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Microchip Technology 1N4573AUR-1/TR
- Part No.:
- 1N4573AUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N4573AUR-1/TR.pdf
- Description:
- DIODE ZENER 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,447
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Product details
Overview
1N4573AUR-1/TR from Microsemi is a temperature-compensated zener reference diode in DO-213AA (MELF) glass package, rated for 1.0 mA test current, ±0.001 %/°C temperature coefficient, 10 mV voltage stability over −55°C to +100°C, and 100 Ω dynamic impedance - used in precision voltage references for aerospace instrumentation and calibration equipment.
For engineers reviewing the 1N4573AUR-1/TR datasheet, 1N4573AUR-1/TR pinout, 1N4573AUR-1/TR application, or 1N4573AUR-1/TR equivalent, key selection criteria include low TC (±0.001 %/°C), hermetic MELF packaging, −55°C to +100°C operational range, 10 mV max voltage drift, and compatibility with low-current (1.0 mA) biasing in high-stability analog circuits.
Technical Context
This device belongs to Microsemi's CDLL4565–CDLL4584A family of metallurgically bonded, double-plug zener diodes engineered for ultra-low temperature coefficient and tight voltage stability. It operates at 1.0 mA test current with a nominal zener voltage not explicitly listed in the provided data but falls within the CDLL4573A row (1.0 mA, ±0.001 %/°C, 10 mV stability, −55°C to +100°C range, 100 Ω ZZT).
The DO-213AA hermetically sealed glass package ensures long-term parameter stability under thermal cycling and humidity exposure. Its axial coefficient of expansion (+6 ppm/°C) requires matching to substrate materials to minimize mechanical stress-induced voltage shift during temperature transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Test Current | 1.0 mA - sets operating point for specified TC and impedance; enables low-power biasing in battery-backed references. |
| Temp. Coefficient | ±0.001 %/°C - ensures sub-10 ppm/°C voltage drift; critical for metrology-grade calibration sources. |
| Voltage Stability | 10 mV max over −55°C to +100°C - guarantees bounded error without trimming across full military temp range. |
| Zener Impedance | 100 Ω - limits AC ripple coupling into reference node; supports stable operation with minimal bypass capacitance. |
| Package | DO-213AA (MELF) - hermetic glass construction prevents moisture ingress and parameter drift over decades. |
| Max Power Dissip. | 500 mW @ +50°C - allows operation up to 175°C junction with derating; suitable for high-reliability embedded systems. |
Pinout & Package
DO-213AA (MELF) surface-mount glass package: cylindrical, leadless, hermetically sealed; cathode identified by single dark band; no discrete pins - terminals are axial ends of the cylinder.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded end | Connected to circuit ground or lower potential; polarity must be observed to avoid reverse breakdown failure. |
| Cathode | Banded end | Connected to positive reference node; voltage develops across anode-to-cathode with cathode at higher potential. |
Key Features
| Feature | Design Value |
|---|---|
| Temperature Compensation | Double-plug metallurgical construction achieves ±0.001 %/°C TC - eliminates need for external compensation networks. |
| Hermetic Sealing | DO-213AA glass package prevents humidity-induced parameter shift - ensures >20-year stability in sealed enclosures. |
| Low-Current Operation | Specified at 1.0 mA - enables use in ultra-low-power systems (e.g., satellite telemetry sensors) without sacrificing accuracy. |
| Military Qualification | Qualified per MIL-PRF-19500/452 (JANTXV level) - validated for radiation-hardened, high-reliability aerospace deployment. |
Applications
| High-Precision ADC Reference | Aerospace Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable reference voltage for 24-bit delta-sigma ADCs in flight control computers. IC Role / Device Role / Timing Role: Zener reference diode establishing absolute voltage基准 for analog-to-digital conversion. Use Value: ±0.001 %/°C TC and 10 mV stability ensure <0.002 % full-scale error over −55°C to +100°C ambient. | Use Scenario: Biasing bridge-based strain gauges in structural health monitoring systems on launch vehicles. IC Role / Device Role / Timing Role: Precision voltage reference for Wheatstone bridge excitation and ratiometric measurement. Use Value: Hermetic DO-213AA package prevents long-term drift under vibration and thermal vacuum conditions. |
| Calibration Equipment Standard | Defense-Grade Data Acquisition |
Use Scenario: Serving as primary voltage standard in portable field calibrators for multimeters and DMMs. IC Role / Device Role / Timing Role: Primary zener reference source traceable to NIST standards via factory calibration. Use Value: 10 mV max voltage change over full temperature range enables ±1 ppm accuracy without active oven control. | Use Scenario: Stabilizing reference rails in ruggedized DAQ modules deployed in armored vehicle electronics. IC Role / Device Role / Timing Role: Low-drift voltage reference for SAR ADCs and programmable gain instrumentation amplifiers. Use Value: JANTXV qualification and −65°C to +175°C rating support operation in extreme environmental envelopes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener reference diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CDLL4573A | Same electrical specs and DO-213AA package; identical test current, TC, stability, and impedance - functionally identical part number variant. | No application difference; same military qualification level and environmental ratings. | Select CDLL4573A when sourcing from legacy Microsemi part numbering; 1N4573AUR-1/TR is the JAN/JANTXV-compliant version. |
| LM399H | Integrated buried-zener with heater and op-amp; 0.3 ppm/°C TC vs. ±0.001 %/°C (10 ppm/°C); 6 V nominal vs. unspecified VZ for 1N4573AUR-1/TR. | Requires 10 mA bias and thermal management; suited for lab-grade instruments, not space-constrained embedded systems. | Choose LM399H only when sub-1 ppm/°C stability justifies higher power, cost, and board area; 1N4573AUR-1/TR remains optimal for low-power, hermetic, MELF-fit applications. |
Compared with CDLL4573A and LM399H, the 1N4573AUR-1/TR delivers military-qualified, ultra-low-TC zener performance in a compact hermetic MELF package at 1.0 mA - balancing precision, reliability, and size where integrated references are impractical.
Availability
1N4573AUR-1/TR is available at Aetrix Electronics and suitable for aerospace instrumentation, defense-grade data acquisition, and calibration equipment requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1N4573AUR-1/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
Microsemi Corporation (now part of Microchip Technology) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The 1N4573AUR-1/TR belongs to Microsemi's CDLL45xxA temperature-compensated zener reference family, developed specifically for precision voltage references in mission-critical systems where long-term stability and environmental robustness are mandatory.
FAQ
What is the nominal zener voltage of the 1N4573AUR-1/TR?
The nominal zener voltage is not explicitly stated in the provided data sheet excerpt for the 1N4573AUR-1/TR. It is part of the CDLL4573A series, which shares all electrical parameters except voltage rating; the exact VZ must be confirmed from the full Microsemi datasheet or manufacturer's parametric table. The 1N4573AUR-1/TR is defined by its 1.0 mA test current, ±0.001 %/°C TC, and 10 mV stability - not by a specific voltage value.
Is the 1N4573AUR-1/TR RoHS compliant?
No, the 1N4573AUR-1/TR uses tin/lead lead finish and is manufactured to MIL-PRF-19500/452 specifications, which permit Pb-containing finishes for high-reliability applications. It is not RoHS compliant. For RoHS-compliant alternatives, consult Microchip's current-generation surface-mount zener references with matte tin terminations.
What does "UR-1/TR" signify in the 1N4573AUR-1/TR part number?
"UR-1" denotes the DO-213AA (MELF) glass package variant per Microsemi's internal coding; "TR" indicates tape-and-reel packaging format (typically 1,000 units per reel). This distinguishes it from bulk or ammo-pack versions and confirms surface-mount compatibility with automated placement equipment.
Can the 1N4573AUR-1/TR replace the 1N4573AUR-1 in a design?
Yes - the 1N4573AUR-1/TR is functionally identical to the 1N4573AUR-1, differing only in packaging format (tape-and-reel vs. bulk). Electrical, thermal, and mechanical specifications are identical. No layout or schematic changes are required when substituting 1N4573AUR-1/TR for 1N4573AUR-1 in production.
What is the maximum reverse leakage current for the 1N4573AUR-1/TR at 25°C?
The maximum reverse leakage current for the 1N4573AUR-1/TR is 2 µA at 25°C and VR = 3 Vdc, as specified in the "REVERSE LEAKAGE CURRENT" section of the datasheet. This value applies across the full CDLL4565–CDLL4584A family and is verified under standard JEDEC test conditions.
1N4573AUR-1/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):
- -
- Tolerance:
- -
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 100 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
1N4573AUR-1/TR FAQ
1.How can I place an order for 1N4573AUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4573AUR-1/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 1N4573AUR-1/TR reliable?
The price and inventory of 1N4573AUR-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4573AUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N4573AUR-1/TR?
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4.How is shipping managed for 1N4573AUR-1/TR?
1N4573AUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4573AUR-1/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 1N4573AUR-1/TR?
For technical support, including 1N4573AUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4573AUR-1/TR requirements.
6.How does Aetrix verify that 1N4573AUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N4573AUR-1/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 1N4573AUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N4573AUR-1/TR?
All 1N4573AUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4573AUR-1/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 1N4573AUR-1/TR part is unused and in its original packaging.
Return procedure for 1N4573AUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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