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Microchip Technology CDLL4616
- Part No.:
- CDLL4616
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
CDLL4616.pdf
- Description:
- DIODE ZENER 2.2V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,856
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Product details
Overview
CDLL4616 from Microsemi is a hermetically sealed, glass-encapsulated 2.2 V Zener diode in DO-213AA (MELF/LL34) package, rated for 250 µA test current, 1300 Ω maximum zener impedance at IZT, 4.0 µA maximum reverse leakage at 1 V, and 100 mW DC power dissipation at TEC = +125°C. It operates across –65°C to +175°C and is used for precision voltage reference and low-current biasing in aerospace sensor signal conditioning.
For engineers reviewing the CDLL4616 datasheet, CDLL4616 pinout, CDLL4616 application, or CDLL4616 equivalent, key selection criteria include its ±5% zener voltage tolerance, thermal resistance of 100 °C/W (L = 0 inch), axial CTE match requirement (+6 ppm/°C), hermetic MELF construction, and 250 µA low-current operation capability.
Technical Context
The CDLL4616 functions as a low-power, high-stability voltage reference diode with metallurgically bonded junctions and glass-sealed DO-213AA packaging. Its 2.2 V nominal zener voltage is specified at 250 µA test current, with 1300 Ω dynamic impedance measured using 10% AC superimposition on IZT.
Designed for extreme-temperature environments, it supports end-cap temperature operation from –65°C to +175°C and requires mounting surface CTE matching (~+6 ppm/°C) to minimize thermomechanical stress. Power derating begins at +125°C at 10 mW/°C, limiting max dissipation to 500 mW at TEC = +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 2.2 V ±5% at IZT = 250 µA - defines stable reference point for low-current bias networks |
| Zener Impedance | 1300 Ω max at IZT = 250 µA - indicates voltage regulation stiffness under small-signal variation |
| Reverse Leakage Current | 4.0 µA max at VR = 1 V - ensures minimal error current in high-impedance reference paths |
| Power Dissipation | 500 mW @ TEC = +125°C - sets absolute thermal limit before derating applies |
| Operating Temperature | –65°C to +175°C - enables deployment in military, downhole, and avionics systems without derating |
| Thermal Resistance | 100 °C/W max (L = 0 inch) - determines junction-to-end-cap temperature rise under steady-state bias |
Pinout & Package
Package: DO-213AA (MELF/LL34), hermetically sealed glass case with tin/lead lead finish. Axial device with cathode band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential node in reverse-biased zener configuration |
| Cathode (banded end) | Current exit terminal; zener breakdown occurs here | Must be held at higher potential than anode to maintain regulated reverse bias |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass sealing | Prevents moisture ingress and long-term parameter drift in harsh environments |
| Metallurgically bonded junction | Ensures mechanical robustness and stable electrical characteristics over thermal cycling |
| Low 250 µA test current | Enables use in ultra-low-power reference circuits where supply current is constrained |
| +6 ppm/°C axial CTE | Guides PCB substrate selection to avoid solder joint fatigue under thermal cycling |
Applications
| Aerospace Sensor Biasing | Downhole Instrumentation Reference |
|---|---|
Use Scenario: Providing stable excitation voltage to piezoresistive pressure transducers in flight control systems. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to deliver fixed 2.2 V reference independent of supply ripple. Use Value: Maintains <±0.11 V regulation over –55°C to +125°C ambient, enabling sub-0.5% full-scale error in analog signal chains. | Use Scenario: Setting reference voltage for analog front-end amplifiers in oil-well logging tools exposed to 175°C wellbore temperatures. IC Role / Device Role / Timing Role: Low-current zener reference maintaining accuracy where active regulators fail due to thermal limits. Use Value: Delivers verified 2.2 V ±5% stability at 250 µA up to +175°C end-cap temperature per MIL-PRF-19500/435. |
| Avionics Power Monitor Calibration | Military Radio Frequency Reference |
Use Scenario: Calibrating ADC input range in aircraft battery health monitoring units with wide thermal swing. IC Role / Device Role / Timing Role: Precision voltage clamp establishing known threshold for overvoltage detection logic. Use Value: 4.0 µA leakage at 1 V ensures negligible loading on high-Z divider networks feeding comparator inputs. | Use Scenario: Generating local bias for RF detector diodes in secure tactical radios operating across –65°C to +85°C. IC Role / Device Role / Timing Role: Low-noise, low-drift DC reference stabilizing detector operating point under vibration and thermal shock. Use Value: Hermetic MELF construction prevents parameter shift after 1000+ thermal cycles between –65°C and +85°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4616UR-1 | Same 2.2 V nominal zener voltage, but qualified to JAN/JANTXV levels per MIL-PRF-19500/435; identical DO-213AA package and electrical specs | Required for defense procurement with full military screening and traceability | Select when compliance with MIL-PRF-19500/435 Class V screening is mandatory |
| BZX84-C2V2 | SOT-23 package, ±5% tolerance, 150 Ω zener impedance at 5 mA - significantly lower impedance but higher test current and plastic encapsulation | Suitable for commercial-grade portable electronics where size and cost outweigh hermeticity needs | Choose only if board space is constrained and extended temperature operation is not required |
Compared with CDLL4616, 1N4616UR-1 offers identical performance with military qualification, while BZX84-C2V2 trades hermetic reliability and extreme-temperature capability for smaller footprint and lower impedance at higher current - making CDLL4616 the sole choice for high-reliability, high-temperature analog references.
Availability
CDLL4616 is available at Aetrix Electronics and suitable for aerospace sensor biasing, downhole instrumentation reference, and avionics power monitor calibration requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for CDLL4616 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
Microsemi (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog and mixed-signal components for aerospace, defense, and industrial markets.
The CDLL4614–CDLL4627 series was developed to meet MIL-PRF-19500/435 requirements for hermetic, high-temperature-stable Zener references in mission-critical analog subsystems.
FAQ
What is the zener voltage tolerance for CDLL4616?
The CDLL4616 has a nominal zener voltage of 2.2 V with a tolerance of ±5%, as defined in Note 1 of the manufacturer's specification sheet. This tolerance applies at 25°C ambient with the device junction in thermal equilibrium. The "C" and "D" suffix variants offer tighter tolerances (+2% and +1%, respectively), but CDLL4616 itself is the base ±5% version.
Can CDLL4616 be used at +175°C junction temperature?
No - CDLL4616 is rated for end-cap temperature (TEC) up to +175°C, not junction temperature. Its maximum operating temperature specification refers to the end-cap measurement point. Junction temperature must remain below absolute maximum ratings, and thermal design must account for 100 °C/W thermal resistance and actual power dissipation to avoid exceeding safe limits.
Is CDLL4616 RoHS compliant?
CDLL4616 uses tin/lead lead finish and is not RoHS compliant. Its lead finish is specified explicitly in the design data as "Tin / Lead", and the device falls under legacy high-reliability product lines exempt from RoHS under applicable exemptions for aerospace and defense applications requiring Pb-based solder compatibility and proven long-term reliability.
What does the "CDLL" prefix indicate in CDLL4616?
The "CDLL" prefix identifies Microsemi's commercial-grade, hermetically sealed MELF Zener diode family meeting MIL-PRF-19500/435 requirements. It distinguishes these devices from the "1N46xxUR-1" military-qualified versions, sharing identical electrical specs and DO-213AA packaging but differing in screening level and documentation traceability.
How is zener impedance measured for CDLL4616?
Zener impedance for CDLL4616 is measured per Note 2: a 60 Hz RMS AC current equal to 10% of the DC test current (25 µA) is superimposed on IZT = 250 µA, and the resulting AC voltage change divided by the AC current yields 1300 Ω maximum. This method reflects small-signal dynamic impedance relevant to noise-sensitive reference applications.
CDLL4616 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 2.2 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 1300 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AA
CDLL4616 FAQ
1.How can I place an order for CDLL4616 through Aetrix?
Please submit a Request for Quotation (RFQ) for CDLL4616 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 CDLL4616 reliable?
The price and inventory of CDLL4616 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CDLL4616 is usually 5 days.
3.What payment methods are accepted for CDLL4616?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CDLL4616 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CDLL4616?
CDLL4616 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CDLL4616 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 CDLL4616?
For technical support, including CDLL4616 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CDLL4616 requirements.
6.How does Aetrix verify that CDLL4616 is sourced from the original manufacturer or authorized distributors?
All CDLL4616 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 CDLL4616 meets industry standards.
7.What is the process for return or replacement of CDLL4616?
All CDLL4616 units undergo pre-shipment inspection (PSI). If there is an issue with CDLL4616, 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 CDLL4616 part is unused and in its original packaging.
Return procedure for CDLL4616:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CDLL4616 Tags
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