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Diodes Incorporated DDZ22DS-7
- Part No.:
- DDZ22DS-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
DDZ22DS-7.pdf
- Description:
- DIODE ZENER 22V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:9,731
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Product details
Overview
DDZ22DS-7 from Diodes Incorporated is a surface-mount precision Zener diode in SOD323 package, rated for 21.52–22.63 V nominal Zener voltage at 5 mA test current, with 30 Ω maximum Zener impedance and 0.05 µA maximum reverse leakage at 17 V. It delivers tight voltage tolerance (±2.5%), low thermal resistance (625 °C/W), and is used for voltage regulation and reference in power supply feedback loops and analog sensor biasing circuits.
For engineers reviewing the DDZ22DS-7 datasheet, DDZ22DS-7 pinout, DDZ22DS-7 application, or DDZ22DS-7 equivalent, key selection criteria include Zener voltage accuracy, temperature coefficient (≈+0.07 %/°C), low leakage at rated VR, SOD323 footprint compatibility, and RoHS/Green compliance for high-reliability consumer and industrial PCBs.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown with sharp knee characteristics and minimal dynamic impedance. Its 5 mA Zener test current and 30 Ω impedance at that point ensure stable regulation under moderate load variations.
The SOD323 package enables automated placement and reflow soldering, while its 200 mW power rating and 625 °C/W junction-to-ambient thermal resistance require careful PCB copper area design to maintain operation within –65 °C to +150 °C ambient range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 21.52–22.63 V @ IZT = 5 mA - defines precise regulation threshold for feedback networks |
| Zener Impedance (ZZT) | 30 Ω max @ IZT = 5 mA - ensures minimal output voltage shift under load transients |
| Reverse Leakage (IR) | 0.05 µA max @ VR = 17 V - guarantees negligible error current in high-impedance reference paths |
| Power Dissipation (PD) | 200 mW - sets maximum continuous DC power handling on standard FR-4 board |
| Thermal Resistance (RθJA) | 625 °C/W - requires ≥25 mm² of 1-oz copper pad to sustain full power at 70 °C ambient |
| Temperature Coefficient | +0.07 %/°C (typ.) - enables predictable drift compensation in mid-voltage references |
Pinout & Package
Package: SOD323 - ultra-small plastic surface-mount case (1.30 × 1.70 × 0.95 mm), cathode-banded polarity, 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; forms return path during Zener conduction |
| Cathode | Reverse breakdown terminal / Regulated output node | Provides stable voltage referenced to anode; marked by band on package body |
Key Features
| Feature | Design Value |
|---|---|
| Very tight VZ tolerance | ±2.5% over 21.52–22.63 V range - reduces need for post-production trimming in voltage references |
| Low Zener impedance | 30 Ω max at 5 mA - maintains regulation stability across ±10% load current variation |
| Ultra-low leakage | 0.05 µA max at 17 V - preserves accuracy in high-impedance op-amp reference inputs |
| Lead-free & Green compliant | Halogen- and antimony-free, <900 ppm Br/Cl, <1000 ppm Sb - meets IPC-1752A Tier 1 reporting requirements |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Provides precise voltage reference for optocoupler-based feedback in isolated 24 V DC-DC converters. IC Role / Device Role / Timing Role: Zener diode acting as secondary-side voltage sensing element in TL431-less topology. Use Value: Enables ±1.5% output regulation without external trimming, leveraging 21.52–22.63 V tolerance and 30 Ω impedance. |
Use Scenario: Biases RTD or thermistor bridge in 4–20 mA transmitter front-end. IC Role / Device Role / Timing Role: Stable excitation reference for ratiometric analog signal chains. Use Value: 0.05 µA leakage prevents offset errors in microamp-level bridge currents. |
| Programmable Logic Controller Input Protection | Automotive Body Control Module Reference |
Use Scenario: Clamps transient overvoltage on 24 V digital input channels using series resistor + Zener. IC Role / Device Role / Timing Role: Precision shunt clamp limiting input to 22.63 V maximum. Use Value: Sharp breakdown and 200 mW rating allow reliable clamping of 100 ns ESD pulses per IEC 61000-4-2 Level 4. |
Use Scenario: Supplies regulated bias to LIN transceiver internal regulators in 12 V vehicle networks. IC Role / Device Role / Timing Role: Low-drift voltage reference for local LDO enable threshold. Use Value: +0.07 %/°C tempco ensures stable enable point across –40 °C to +125 °C underhood conditions. |
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 | 22.0–23.1 V range, 55 Ω ZZT, 100 mW PD, SOT-23 package | Larger footprint; higher impedance limits use in precision feedback | Prefer when existing SOT-23 layout prohibits SOD323 migration |
| MMSZ5246B-TP | 22.0–24.2 V range, 35 Ω ZZT, 500 mW PD, SOD-123 package | Higher power but looser tolerance (±5%) and larger thermal mass | Select for higher-power clamping where ±2.5% VZ is not required |
Compared with BZX84-C22LT1G and MMSZ5246B-TP, DDZ22DS-7 offers tighter voltage tolerance and lower impedance in the smallest footprint-making it optimal for space-constrained, high-accuracy regulation where thermal budget is managed via PCB layout.
Availability
DDZ22DS-7 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, PLC input protection, and automotive body control modules requiring stable component supply and consistent Zener voltage performance across production lots.
Supply support for DDZ22DS-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-efficiency power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
DDZ22DS-7 belongs to the DDZxxS precision Zener family, designed specifically for compact, high-stability voltage reference and regulation in automated SMT assembly environments where tight tolerance and low leakage are critical.
FAQ
What is the maximum continuous Zener current for DDZ22DS-7 at 70°C ambient?
At 70°C ambient, derating per Figure 1 reduces maximum power dissipation to 150 mW. With VZ ≈ 22.1 V, the maximum continuous Zener current is ~6.8 mA. Exceeding this risks thermal runaway due to the device's 625 °C/W RθJA and positive tempco above 6 V.
Does DDZ22DS-7 have a specified capacitance value?
No capacitance specification is provided in DS30414 Rev. 10–2. Figure 6 shows typical total capacitance decreasing with Zener voltage - for 22 V devices, measured values fall below 2 pF at 1 MHz and 2 V reverse bias, consistent with SOD323 geometry and junction design.
Can DDZ22DS-7 be used in place of a 22 V Zener with 5% tolerance?
Yes - its ±2.5% tolerance (21.52–22.63 V) is tighter than standard 5% Zeners. However, its 5 mA test current and 30 Ω impedance differ from legacy 20 mA/200 Ω parts; verify loop stability in feedback applications before substitution.
Is the SOD323 package compatible with standard reflow profiles?
Yes - the SOD323 package is qualified for lead-free reflow per J-STD-020, with moisture sensitivity level 1. Recommended peak temperature is 260°C for ≤10 seconds; ramp rates and soak times must follow IPC-J-STD-020 Class 1 guidelines to avoid delamination.
DDZ22DS-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):
- 22 V
- Tolerance:
- ±2.5%
- Power - Max:
- 200 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-323
DDZ22DS-7 FAQ
1.How can I place an order for DDZ22DS-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ22DS-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 DDZ22DS-7 reliable?
The price and inventory of DDZ22DS-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ22DS-7 is usually 5 days.
3.What payment methods are accepted for DDZ22DS-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ22DS-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ22DS-7?
DDZ22DS-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ22DS-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 DDZ22DS-7?
For technical support, including DDZ22DS-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ22DS-7 requirements.
6.How does Aetrix verify that DDZ22DS-7 is sourced from the original manufacturer or authorized distributors?
All DDZ22DS-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 DDZ22DS-7 meets industry standards.
7.What is the process for return or replacement of DDZ22DS-7?
All DDZ22DS-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ22DS-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 DDZ22DS-7 part is unused and in its original packaging.
Return procedure for DDZ22DS-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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