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Texas Instruments LM336LP-2-5
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- Part No.:
- LM336LP-2-5
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
LM336LP-2-5.pdf
- Description:
- IC VREF SHUNT 4% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,896
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Product details
Overview
LM336LP-2-5 from Texas Instruments is a precision 2.5-V shunt voltage reference diode in TO-92 (LP) package, featuring ±1% initial tolerance, 0.27-Ω dynamic impedance at 1 mA, and temperature stability of 1.8–6 mV over 0°C to 70°C. It operates as a low-temperature-coefficient Zener-type reference for analog-to-digital converters, power supply feedback loops, and instrumentation amplifiers requiring stable low-voltage references.
For engineers reviewing the LM336LP-2-5 datasheet, LM336LP-2-5 pinout, LM336LP-2-5 application, or LM336LP-2-5 equivalent, key selection criteria include its 400 µA to 10 mA operating current range, trimmable ADJ terminal for minimum temperature drift, fast turn-on response, and compatibility with 5-V logic supply rails.
Technical Context
The LM336LP-2-5 implements a bandgap-derived 2.5-V reference with internal trimming capability via the ADJ pin, enabling precise adjustment of output voltage and temperature coefficient. Its three-terminal architecture separates cathode, anode, and adjustment functions-unlike two-terminal Zeners-allowing active compensation of thermal drift.
It functions exclusively as a shunt regulator: current flows through an external series resistor into the cathode, while the anode connects to ground or a negative rail. The ADJ pin provides access to an internal resistive divider node, permitting fine-tuning of VZ and dVZ/dT without altering external bias components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.49 V nominal at 1 mA; enables accurate 2.5-V reference generation from 5-V supplies with minimal headroom. |
| Initial Tolerance | ±1% at 25°C; ensures first-pass accuracy in calibration-critical circuits without post-manufacture trimming. |
| Dynamic Impedance | 0.27 Ω at 1 mA; maintains voltage stability under load transients up to 10 mA, reducing output ripple. |
| Operating Current Range | 400 µA to 10 mA; supports low-power sensor interfaces and high-current reference buffering in mixed-signal systems. |
| Temp Stability (0°C–70°C) | 1.8–6 mV total variation; meets industrial-grade requirements for metering and process control applications. |
| Long-Term Drift | 20 ppm/khr; guarantees reference stability over years of continuous operation in embedded monitoring systems. |
| Thermal Resistance | 140°C/W (θJA); requires derating above 70°C ambient or heatsinking for sustained >5 mA operation. |
Pinout & Package
LM336LP-2-5 uses the TO-92 (LP) package-a 3-pin through-hole plastic case with straight leads, 5.34 mm max height, and JEDEC TO-226 compliance. Pin 1 is Anode, Pin 2 is Cathode, Pin 3 is ADJ (adjust). No internal connection exists between pins beyond the specified roles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Reference ground node | Connects to system ground or negative rail; establishes reference potential baseline for VZ measurement. |
| Cathode (Pin 2) | Output voltage node | Delivers regulated 2.5 V; sinks current from external series resistor; polarity defines shunt operation direction. |
| ADJ (Pin 3) | Trim node | Accesses internal resistive divider; allows external potentiometer to minimize temperature coefficient and set exact VZ. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable temperature coefficient | Enables user trimming to <1 mV/°C drift using external potentiometer on ADJ pin-critical for high-accuracy thermocouple or RTD signal chains. |
| Low dynamic impedance | 0.27 Ω at 1 mA reduces output voltage shift under load changes, improving ADC LSB accuracy in data acquisition systems. |
| Wide operating current range | 400 µA–10 mA accommodates both ultra-low-power IoT sensors and high-drive op-amp reference buffers without redesign. |
| Fast turn-on time | Enables use in power-supply sequencing and wake-up circuits where reference stabilization must occur within microseconds. |
| Shunt topology flexibility | Operates as positive or negative reference by reconfiguring anode/cathode connections-supports bipolar op-amp designs and isolated feedback paths. |
Applications
| Digital Multimeter Reference | Industrial PLC Analog Input Module |
|---|---|
Use Scenario: Precision DC voltage measurement in handheld DMMs requiring traceable 2.5-V reference against 5-V microcontroller supply. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable excitation for 16-bit SAR ADC and calibration offset correction. Use Value: ±1% initial tolerance and 20 ppm/khr long-term drift ensure metrology-grade accuracy over product lifetime without recalibration. | Use Scenario: Signal conditioning front-end in modular I/O cards accepting 0–10 V or 4–20 mA field inputs. IC Role / Device Role / Timing Role: Primary reference for programmable gain instrumentation amplifier and sigma-delta ADC reference buffer. Use Value: 0.27-Ω dynamic impedance maintains reference integrity during multiplexed channel switching transients, preserving measurement repeatability. |
| Battery-Powered Sensor Node | Programmable Power Supply Feedback |
Use Scenario: Low-power environmental sensor (e.g., humidity, pressure) interfacing to MSP430 MCU with integrated 12-bit ADC. IC Role / Device Role / Timing Role: Low-current shunt reference supplying stable 2.5 V to ADC and analog front-end at 400 µA quiescent current. Use Value: 400 µA minimum operating current enables operation directly from coin-cell batteries for multi-year deployments. | Use Scenario: Output voltage regulation in lab-grade bench power supplies with digital DAC-controlled setpoint. IC Role / Device Role / Timing Role: Precision shunt reference feeding error amplifier in isolated flyback or buck-boost feedback loop. Use Value: Adjustable ADJ pin allows factory calibration to compensate for transformer winding ratio tolerances and optocoupler CTR variation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACLP | 2.495 V reference, 0.2 Ω dynamic impedance, wider 1–100 mA current range, no ADJ pin for temp coefficient trimming. | Lacks user-adjustable temperature coefficient; suited for fixed-accuracy applications where board space permits SOT-23 footprint. | Select when higher current drive or tighter dynamic impedance is prioritized over drift optimization. |
| REF200AP | 2.048 V reference, 0.1 Ω impedance, 100 µA–10 mA range, integrated current source, no ADJ pin. | Fixed 2.048 V output optimized for 12-bit ADC full-scale; not trimmable; requires external resistor for 2.5 V scaling. | Choose for ultra-low-power sensor nodes needing guaranteed 100 µA start-up current and built-in current source functionality. |
Compared with TL431ACLP and REF200AP, the LM336LP-2-5 uniquely supports on-board temperature coefficient minimization via its ADJ pin-making it preferred for applications demanding long-term stability across industrial temperature ranges without factory calibration equipment.
Availability
LM336LP-2-5 is available at Aetrix Electronics and suitable for industrial automation, test & measurement equipment, and battery-powered instrumentation requiring stable component supply with full traceability and lifecycle continuity.
Supply support for LM336LP-2-5 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 company headquartered in Dallas, Texas, specializing in analog ICs, embedded processors, and high-reliability components for industrial, automotive, and communications markets.
The LM336 family was designed specifically for precision shunt reference applications in cost-sensitive, space-constrained systems where adjustable temperature stability and compatibility with standard 5-V logic rails are essential.
FAQ
What is the maximum operating temperature range for the LM336LP-2-5?
The LM336LP-2-5 is characterized for operation from 0°C to 70°C ambient temperature. This range is defined in the official Texas Instruments datasheet SLVS063E and applies specifically to the LM336 and LM336B variants in LP (TO-92) packaging. Exceeding 70°C ambient may cause parametric shift beyond specifications, especially in dynamic impedance and temperature coefficient performance. Derating is required above 70°C per the device's 140°C/W thermal resistance.
Can the LM336LP-2-5 be used as a negative voltage reference?
Yes, the LM336LP-2-5 can function as a negative voltage reference by reversing the anode and cathode connections: connect the cathode to the negative rail and the anode to system ground. In this configuration, the device regulates −2.5 V relative to ground. The ADJ pin remains functional for trimming, and all electrical specifications-including dynamic impedance and temperature stability-apply identically in either polarity mode per the SLVS063E datasheet.
How do I adjust the temperature coefficient of the LM336LP-2-5?
To adjust the temperature coefficient of the LM336LP-2-5, connect a 10-kΩ potentiometer between the ADJ pin and ground, with its wiper tied to the cathode. Adjust the pot until the reference voltage exhibits minimum change across the 0°C to 70°C range. This procedure is documented in Figure 5 of the SLVS063E datasheet and relies on the internal resistive divider accessed via the ADJ terminal-no external op-amps or complex circuitry are required.
What is the minimum operating current for stable regulation in the LM336LP-2-5?
The LM336LP-2-5 requires a minimum operating current of 400 µA to maintain regulation within specification. Below this threshold, the reference voltage deviates significantly from 2.49 V, and dynamic impedance rises sharply. This value is confirmed in the "Electrical Characteristics" table of SLVS063E and applies across the full 0°C to 70°C temperature range. For battery-powered designs, ensure the series resistor limits current to ≥400 µA even at lowest input voltage.
Is the LM336LP-2-5 RoHS compliant and lead-free?
Yes, the LM336LP-2-5 is RoHS compliant and features a tin (Sn) lead finish, as confirmed in the TI Package Option Addendum dated 15-Jul-2026. The part marking "336-25" appears on the TO-92 body, and the device is rated for lead-free reflow processing. No lead (Pb) is present in the termination finish, and the packaging meets EU Directive 2011/65/EU requirements without exemption claims.
LM336LP-2-5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.49V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±4%
- Temperature Coefficient:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 400 µA
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
LM336LP-2-5 FAQ
1.How can I place an order for LM336LP-2-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM336LP-2-5 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 LM336LP-2-5 reliable?
The price and inventory of LM336LP-2-5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM336LP-2-5 is usually 5 days.
3.What payment methods are accepted for LM336LP-2-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM336LP-2-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM336LP-2-5?
LM336LP-2-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM336LP-2-5 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 LM336LP-2-5?
For technical support, including LM336LP-2-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM336LP-2-5 requirements.
6.How does Aetrix verify that LM336LP-2-5 is sourced from the original manufacturer or authorized distributors?
All LM336LP-2-5 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 LM336LP-2-5 meets industry standards.
7.What is the process for return or replacement of LM336LP-2-5?
All LM336LP-2-5 units undergo pre-shipment inspection (PSI). If there is an issue with LM336LP-2-5, 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 LM336LP-2-5 part is unused and in its original packaging.
Return procedure for LM336LP-2-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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