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Diodes Incorporated DDZ9694S-7
- Part No.:
- DDZ9694S-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
DDZ9694S-7.pdf
- Description:
- DIODE ZENER 8.2V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:83
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Product details
Overview
DDZ9694S-7 from Diodes Incorporated is a surface-mount precision Zener diode with nominal zener voltage of 8.2 V, ±3% tolerance (7.79–8.61 V), 50 µA test current, and 0.1 µA maximum reverse leakage at 6.2 V. It delivers sharp breakdown characteristics and low thermal resistance (625 °C/W) in SOD-323 package, used for voltage reference and overvoltage protection in power supply feedback loops.
For engineers reviewing the DDZ9694S-7 datasheet, DDZ9694S-7 pinout, DDZ9694S-7 application, or DDZ9694S-7 equivalent, key selection criteria include zener voltage accuracy, temperature coefficient (≈+0.04 %/°C), low leakage, SOD-323 footprint compatibility, and RoHS-compliant lead-free construction.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse bias above its specified zener voltage. Its sharp knee and tight VZ tolerance enable stable regulation in low-power analog circuits and feedback networks where precision and repeatability are critical.
Designed for thermal stability, it exhibits a positive temperature coefficient (~+0.04 %/°C) typical for 8.2 V Zeners, and maintains <0.1 µA leakage up to 6.2 V reverse bias - supporting low-quiescent-current designs in battery-powered and sensing applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.2 V nominal, 7.79–8.61 V range at IZT = 50 µA - ensures tight regulation in reference circuits. |
| Power Dissipation | 200 mW - supports operation up to ~24 mA at 8.2 V without derating on standard FR-4 PCB. |
| Reverse Leakage (IR) | ≤0.1 µA at VR = 6.2 V - minimizes error current in high-impedance voltage divider networks. |
| Zener Impedance (ZZT) | ~30 Ω typical at IZT = 50 µA - provides stable dynamic response under varying load conditions. |
| Thermal Resistance (RθJA) | 625 °C/W - defines junction-to-ambient rise per watt; requires thermal-aware layout for sustained 200 mW use. |
| Operating Temperature | −65 °C to +150 °C - suitable for industrial and automotive under-hood environments. |
Pinout & Package
Package: SOD-323 - ultra-small plastic surface-mount case (2.30–2.70 mm length, 1.20–1.40 mm width, 0.25–0.35 mm thickness), cathode marked by band, matte tin-plated terminals, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to circuit common; establishes reference potential when cathode is biased above anode. |
| Cathode | Zener breakdown terminal / Regulated output node | Connected to regulated voltage point; conducts reverse current to clamp voltage at VZ. |
Key Features
| Feature | Design Value |
|---|---|
| Very sharp breakdown knee | Enables precise voltage clamping with minimal transition region - critical for accurate reference generation. |
| Tight VZ tolerance (±3%) | Reduces binning requirements and eliminates post-production trimming in production-grade voltage references. |
| Low leakage (≤0.1 µA) | Preserves accuracy in high-resistance feedback dividers and extends battery life in portable monitoring systems. |
| SOD-323 package | Supports automated pick-and-place assembly and saves >50% board area vs. SOD-123 - ideal for space-constrained IoT nodes. |
Applications
| Switching Power Supply Feedback | ADC Reference Stabilization |
|---|---|
Use Scenario: Used in optocoupler-coupled feedback loop of isolated DC-DC converters to regulate output voltage. IC Role / Device Role / Timing Role: Precision voltage reference providing stable 8.2 V threshold for TL431-like control ICs or direct comparator input. Use Value: Maintains ±1% output regulation across line/load/temperature due to tight VZ tolerance and low tempco. |
Use Scenario: Biasing reference input of 12-bit SAR ADCs in sensor signal chains requiring stable scaling. IC Role / Device Role / Timing Role: Low-drift voltage reference source replacing higher-cost bandgap ICs in cost-sensitive measurement front-ends. Use Value: Delivers <1 LSB error contribution over −40 °C to +85 °C, enabled by predictable +0.04 %/°C tempco. |
| Overvoltage Protection Clamp | Microcontroller Reset Circuit |
Use Scenario: Placed across 5 V rail to protect downstream logic from transient surges exceeding 8.2 V. IC Role / Device Role / Timing Role: Fast-acting shunt protector limiting rail voltage during ESD or load-dump events. Use Value: Clamps within nanoseconds with <0.1 µA standby leakage - avoids false triggering while preserving system quiescent current. |
Use Scenario: Generating clean reset pulse for ARM Cortex-M microcontrollers during brown-out conditions. IC Role / Device Role / Timing Role: Threshold detector that asserts reset when VCC falls below 8.2 V × resistor divider ratio. Use Value: Enables deterministic reset timing with no external hysteresis components required due to sharp knee characteristic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C8V2 (Nexperia) | Same 8.2 V nominal, ±5% tolerance, SOT-23 package, 350 mW rating. | Larger footprint and higher power dissipation - less suitable for ultra-dense layouts. | Select when higher surge capability or legacy SOT-23 tooling is required. |
| MMSZ5235B (ON Semiconductor) | 8.2 V nominal, ±5% tolerance, SOD-123 package, 500 mW rating, higher ZZ (~40 Ω). | Higher thermal mass and lower impedance variation - better for high-current transient clamping. | Select when >200 mW peak power handling or improved surge robustness is needed. |
Compared with BZX84-C8V2 and MMSZ5235B, DDZ9694S-7 offers superior board-area efficiency (SOD-323), tighter voltage tolerance (±3% vs. ±5%), and lower leakage - making it optimal for miniaturized, precision-referenced, low-power systems where layout density and accuracy are prioritized over surge margin.
Availability
DDZ9694S-7 is available at Aetrix Electronics and suitable for switching power supplies, sensor signal conditioning, overvoltage protection circuits, and microcontroller reset networks requiring stable component supply and long-term manufacturability.
Supply support for DDZ9694S-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 DDZ9689S–DDZ9717S series was designed specifically for precision voltage reference and regulation in space-constrained, thermally demanding applications - emphasizing sharp breakdown, low leakage, and RoHS-compliant SOD-323 packaging.
FAQ
What is the maximum continuous reverse voltage this diode can withstand before breakdown?
The DDZ9694S-7 is rated for a nominal zener voltage of 8.2 V at 50 µA test current, with guaranteed breakdown occurring between 7.79 V and 8.61 V. It is not rated for continuous reverse blocking above its VZ range - operation beyond this range risks thermal runaway unless current is strictly limited by external series resistance.
Does this part meet automotive qualification standards?
No - the DDZ9694S-7 is not AEC-Q101 qualified. While the broader DDZ9689S–DDZ9717S family includes AEC-Q101-qualified variants (e.g., DDZ9705S), DDZ9694S-7 is specified for industrial and commercial applications only, with operating temperature range of −65 °C to +150 °C but no stress-test validation per automotive reliability standards.
How does the temperature coefficient affect regulation accuracy over temperature?
At 8.2 V, the DDZ9694S-7 exhibits a typical temperature coefficient of +0.04 %/°C. Over a 100 °C range (e.g., −25 °C to +75 °C), this contributes ≈±0.04 V drift - approximately ±0.5% of nominal VZ. This is acceptable for non-critical references but requires compensation in metrology-grade designs.
Can this Zener diode be used in parallel for higher current handling?
No - parallel connection of Zener diodes is not recommended due to mismatched VZ tolerances and thermal runaway risk. Even small differences in zener voltage cause one device to carry most of the current. For higher current, use a single higher-power Zener or add an external pass transistor configured as a shunt regulator.
DDZ9694S-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 8.2 V
- Tolerance:
- ±5%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 100 nA @ 6.2 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-323
DDZ9694S-7 FAQ
1.How can I place an order for DDZ9694S-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ9694S-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 DDZ9694S-7 reliable?
The price and inventory of DDZ9694S-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ9694S-7 is usually 5 days.
3.What payment methods are accepted for DDZ9694S-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ9694S-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ9694S-7?
DDZ9694S-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ9694S-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 DDZ9694S-7?
For technical support, including DDZ9694S-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ9694S-7 requirements.
6.How does Aetrix verify that DDZ9694S-7 is sourced from the original manufacturer or authorized distributors?
All DDZ9694S-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 DDZ9694S-7 meets industry standards.
7.What is the process for return or replacement of DDZ9694S-7?
All DDZ9694S-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ9694S-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 DDZ9694S-7 part is unused and in its original packaging.
Return procedure for DDZ9694S-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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