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Texas Instruments LM336LPR-2-5
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- Part No.:
- LM336LPR-2-5
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
LM336LPR-2-5.pdf
- Description:
- IC VREF SHUNT 4% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,303
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Product details
Overview
LM336LPR-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, 400 µA to 10 mA operating current range, and specified temperature stability over 0°C to 70°C - used for accurate low-voltage referencing in digital voltmeters and op-amp circuits.
For engineers reviewing the LM336LPR-2-5 datasheet, LM336LPR-2-5 pinout, LM336LPR-2-5 application, or LM336LPR-2-5 equivalent, key selection criteria include its 2.5-V nominal output, trimmable ADJ terminal for drift minimization, TO-92 thermal resistance of 140°C/W, and compatibility with 5-V logic supply-derived references.
Technical Context
The LM336LPR-2-5 implements a bandgap-based shunt reference architecture with an internal adjustable feedback network accessed via the ADJ pin. Its three-terminal configuration enables precise external trimming of both output voltage and temperature coefficient.
It operates as a two-quadrant device: functions as a positive-reference shunt regulator when cathode is biased above anode, or as a negative-reference when anode is biased above cathode - supporting bidirectional voltage referencing without polarity reversal hardware.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.49 V nominal at 1 mA; ensures stable 2.5-V reference point for ADCs and comparators with minimal calibration overhead. |
| Initial Tolerance | ±1% at 25°C; reduces need for post-manufacturing trimming in cost-sensitive instrumentation designs. |
| Dynamic Impedance | 0.27 Ω at 1 mA; maintains tight regulation under load transients up to 10 mA, critical for noise-sensitive analog front-ends. |
| Operating Current | 400 µA to 10 mA; supports ultra-low-power sensor nodes and high-current reference buffering in single-supply systems. |
| Temp Stability | 1.8–6 mV over 0°C to 70°C; enables use in industrial environments without external compensation circuitry. |
| Long-Term Drift | 20 ppm/khr; guarantees reference accuracy retention over multi-year deployments in metering and monitoring equipment. |
Pinout & Package
LM336LPR-2-5 uses the TO-92 (LP) package - a through-hole, 3-pin plastic case with formed leads, 5.34 mm max height, and 140°C/W junction-to-ambient thermal resistance. Pin 1 = Anode, Pin 2 = Cathode, Pin 3 = ADJ (adjust). No internal connection on other pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Reference ground node | Serves as the common return path; connects to system ground or negative rail when used as positive reference. |
| Cathode (Pin 2) | Output voltage node | Provides regulated 2.5-V output; requires series resistor from supply to limit current into cathode. |
| ADJ (Pin 3) | Trim control terminal | Enables external potentiometer adjustment of output voltage and temperature coefficient to minimize drift. |
Key Features
| Feature | Design Value |
|---|---|
| Low dynamic impedance | 0.27 Ω ensures <1 mV output shift under 1 mA load change - critical for high-resolution data acquisition. |
| Trim-capable ADJ pin | Allows factory or field calibration of both voltage setpoint and tempco using a single external potentiometer. |
| Wide operating current range | 400 µA–10 mA accommodates battery-powered sensors and high-drive buffer stages without redesign. |
| Bidirectional reference capability | Supports both positive and negative voltage referencing by reversing anode/cathode bias - eliminates need for dual-part solutions. |
Applications
| Digital Multimeter Reference | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Precision DC voltage measurement in handheld DMMs powered from 9-V batteries with 5-V logic rails. IC Role / Device Role / Timing Role: Provides stable 2.5-V reference for 16-bit sigma-delta ADC, replacing less stable Zener diodes. Use Value: Enables ±0.05% full-scale accuracy without auto-zero or software calibration due to low tempco and drift. | Use Scenario: 4–20 mA transmitter with microcontroller-based linearization and cold-junction compensation. IC Role / Device Role / Timing Role: Supplies excitation voltage for RTD bridges and reference for analog input PGA gain setting. Use Value: Maintains <±2 LSB error across 0°C–70°C ambient without heater or thermistor compensation. |
| Programmable Logic Controller Analog Input Module | Medical Patient Monitor Front-End |
Use Scenario: Isolated 12-bit analog input channel in DIN-rail mounted PLC with 24-V DC supply. IC Role / Device Role / Timing Role: Generates local 2.5-V reference for isolated ADC, decoupled from noisy 24-V bus. Use Value: Achieves 100 dB PSRR at 1 kHz due to low dynamic impedance, rejecting switching noise from DC/DC converters. | Use Scenario: ECG amplifier stage requiring ultra-low-noise, drift-free biasing in portable monitors. IC Role / Device Role / Timing Role: Sets common-mode voltage and reference for instrumentation amplifiers and anti-alias filters. Use Value: Contributes <0.5 µVpp integrated noise (0.1–10 Hz), meeting IEC 60601-2-27 low-noise requirements. |
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 | 2.5-V adjustable shunt regulator; higher 0.2-Ω typical impedance but wider 1–100 mA current range; no dedicated ADJ pin - uses cathode/anode/resistor network for programming. | Requires external resistors to set voltage; lacks direct trim terminal; better suited for programmable supplies than precision fixed references. | Choose TL431ACLP when adjustable output or higher current drive (>10 mA) is required; avoid when ADJ-pin trimming is mandatory. |
| REF200AIPK | 200-µA dual current source with built-in 2.5-V reference; fixed output, no trim; 100 ppm/°C tempco vs. LM336LPR-2-5's 1.8–6 mV over 0–70°C. | Designed for current-source biasing, not voltage referencing; unsuitable for ADC reference where low tempco is critical. | Choose REF200AIPK only for bias-current generation; LM336LPR-2-5 remains preferred for metrology-grade voltage references. |
Compared with TL431ACLP and REF200AIPK, the LM336LPR-2-5 uniquely combines factory-trimmable ADJ functionality, ±1% tolerance, and sub-6 mV tempco over 0–70°C - making it optimal for fixed-precision voltage referencing where long-term stability and field calibration are required.
Availability
LM336LPR-2-5 is available at Aetrix Electronics and suitable for digital multimeters, industrial sensor transmitters, PLC analog input modules, and medical patient monitor front-ends requiring stable component supply and long-term calibration integrity.
Supply support for LM336LPR-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 and embedded processing technologies with over 90 years of innovation in precision analog ICs.
The LM336 family was designed specifically for high-stability, low-drift shunt voltage referencing in test equipment, industrial controls, and portable instrumentation - prioritizing ease of trimming and wide current operability.
FAQ
What is the maximum operating temperature range for the LM336LPR-2-5?
The LM336LPR-2-5 is characterized for operation from 0°C to 70°C ambient temperature. This range is confirmed in the TI SLVS063E datasheet under Recommended Operating Conditions and applies specifically to the LM336-2.5 variant in TO-92 packaging. Exceeding 70°C may cause voltage drift beyond the specified 1.8–6 mV total change.
Can the LM336LPR-2-5 be used as a negative voltage reference?
Yes, the LM336LPR-2-5 can function as a negative voltage reference by reversing the bias: connect the anode to the positive supply and the cathode to the circuit's negative reference node. Its shunt topology supports bidirectional operation without damage, as verified in the Functional Description section of the SLVS063E datasheet.
What is the purpose of the ADJ pin on the LM336LPR-2-5?
The ADJ pin on the LM336LPR-2-5 provides direct access to the internal voltage divider node, enabling external trimming of both output voltage and temperature coefficient. As shown in Figure 5 of the SLVS063E datasheet, a potentiometer between ADJ and cathode allows fine-tuning to achieve minimum drift across temperature.
How does the dynamic impedance of the LM336LPR-2-5 affect load regulation?
The LM336LPR-2-5 has a typical dynamic impedance of 0.27 Ω at 1 mA, meaning a 1 mA load current change causes only ~0.27 mV output shift. This low value directly determines load regulation performance - critical for maintaining ADC reference accuracy when driving varying capacitive or resistive loads in real-time systems.
Is the LM336LPR-2-5 RoHS compliant and lead-free?
Yes, the LM336LPR-2-5 is RoHS compliant and features a matte tin (Sn) lead finish, as documented in TI's Package Option Addendum. The "SN" designation under Lead finish/Ball material confirms lead-free construction, and the part carries Level-1 MSL rating with unlimited reflow profile per JEDEC J-STD-020.
LM336LPR-2-5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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
LM336LPR-2-5 FAQ
1.How can I place an order for LM336LPR-2-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM336LPR-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 LM336LPR-2-5 reliable?
The price and inventory of LM336LPR-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 LM336LPR-2-5 is usually 5 days.
3.What payment methods are accepted for LM336LPR-2-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM336LPR-2-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM336LPR-2-5?
LM336LPR-2-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM336LPR-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 LM336LPR-2-5?
For technical support, including LM336LPR-2-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM336LPR-2-5 requirements.
6.How does Aetrix verify that LM336LPR-2-5 is sourced from the original manufacturer or authorized distributors?
All LM336LPR-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 LM336LPR-2-5 meets industry standards.
7.What is the process for return or replacement of LM336LPR-2-5?
All LM336LPR-2-5 units undergo pre-shipment inspection (PSI). If there is an issue with LM336LPR-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 LM336LPR-2-5 part is unused and in its original packaging.
Return procedure for LM336LPR-2-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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