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Microchip Technology 1N822
- Part No.:
- 1N822
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N822.pdf
- Description:
- DIODE ZENER 6.2V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:5,720
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Product details
Overview
1N822 from Microsemi is a double-anode, temperature-compensated Zener reference diode with nominal 6.2 V zener voltage, ±5% tolerance (5.9–6.5 V), 7.5 mA test current, and 0.01%/°C effective temperature coefficient. It operates in both polarities and delivers stable voltage reference performance for precision analog circuits across -65°C to +175°C.
For engineers reviewing the 1N822 datasheet, 1N822 pinout, 1N822 application, or 1N822 equivalent, key selection criteria include dual-anode configuration, DO-35 hermetic glass package, low 15 Ω zener impedance at 7.5 mA, minimal 96 mV ∆VZ over -55°C to +100°C, and MIL-qualified variants with "-1" suffix.
Technical Context
The 1N822 is a double-anode Zener diode: its electrical specifications apply under both forward and reverse bias polarities, enabling symmetrical reference use in bidirectional circuits. It uses temperature compensation via internal junction design to achieve 0.01%/°C TC - significantly lower than standard Zeners - when biased at 7.5 mA.
Its DO-35 (DO-204AH) hermetically sealed glass package supports operation from -65°C to +175°C, with tin-lead plated leads compliant to MIL-STD-750 Method 2026. The cathode band is omitted per marking convention for double-anode variants like 1N822 and 1N824.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.9–6.5 V @ 7.5 mA - defines stable reference point for analog calibration and feedback loops |
| Temperature Coefficient (αVZ) | 0.01 %/°C - ensures <±1 mV drift over 100°C span at nominal bias |
| Zener Impedance (ZZT) | 15 Ω @ 7.5 mA - limits output voltage variation under load current changes |
| Max ∆VZ (-55°C to +100°C) | 96 mV - guarantees absolute reference stability across extended industrial temperature range |
| Power Dissipation | 500 mW @ TL = 25°C - enables robust thermal margin in high-reliability PCB layouts |
| Reverse Current (IR) | ≤2.0 µA @ 3 V - minimizes leakage-induced error in high-impedance reference nodes |
| Capacitance | ≤100 pF - preserves high-frequency stability in active filter and oscillator reference paths |
Pinout & Package
Package: DO-35 (DO-204AH), hermetically sealed glass axial-leaded case with tin-lead plated leads. Double-anode construction means no cathode band marking; terminals are functionally symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 | Reference node (bidirectional) | Operates as anode in forward bias or cathode in reverse bias - enables dual-polarity reference use |
| Anode 2 | Reference node (bidirectional) | Electrically identical to Anode 1; allows symmetrical connection in bridge or differential reference topologies |
Key Features
| Feature | Design Value |
|---|---|
| Double-anode configuration | Enables bidirectional voltage reference operation without polarity constraints in precision analog signal chains |
| 0.01 %/°C temperature coefficient | Reduces thermal drift to ≤1 mV over 100°C span - critical for aerospace and downhole instrumentation |
| Hermetic DO-35 glass package | Ensures long-term parameter stability and moisture resistance in harsh environments (MIL-PRF-19500 qualified variants available) |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for external ESD protection during handling and assembly in automated production lines |
| Low 100 pF capacitance | Maintains phase integrity in high-speed comparator reference inputs and PLL loop filter nodes |
Applications
| High-Reliability Power Supply Calibration | Aerospace Sensor Signal Conditioning |
|---|---|
Use Scenario: Precision DC-DC converter feedback network requiring traceable voltage reference over -55°C to +125°C. IC Role / Device Role / Timing Role: Primary voltage reference for error amplifier input in isolated flyback regulator. Use Value: 96 mV ∆VZ over full temp range ensures <±0.15% output regulation drift without trimming. | Use Scenario: Bridge-based strain gauge interface in flight control actuator electronics. IC Role / Device Role / Timing Role: Dual-rail excitation reference for Wheatstone bridge and ADC reference buffer. Use Value: Double-anode symmetry eliminates polarity-dependent offset errors in differential measurement paths. |
| Downhole Oilfield Instrumentation | Military Grade Data Acquisition Front-End |
Use Scenario: Pressure transducer signal chain operating continuously at +175°C ambient in wellbore tools. IC Role / Device Role / Timing Role: Stable bias reference for op-amp gain-setting resistors and ADC reference divider. Use Value: Hermetic DO-35 package and -65°C to +175°C rating prevent parametric shift under extreme thermal cycling. | Use Scenario: MIL-STD-1553 bus interface card requiring radiation-tolerant analog references. IC Role / Device Role / Timing Role: Voltage reference for DAC output scaling and analog watchdog circuitry. Use Value: JANTXV-qualified variants (e.g., JANTXV1N822-1) provide tested reliability for Class H military deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N824 | Identical 6.2 V nominal, same 0.01%/°C TC and DO-35 package; also double-anode with no cathode band | No functional distinction - used interchangeably where dual-anode symmetry is required | Select 1N824 only if sourcing constraints require alternate part number within same family |
| 1N823A | Same 6.2 V range but single-anode, 0.005%/°C TC (lower drift), 10 Ω ZZT, and cathode band marking | Not suitable for bidirectional circuits; requires polarity-aware layout and biasing | Choose 1N823A only when tighter TC and lower impedance outweigh need for double-anode flexibility |
Compared with 1N824, the 1N822 offers identical double-anode functionality and thermal stability but differs in minor process lot controls; compared with 1N823A, it trades lower impedance and tighter TC for essential bidirectional operation in symmetrical analog topologies.
Availability
1N822 is available at Aetrix Electronics and suitable for high-reliability power supply calibration, aerospace sensor signal conditioning, and downhole oilfield instrumentation requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1N822 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, RF, and radiation-hardened components for defense, aerospace, and industrial markets.
The 1N822 belongs to Microsemi's legacy Scottsdale Division Zener reference diode product line, engineered specifically for ultra-stable voltage references in mission-critical systems where temperature drift and long-term parametric stability are non-negotiable.
FAQ
What is the zener voltage tolerance and test condition for the 1N822?
The 1N822 has a zener voltage range of 5.9–6.5 V, representing ±5% tolerance around the nominal 6.2 V value. This specification is measured at a zener test current (IZT) of 7.5 mA and ambient temperature of 25°C, per JEDEC-registered electrical characteristics in the official Microsemi datasheet.
Why does the 1N822 have no cathode band marking on its DO-35 package?
The 1N822 is a double-anode Zener diode, meaning both terminals are functionally symmetric and operate as either anode or cathode depending on bias polarity. Per Microsemi's datasheet, cathode band marking is omitted for double-anode variants including 1N822 and 1N824 to avoid misleading polarity indication.
What is the maximum allowable voltage change (∆VZ) for the 1N822 over temperature?
The 1N822 exhibits a maximum ∆VZ of 96 mV over the temperature range of -55°C to +100°C. This value represents the total observed deviation from nominal VZ at any discrete temperature within that span, ensuring predictable reference stability in industrial and aerospace environments.
Can the 1N822 be used in military-grade designs?
Yes - the 1N822 can be ordered in military-qualified versions by adding the "-1" suffix (e.g., 1N822-1) for internal metallurgical bond construction, and prefixes such as JANTX or JANTXV for full MIL-PRF-19500/159 compliance. These variants maintain identical electrical specs while meeting rigorous screening and reliability standards.
How does the 1N822's temperature coefficient compare to standard Zener diodes?
The 1N822 achieves an effective temperature coefficient of 0.01%/°C - up to 10× lower than typical 5.6 V Zeners (~0.1%/°C) - due to proprietary temperature-compensated junction design. This enables sub-millivolt drift over 100°C, making it suitable for applications where standard Zeners would require active compensation.
1N822 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 6.2 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 15 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)
1N822 FAQ
1.How can I place an order for 1N822 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N822 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 1N822 reliable?
The price and inventory of 1N822 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N822 is usually 5 days.
3.What payment methods are accepted for 1N822?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N822 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N822?
1N822 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N822 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 1N822?
For technical support, including 1N822 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N822 requirements.
6.How does Aetrix verify that 1N822 is sourced from the original manufacturer or authorized distributors?
All 1N822 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 1N822 meets industry standards.
7.What is the process for return or replacement of 1N822?
All 1N822 units undergo pre-shipment inspection (PSI). If there is an issue with 1N822, 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 1N822 part is unused and in its original packaging.
Return procedure for 1N822:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N822 Tags
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