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Diodes Incorporated DDZ9703-7
- Part No.:
- DDZ9703-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
DDZ9703-7.pdf
- Description:
- DIODE ZENER 16V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:21,475
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Product details
Overview
DDZ9703-7 from Diodes Incorporated is a surface-mount low-current Zener diode with nominal zener voltage 16 V (min 15.2 V, max 16.8 V), 500 mW power dissipation on FR-4 PCB at TL = +75°C, and reverse leakage current ≤0.05 µA at VR = 12.1 V. It uses SOD123 package, features cathode band marking, and is optimized for low-bias, battery-powered voltage reference and regulation in portable electronics.
For engineers reviewing the DDZ9703-7 datasheet, DDZ9703-7 pinout, DDZ9703-7 application, or DDZ9703-7 equivalent, this part serves as a precision low-power voltage clamp in analog sensor signal conditioning, microcontroller reset circuitry, and low-quiescent current power rail monitoring where stable 16 V reference and minimal leakage are critical.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified test current of 50 µA, enabling accurate voltage regulation under ultra-low bias conditions. Its thermal resistance junction-to-lead is 150 °C/W, supporting reliable operation up to +150 °C junction temperature.
The device exhibits a typical zener impedance of ~120 Ω at IZ = 5 mA (per Fig. 13), and its temperature coefficient is approximately +0.07 %/°C near 16 V (interpolated from Fig. 18), indicating positive drift with temperature - a key design consideration for high-stability references.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Nom) | 16 V - precise clamping threshold for 15–17 V supply rails |
| Zener Voltage Range | 15.2 V to 16.8 V - ensures production yield compliance across process variation |
| Test Current (IZT) | 50 µA - enables operation in µA-level bias networks without loading error |
| Max Reverse Leakage (IR) | ≤0.05 µA at VR = 12.1 V - preserves battery life in always-on monitoring circuits |
| Power Dissipation (PD) | 500 mW - supports transient overvoltage clamping without derating below +75°C board temp |
| Package | SOD123 - industry-standard 2-pin surface-mount footprint compatible with automated reflow |
| Junction Temp Range | −65 °C to +150 °C - suitable for industrial and automotive under-hood environments |
Pinout & Package
DDZ9703-7 is housed in a molded plastic SOD123 package with cathode indicated by a visible band on the case. The device has two terminals: anode and cathode. No internal die bonding or substrate connections beyond these two leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to system ground or lower-potential rail when used in shunt regulation |
| Cathode | Reverse breakdown terminal / Zener output node | Connected to regulated node; voltage develops across cathode-to-anode during breakdown |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - eliminates need for high-current bias resistors in battery-sensitive designs |
| Ultra-low leakage | ≤0.05 µA at 12.1 V - reduces standby current in always-on voltage monitors by >95% vs. standard Zeners |
| Thermal stability | RθJL = 150 °C/W - enables direct thermal coupling to PCB copper for predictable derating |
| Automated assembly compatibility | SOD123 footprint with matte tin annealed terminals - ensures robust solder wetting and IPC-A-610 Class 3 reliability |
| Environmental compliance | Halogen- and antimony-free, RoHS 3 compliant - meets EU and global green manufacturing requirements |
Applications
| Portable Sensor Reference | Microcontroller Reset Circuit |
|---|---|
|
Use Scenario: Providing stable 16 V reference for analog front-end amplifiers in handheld gas detectors. IC Role / Device Role / Timing Role: Shunt voltage reference for op-amp biasing and ADC reference scaling. Use Value: Enables <1 µA total quiescent current in active sensing mode while maintaining ±1.5% reference accuracy over −25 °C to +70 °C. |
Use Scenario: Generating clean, noise-immune reset signal for ARM Cortex-M0+ MCUs in smart meters. IC Role / Device Role / Timing Role: Zener-clamped RC delay element defining reset pulse width and threshold. Use Value: Eliminates external voltage supervisor IC; achieves 16 V brown-out detection with <0.1% hysteresis via resistor ratio control. |
| Battery Voltage Monitor | Low-Power LDO Feedback |
|
Use Scenario: Monitoring Li-ion pack voltage (3S configuration ≈ 12.6 V full, 9 V depleted) with alert at 12.1 V. IC Role / Device Role / Timing Role: Reverse-biased threshold detector feeding comparator input. Use Value: Delivers sub-100 nA leakage at 12.1 V - extends battery shelf life by >3 years versus 1N4744A-based solutions. |
Use Scenario: Setting output voltage of adjustable low-dropout regulator in wearable health sensors. IC Role / Device Role / Timing Role: Precision voltage reference in feedback divider network. Use Value: Achieves ±0.8% output regulation over load (10 µA–10 mA) and temperature (−20 °C to +60 °C) without trimming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C16-7-F | Same 16 V nominal, but 350 mW rating and higher IR (≤100 nA @ VR = 12 V); SOT-23 package | Higher thermal resistance (RθJA = 375 °C/W) limits sustained power handling on dense PCBs | Select for space-constrained layouts where SOT-23 footprint is preferred and 500 mW headroom is not required |
| MMSZ4687T1G | 16 V nominal, 500 mW rating, but specified at IZT = 5 mA; IR = ≤100 nA @ VR = 12 V | Higher test current demands larger bias resistor, increasing quiescent current by 100× vs. DDZ9703-7 | Select only when legacy design requires 5 mA test condition compatibility or existing BOM alignment |
Compared with BZX84-C16-7-F and MMSZ4687T1G, DDZ9703-7 uniquely delivers 500 mW capability *with* 50 µA test current and sub-50 nA leakage - making it the only choice for high-accuracy, ultra-low-power shunt references in energy-harvesting and coin-cell systems.
Availability
DDZ9703-7 is available at Aetrix Electronics and suitable for portable medical devices, battery management systems, and industrial sensor nodes requiring stable component supply with guaranteed long-term continuity and traceable green sourcing.
Supply support for DDZ9703-7 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 sales operations across Asia, Europe, and North America.
DDZ9703-7 belongs to Diodes' surface-mount low-current Zener diode family, engineered specifically for precision voltage reference and regulation in space- and power-constrained portable and battery-operated systems.
FAQ
What is the maximum continuous reverse voltage (VR) that DDZ9703-7 can withstand without breakdown?
DDZ9703-7 is rated for a maximum reverse voltage of 12.1 V before significant leakage occurs (IR ≤ 0.05 µA). Breakdown begins near its nominal zener voltage of 16 V at IZT = 50 µA. Operation above 12.1 V in non-breakdown mode is not recommended - the device is designed for controlled reverse conduction, not blocking.
Can DDZ9703-7 be used in series to achieve higher reference voltages?
Yes - multiple DDZ9703-7 diodes may be connected cathode-to-anode in series to sum zener voltages (e.g., two units yield ~32 V). However, leakage current mismatch and thermal gradients between devices will degrade overall accuracy; parallel operation is not recommended due to current hogging.
Is DDZ9703-7 suitable for automotive applications?
No - the base DDZ9703-7 variant is not AEC-Q101 qualified. For automotive use, Diodes offers the DDZ9703Q-7 variant (AEC-Q101 qualified, PPAP capable, manufactured in IATF 16949 certified facilities), which shares identical electrical characteristics but undergoes additional stress testing and change control.
How does the SOD123 package affect thermal performance compared to DO-35 or SOD-323?
The SOD123 package provides superior thermal resistance to lead (RθJL = 150 °C/W) versus SOD-323 (typically >200 °C/W) and better PCB heat spreading than DO-35 glass bodies. Its 1.55 mm × 2.65 mm footprint allows tighter layout while maintaining 500 mW dissipation on FR-4 with minimum pad layout per Diodes' recommended outline.
DDZ9703-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 16 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 50 nA @ 12.1 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
DDZ9703-7 FAQ
1.How can I place an order for DDZ9703-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ9703-7 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 DDZ9703-7 reliable?
The price and inventory of DDZ9703-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ9703-7 is usually 5 days.
3.What payment methods are accepted for DDZ9703-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ9703-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ9703-7?
DDZ9703-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ9703-7 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 DDZ9703-7?
For technical support, including DDZ9703-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ9703-7 requirements.
6.How does Aetrix verify that DDZ9703-7 is sourced from the original manufacturer or authorized distributors?
All DDZ9703-7 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 DDZ9703-7 meets industry standards.
7.What is the process for return or replacement of DDZ9703-7?
All DDZ9703-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ9703-7, 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 DDZ9703-7 part is unused and in its original packaging.
Return procedure for DDZ9703-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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