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Diodes Incorporated DDZ22D-7
- Part No.:
- DDZ22D-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
DDZ22D-7.pdf
- Description:
- DIODE ZENER 22V 470MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
DDZ22D-7 from Diodes Incorporated is a surface-mount precision Zener diode with a nominal zener voltage of 22.05 V (min 21.52 V, max 22.63 V), 5 mA test current, 30 Ω zener impedance at 1 kHz, 0.05 µA maximum reverse leakage at 17 V, and ±5% voltage tolerance. It operates as a voltage reference or overvoltage clamp in low-power analog circuits, power supply feedback loops, and sensor signal conditioning stages.
For engineers reviewing the DDZ22D-7 datasheet, DDZ22D-7 pinout, DDZ22D-7 application, or DDZ22D-7 equivalent, key selection criteria include zener voltage tightness (±2.5% typical), thermal resistance (425 °C/W on minimal pad), SOD123 package compatibility, and automotive-grade alternatives for AEC-Q101-compliant designs.
Technical Context
This device functions as a two-terminal, silicon-based voltage reference diode operating in reverse breakdown mode. Its zener voltage is stabilized by controlled avalanche multiplication above ~6 V, confirmed by its positive temperature coefficient (+0.08 %/°C at 22 V) and 30 Ω dynamic impedance at 5 mA.
The SOD123 package enables automated placement and reflow soldering, with cathode band marking for polarity identification. Thermal performance is defined under two mounting conditions: 425 °C/W on minimal PCB pad (Note 8) and 266 °C/W on 1 in² copper area (Note 7), directly impacting power derating in compact layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 21.52–22.63 V at IZT = 5 mA - defines stable reference point for regulation within ±2.5% tolerance |
| Zener Impedance (ZZT) | 30 Ω at f = 1 kHz - determines output voltage variation under load transients |
| Reverse Leakage (IR) | 0.05 µA at VR = 17 V - ensures minimal error current in high-impedance reference nodes |
| Power Dissipation (PD) | 294 mW at TA = +25°C on minimal pad - sets absolute max continuous power before thermal runaway |
| Thermal Resistance (RθJA) | 425 °C/W - requires careful PCB copper planning to maintain junction below 150°C at rated power |
| Operating Temperature | −65 to +150 °C - supports industrial and automotive under-hood environments |
| Package | SOD123 - 2.65 mm × 1.55 mm footprint with cathode band marking and matte tin terminals |
Pinout & Package
SOD123 is a two-terminal surface-mount package with cathode identified by a visible band on the body. Terminals are matte tin annealed over Alloy 42 leadframe, fully RoHS and halogen-free compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to circuit common; forms low-impedance return path during forward bias or clamping |
| Cathode | Zener breakdown terminal / Voltage reference output | Provides regulated voltage relative to anode; marked with band; connects to feedback or sense node |
Key Features
| Feature | Design Value |
|---|---|
| Precision voltage regulation | ±2.5% typical VZ tolerance at 5 mA enables accurate 22 V reference without trimming |
| Low dynamic impedance | 30 Ω at 1 kHz minimizes output voltage shift under varying load currents in feedback paths |
| Ultra-low leakage | 0.05 µA at 17 V prevents loading errors in high-resistance divider networks and sensor interfaces |
| Automated assembly ready | SOD123 package with J-STD-020 Level 1 moisture sensitivity supports standard reflow profiles |
| Green and RoHS-compliant | Halogen- and antimony-free molding compound (<900 ppm Br+Cl, <1000 ppm Sb) meets automotive environmental requirements |
Applications
| Industrial Power Supply Feedback | Automotive Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Regulating output voltage in isolated flyback converters using optocoupler feedback. IC Role / Device Role / Timing Role: Zener diode provides precise 22 V reference to TL431 shunt regulator input. Use Value: Tight 22.05 V tolerance maintains ±1% output regulation across line/load/temperature variations. |
Use Scenario: Biasing and clamping analog outputs from pressure or temperature sensors in engine control units. IC Role / Device Role / Timing Role: Clamps sensor output to 22 V to protect downstream ADC inputs from transients. Use Value: 0.05 µA leakage avoids offset drift in 1 MΩ sensor bridge configurations. |
| Test Equipment Voltage Reference | IoT Node Battery Monitoring |
|
Use Scenario: Providing stable reference for digital multimeter front-end scaling circuits. IC Role / Device Role / Timing Role: Precision 22 V reference sets full-scale range for 24-bit sigma-delta ADCs. Use Value: 30 Ω zener impedance ensures <10 ppm voltage shift during 10 µA measurement current changes. |
Use Scenario: Monitoring Li-ion battery pack voltage in smart home gateways with 24 V nominal systems. IC Role / Device Role / Timing Role: Zener clamps microcontroller ADC input to prevent overvoltage during surge events. Use Value: −65 to +150 °C operating range supports reliable operation in unregulated enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C22LT1G | 22 V nominal, ±5% tolerance, 55 Ω ZZT, SOT-23 package | Higher impedance and looser tolerance reduce accuracy in precision references | Select when board space allows SOT-23 and ±5% regulation suffices |
| DDZ22DQ-7 | Identical electrical specs, AEC-Q101 qualified, IATF16949 manufactured | Required for automotive production with PPAP documentation and change control | Select for automotive ECUs where qualification and traceability are mandatory |
Compared with DDZ22D-7, BZX84-C22LT1G trades accuracy for smaller size and broader availability, while DDZ22DQ-7 adds automotive qualification without altering electrical behavior-making it ideal for Tier 1 supply chains needing documented compliance.
Availability
DDZ22D-7 is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor modules, test equipment voltage references, and IoT battery monitoring systems requiring stable component supply and consistent parametric performance across production lots.
Supply support for DDZ22D-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 precision voltage reference and protection applications in cost-sensitive, high-volume industrial and automotive systems, emphasizing tight VZ tolerance, low leakage, and robust packaging for automated assembly.
FAQ
What is the maximum power dissipation of DDZ22D-7 at room temperature?
DDZ22D-7 has a maximum power dissipation of 294 mW at TA = +25°C when mounted on a minimal recommended SOD123 pad layout (per Note 8). This derates linearly to zero at +150°C ambient, requiring thermal design consideration for sustained operation above 100 mW.
How is polarity identified on the DDZ22D-7 package?
Polarity is indicated by a cathode band printed on the body of the SOD123 package. The banded end is the cathode terminal, which must be connected to the higher-potential side of the circuit to enable reverse-bias zener operation. The unmarked end is the anode.
Does DDZ22D-7 meet automotive qualification standards?
No-DDZ22D-7 is the commercial-grade variant. The automotive-qualified version is DDZ22DQ-7, which is AEC-Q101 certified, PPAP capable, and manufactured in IATF16949-certified facilities. Electrical specifications are identical between the two part numbers.
What is the temperature coefficient of DDZ22D-7's zener voltage?
DDZ22D-7 exhibits a positive temperature coefficient of approximately +0.08 %/°C near 22 V, as shown in Figure 18 of DS30407 Rev. 21–2. This means VZ increases by ~17.6 mV per °C rise in junction temperature, critical for high-stability reference designs.
DDZ22D-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):
- 22 V
- Tolerance:
- ±3%
- Power - Max:
- 470 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 17 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
DDZ22D-7 FAQ
1.How can I place an order for DDZ22D-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ22D-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 DDZ22D-7 reliable?
The price and inventory of DDZ22D-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ22D-7 is usually 5 days.
3.What payment methods are accepted for DDZ22D-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ22D-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ22D-7?
DDZ22D-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ22D-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 DDZ22D-7?
For technical support, including DDZ22D-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ22D-7 requirements.
6.How does Aetrix verify that DDZ22D-7 is sourced from the original manufacturer or authorized distributors?
All DDZ22D-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 DDZ22D-7 meets industry standards.
7.What is the process for return or replacement of DDZ22D-7?
All DDZ22D-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ22D-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 DDZ22D-7 part is unused and in its original packaging.
Return procedure for DDZ22D-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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