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Diodes Incorporated DDZ8V2CQ-7
- Part No.:
- DDZ8V2CQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
DDZ8V2CQ-7.pdf
- Description:
- DIODE ZENER 8.2V 470MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
DDZ8V2CQ-7 from Diodes Incorporated is a precision automotive-grade Zener diode in SOD123 package, with nominal zener voltage 8.2 V (min 8.03 V, max 8.45 V), zener test current 20 mA, dynamic impedance 8 Ω at IZT, and reverse leakage ≤0.5 µA at 6.5 V. It serves as a stable voltage reference or overvoltage clamp in power supply feedback loops and sensor biasing circuits.
For engineers reviewing the DDZ8V2CQ-7 datasheet, DDZ8V2CQ-7 pinout, DDZ8V2CQ-7 application, or DDZ8V2CQ-7 equivalent, this part is selected for AEC-Q101-compliant designs requiring tight VZ tolerance (±2.7%), low thermal drift, and robust solderability in automated SMT assembly.
Technical Context
This device operates in reverse breakdown mode to maintain a stable reference voltage across its cathode–anode terminals. Its 8.2 V nominal zener voltage falls in the medium-voltage range where temperature coefficient crosses zero - confirmed at +0.02 %/°C per Figure 16 - enabling minimal drift over -65°C to +150°C operating range.
Designed for surface-mount use on FR-4 PCBs, it delivers 470 mW power dissipation at TA = +25°C with RθJA = 266 °C/W (Note 7 layout) and supports high-reliability automotive applications via IATF16949 manufacturing, PPAP capability, and AEC-Q101 qualification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.03–8.45 V at IZT = 20 mA - ensures ±2.7% tolerance for accurate voltage regulation in feedback networks. |
| Zener Impedance (ZZT) | 8 Ω at IZT = 20 mA - maintains low output impedance for stable reference under varying load conditions. |
| Reverse Leakage (IR) | ≤0.5 µA at VR = 6.5 V - minimizes parasitic current draw in high-impedance bias or sensing nodes. |
| Power Dissipation (PD) | 470 mW at TA = +25°C - supports continuous operation in compact power management circuits without forced cooling. |
| Thermal Resistance (RθJA) | 266 °C/W - defines junction-to-ambient rise per watt; requires ≥1 in² copper pad for rated derating per Note 7. |
| Operating Temperature | -65°C to +150°C - enables deployment in engine control units, ADAS sensors, and under-hood electronics. |
| AEC-Q101 Qualified | Yes - validated for automotive applications with change control, PPAP documentation, and IATF16949 production. |
Pinout & Package
Package: SOD123 - surface-mount plastic case with cathode band marking; dimensions: L = 0.25–0.40 mm, D = 1.40–1.70 mm, E = 2.55–2.85 mm, He = 3.55–3.85 mm (per DS30407 Rev. 21-2, p.7).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference Ground Node | Connected to system ground or low-side return path; forms voltage reference node with cathode. |
| Cathode | Zener Output Terminal | Provides regulated voltage output; marked by band; connects to feedback point or clamping node. |
Key Features
| Feature | Design Value |
|---|---|
| Precision Zener Voltage Tolerance | ±2.7% (8.03–8.45 V @ 20 mA) - reduces calibration overhead in voltage reference and error amplifier circuits. |
| Low Dynamic Impedance | 8 Ω at 20 mA - improves regulation accuracy under transient load changes in power supply feedback paths. |
| AEC-Q101 Qualification | Validated for automotive use with PPAP support - enables direct integration into ASIL-B compatible systems without requalification. |
| Green, Halogen-Free Construction | <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - meets global environmental compliance (RoHS 3, JEDEC J-STD-020 Level 1). |
| Solderable Matte Tin Finish | MIL-STD-202 compliant - ensures reliable reflow joint formation in lead-free and mixed-technology assemblies. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Provides stable 8.2 V reference for analog-to-digital converter (ADC) biasing and op-amp offset trimming in ECU microcontroller peripherals. IC Role / Device Role / Timing Role: Precision voltage reference element in analog front-end circuitry. Use Value: Enables <±0.5% ADC full-scale accuracy over temperature due to low TC (0.02 %/°C) and tight VZ tolerance. |
Use Scenario: Clamps transients and regulates bias voltage for 4–20 mA current-loop transmitter ICs in factory automation sensors. IC Role / Device Role / Timing Role: Overvoltage protection and reference stabilization component. Use Value: Limits input rail excursions to ≤8.5 V while maintaining <0.5 µA leakage to preserve loop accuracy at low signal levels. |
| DC-DC Converter Feedback Network | Medical Instrument Power Supervision |
|
Use Scenario: Sets output voltage in isolated flyback or buck converter feedback divider, interfacing with optocoupler input or TL431 replacement circuit. IC Role / Device Role / Timing Role: Primary voltage reference in secondary-side regulation loop. Use Value: Delivers stable setpoint despite ±10% input variation and 50 kHz switching noise due to low ZZT and 120 MHz bandwidth. |
Use Scenario: Monitors main supply rail integrity in portable diagnostic devices, triggering brownout reset when voltage drops below 7.5 V. IC Role / Device Role / Timing Role: Threshold detection element in supervisor circuit. Use Value: Ensures reset assertion within 10 µs of undervoltage event using sharp knee characteristics at IZK = 0.5 mA. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C8V2LT1G | Same VZ range (8.0–8.5 V), but ±5% tolerance and no AEC-Q101 qualification; RθJA = 350 °C/W. | Commercial-grade only; unsuitable for automotive or extended-temperature industrial use. | Select when cost sensitivity outweighs reliability requirements and ambient temperature stays <85°C. |
| MMSZ5236B-TP | VZ = 8.2 V ±5%, SOD-123 package, but only RoHS-compliant (not halogen-free); PD = 350 mW. | Lacks automotive qualification and green material certification; lower power rating limits sustained regulation duty. | Choose for legacy commercial designs where Diodes' green process and PPAP are not mandated. |
Compared with BZX84-C8V2LT1G and MMSZ5236B-TP, DDZ8V2CQ-7 offers tighter tolerance, AEC-Q101 validation, halogen-free construction, and higher power handling - making it the sole choice for safety-critical automotive voltage references requiring long-term stability and supply-chain traceability.
Availability
DDZ8V2CQ-7 is available at Aetrix Electronics and suitable for automotive engine control, industrial sensor conditioning, DC-DC feedback networks, and medical power supervision requiring stable component supply across multi-year production cycles.
Supply support for DDZ8V2CQ-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 the Americas.
The DDZ series targets high-precision, high-reliability Zener applications in automotive, industrial, and medical systems - emphasizing tight voltage tolerance, low impedance, and AEC-Q101 compliance for mission-critical voltage referencing.
FAQ
What is the maximum power dissipation of DDZ8V2CQ-7 at +75°C ambient?
At TL = +75°C, DDZ8V2CQ-7 supports 500 mW power dissipation per DS30407 Rev. 21-2, page 2. This rating assumes proper PCB thermal relief (e.g., 1 in² copper pad) and applies to leadframe temperature, not ambient - critical for high-power regulator feedback designs.
Is DDZ8V2CQ-7 suitable for use in a 12 V automotive battery monitoring circuit?
Yes - its 8.2 V zener voltage and 6.5 V reverse test voltage allow safe clamping of transients up to ISO 7637-2 Pulse 5a (load dump). Combined with AEC-Q101 qualification and -65°C to +150°C operation, it meets requirements for direct connection to unregulated vehicle battery rails.
How does the temperature coefficient of DDZ8V2CQ-7 compare to lower-voltage Zeners?
DDZ8V2CQ-7 exhibits +0.02 %/°C TC (Figure 16), near the zero-TC crossover point for silicon Zeners (~6–8 V). This is significantly more stable than 5.1 V parts (e.g., DDZ5V1B at -0.06 %/°C) and avoids the rising positive TC seen above 10 V, making it optimal for wide-temperature reference designs.
Can DDZ8V2CQ-7 replace a TL431 in a shunt regulator configuration?
No - DDZ8V2CQ-7 is a two-terminal passive Zener diode, lacking the three-terminal adjustable shunt regulator functionality, internal reference, and op-amp gain of TL431. It can serve as a fixed-voltage reference in simple feedback dividers but cannot replicate programmable threshold or current-sink behavior.
DDZ8V2CQ-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):
- 8.2 V
- Tolerance:
- ±3%
- Power - Max:
- 470 mW
- Impedance (Max) (Zzt):
- 8 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 6.5 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
DDZ8V2CQ-7 FAQ
1.How can I place an order for DDZ8V2CQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ8V2CQ-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 DDZ8V2CQ-7 reliable?
The price and inventory of DDZ8V2CQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ8V2CQ-7 is usually 5 days.
3.What payment methods are accepted for DDZ8V2CQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ8V2CQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ8V2CQ-7?
DDZ8V2CQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ8V2CQ-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 DDZ8V2CQ-7?
For technical support, including DDZ8V2CQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ8V2CQ-7 requirements.
6.How does Aetrix verify that DDZ8V2CQ-7 is sourced from the original manufacturer or authorized distributors?
All DDZ8V2CQ-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 DDZ8V2CQ-7 meets industry standards.
7.What is the process for return or replacement of DDZ8V2CQ-7?
All DDZ8V2CQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ8V2CQ-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 DDZ8V2CQ-7 part is unused and in its original packaging.
Return procedure for DDZ8V2CQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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