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Microchip Technology CDLL823/TR
- Part No.:
- CDLL823/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
CDLL823/TR.pdf
- Description:
- DIODE ZENER 6.2V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,792
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Product details
Overview
CDLL823/TR from Central Semiconductor (CDI) is a temperature-compensated, hermetically sealed MELF (DO-213AA) Zener diode with nominal zener voltage 5.9–6.5 V, 7.5 mA test current, 48 Ω zener impedance, ±0.005 %/°C temperature coefficient, and 500 mW power rating at +50°C - used for precision voltage reference in industrial power supply feedback loops.
For engineers reviewing the CDLL823/TR datasheet, CDLL823/TR pinout, CDLL823/TR application, or CDLL823/TR equivalent, key selection criteria include zener voltage tolerance, low dynamic impedance at 7.5 mA, ultra-low temperature coefficient, high-temperature operation up to +175°C, and DO-213AA surface-mount compatibility.
Technical Context
The CDLL823/TR employs metallurgically bonded, double-plug construction to achieve stable zener voltage across -65°C to +175°C ambient range. Its 48 Ω zener impedance at 7.5 mA ensures minimal output variation under load transients in closed-loop regulation circuits.
Temperature compensation is achieved via internal junction design yielding ±0.005 %/°C coefficient - verified per JEDEC Std No.5 - enabling stable reference performance without external circuitry in high-reliability analog monitoring systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.9–6.5 V @ IZT = 7.5 mA - defines regulated output range for feedback sensing |
| Zener Impedance (ZZT) | 48 Ω @ 7.5 mA - limits AC ripple coupling into reference node |
| Temp. Coefficient (αVZ) | ±0.005 %/°C - enables <±0.5 mV drift over -55°C to +100°C operating range |
| Power Dissipation | 500 mW @ +50°C - supports continuous operation in compact thermal environments |
| Operating Temp. | -65°C to +175°C - qualified for downhole, aerospace, and engine-control applications |
| Reverse Leakage | 2 µA @ 3 VR, 25°C - ensures negligible error current in high-impedance bias networks |
Pinout & Package
Package: DO-213AA (MELF, SOD-80, LL34), hermetically sealed glass case; axial lead finish: tin/lead; polarity: cathode band denotes positive terminal during reverse-bias operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to system ground or error amplifier inverter input for stable bias |
| Cathode | Zener breakdown terminal / regulated voltage output | Provides precise 5.9–6.5 V reference to op-amp non-inverting input or controller feedback pin |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic DO-213AA package | Eliminates moisture-induced parameter shift in humid or high-reliability environments |
| Double-plug metallurgical construction | Ensures long-term zener voltage stability under thermal cycling stress |
| Ultra-low tempco (±0.005 %/°C) | Reduces need for external temperature compensation circuitry in precision references |
| High-temperature rating (+175°C) | Enables direct placement near power stages in motor drives and inverters |
Applications
| Industrial Power Supply Feedback | Aerospace Voltage Reference |
|---|---|
Use Scenario: Regulating output of isolated DC-DC converters in programmable logic controllers. IC Role / Device Role / Timing Role: Zener diode provides stable 6.2 V reference to TL431 error amplifier feedback network. Use Value: 48 Ω impedance minimizes loop gain variation across line/load transients. | Use Scenario: Providing primary voltage reference in satellite power management units. IC Role / Device Role / Timing Role: CDLL823/TR serves as secondary reference for ADC calibration against primary bandgap source. Use Value: ±0.005 %/°C tempco ensures <±1 LSB error over orbital thermal cycles. |
| Downhole Sensor Signal Conditioning | Automotive Engine Control Unit (ECU) |
Use Scenario: Biasing instrumentation amplifiers in oil-well pressure transducers exposed to >150°C ambient. IC Role / Device Role / Timing Role: CDLL823/TR establishes fixed reference for ratiometric sensor excitation. Use Value: +175°C max operating temperature allows direct PCB mounting without heat sinking. | Use Scenario: Stabilizing microcontroller reset threshold in under-hood ECU modules. IC Role / Device Role / Timing Role: Zener clamps VREF rail to prevent brownout mis-triggering during cranking events. Use Value: 2 µA leakage at 3 V ensures no loading on weak pull-up networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CDLL823A/TR | Zener impedance reduced to 10 Ω (vs. 48 Ω); same voltage range and tempco | Better suited for ultra-low-noise LDO feedback where dynamic impedance dominates error | Select CDLL823A/TR only when sub-15 Ω ZZT is required and cost premium is acceptable |
| 1N823UR-1 | MIL-PRF-19500/159 qualified; identical electrical specs but with JAN/JANTXV screening levels | Required for defense/aerospace programs mandating military-grade traceability and burn-in | Choose 1N823UR-1 when compliance with MIL-STD-883 testing and lot traceability is mandatory |
Compared with CDLL823/TR, CDLL823A/TR delivers lower dynamic impedance for noise-sensitive regulation, while 1N823UR-1 adds military qualification without altering core electrical behavior - enabling trade-offs between cost, noise, and certification requirements.
Availability
CDLL823/TR is available at Aetrix Electronics and suitable for industrial power supplies, aerospace voltage references, and downhole sensor conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CDLL823/TR 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
Central Semiconductor (CDI) designs and manufactures discrete semiconductors including Zener, Schottky, and switching diodes for high-reliability applications.
The CDLL82x series targets precision voltage reference needs in harsh-environment systems - emphasizing hermetic packaging, wide temperature operation, and tight parametric stability.
FAQ
What is the zener voltage tolerance of CDLL823/TR?
The CDLL823/TR has a specified zener voltage range of 5.9 V to 6.5 V at 7.5 mA test current. This ±5% tolerance reflects manufacturing spread under JEDEC-standard test conditions and is verified per batch during production screening. The CDLL823/TR's actual measured VZ falls within this window and is not individually binned.
Does CDLL823/TR require heatsinking in standard PCB layouts?
No, CDLL823/TR does not require external heatsinking when operated ≤500 mW at ambient ≤+50°C. Its DO-213AA glass package provides sufficient thermal conduction through axial leads. Derating begins at +50°C (4 mW/°C), so at +100°C ambient, max dissipation drops to 300 mW - still adequate for typical 7.5 mA bias applications. The CDLL823/TR's +175°C rating supports direct mounting near hot components.
How does the temperature coefficient of CDLL823/TR compare to standard Zeners?
The CDLL823/TR features ±0.005 %/°C temperature coefficient - over 10× tighter than typical 5.6 V Zeners (±0.05 %/°C). This is achieved via proprietary double-plug junction design and verified per JEDEC Std No.5. In practice, CDLL823/TR exhibits <±0.3 mV drift from -55°C to +100°C, whereas standard Zeners may drift >±3 mV over the same range. This makes CDLL823/TR suitable where CDLL823/TR replaces higher-cost compensated modules.
Is CDLL823/TR compatible with reflow soldering processes?
Yes, CDLL823/TR is rated for standard Pb-free reflow profiles (JEDEC J-STD-020) due to its hermetically sealed DO-213AA glass package and tin/lead lead finish. Peak temperature exposure up to 260°C for ≤10 seconds is permitted. Thermal shock resistance is enhanced by matched COE (~6 ppm/°C) with common FR4 and ceramic substrates. Always verify profile compatibility using CDLL823/TR's published thermal data before high-volume assembly.
Can CDLL823/TR be used in place of CDLL825/TR in a design?
No - CDLL823/TR and CDLL825/TR are not interchangeable. CDLL825/TR has 19 Ω zener impedance and ±0.002 %/°C tempco, versus CDLL823/TR's 48 Ω and ±0.005 %/°C. Substituting CDLL823/TR for CDLL825/TR increases reference noise and thermal drift by ~2.5×. The CDLL823/TR remains valid only where its specific 48 Ω/±0.005 %/°C performance meets the original design margin.
CDLL823/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 6.2 V
- Tolerance:
- ±4.83%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 3 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AA
CDLL823/TR FAQ
1.How can I place an order for CDLL823/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for CDLL823/TR 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 CDLL823/TR reliable?
The price and inventory of CDLL823/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CDLL823/TR is usually 5 days.
3.What payment methods are accepted for CDLL823/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CDLL823/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CDLL823/TR?
CDLL823/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CDLL823/TR 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 CDLL823/TR?
For technical support, including CDLL823/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CDLL823/TR requirements.
6.How does Aetrix verify that CDLL823/TR is sourced from the original manufacturer or authorized distributors?
All CDLL823/TR 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 CDLL823/TR meets industry standards.
7.What is the process for return or replacement of CDLL823/TR?
All CDLL823/TR units undergo pre-shipment inspection (PSI). If there is an issue with CDLL823/TR, 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 CDLL823/TR part is unused and in its original packaging.
Return procedure for CDLL823/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CDLL823/TR Tags
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