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Texas Instruments LM336BD-2-5
- Part No.:
- LM336BD-2-5
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM336BD-2-5.pdf
- Description:
- IC VREF SHUNT 2% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:369
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Product details
Overview
LM336BD-2-5 from Texas Instruments is a precision 2.5-V shunt voltage reference diode in an 8-pin SOIC package, featuring ±1% initial tolerance, 0.27-Ω dynamic impedance at 1 mA, and temperature stability of 1.8 mV over 0°C to 70°C. It operates as a low-temperature-coefficient Zener-type reference with adjustable output via the ADJ pin, used in digital voltmeters, precision power supplies, and op-amp biasing circuits requiring stable 2.5-V references derived from 5-V logic rails.
For engineers reviewing the LM336BD-2-5 datasheet, LM336BD-2-5 pinout, LM336BD-2-5 application, or LM336BD-2-5 equivalent, key selection criteria include its 400 µA–10 mA operating current range, trimmable temperature coefficient, fast turn-on response, and compatibility with both positive and negative reference configurations in low-power analog and mixed-signal systems.
Technical Context
The LM336BD-2-5 implements a bandgap-derived 2.5-V reference core with internal trimming capability via the ADJ terminal, enabling minimization of temperature drift across its 0°C to 70°C operating range. Its 0.27-Ω dynamic impedance ensures minimal output voltage variation under load current changes from 400 µA to 10 mA.
Unlike standard Zener diodes, it integrates active circuitry-including precision current sources and feedback transistors-to achieve stable regulation without external components. The third-terminal (ADJ) allows fine adjustment of both reference voltage and temperature coefficient, supporting high-accuracy calibration in production test environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.49 V nominal at 1 mA; enables accurate 2.5-V biasing for ADCs, DACs, and comparators without scaling resistors. |
| Initial Tolerance | ±1% at 25°C; reduces system-level calibration burden in production test for metering and sensor signal chains. |
| Dynamic Impedance | 0.27 Ω at 1 mA and 1 kHz; maintains <±2.6 mV output shift across full 400 µA–10 mA operating current range. |
| Temp Stability | 1.8 mV over 0°C to 70°C; supports stable operation in industrial control and automotive cabin electronics. |
| Operating Current | 400 µA to 10 mA; allows low-power battery-operated designs while retaining regulation integrity. |
| Long-Term Drift | 20 ppm/khr; ensures reference stability over years in instrumentation and calibration equipment. |
| Noise Voltage | 250 nV/√Hz at 10 Hz; suitable for high-resolution measurement front-ends where reference noise dominates SNR. |
Pinout & Package
LM336BD-2-5 uses an 8-pin SOIC (D) package with 1.27-mm pitch, 3.91-mm body width, and 1.75-mm max height per JEDEC MS-012 AA. Pin 1 is located at the top-left corner with notch or dot marking; pins 2–7 are NC (no internal connection); pin 8 is CATHODE, pin 1 is ANODE, and pin 3 is ADJ.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | ANODE | Connects to ground or negative rail in standard shunt configuration; defines current sink path for regulation. |
| Pin 3 | ADJ | Provides access to internal reference node for external trimming resistor; enables temperature coefficient optimization. |
| Pin 8 | CATHODE | Output terminal delivering regulated 2.5 V; connects to load and series current-limiting resistor. |
| Pins 2,4–7 | NC | No internal connection; must remain unconnected or tied to ground only if required by PCB layout constraints. |
Key Features
| Feature | Design Value |
|---|---|
| Trim-adjustable temperature coefficient | Enables post-manufacture calibration to ≤1.8 mV drift over 0°C–70°C using external potentiometer on ADJ pin. |
| Low dynamic impedance (0.27 Ω) | Minimizes load-induced voltage error in high-precision current-sense amplifiers and ratiometric sensor interfaces. |
| Wide operating current range (400 µA–10 mA) | Supports dual-mode operation: ultra-low-power standby (400 µA) and high-stability active mode (10 mA). |
| Fast turn-on time | Stabilizes within microseconds after power application-critical for wake-up circuits in energy-harvesting systems. |
| Bipolar reference capability | Configurable as either positive or negative voltage reference by reversing anode/cathode connections. |
Applications
| Digital Multimeter Reference | Industrial PLC Analog Input Module |
|---|---|
Use Scenario: High-accuracy DC voltage measurement in handheld DMMs with auto-ranging and 4½-digit resolution. IC Role / Device Role / Timing Role: Primary 2.5-V reference for 24-bit sigma-delta ADC, providing ratiometric scaling against internal reference. Use Value: ±1% initial tolerance and 20 ppm/khr long-term drift ensure calibration validity over 2-year service intervals without field recalibration. |
Use Scenario: Signal conditioning of 4–20 mA current-loop inputs in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Stable excitation reference for precision current-to-voltage conversion and offset compensation in analog input stages. Use Value: 0.27-Ω dynamic impedance prevents gain error shifts during transient load changes caused by multiplexed channel switching. |
| Medical Patient Monitor Front-End | Automotive Cabin Temperature Sensor Interface |
Use Scenario: Biopotential acquisition in ECG/EEG modules requiring sub-microvolt baseline stability. IC Role / Device Role / Timing Role: Low-noise 2.5-V reference for instrumentation amplifier biasing and ADC reference in isolated analog front-end. Use Value: 250 nV/√Hz noise floor at 10 Hz avoids degrading SNR in low-frequency bio-signal bands dominated by 1/f noise. |
Use Scenario: Linearized thermistor readout in HVAC control units operating across −40°C to +85°C ambient. IC Role / Device Role / Timing Role: Precision reference for ratiometric ADC measurement of thermistor divider output. Use Value: Adjustable temperature coefficient allows compensation of thermistor nonlinearity while maintaining 0.1°C accuracy over full automotive temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACDR | Programmable 2.495-V reference with 0.2-Ω impedance; requires external resistors for 2.5-V setting; no ADJ pin for tempco trimming. | Used in feedback loops of switching regulators; less suited for metrology-grade trimming due to fixed tempco. | Select when cost-sensitive designs require adjustable output but do not need factory-calibrated tempco optimization. |
| REF5025AIDR | 2.5-V series reference with 3-ppm/°C drift, 0.1-µV p-p noise, and 10-µA quiescent current; SOIC-8 package; no ADJ pin. | Preferred in high-precision data acquisition where ultra-low drift and noise outweigh shunt topology benefits. | Choose for battery-powered portable instruments needing ultra-stable reference without external current source. |
Compared with TL431ACDR and REF5025AIDR, the LM336BD-2-5 uniquely combines factory-trimmable temperature coefficient, bipolar operation capability, and shunt topology for direct integration into legacy 5-V logic-supplied systems-making it optimal for cost-constrained industrial and test equipment where post-production calibration is required.
Availability
LM336BD-2-5 is available at Aetrix Electronics and suitable for digital multimeters, industrial PLC analog input modules, and medical patient monitor front-ends requiring stable component supply with consistent parametric performance across production lots.
Supply support for LM336BD-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 leader specializing in analog, embedded processing, and connectivity technologies, with over 90 years of innovation in precision analog ICs.
The LM336BD-2-5 belongs to TI's precision shunt voltage reference product line, designed specifically for metrology-grade applications demanding low drift, trimmable temperature coefficient, and robust operation in industrial and test equipment environments.
FAQ
What is the maximum operating current for LM336BD-2-5?
The LM336BD-2-5 supports a maximum reverse current of 10 mA under recommended operating conditions. Exceeding this value risks exceeding the absolute maximum rating of 20 mA and may cause thermal overstress or long-term parameter shift. At 10 mA, the device maintains its specified 2.49 V output with ≤6 mV deviation across temperature, making LM336BD-2-5 suitable for medium-current reference applications such as op-amp bias networks and ADC reference buffers.
How does the ADJ pin function in LM336BD-2-5?
The ADJ pin on LM336BD-2-5 provides access to the internal reference node, allowing external resistor networks to adjust both output voltage and temperature coefficient. By connecting a potentiometer between ADJ and ANODE or CATHODE, users can minimize temperature-induced drift-verified in TI's application note SLVA005B. This feature makes LM336BD-2-5 distinct from fixed-reference alternatives and essential for high-accuracy calibration workflows where LM336BD-2-5 is deployed in production test fixtures.
Can LM336BD-2-5 be used as a negative voltage reference?
Yes, LM336BD-2-5 can operate as a negative voltage reference by reversing the anode and cathode connections-connecting the CATHODE to ground and the ANODE to the negative rail. In this configuration, the ADJ pin remains functional for trimming, and all electrical specifications including dynamic impedance and temperature stability apply. This bipolar capability enables LM336BD-2-5 use in dual-supply op-amp circuits and differential sensor interfaces without requiring additional level-shifting components.
What is the thermal resistance (θJA) of LM336BD-2-5 in SOIC package?
The junction-to-ambient thermal resistance (θJA) for LM336BD-2-5 in the SOIC (D) package is 97°C/W, measured per JESD 51-7 standards. This value assumes standard PCB layout with 1 in² copper pour on the component side. At 10 mA and 2.5 V, power dissipation is 25 mW, resulting in a worst-case junction temperature rise of 2.4°C above ambient-well within the 150°C absolute maximum rating. Proper thermal design ensures LM336BD-2-5 maintains specification compliance across its full 0°C to 70°C operating range.
Is LM336BD-2-5 RoHS compliant and lead-free?
Yes, LM336BD-2-5 is RoHS compliant and features a NIPDAU (nickel-palladium-gold) lead finish, as confirmed in TI's Package Option Addendum dated July 2026. It meets JEDEC Level-1 moisture sensitivity requirements with unlimited peak reflow exposure up to 260°C, supporting standard lead-free soldering processes. All production lots of LM336BD-2-5 shipped by Aetrix Electronics carry full RoHS documentation and traceable compliance certification for LM336BD-2-5.
LM336BD-2-5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.49V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±2%
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LM336BD-2-5 FAQ
1.How can I place an order for LM336BD-2-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM336BD-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 LM336BD-2-5 reliable?
The price and inventory of LM336BD-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 LM336BD-2-5 is usually 5 days.
3.What payment methods are accepted for LM336BD-2-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM336BD-2-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM336BD-2-5?
LM336BD-2-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM336BD-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 LM336BD-2-5?
For technical support, including LM336BD-2-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM336BD-2-5 requirements.
6.How does Aetrix verify that LM336BD-2-5 is sourced from the original manufacturer or authorized distributors?
All LM336BD-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 LM336BD-2-5 meets industry standards.
7.What is the process for return or replacement of LM336BD-2-5?
All LM336BD-2-5 units undergo pre-shipment inspection (PSI). If there is an issue with LM336BD-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 LM336BD-2-5 part is unused and in its original packaging.
Return procedure for LM336BD-2-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM336BD-2-5 Tags
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