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Diodes Incorporated DDZ7V5CQ-7
- Part No.:
- DDZ7V5CQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
DDZ7V5CQ-7.pdf
- Description:
- DIODE ZENER 7.5V 470MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:4,622
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Product details
Overview
DDZ7V5CQ-7 from Diodes Incorporated is a precision automotive-grade Zener diode in SOD123 package, delivering nominal 7.46 V zener voltage at 20 mA with ±2.5% tolerance (7.29–7.67 V), 6 Ω dynamic impedance at test current, and 0.5 µA reverse leakage at 6.0 V. It serves as a stable voltage reference or overvoltage clamp in power supply feedback loops and sensor biasing circuits.
For engineers reviewing the DDZ7V5CQ-7 datasheet, DDZ7V5CQ-7 pinout, DDZ7V5CQ-7 application, or DDZ7V5CQ-7 equivalent, key selection criteria include zener voltage accuracy, low impedance at 20 mA, AEC-Q101 qualification, thermal resistance (425 °C/W on minimal pad), and SOD123 footprint compatibility with automated placement.
Technical Context
This device operates in reverse breakdown mode to maintain precise DC voltage regulation under varying load and temperature conditions. Its tight 2.5% VZ tolerance and low 6 Ω ZZT ensure minimal output deviation in closed-loop feedback paths.
Designed for automotive environments, it features AEC-Q101 qualification, IATF16949 manufacturing, and halogen/antimony-free "Green" construction. Thermal performance is specified for two mounting conditions: 425 °C/W on minimal pad (Note 8) and 266 °C/W on 1 in² copper (Note 7).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.29–7.67 V at IZT = 20 mA - defines regulated output range for reference or clamping |
| Zener Impedance (ZZT) | 6 Ω at f = 1 kHz, IZT = 20 mA - ensures low AC ripple transmission in regulation circuits |
| Reverse Leakage (IR) | 0.5 µA at VR = 6.0 V - guarantees minimal quiescent current in standby-biased applications |
| Power Dissipation (PD) | 294 mW at TA = +25°C (minimal pad layout) - sets maximum continuous DC power handling |
| Thermal Resistance (RθJA) | 425 °C/W - determines junction temperature rise per watt on standard FR-4 with minimal copper |
| Operating Temperature | −65 to +150 °C - supports under-hood and engine-control module deployment |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress-test requirements including HTOL, TCT, and ESD |
Pinout & Package
Package: SOD123 surface-mount plastic package with cathode band marking; dimensions: 1.55 mm × 2.65 mm × 1.05 mm (L × W × H); weight ≈ 0.01 g; UL 94V-0 rated molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection | Connected to ground or lower-potential node in shunt regulator configuration |
| Cathode | Zener breakdown terminal / high-side connection | Connected to input or regulated node; marked by visible band on package body |
Key Features
| Feature | Design Value |
|---|---|
| Tight Zener voltage tolerance | ±2.5% (7.29–7.67 V) - enables accurate voltage setting without post-production trimming |
| Low dynamic impedance | 6 Ω at 20 mA - minimizes output voltage shift under load transients |
| AEC-Q101 qualification | Validated for automotive use with PPAP support - meets reliability requirements for safety-critical ECUs |
| Halogen- and antimony-free | <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - complies with global environmental directives (RoHS 3) |
| SOD123 footprint | Standardized 2-pin outline compatible with high-speed pick-and-place and reflow processes |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Provides stable 7.5 V reference for analog-to-digital converter (ADC) biasing in engine knock detection circuitry. IC Role / Device Role / Timing Role: Shunt voltage reference maintaining constant bias point despite battery voltage fluctuations (9–16 V). Use Value: Enables <±0.5% ADC full-scale accuracy across −40 to +125 °C ambient range due to low TC and tight VZ tolerance. |
Use Scenario: Clamps amplifier input to prevent saturation during 4–20 mA loop surge events in pressure transducer front-end. IC Role / Device Role / Timing Role: Overvoltage protection element limiting input to 7.67 V peak, safeguarding op-amp inputs. Use Value: Prevents latch-up and input-stage damage while adding <0.5 µA leakage-no impact on loop accuracy. |
| DC-DC Converter Feedback Network | Medical Instrument Reference Divider |
Use Scenario: Sets output voltage of isolated flyback converter via optocoupler-coupled feedback path. IC Role / Device Role / Timing Role: Precision shunt reference replacing TL431 where smaller footprint and higher temp range are required. Use Value: Delivers 7.46 V reference with 6 Ω impedance, reducing feedback error contribution to <0.1% under 10 mA load variation. |
Use Scenario: Generates calibrated 3.73 V mid-rail for dual-supply instrumentation amplifier in portable ECG front-end. IC Role / Device Role / Timing Role: Paired with matched resistors to form precision voltage divider with traceable ratio stability. Use Value: Achieves ±0.6% total divider error (including VZ tolerance and resistor drift) over medical operating temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C7V5-Q | Same 7.5 V nominal, ±5% tolerance (7.13–7.88 V), 15 Ω ZZT, SOT-23 package | Larger footprint mismatch; higher impedance increases regulation error under load | Select when SOT-23 is already standardized and ±5% tolerance suffices |
| MMSZ5235B-TP | 7.5 V nominal, ±5% tolerance, 10 Ω ZZT, SOD-123 but non-automotive grade | No AEC-Q101 qualification; not PPAP-capable; unsuitable for Tier-1 automotive programs | Select only for industrial or consumer designs where automotive qualification is unnecessary |
Compared with BZX84-C7V5-Q and MMSZ5235B-TP, DDZ7V5CQ-7 offers tighter tolerance, lower impedance, and full automotive qualification-making it the sole choice for safety-critical, high-accuracy, and production-qualified vehicle systems.
Availability
DDZ7V5CQ-7 is available at Aetrix Electronics and suitable for automotive engine control units, industrial sensor signal conditioning, and DC-DC converter feedback networks requiring stable component supply, long-term lifecycle assurance, and AEC-Q101 compliance.
Supply support for DDZ7V5CQ-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 components for automotive, industrial, and computing markets.
The DDZ series targets precision voltage reference and clamping applications in harsh environments, with design emphasis on tight VZ tolerance, low ZZT, and robust automotive qualification.
FAQ
What is the maximum continuous power dissipation for DDZ7V5CQ-7 on a standard PCB?
At +25°C ambient, DDZ7V5CQ-7 dissipates up to 294 mW when mounted on an FR-4 board with minimal recommended pad layout (1× pad). This derates linearly to zero at +150°C ambient, per the Note 8 power curve in DS30407 Rev. 21-2.
Is DDZ7V5CQ-7 suitable for use in a 12 V automotive battery monitoring circuit?
Yes - its 7.29–7.67 V zener range provides safe clamping below typical 12 V system transients (e.g., load dump peaks ≤40 V), and its AEC-Q101 qualification ensures operation across −40 to +150°C junction temperature in under-hood environments.
How does the temperature coefficient affect regulation accuracy over temperature?
Per Figure 16–19 in DS30407, DDZ7V5CQ-7 exhibits a typical TC of +0.04 %/°C near 7.5 V. Over −40 to +125°C, this contributes ≈±6.6 mV/°C drift, resulting in <±1.1 V total VZ shift - well within its ±2.5% initial tolerance band.
Can DDZ7V5CQ-7 replace a TL431 in a feedback network?
It can serve as a passive shunt reference in simple feedback paths, but lacks the TL431's adjustable output, built-in error amplifier, and current sink capability. Use only where fixed 7.5 V reference and minimal external components are acceptable - not for programmable or high-gain compensation.
DDZ7V5CQ-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 7.5 V
- Tolerance:
- ±3%
- Power - Max:
- 470 mW
- Impedance (Max) (Zzt):
- 6 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 6 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
DDZ7V5CQ-7 FAQ
1.How can I place an order for DDZ7V5CQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ7V5CQ-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 DDZ7V5CQ-7 reliable?
The price and inventory of DDZ7V5CQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ7V5CQ-7 is usually 5 days.
3.What payment methods are accepted for DDZ7V5CQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ7V5CQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ7V5CQ-7?
DDZ7V5CQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ7V5CQ-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 DDZ7V5CQ-7?
For technical support, including DDZ7V5CQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ7V5CQ-7 requirements.
6.How does Aetrix verify that DDZ7V5CQ-7 is sourced from the original manufacturer or authorized distributors?
All DDZ7V5CQ-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 DDZ7V5CQ-7 meets industry standards.
7.What is the process for return or replacement of DDZ7V5CQ-7?
All DDZ7V5CQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ7V5CQ-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 DDZ7V5CQ-7 part is unused and in its original packaging.
Return procedure for DDZ7V5CQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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