLO) circuitry. Use Value: Tight 19.0–21.0 V range ensures reliable trip point across temperature; RoHS 3 and halogen-free compliance meets ISO 13485 manufacturing requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C20 (ON Semiconductor) | Same 20 V nominal, but rated at 300 mW and 5 mA IZT; higher leakage (5 µA @ 16 V) | Higher power and current suit higher-drive applications but increase quiescent loss in battery systems | Select if board space allows SO-323 and system requires higher surge energy absorption |
| MMSZ4684 (Vishay) | 20 V nominal, 500 mW, 50 µA IZT, but SOD-123 package with slightly different thermal resistance (RθJA = 300 °C/W) | Nearly identical electrical specs; minor thermal performance difference affects derating at elevated ambient | Drop-in replacement where tighter thermal margin is acceptable and Vishay sourcing is preferred |
Compared with BZX84-C20 and MMSZ4684, DDZ9707-7 offers the lowest leakage (0.05 µA) at its rated reverse voltage and matches MMSZ4684's power rating while maintaining Diodes Inc.'s AEC-Q101 qualified automotive-grade process control and traceability.
Availability
DDZ9707-7 is available at Aetrix Electronics and suitable for battery management systems, IoT sensor nodes, industrial PLC input protection, and medical wearable power supervision requiring stable component supply and long-term obsolescence management.
Supply support for DDZ9707-7 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, application-optimized components for power management, signal integrity, and protection.
DDZ9707-7 belongs to the DDZ9678–DDZ9717 family of low-current Zener diodes designed specifically for portable, battery-powered, and space-constrained applications demanding precision voltage reference with minimal quiescent current.
FAQ
What is the maximum continuous reverse voltage (VR) at which DDZ9707-7 maintains ≤0.05 µA leakage?
The datasheet specifies IR ≤ 0.05 µA at VR = 15.2 V (Electrical Characteristics table). This is not a breakdown voltage but a guaranteed leakage ceiling below the nominal 20 V zener point - critical for high-impedance bias networks where even femtoampere errors matter. Exceeding 15.2 V increases leakage exponentially per Fig. 3.
Can DDZ9707-7 be used in place of a 20 V Zener with 5 mA test current?
No - DDZ9707-7 is characterized at 50 µA, not 5 mA. Using it with 5 mA will cause excessive self-heating (ΔT ≈ 170°C rise at RθJA = 340 °C/W), shifting VZ and risking thermal runaway. It must be used with series resistance calculated for ~50 µA bias, e.g., 380 kΩ from 40 V supply.
Is DDZ9707-7 suitable for automotive applications?
The base DDZ9707-7 is standard-grade; however, the automotive-qualified variant DDZ9707Q-7 is AEC-Q101 certified, PPAP capable, and manufactured in IATF 16949 facilities. For automotive designs, DDZ9707Q-7 must be specified - it shares identical electrical specs but adds change control and extended reliability testing.
How does the SOD123 package affect thermal performance compared to DO-35 or SOD-323?
SOD123 offers 340 °C/W RθJA on FR-4 - significantly better than DO-35 (≈500 °C/W) but slightly worse than SOD-323 (≈280 °C/W). Its larger pad area improves solder joint reliability in automated assembly, while its 0.57 mm lead pitch ensures compatibility with standard pick-and-place nozzles - a balanced trade-off for cost-sensitive, medium-volume production.
DDZ9707-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 20 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 50 nA @ 15.2 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
DDZ9707-7 FAQ
1.How can I place an order for DDZ9707-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ9707-7 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 DDZ9707-7 reliable?
The price and inventory of DDZ9707-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ9707-7 is usually 5 days.
3.What payment methods are accepted for DDZ9707-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ9707-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ9707-7?
DDZ9707-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ9707-7 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 DDZ9707-7?
For technical support, including DDZ9707-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ9707-7 requirements.
6.How does Aetrix verify that DDZ9707-7 is sourced from the original manufacturer or authorized distributors?
All DDZ9707-7 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 DDZ9707-7 meets industry standards.
7.What is the process for return or replacement of DDZ9707-7?
All DDZ9707-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ9707-7, 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 DDZ9707-7 part is unused and in its original packaging.
Return procedure for DDZ9707-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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