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Diodes Incorporated DDZ9689S-7
- Part No.:
- DDZ9689S-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
DDZ9689S-7.pdf
- Description:
- DIODE ZENER 5.1V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:13
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Product details
Overview
DDZ9689S-7 from Diodes Incorporated is a surface-mount precision Zener diode with nominal Zener voltage 5.1 V (min 4.85 V, max 5.36 V), 200 mW power dissipation, 50 µA maximum reverse leakage at 3 V, and SOD-323 package. It delivers sharp breakdown characteristics and tight ±5% VZ tolerance for voltage reference and regulation in low-power analog circuits.
For engineers reviewing the DDZ9689S-7 datasheet, DDZ9689S-7 pinout, DDZ9689S-7 application, or DDZ9689S-7 equivalent, key selection criteria include Zener voltage accuracy, low leakage at low reverse bias, thermal resistance (625 °C/W), RoHS-compliant matte tin terminals, and suitability for automated SMT assembly on FR-4 PCBs.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown with well-defined knee characteristics and minimal dynamic impedance across its specified test current (IZT = 5 mA). Its low 0.004 g mass and SOD-323 footprint support high-density board layouts.
The Zener exhibits a temperature coefficient of approximately –0.02 %/°C near 5.1 V, enabling stable reference performance over –65 °C to +150 °C operating range. Forward voltage is 0.9 V at 10 mA, confirming standard silicon PN junction behavior for polarity verification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.1 V nominal (4.85–5.36 V range); enables precise 5 V rail sensing and trimming |
| Power Dissipation (PD) | 200 mW; supports continuous operation up to 5 mA at 5.1 V without heatsinking |
| Reverse Leakage (IR) | 50 µA max at 3 V; ensures minimal quiescent current in standby reference circuits |
| Thermal Resistance (RθJA) | 625 °C/W; requires careful pad layout per AP02001 for reliable derating above 70 °C ambient |
| Package | SOD-323; 2.3–2.7 mm length, 1.2–1.4 mm width, 0.25–0.35 mm thickness - compatible with 0805 reflow profiles |
| Operating Temp | –65 °C to +150 °C; qualified for industrial and extended-temperature embedded systems |
Pinout & Package
Two-terminal device in SOD-323 plastic package with cathode band marking. Terminals are matte tin–plated Alloy 42 leads; polarity confirmed by black band adjacent to cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to circuit ground or lower-potential node; used for forward voltage verification |
| Cathode | Zener breakdown terminal / Voltage reference output | Provides stable 5.1 V relative to anode when reverse-biased; marked with band |
Key Features
| Feature | Design Value |
|---|---|
| Very sharp breakdown knee | Enables accurate voltage clamping at low IZ, reducing start-up uncertainty in power-on reset circuits |
| Tight VZ tolerance (±5%) | Eliminates post-assembly trimming for 5 V reference designs, lowering BOM and test cost |
| Lead-free & RoHS compliant | Meets global environmental compliance without sacrificing solderability or reliability |
| Low moisture sensitivity (J-STD-020 Level 1) | Allows indefinite dry storage and eliminates bake requirements before SMT assembly |
Applications
| ADC Reference Voltage | Power-On Reset Circuit |
|---|---|
Use Scenario: Providing stable 5.1 V reference to 12-bit SAR ADC in battery-powered sensor node. IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference establishing VREF input for analog front-end. Use Value: Tight 4.85–5.36 V tolerance ensures <0.5 LSB error across full temperature range without calibration. | Use Scenario: Generating clean reset pulse during 3.3 V LDO power-up in microcontroller system. IC Role / Device Role / Timing Role: Zener-based threshold detector feeding RC delay network to reset IC input. Use Value: Low 50 µA leakage at 3 V prevents premature discharge of timing capacitor, ensuring consistent reset timing. |
| Low-Power Sensor Biasing | Overvoltage Clamp for I²C Lines |
Use Scenario: Supplying regulated 5.1 V bias to MEMS pressure transducer in HVAC control module. IC Role / Device Role / Timing Role: Shunt regulator maintaining constant excitation voltage despite 4.5–5.5 V supply variation. Use Value: 200 mW rating allows sustained 4.9 mA load current while holding VZ within ±20 mV drift. | Use Scenario: Protecting 3.3 V I²C SDA/SCL pins from ESD and transient overvoltage. IC Role / Device Role / Timing Role: Bidirectional clamp using back-to-back configuration (anode-to-anode) with series resistor. Use Value: Sharp 5.1 V breakdown initiates clamping before damage threshold of 3.3 V logic inputs is exceeded. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C5V1 | Same 5.1 V nominal, but ±6% tolerance (vs. ±5%), higher 900 Ω typical ZZT | Higher dynamic impedance reduces regulation accuracy under varying load | Acceptable where cost priority outweighs precision; verify stability under 1 mA–10 mA load swing |
| MMSZ5231B | 5.1 V nominal, ±5% tolerance, but 500 mW PD and SOD-123 package (larger footprint) | Higher power rating supports higher current, but incompatible with ultra-dense SOD-323 layouts | Preferred when >5 mA reference current required; requires PCB redesign for larger pad geometry |
Compared with BZX84-C5V1 and MMSZ5231B, DDZ9689S-7 uniquely balances ±5% tolerance, SOD-323 size, and 200 mW rating-making it optimal for space-constrained, precision 5 V reference designs where leakage and thermal profile are critical.
Availability
DDZ9689S-7 is available at Aetrix Electronics and suitable for voltage reference, power-on reset, low-power sensor biasing, and I²C line protection requiring stable component supply and consistent parametric performance across production lots.
Supply support for DDZ9689S-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 and manufacturing operations across Asia and the Americas.
The DDZ9689S-7 belongs to Diodes' precision Zener diode family engineered for high-accuracy voltage referencing in space- and power-constrained applications, emphasizing tight tolerance, low leakage, and robust SMT manufacturability.
FAQ
What is the recommended PCB pad layout for DDZ9689S-7?
The official recommended pad layout is documented in Diodes Application Note AP02001, specifying copper area and thermal relief to achieve the rated 625 °C/W RθJA. Use 1.05 mm pad width, 0.65 mm pad length, and 1.35 mm center-to-center spacing to match SOD-323 lead geometry and ensure coplanarity during reflow.
Does DDZ9689S-7 meet AEC-Q101 automotive qualification?
No-DDZ9689S-7 is not AEC-Q101 qualified. While it operates from –65 °C to +150 °C, only specific variants in this series (e.g., DDZ9705S) carry AEC-Q101 qualification per Note 5 in the datasheet. For automotive applications, select AEC-Q101–rated equivalents or consult Diodes' automotive-grade Zener portfolio.
How does the temperature coefficient affect voltage stability over temperature?
At 5.1 V, DDZ9689S-7 exhibits a typical temperature coefficient of –0.02 %/°C. Over –40 °C to +85 °C, this results in ≈ ±12.7 mV drift (≈ ±0.25% of 5.1 V), which remains within most 12-bit ADC reference budgets without active compensation.
Can DDZ9689S-7 be used in series or parallel configurations?
It is designed for single-device shunt operation. Series connection introduces mismatched TC and VZ drift; parallel use risks current hogging due to minor VZ variations. For higher voltage or current, select a single-device alternative (e.g., DDZ9694S for 8.2 V) rather than cascading.
DDZ9689S-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):
- 5.1 V
- Tolerance:
- ±5%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 5 µA @ 3 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
DDZ9689S-7 FAQ
1.How can I place an order for DDZ9689S-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ9689S-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 DDZ9689S-7 reliable?
The price and inventory of DDZ9689S-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ9689S-7 is usually 5 days.
3.What payment methods are accepted for DDZ9689S-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ9689S-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ9689S-7?
DDZ9689S-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ9689S-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 DDZ9689S-7?
For technical support, including DDZ9689S-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ9689S-7 requirements.
6.How does Aetrix verify that DDZ9689S-7 is sourced from the original manufacturer or authorized distributors?
All DDZ9689S-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 DDZ9689S-7 meets industry standards.
7.What is the process for return or replacement of DDZ9689S-7?
All DDZ9689S-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ9689S-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 DDZ9689S-7 part is unused and in its original packaging.
Return procedure for DDZ9689S-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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