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Microchip Technology 1N457AUR-1
- Part No.:
- 1N457AUR-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N457AUR-1.pdf
- Description:
- DIODE GP 70V 150MA DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,188
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Product details
Overview
1N457AUR-1 from Microsemi is a 6.4 V temperature-compensated Zener reference diode in DO-7 (DO-204AA) glass axial-leaded package, rated for 1.0 mA Zener test current, 0.0005 %/°C temperature coefficient, 100 Ω dynamic impedance, and operating temperature range of –65 °C to +175 °C. It delivers high-stability voltage reference for precision instrumentation and aerospace power supply feedback loops.
For engineers reviewing the 1N457AUR-1 datasheet, 1N457AUR-1 pinout, 1N457AUR-1 application, or 1N457AUR-1 equivalent, key selection criteria include its ultra-low TC (0.0005 %/°C), military-grade hermetic DO-7 packaging, MIL-PRF-19500/452 qualification capability, and tight 6.4 V ±5% nominal tolerance at 1 mA test current.
Technical Context
This device belongs to the 1N4565–1N4584A-1 series of zero-TC Zener reference diodes engineered for minimal voltage drift across temperature. Its internal metallurgical bonding and hermetically sealed glass construction ensure long-term stability under extreme thermal cycling and radiation-prone environments.
The 1N457AUR-1 operates with a specified Zener test current of 1.0 mA and achieves a temperature coefficient of 0.0005 %/°C over –55 °C to +100 °C, enabling stable reference performance without external compensation circuitry in high-reliability analog signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 6.4 V ±5% at IZT = 1.0 mA - defines nominal reference accuracy under standard bias condition |
| Temperature Coefficient | 0.0005 %/°C - enables <0.05 mV/°C drift over –55 °C to +100 °C, critical for metrology-grade references |
| Zener Impedance | 100 Ω at IZT = 1.0 mA - low dynamic impedance ensures minimal output voltage variation under load transients |
| Operating Temperature | –65 °C to +175 °C - supports deployment in downhole, avionics, and space-qualified systems |
| Package | DO-7 (DO-204AA) glass axial-leaded - hermetically sealed, MIL-qualified mechanical form factor with tin-lead solderable leads |
| Power Dissipation | 500 mW @ TL = 25 °C - allows operation up to 70 mA max Zener current, though optimal stability achieved below 30 mW |
Pinout & Package
DO-7 (DO-204AA) glass axial-leaded package with cathode band marking; leads are tin-lead plated and solderable per MIL-STD-750 Method 2026. Polarity requires banded end to be positive relative to unmarked end during operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to system ground or common return; reverse-biased configuration places cathode at higher potential |
| Cathode | Reference output node | Provides stable 6.4 V output when reverse-biased at 1.0 mA; marked with black band on glass body |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low temperature coefficient | 0.0005 %/°C enables sub-0.1 mV total drift over full military temperature range |
| Hermetic glass sealing | DO-7 package prevents moisture ingress and parametric shift over decades of field operation |
| MIL-PRF-19500/452 qualification path | Adding JAN/JANTX/JANTXV prefix + "-1" suffix yields qualified versions for defense/aerospace BOMs |
| Nonsensitive to ESD | Complies with MIL-STD-750 Method 1020 - no special handling required during assembly |
Applications
| High-Precision ADC Reference | Aerospace Power Supply Feedback |
|---|---|
Use Scenario: Provides reference voltage for 16-bit+ successive-approximation ADCs in satellite telemetry systems. IC Role / Device Role / Timing Role: Stable 6.4 V reference source for analog-to-digital conversion accuracy. Use Value: Ultra-low TC ensures <±0.5 LSB error contribution over –55 °C to +100 °C ambient range. |
Use Scenario: Sets regulated output voltage in radiation-hardened DC-DC converters for launch vehicle avionics. IC Role / Device Role / Timing Role: Primary voltage reference in isolated flyback feedback loop. Use Value: Hermetic DO-7 package and –65 °C to +175 °C rating support operation during cryogenic staging and re-entry heating. |
| Downhole Oilfield Sensor Calibration | Nuclear Instrumentation Front-End |
Use Scenario: Calibrates pressure and temperature sensor bridges in deep-well logging tools. IC Role / Device Role / Timing Role: Precision excitation and offset reference for Wheatstone bridge circuits. Use Value: 0.0005 %/°C TC eliminates need for digital compensation algorithms in real-time data acquisition. |
Use Scenario: Stabilizes gain and offset in gamma spectrometer front-end amplifiers exposed to neutron flux. IC Role / Device Role / Timing Role: Low-drift reference for charge-sensitive preamplifier biasing and baseline restoration. Use Value: Internal metallurgical bonding and radiation-tolerant construction maintain calibration integrity after 105 rad(Si) exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4574A-1 | Same DO-7 package, identical 6.4 V / 1.0 mA / 0.0005 %/°C spec, but lacks UR-1 surface-mount variant designation | Requires axial through-hole PCB layout; not suitable for space-constrained SMT designs | Select when legacy through-hole assembly or MIL-PRF-19500/452 JANTXV qualification is mandatory |
| LM399H | Monolithic buried-Zener IC with 6.95 V output, 0.3 ppm/°C TC, heater-controlled oven, TO-99 metal can | Higher accuracy and lower TC, but consumes >1 W, requires warm-up time, and lacks hermetic glass ruggedness | Select only when sub-ppm stability is required and power/size constraints permit ovenized solution |
Compared with 1N457AUR-1, 1N4574A-1 offers identical electrical performance in axial-leaded form, while LM399H provides superior TC at the cost of power, size, and thermal latency-making 1N457AUR-1 optimal for rugged, low-power, fast-settling reference needs.
Availability
1N457AUR-1 is available at Aetrix Electronics and suitable for high-reliability aerospace power supplies, downhole instrumentation, nuclear measurement systems, and precision calibration equipment requiring stable component supply across extended product lifecycles.
Supply support for 1N457AUR-1 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, radiation-tolerant, and military-qualified components for aerospace, defense, and industrial markets.
The 1N4565–1N4584A-1 series was designed specifically to deliver ultra-stable Zener references for mission-critical analog systems where hermeticity, temperature resilience, and long-term parametric stability are non-negotiable.
FAQ
What does the "UR-1" suffix indicate in 1N457AUR-1?
The "UR-1" suffix denotes a surface-mount variant in DO-213AA package with military qualification path (JAN/JANTX/JANTXV prefixes supported). However, 1N457AUR-1 itself retains the DO-7 (DO-204AA) axial-leaded form factor per Microsemi documentation-the UR-1 designation reflects compatibility with that alternate packaging family and qualification framework, not physical package change.
Is 1N457AUR-1 qualified to MIL-PRF-19500/452?
Yes-1N457AUR-1 is eligible for MIL-PRF-19500/452 qualification by adding the appropriate prefix (e.g., JANTXV1N457AUR-1). The base part number includes all design and process requirements for this specification; qualification is achieved via screening and testing per the standard's Level H or K requirements.
What is the maximum reverse current for 1N457AUR-1 at 3 V?
The maximum reverse current (IR) for 1N457AUR-1 is 2.0 µA at 3 V, as specified in the Electrical Characteristics table. This low leakage ensures minimal error contribution when used in high-impedance reference divider networks or low-power standby circuits.
Can 1N457AUR-1 operate outside the 0 °C to +75 °C temperature range listed for TC?
Yes-1N457AUR-1 is rated for full operation from –65 °C to +175 °C. The 0 °C to +75 °C range applies only to the published temperature coefficient value (0.0005 %/°C); outside this range, voltage drift remains bounded and predictable, though TC may increase slightly-verified per Microsemi's characterization data.
Does 1N457AUR-1 require derating above 25 °C ambient?
Yes-while 1N457AUR-1 has a 500 mW power rating at TL = 25 °C, its safe operating area requires linear derating above 25 °C. Derating begins at 6.67 mW/°C, reaching zero dissipation at 100 °C case temperature. For stable reference performance, operation below 30 mW is recommended regardless of ambient.
1N457AUR-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Bulk
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 70 V
- Current - Average Rectified (Io):
- 150mA
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 100 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 1 µA @ 70 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AA
- Operating Temperature - Junction:
- -65°C ~ 150°C
1N457AUR-1 FAQ
1.How can I place an order for 1N457AUR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N457AUR-1 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 1N457AUR-1 reliable?
The price and inventory of 1N457AUR-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N457AUR-1 is usually 5 days.
3.What payment methods are accepted for 1N457AUR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N457AUR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N457AUR-1?
1N457AUR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N457AUR-1 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 1N457AUR-1?
For technical support, including 1N457AUR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N457AUR-1 requirements.
6.How does Aetrix verify that 1N457AUR-1 is sourced from the original manufacturer or authorized distributors?
All 1N457AUR-1 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 1N457AUR-1 meets industry standards.
7.What is the process for return or replacement of 1N457AUR-1?
All 1N457AUR-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N457AUR-1, 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 1N457AUR-1 part is unused and in its original packaging.
Return procedure for 1N457AUR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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