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Texas Instruments LM136AH-2.5/883
- Part No.:
- LM136AH-2.5/883
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-206AB, TO-46-3 Metal Can
- Datasheet:
-
LM136AH-2.5/883.pdf
- Description:
- IC VREF SHUNT 2.5V TO46-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,891
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Product details
Overview
LM136AH-2.5/883 from Texas Instruments is a radiation-hardened, precision 2.5V shunt voltage reference diode in a hermetically sealed TO-46 metal can package. It delivers 2.5V output with ±10 mV Zener voltage drift over temperature, 0.6 Ω typical reverse dynamic impedance, and operates across 400 μA–10 mA cathode current. Used as a stable low-voltage reference in space-grade power supplies and radiation-tolerant instrumentation.
For engineers reviewing the LM136AH-2.5/883 datasheet, LM136AH-2.5/883 pinout, LM136AH-2.5/883 application, or LM136AH-2.5/883 equivalent, key selection criteria include total ionizing dose (TID) tolerance of 100 krad(Si), ELDRS-free performance, trimmable temperature coefficient, and MIL-STD-883 Class B qualification for high-reliability embedded systems.
Technical Context
The LM136AH-2.5/883 functions as a three-terminal monolithic shunt regulator, where the third terminal enables external adjustment of both output voltage and temperature coefficient. Its architecture integrates a precision zener core with low-impedance buffering, enabling stable 2.5V reference generation without requiring series pass elements.
It supports bidirectional polarity use-configured as either positive or negative voltage reference-and maintains specified performance across −55°C to +125°C ambient, with junction temperature up to +150°C. Radiation qualification includes TID testing per MIL-STD-883 Method 1019 and full Group A conformance per Method 5005.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 2.44 V to 2.54 V at IZ = 1 mA; ensures precise 2.5V nominal reference under standard bias |
| Reverse Dynamic Impedance | 0.6 Ω (Subgroup 1); minimizes output voltage variation under load transients |
| Temperature Stability | ±18 mV after adjustment to 2.490 V; guarantees tight thermal drift in critical measurement circuits |
| Operating Current Range | 400 μA to 10 mA; allows flexible biasing in low-power and high-accuracy applications |
| Radiation Tolerance | 100 krad(Si) TID, ELDRS-free; qualified for long-duration space missions and nuclear environments |
| Operating Temperature | −55°C to +125°C; supports deployment in extreme environmental conditions without derating |
| Adjust Current Range | ±125 μA at VAdj = 0.7 V; enables fine trimming of voltage and tempco using external potentiometer |
Pinout & Package
LM136AH-2.5/883 uses a hermetically sealed TO-46 metal can package (JEDEC TO-46 / TI package NDV0003H), 3-pin configuration with bottom-view pin assignment: Pin 1 = Cathode, Pin 2 = Anode, Pin 3 = Adjust. Package height ≤2.67 mm, lead diameter ≤0.64 mm, and designed for through-hole mounting with solderable nickel-iron leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Cathode) | Reference Output Terminal | Delivers regulated 2.5V output; connects to load or feedback node in shunt configuration |
| Pin 2 (Anode) | Ground / Return Path | Serves as common reference return; required for proper zener bias and thermal stability |
| Pin 3 (Adjust) | Trim Control Terminal | Allows external resistor network to adjust output voltage and minimize temperature coefficient |
Key Features
| Feature | Design Value |
|---|---|
| Third-terminal voltage trim | Enables independent optimization of output voltage and temperature coefficient using external potentiometer |
| Low dynamic impedance | 0.6 Ω typical ensures minimal output perturbation during current transients in precision analog circuits |
| MIL-STD-883 Class B screening | Full Group A testing per Method 5005 confirms reliability for defense and aerospace mission-critical use |
| ELDRS-free radiation response | No enhanced low-dose-rate sensitivity observed at 100 krad(Si), eliminating need for annealing in orbit |
| Wide operating current range | 400 μA–10 mA operation supports ultra-low-power sensor interfaces and high-accuracy metering |
Applications
| Spacecraft Power Monitoring | Nuclear Instrumentation |
|---|---|
|
Use Scenario: Real-time monitoring of solar array bus voltage in LEO satellites with onboard telemetry. IC Role / Device Role / Timing Role: Precision 2.5V shunt reference for ADC input scaling in radiation-hardened data acquisition units. Use Value: Maintains ±18 mV stability over −55°C to +125°C and survives 100 krad(Si) TID exposure without recalibration. |
Use Scenario: High-stability bias reference in gamma spectroscopy front-end amplifiers deployed in reactor containment zones. IC Role / Device Role / Timing Role: Low-noise, radiation-tolerant voltage reference for charge-sensitive preamplifier gain-setting networks. Use Value: 0.6 Ω dynamic impedance prevents signal distortion during pulse pile-up events; ELDRS-free behavior ensures long-term calibration integrity. |
| Avionics Flight Control Sensors | Strategic Missile Guidance Systems |
|
Use Scenario: Reference source for inertial measurement unit (IMU) analog signal conditioning in fighter jet flight computers. IC Role / Device Role / Timing Role: Trimmed 2.490V shunt reference used in op-amp-based ratiometric sensor excitation circuits. Use Value: Adjustable tempco allows compensation for PCB thermal gradients; −55°C to +125°C operation covers full aircraft envelope. |
Use Scenario: Critical voltage reference in solid-state guidance computer power regulation subsystems requiring zero-failure probability. IC Role / Device Role / Timing Role: Primary 2.5V reference for redundant DC-DC converter feedback loops and watchdog timer thresholds. Use Value: Hermetic TO-46 packaging and MIL-STD-883 Group A/B screening ensure zero latent defects and proven field reliability over 20+ year service life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM136A-2.5QML | Same die, identical electrical specs, but packaged in ceramic TO-46 (NDV) with different marking and screening flow | Qualified to QML Level V (not QML-SP); lacks space-level radiation test documentation for ELDRS at 100 krad(Si) | Select when full QML-SP documentation is not required and cost-sensitive military programs dominate procurement |
| REF102KP | Higher initial accuracy (±0.05%), lower tempco (3 ppm/°C), but only rated to 50 krad(Si) and non-MIL-STD-883 screened | Not suitable for spaceflight or nuclear environments; limited to high-precision lab equipment and commercial avionics | Choose only for ground-based test systems where radiation hardness is irrelevant and sub-10 ppm stability is mandatory |
Compared with LM136A-2.5QML and REF102KP, the LM136AH-2.5/883 uniquely combines MIL-STD-883 Class B screening, 100 krad(Si) TID rating, ELDRS-free validation, and hermetic TO-46 packaging-making it the sole option qualified for strategic space and defense platforms requiring zero-radiation-induced parametric shift.
Availability
LM136AH-2.5/883 is available at Aetrix Electronics and suitable for spacecraft power monitoring, nuclear instrumentation, avionics flight control sensors, and strategic missile guidance systems requiring stable component supply across extended production lifecycles.
Supply support for LM136AH-2.5/883 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and high-reliability ICs for industrial, aerospace, and defense markets.
The LM136AH-2.5/883 belongs to TI's QML-qualified precision voltage reference product line, engineered specifically for radiation-tolerant, mission-critical analog signal chains in space and nuclear environments.
FAQ
What is the radiation qualification level of LM136AH-2.5/883?
The LM136AH-2.5/883 is fully qualified per MIL-STD-883 Method 1019 for total ionizing dose (TID) up to 100 krad(Si) and is ELDRS-free at that level. It undergoes full Group A conformance testing per Method 5005, including static/dynamic/functional tests across −55°C, +25°C, and +125°C. This makes LM136AH-2.5/883 appropriate for geosynchronous orbit and reactor monitoring applications where cumulative radiation exposure exceeds 50 krad(Si).
Can LM136AH-2.5/883 be used as a negative voltage reference?
Yes, LM136AH-2.5/883 operates as a shunt regulator and can be configured as a negative voltage reference by reversing its anode and cathode connections relative to system ground. The device's symmetrical breakdown characteristics and low dynamic impedance ensure stable −2.5V output when biased correctly. This capability is explicitly confirmed in the TI SNOSAM3E datasheet Figure 20 (Op Amp with Output Clamped) and Application Hints section.
What is the purpose of the Adjust pin (Pin 3) on LM136AH-2.5/883?
The Adjust pin (Pin 3) on LM136AH-2.5/883 enables external trimming of both output voltage and temperature coefficient. By connecting a potentiometer between Pin 3 and ground-or adding series diodes as shown in Figure 13 of the datasheet-it allows precise adjustment to 2.490V for minimum tempco. The ±125 μA adjust current range provides predictable, linear control without affecting core zener stability, making LM136AH-2.5/883 ideal for calibration-critical systems.
Is LM136AH-2.5/883 RoHS-compliant?
No, LM136AH-2.5/883 is not RoHS-compliant. As indicated in TI's Package Option Addendum, the part marking "LM136AH-2.5/883" carries a "No" RoHS designation due to its leaded nickel-iron alloy leads and hermetic metal-can construction required for radiation hardness and military reliability. It complies with J-STD-006 for Pb-containing solderability and is approved for use in exempted defense and space applications per EU Directive 2011/65/EU Annex III.
What package type does LM136AH-2.5/883 use, and how is it mounted?
LM136AH-2.5/883 uses a hermetically sealed TO-46 metal can package (TI designation NDV0003H, JEDEC TO-46 equivalent), with 3 leads arranged in triangular configuration. It is designed for through-hole mounting using standard axial-lead insertion and wave or hand soldering at ≤300°C for 10 seconds. The package drawing specifies 2.67 mm max height, 0.64 mm max lead diameter, and requires non-solder-mask-defined land pattern per TI's example board layout.
LM136AH-2.5/883 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-206AB, TO-46-3 Metal Can
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 400 µA
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-46-3
LM136AH-2.5/883 FAQ
1.How can I place an order for LM136AH-2.5/883 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM136AH-2.5/883 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 LM136AH-2.5/883 reliable?
The price and inventory of LM136AH-2.5/883 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM136AH-2.5/883 is usually 5 days.
3.What payment methods are accepted for LM136AH-2.5/883?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM136AH-2.5/883 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM136AH-2.5/883?
LM136AH-2.5/883 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM136AH-2.5/883 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 LM136AH-2.5/883?
For technical support, including LM136AH-2.5/883 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM136AH-2.5/883 requirements.
6.How does Aetrix verify that LM136AH-2.5/883 is sourced from the original manufacturer or authorized distributors?
All LM136AH-2.5/883 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 LM136AH-2.5/883 meets industry standards.
7.What is the process for return or replacement of LM136AH-2.5/883?
All LM136AH-2.5/883 units undergo pre-shipment inspection (PSI). If there is an issue with LM136AH-2.5/883, 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 LM136AH-2.5/883 part is unused and in its original packaging.
Return procedure for LM136AH-2.5/883:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM136AH-2.5/883 Tags
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TL431AIDBZR
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