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Microchip Technology 1N4570A/TR
- Part No.:
- 1N4570A/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N4570A/TR.pdf
- Description:
- DIODE ZENER 6.4V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:4,028
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Product details
Overview
1N4570A/TR from Microsemi is a 6.4 V temperature-compensated Zener reference diode in DO-7 (DO-204AA) glass axial-leaded package, rated for 0.5 mA test current, ±0.01%/°C temperature coefficient, 100 Ω dynamic impedance, and operating across –65°C to +175°C. It delivers stable voltage reference in precision analog instrumentation requiring minimal drift.
For engineers reviewing the 1N4570A/TR datasheet, 1N4570A/TR pinout, 1N4570A/TR application, or 1N4570A/TR equivalent, key selection criteria include its 6.4 V nominal Zener voltage with ±5% tolerance, low TC of 0.01%/°C, DO-7 hermetic glass packaging, 500 mW power dissipation rating, and military-grade qualification path via JAN/JANTX prefixes.
Technical Context
This device belongs to Microsemi's zero-temperature-coefficient Zener family optimized for high-stability voltage references. Its 6.4 V nominal Zener voltage leverages silicon bandgap and Zener breakdown interaction to achieve low TC, with specified operation at IZT = 0.5 mA and thermal stability validated over –65°C to +175°C.
The 1N4570A/TR uses internal metallurgical bonding within a hermetically sealed glass case, ensuring long-term parameter stability and ESD insensitivity per MIL-STD-750 Method 1020. Its DO-7 package supports axial-leaded through-hole mounting and complies with JEDEC registration for the 1N4565–1N4584 series.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.4 V ±5% at IZT = 0.5 mA - defines primary reference accuracy under standard test conditions |
| Temperature Coefficient (αVZ) | ±0.01%/°C - ensures minimal voltage drift over temperature, critical for precision analog circuits |
| Zener Impedance (ZZT) | 100 Ω at IZT = 0.5 mA - indicates low AC impedance for stable regulation under varying load |
| Power Dissipation | 500 mW @ TL = 25°C - sets maximum continuous DC power handling before thermal derating |
| Operating Temperature | –65°C to +175°C - enables use in aerospace, downhole, and military environments |
| Reverse Current (IR) | ≤2.0 µA @ 3 V - confirms low leakage below breakdown, preserving reference integrity |
Pinout & Package
DO-7 (DO-204AA) hermetically sealed glass axial-leaded package with cathode band marking; leads are tin-lead plated and solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference diode cathode-connected terminal | Connected to circuit ground or lower potential node; banded end is cathode, so anode is unmarked lead |
| Cathode | Reference diode anode-connected terminal | Banded end - must be held positive relative to anode to operate in reverse-biased Zener region |
Key Features
| Feature | Design Value |
|---|---|
| Temperature-compensated Zener structure | Combines avalanche and Zener mechanisms to achieve ±0.01%/°C TC for <1 mV/°C drift in 6.4 V reference |
| Hermetic glass DO-7 package | Provides long-term parameter stability and moisture resistance essential for mission-critical analog references |
| MIL-PRF-19500/452 qualification path | Enables military-grade versions (e.g., JANTX1N4570A-1) without redesigning board layout or circuit topology |
| Nonsensitive to ESD | Complies with MIL-STD-750 Method 1020 - eliminates need for external ESD protection in handling and assembly |
Applications
| High-Accuracy Data Acquisition Systems | Aerospace Avionics Power Monitoring |
|---|---|
Use Scenario: Reference input for 16-bit+ ADCs and DACs in environmental sensor arrays and telemetry units. IC Role / Device Role / Timing Role: Precision voltage reference establishing absolute scale for analog-to-digital conversion. Use Value: ±0.01%/°C TC and 6.4 V nominal value enable sub-LSB error over –55°C to +100°C operating range. |
Use Scenario: Voltage monitoring in flight control power distribution units exposed to wide thermal cycling. IC Role / Device Role / Timing Role: Stable reference for comparator-based overvoltage/undervoltage detection circuits. Use Value: Hermetic DO-7 package and –65°C to +175°C rating ensure reliability during extreme thermal transients. |
| Downhole Oil & Gas Instrumentation | Military Grade Test Equipment Calibration |
Use Scenario: Pressure and temperature transducer signal conditioning in borehole logging tools. IC Role / Device Role / Timing Role: Primary reference for low-drift op-amp biasing and sensor excitation. Use Value: Internal metallurgical bonding prevents parameter shift under mechanical shock and sustained high temperature. |
Use Scenario: Calibration reference in portable multimeters and automated test equipment requiring traceable accuracy. IC Role / Device Role / Timing Role: Stable 6.4 V source for self-calibration routines and front-end gain setting. Use Value: Tight ±5% initial tolerance and low 100 Ω ZZT support repeatable, low-noise calibration performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4570 | Same 6.4 V / 0.5 mA / ±0.01%/°C spec, but non-A grade - wider initial VZ tolerance (±10% vs ±5%) | Suitable for less demanding industrial references where cost outweighs precision | Select 1N4570A/TR when ±5% VZ tolerance and guaranteed low TC are required for calibration-grade designs |
| 1N4571A | Identical DO-7 package and ±0.005%/°C TC, but rated for 1.0 mA IZT - higher ZZT (100 Ω) unchanged, different optimal bias point | Better suited for circuits with higher quiescent current availability and tighter TC requirements | Choose 1N4571A only if design can supply 1.0 mA and requires improved TC (0.005%/°C vs 0.01%/°C) |
Compared with 1N4570 and 1N4571A, the 1N4570A/TR offers the optimal balance of tight ±5% VZ tolerance, verified ±0.01%/°C TC, and 0.5 mA low-power operation - making it preferred for battery-powered or thermally constrained precision references where layout and qualification path must remain consistent.
Availability
1N4570A/TR is available at Aetrix Electronics and suitable for high-reliability analog instrumentation, aerospace power monitoring, and downhole sensor conditioning requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1N4570A/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 (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog and RF components for aerospace, defense, and industrial markets.
The 1N4570A/TR belongs to Microsemi's legacy 1N4565–1N4584A-1 series of temperature-compensated Zener reference diodes, engineered specifically for applications demanding ultra-stable voltage references under extreme thermal and radiation environments.
FAQ
What is the Zener voltage tolerance for 1N4570A/TR?
The 1N4570A/TR has a nominal Zener voltage of 6.4 V with a tolerance of ±5%, as specified in the Electrical Characteristics table at IZT = 0.5 mA and 25°C. This tighter tolerance distinguishes the "A" grade from the base 1N4570, which carries ±10% tolerance. The 1N4570A/TR maintains this specification across its qualified operating temperature range when used within rated power limits.
Does 1N4570A/TR require external current limiting?
Yes, the 1N4570A/TR must be operated with a series current-limiting resistor to maintain IZ near its specified test current of 0.5 mA. Without proper biasing, regulation accuracy degrades due to TC variation and increased ZZT. The 1N4570A/TR datasheet specifies that optimum voltage-temperature stability occurs only when operated at the designated IZT, not at arbitrary currents.
Is 1N4570A/TR suitable for surface-mount designs?
No, the 1N4570A/TR is packaged in the axial-leaded DO-7 (DO-204AA) glass case and is intended for through-hole mounting. Microsemi offers surface-mount equivalents such as the JANTX1N4569AUR-1 in DO-213AA, but the 1N4570A/TR itself has no SMT variant. Its TR suffix denotes tape-and-reel packaging for automated through-hole insertion, not surface-mount compatibility.
What does the "TR" suffix mean in 1N4570A/TR?
The "TR" suffix in 1N4570A/TR indicates tape-and-reel packaging per EIA-296 standard, enabling automated pick-and-place handling during through-hole assembly. It does not alter electrical specifications or package dimensions - the device remains a DO-7 glass axial-leaded diode with identical 6.4 V, 0.5 mA, and ±0.01%/°C characteristics as the bulk version. The TR format supports high-volume manufacturing while preserving full compliance with MIL-PRF-19500/452 qualification paths.
Can 1N4570A/TR be used in radiation-exposed environments?
The base 1N4570A/TR is not radiation-hardened; however, Microsemi offers RH-qualified variants (e.g., RH4570A) with the "RH" prefix instead of "1N", designed for total ionizing dose (TID) resilience. The 1N4570A/TR itself meets MIL-STD-750 ESD testing but lacks radiation hardness certification. For space or nuclear applications, RH4570A - not 1N4570A/TR - must be selected and verified against mission-specific radiation requirements.
1N4570A/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 6.4 V
- Tolerance:
- ±5%
- 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:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N4570A/TR FAQ
1.How can I place an order for 1N4570A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4570A/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 1N4570A/TR reliable?
The price and inventory of 1N4570A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4570A/TR is usually 5 days.
3.What payment methods are accepted for 1N4570A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4570A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4570A/TR?
1N4570A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4570A/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 1N4570A/TR?
For technical support, including 1N4570A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4570A/TR requirements.
6.How does Aetrix verify that 1N4570A/TR is sourced from the original manufacturer or authorized distributors?
All 1N4570A/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 1N4570A/TR meets industry standards.
7.What is the process for return or replacement of 1N4570A/TR?
All 1N4570A/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4570A/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 1N4570A/TR part is unused and in its original packaging.
Return procedure for 1N4570A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4570A/TR Tags
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