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Microchip Technology CDLL827A/TR
- Part No.:
- CDLL827A/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
CDLL827A/TR.pdf
- Description:
- DIODE ZENER 6.2V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,291
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Product details
Overview
CDLL827A/TR from Central Semiconductor (CDI) is a temperature-compensated, hermetically sealed MELF glass zener diode with nominal zener voltage 5.9–6.5 V, 10 Ω zener impedance at 7.5 mA test current, and ±0.001 %/°C temperature coefficient over –55°C to +100°C. It delivers precision voltage reference in low-power analog monitoring circuits.
For engineers reviewing the CDLL827A/TR datasheet, CDLL827A/TR pinout, CDLL827A/TR application, or CDLL827A/TR equivalent, key selection criteria include its ultra-low tempco, tight VZ tolerance, DO-213AA package suitability for high-reliability surface-mount layouts, and 500 mW power rating at +50°C.
Technical Context
This device uses metallurgically bonded, double-plug construction to achieve stable zener voltage under thermal cycling. Its temperature coefficient is specified as ±0.001 %/°C across –55°C to +100°C per JEDEC Std. 5, verified by maximum observed ∆VZT of ±0.001 mV over the full range.
The CDLL827A/TR operates with cathode-banded polarity and exhibits 2 µA reverse leakage at 3 VR, supporting low-current biasing in precision reference chains. Its DO-213AA (SOD-80/LL34) glass MELF package enables axial mounting on thermally matched substrates with COE ~6 ppm/°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.9–6.5 V @ IZT = 7.5 mA - defines stable regulation window for reference design |
| Zener Impedance (ZZT) | 9 Ω @ IZT = 7.5 mA - ensures minimal output voltage shift under load transients |
| Temperature Coefficient | ±0.001 %/°C - enables <±0.1 mV drift over –55°C to +100°C in critical references |
| Power Dissipation | 500 mW @ +50°C - supports continuous operation in compact industrial PCBs |
| Reverse Leakage (IR) | 2 µA @ VR = 3 V - allows use in ultra-low-quiescent-current bias networks |
| Operating Temp Range | –65°C to +175°C - qualified for aerospace and downhole instrumentation |
Pinout & Package
DO-213AA (MELF, SOD-80, LL34) hermetically sealed glass package with axial leads; tin/lead plating; cathode identified by band. Mounting position unrestricted; substrate COE matching recommended.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink during reverse breakdown | Connected to system ground or lower-potential node in shunt regulator |
| Cathode (banded) | Current source during reverse breakdown | Provides regulated output voltage; must be biased positive relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low temperature coefficient | ±0.001 %/°C enables sub-millivolt stability in wide-temperature environments |
| Hermetic glass MELF construction | DO-213AA package resists moisture ingress and ensures long-term parametric reliability |
| Double-plug metallurgical bonding | Minimizes interfacial stress and improves thermal cycling endurance beyond MIL-PRF-19500 |
| Low zener impedance | 9 Ω at 7.5 mA supports fast transient response in feedback loops and reference buffers |
Applications
| High-Stability Reference Source | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Precision voltage reference for 24-bit delta-sigma ADCs in calibration-grade data loggers. IC Role / Device Role / Timing Role: Shunt zener providing stable 6.2 V reference to REF+ input of ADS1256. Use Value: ±0.001 %/°C tempco limits reference drift to <±0.062 mV over –40°C to +85°C ambient. | Use Scenario: Biasing network for bridge-based pressure transducers in factory automation PLC modules. IC Role / Device Role / Timing Role: Zener clamping and excitation voltage stabilization for Wheatstone bridge supply rail. Use Value: 9 Ω ZZT maintains <±1.5 mV ripple under 100 µA bridge current variation. |
| Aerospace Power Monitor Calibration | Downhole Oilfield Instrumentation |
Use Scenario: Reference element in radiation-tolerant DC-DC converter feedback dividers for satellite EPS. IC Role / Device Role / Timing Role: Temperature-stable shunt regulator defining output voltage setpoint in isolated flyback controller. Use Value: Hermetic DO-213AA package and –65°C to +175°C rating support qualification per MIL-PRF-19500/159. | Use Scenario: Voltage clamp in high-temp telemetry front-ends deployed at 175°C wellbore environments. IC Role / Device Role / Timing Role: Overvoltage protection and bias stabilization for SiC gate drivers and analog front-ends. Use Value: Stable 6.2 V regulation maintained with <±0.001 mV ∆VZT across full operational temperature sweep. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N827UR-1 | MIL-PRF-19500/159 qualified (JAN/JANTXV); identical VZ, ZZT, and tempco; same DO-213AA package | Required for defense/aerospace programs mandating MIL-spec traceability and screening | Select 1N827UR-1 when compliance with military procurement standards is mandatory |
| CDLL827 | ZZT = 15 Ω (vs. 10 Ω for CDLL827A/TR); otherwise identical VZ, tempco, and packaging | Suitable where slightly higher dynamic impedance is acceptable to reduce cost in non-critical references | Choose CDLL827 for cost-sensitive industrial designs where 15 Ω ZZT meets system error budget |
Compared with CDLL827A/TR, the 1N827UR-1 adds MIL-spec traceability without electrical trade-offs, while CDLL827 trades 5 Ω higher zener impedance for lower unit cost-both retain the same thermal stability and package fit.
Availability
CDLL827A/TR is available at Aetrix Electronics and suitable for high-reliability voltage reference, sensor signal conditioning, and aerospace power monitor applications requiring stable component supply across extended temperature ranges.
Supply support for CDLL827A/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 Corp. (CDI) is a U.S.-based manufacturer specializing in discrete semiconductors, including zener, switching, and RF diodes, with emphasis on high-reliability and MIL-qualified products.
The CDLL82x series was designed for precision voltage reference applications demanding ultra-low temperature coefficients, hermetic packaging, and operation across extreme industrial and aerospace temperature ranges.
FAQ
What is the nominal zener voltage range of the CDLL827A/TR?
The CDLL827A/TR has a nominal zener voltage range of 5.9 V to 6.5 V, measured at a test current of 7.5 mA. This range reflects manufacturing tolerance and ensures compatibility with 6.2 V reference designs. The CDLL827A/TR achieves this specification using double-plug metallurgical construction and is rated per JEDEC Standard No. 5 for temperature stability.
What package type does the CDLL827A/TR use, and what are its key mechanical features?
The CDLL827A/TR uses the DO-213AA (MELF/SOD-80/LL34) hermetically sealed glass package with axial leads and tin/lead plating. Its dimensions are D: 1.60–1.70 mm, G: 3.30–3.70 mm, and F: 0.41–0.55 mm. The CDLL827A/TR's axial coefficient of expansion (~6 ppm/°C) requires matching to substrate COE for thermal reliability.
How does the temperature coefficient of the CDLL827A/TR compare to standard zener diodes?
The CDLL827A/TR has a temperature coefficient of ±0.001 %/°C over –55°C to +100°C, significantly tighter than typical zeners (often ±0.05 %/°C). This is achieved via temperature-compensated double-plug construction. The CDLL827A/TR's ∆VZT remains within ±0.001 mV across the full range, per JEDEC Std. 5.
What is the maximum power dissipation rating for the CDLL827A/TR, and how does it derate with temperature?
The CDLL827A/TR is rated for 500 mW at +50°C ambient, with linear derating of 4 mW/°C above that temperature. At +125°C, its usable power drops to 200 mW. This derating curve is validated in Figure 2 of the official CDI datasheet, ensuring safe operation in high-density industrial PCBs where the CDLL827A/TR serves as a precision reference.
Is the CDLL827A/TR suitable for aerospace applications requiring MIL-spec qualification?
The CDLL827A/TR itself is not MIL-qualified, but its direct counterpart 1N827UR-1 is fully compliant with MIL-PRF-19500/159 (JAN/JANTXV/JANS). Both share identical electrical specs and DO-213AA packaging. For aerospace programs requiring traceability and screening, specify 1N827UR-1; the CDLL827A/TR remains ideal for commercial high-reliability applications where MIL-spec is not mandated.
CDLL827A/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):
- 10 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
CDLL827A/TR FAQ
1.How can I place an order for CDLL827A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for CDLL827A/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 CDLL827A/TR reliable?
The price and inventory of CDLL827A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CDLL827A/TR is usually 5 days.
3.What payment methods are accepted for CDLL827A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CDLL827A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CDLL827A/TR?
CDLL827A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CDLL827A/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 CDLL827A/TR?
For technical support, including CDLL827A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CDLL827A/TR requirements.
6.How does Aetrix verify that CDLL827A/TR is sourced from the original manufacturer or authorized distributors?
All CDLL827A/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 CDLL827A/TR meets industry standards.
7.What is the process for return or replacement of CDLL827A/TR?
All CDLL827A/TR units undergo pre-shipment inspection (PSI). If there is an issue with CDLL827A/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 CDLL827A/TR part is unused and in its original packaging.
Return procedure for CDLL827A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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