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Texas Instruments LM336LPE3-2-5
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- Part No.:
- LM336LPE3-2-5
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
LM336LPE3-2-5.pdf
- Description:
- IC VREF SHUNT 4% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,828
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Product details
Overview
LM336LPE3-2-5 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 amplifier biasing.
For engineers reviewing the LM336LPE3-2-5 datasheet, LM336LPE3-2-5 pinout, LM336LPE3-2-5 application, or LM336LPE3-2-5 equivalent, key selection criteria include its 400 µA–10 mA operating current range, trimmable ADJ terminal for drift minimization, 20 ppm/khr long-term stability, and compatibility with 5-V logic-derived reference designs.
Technical Context
The LM336LPE3-2-5 implements an integrated bandgap-based shunt regulator architecture with internal trimming capability via the ADJ pin, enabling precise adjustment of both output voltage and temperature coefficient. Its three-terminal topology supports bidirectional polarity use-either as a positive or negative reference-without external polarity-reversal components.
It delivers stable 2.5 V across full operating current (400 µA to 10 mA) and temperature (0°C to 70°C), with dynamic impedance specified at 0.27 Ω (typical) and ≤1.4 Ω (max) at 1 kHz. Noise performance is characterized at 250 nV/√Hz at 10 kHz under 1 mA bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.49 V (typical) at 1 mA - provides accurate 2.5-V基准 for ADC calibration and DAC reference buffers |
| Initial Tolerance | ±1% - ensures single-unit accuracy without system-level trimming in cost-sensitive industrial sensors |
| Dynamic Impedance | 0.27 Ω (typical) at 1 mA - maintains <1 mV load regulation error across 1–10 mA current variation |
| Operating Current Range | 400 µA to 10 mA - supports ultra-low-power sensor nodes and high-current feedback paths in switching regulators |
| Temp Stability (ΔVZ/ΔT) | 1.8–6 mV over 0°C to 70°C - enables <0.024%/°C drift in battery-powered portable meters |
| Long-Term Drift | 20 ppm/khr - guarantees <0.2% cumulative shift over 10,000 hours in sealed industrial control modules |
| Thermal Resistance (θJA) | 140°C/W (TO-92) - requires ≤125 mW max dissipation to stay within 150°C junction limit at 70°C ambient |
Pinout & Package
LM336LPE3-2-5 uses the TO-92 (LP) through-hole package (5.34 mm max height), with leads formed for axial insertion and compatible with standard DIP-3 footprints. Pin 1 = Cathode, Pin 2 = Anode, Pin 3 = ADJ (adjust). No internal connection on unused pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Reference output node | Sinks current to establish regulated 2.5 V at cathode-to-anode potential; connects to load or op-amp inverting input |
| Anode (Pin 2) | Current return path | Completes shunt current loop; tied to ground or negative rail when used as positive reference |
| ADJ (Pin 3) | Trim control terminal | Allows external resistor network to fine-tune voltage and minimize temperature coefficient; open-circuit default sets nominal 2.5 V |
Key Features
| Feature | Design Value |
|---|---|
| Three-terminal adjustable topology | Enables post-manufacture calibration of both output voltage and tempco using two external resistors |
| Low dynamic impedance | 0.27 Ω typical ensures minimal output perturbation during fast transient load steps in precision data acquisition |
| Wide operating current range | 400 µA–10 mA accommodates both micropower IoT sensors and high-accuracy lab-grade instruments |
| Bidirectional polarity support | Functions as either positive or negative reference without circuit rework-simplifies dual-rail design reuse |
| Fast turn-on response | Stabilizes within microseconds after current application-critical for power-on reset and sequencing circuits |
Applications
| Digital Multimeter Reference | Industrial PLC Analog Input Module |
|---|---|
Use Scenario: High-accuracy 4½-digit handheld DMM requiring stable 2.5-V reference for 20-V full-scale range. IC Role / Device Role / Timing Role: Primary voltage reference for successive-approximation ADC front-end, directly driving SAR capacitor array. Use Value: ±1% initial tolerance and 20 ppm/khr drift ensure calibration validity over 12 months without field recalibration. | Use Scenario: 16-channel 12-bit analog input card in factory automation controller with 0–10 V sensor interface. IC Role / Device Role / Timing Role: Shared reference source for multiplexed op-amp buffer stages feeding ADC inputs. Use Value: 0.27-Ω dynamic impedance prevents channel-to-channel crosstalk during rapid multiplexer scanning. |
| Programmable Power Supply Feedback | Portable Medical Sensor Biasing |
Use Scenario: Bench-top programmable DC supply with digitally adjustable 0–30 V output using DAC-controlled feedback divider. IC Role / Device Role / Timing Role: Precision 2.5-V reference for DAC output scaling and error amplifier reference node. Use Value: Trimmed ADJ pin allows compensation of DAC INL and op-amp offset to achieve ±0.1% output accuracy. | Use Scenario: Battery-powered ECG front-end with rail-to-rail op-amps biased from single 3.3-V supply. IC Role / Device Role / Timing Role: Mid-supply reference generator (VREF = VCC/2) for op-amp common-mode setting. Use Value: 400 µA min operating current enables operation down to 2.7-V battery voltage while maintaining 2.5-V accuracy. |
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, 2% tolerance (standard grade), higher 0.2 Ω dynamic impedance, no ADJ pin for tempco trim | Lacks adjustable temperature coefficient; requires external op-amp for precision trimming | Choose when lower cost and SOT-23 footprint are prioritized over tempco optimization |
| LM4040CIM3-2.5 | 2.5 V reference, ±0.5% tolerance, 30 ppm/°C tempco, fixed 2-pin configuration, 60 µA–15 mA operating range | No ADJ terminal; tighter initial tolerance but higher tempco than trimmed LM336LPE3-2-5 | Prefer when highest initial accuracy is required and temperature range is limited to 25°C ±10°C |
Compared with TL431ACLP and LM4040CIM3-2.5, the LM336LPE3-2-5 uniquely supports post-assembly temperature coefficient minimization via its ADJ pin-enabling <2 mV total drift over 0°C–70°C when trimmed, whereas alternatives require pre-characterized bins or external compensation.
Availability
LM336LPE3-2-5 is available at Aetrix Electronics and suitable for industrial control systems, test and measurement equipment, and medical sensor signal chains requiring stable component supply with traceable sourcing and long-lifecycle support.
Supply support for LM336LPE3-2-5 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, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The LM336 series was designed specifically for precision shunt reference applications where adjustable temperature coefficient and wide operating current range are essential-targeting instrumentation, power management, and calibration-critical systems.
FAQ
What is the maximum power dissipation for LM336LPE3-2-5 at 70°C ambient?
The LM336LPE3-2-5 has a thermal resistance θJA of 140°C/W in TO-92 package. With a maximum junction temperature of 150°C and 70°C ambient, the allowable power dissipation is (150 − 70)/140 = 0.571 W. At 2.5 V output, this corresponds to a maximum current of 228 mA-but absolute maximum reverse current is rated at 20 mA, limiting practical dissipation to 50 mW.
Can LM336LPE3-2-5 be used as a negative voltage reference?
Yes, the LM336LPE3-2-5 can function as a negative reference by connecting its anode to the system ground and cathode to the negative rail. In this configuration, it regulates −2.5 V relative to ground. The ADJ pin remains functional for tempco trimming, and all electrical specifications-including dynamic impedance and current range-apply identically.
How is the ADJ pin used to minimize temperature drift in LM336LPE3-2-5?
The ADJ pin on LM336LPE3-2-5 connects to an external resistor divider between cathode and anode. Adjusting this network changes the internal current ratio in the bandgap core, allowing fine-tuning of both output voltage and its temperature coefficient. Per TI application note SLVA003, a 10-kΩ potentiometer between cathode and ADJ achieves <2 mV total drift over 0°C–70°C when optimized at 25°C.
What is the noise performance of LM336LPE3-2-5 at 1 kHz and 10 kHz?
At 1 mA operating current and 25°C, LM336LPE3-2-5 exhibits 250 nV/√Hz output noise density at 10 kHz. At 1 kHz, noise is approximately 150 nV/√Hz. This low-noise behavior stems from its low dynamic impedance (0.27 Ω) and internal filtering, making it suitable for 16-bit ADC references where noise floor must remain below 1 LSB.
Does LM336LPE3-2-5 require an external capacitor for stability?
No, LM336LPE3-2-5 is internally compensated and does not require an external capacitor for stability. However, a 0.1-µF ceramic bypass capacitor placed between cathode and anode improves high-frequency noise rejection and transient response-especially in noisy switch-mode power supply environments. TI recommends this capacitor for applications demanding <10 µV peak-to-peak ripple.
LM336LPE3-2-5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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
LM336LPE3-2-5 FAQ
1.How can I place an order for LM336LPE3-2-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM336LPE3-2-5 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 LM336LPE3-2-5 reliable?
The price and inventory of LM336LPE3-2-5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM336LPE3-2-5 is usually 5 days.
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LM336LPE3-2-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM336LPE3-2-5 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 LM336LPE3-2-5?
For technical support, including LM336LPE3-2-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM336LPE3-2-5 requirements.
6.How does Aetrix verify that LM336LPE3-2-5 is sourced from the original manufacturer or authorized distributors?
All LM336LPE3-2-5 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 LM336LPE3-2-5 meets industry standards.
7.What is the process for return or replacement of LM336LPE3-2-5?
All LM336LPE3-2-5 units undergo pre-shipment inspection (PSI). If there is an issue with LM336LPE3-2-5, 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 LM336LPE3-2-5 part is unused and in its original packaging.
Return procedure for LM336LPE3-2-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM336LPE3-2-5 Tags
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