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Texas Instruments LM336BDR-2-5
- Part No.:
- LM336BDR-2-5
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM336BDR-2-5.pdf
- Description:
- IC VREF SHUNT 2% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,882
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Product details
Overview
LM336BDR-2-5 from Texas Instruments is a precision 2.5-V shunt voltage reference IC in SOIC-8 package, featuring ±1% initial tolerance, 0.27-Ω dynamic impedance at 1 mA, and temperature stability of ≤6 mV over 0°C to 70°C. It operates as a low-temperature-coefficient Zener-like reference with adjustable output via the ADJ pin, used in digital voltmeters, precision power supplies, and op-amp biasing circuits.
For engineers reviewing the LM336BDR-2-5 datasheet, LM336BDR-2-5 pinout, LM336BDR-2-5 application, or LM336BDR-2-5 equivalent, key selection criteria include its 400 µA–10 mA operating current range, 3.5 mV max tempco drift over full range, trimmable reference voltage, fast turn-on response, and compatibility with 5-V logic supply rails.
Technical Context
The LM336BDR-2-5 implements an integrated bandgap-derived shunt reference architecture with internal trimming capability via the ADJ terminal. Its three-terminal configuration (CATHODE, ANODE, ADJ) enables precise external adjustment of both output voltage and temperature coefficient.
It functions as a two-terminal device when ADJ is tied to CATHODE, delivering fixed 2.49 V nominal output; with external resistor networks, it supports fine-tuning for minimum drift. The design includes low-noise circuitry (250 nV/√Hz at 1 kHz) and stable operation across 0°C to 70°C ambient range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.49 V nominal at IZ = 1 mA - provides stable 2.5-V reference compatible with 5-V logic rails. |
| Initial Tolerance | ±1% at 25°C - ensures accurate calibration without post-manufacture trimming in many applications. |
| Dynamic Impedance | 0.27 Ω at 1 mA - minimizes output voltage variation under load transients. |
| Operating Current Range | 400 µA to 10 mA - supports low-power sensing and high-current regulation modes. |
| Temperature Stability | ≤6 mV over 0°C to 70°C - enables use in commercial-grade instrumentation without active compensation. |
| Long-Term Drift | 20 ppm/khr - maintains accuracy over years in deployed systems. |
| Noise Voltage | 250 nV/√Hz at 1 kHz - suitable for high-resolution ADC references and precision analog front-ends. |
Pinout & Package
LM336BDR-2-5 is housed in an 8-pin SOIC (D) package with 1.27-mm lead pitch and 1.75-mm maximum height. Pin 1 is located at the top-left corner adjacent to the index notch or dot marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 6, 7, 8 | No internal connection (NC) | Unused pins; must be left floating or grounded per layout best practices-no electrical function. |
| 4 | Anode | Connects to system ground or negative rail; defines reference polarity for shunt operation. |
| 5 | Cathode | Output node delivering regulated 2.5-V reference; sinks current into load or feedback network. |
| ADJ (Pin 3) | Adjust terminal | Enables external trimming of reference voltage and temperature coefficient using resistor networks. |
Key Features
| Feature | Design Value |
|---|---|
| Trim-capable reference | Third ADJ terminal allows calibration of both output voltage and temperature coefficient during production or field service. |
| Low dynamic impedance | 0.27 Ω at 1 mA ensures minimal load-induced error in precision feedback loops. |
| Wide operating current | 400 µA–10 mA range supports ultra-low-power sensor interfaces and robust industrial supply monitoring. |
| Fast turn-on time | Enables rapid system initialization in power-up sequencing and wake-from-sleep applications. |
| Stable over temperature | Specified performance from 0°C to 70°C eliminates need for external thermal compensation in commercial environments. |
Applications
| Digital Voltmeter Reference | Op-Amp Precision Biasing |
|---|---|
|
Use Scenario: High-resolution 4½-digit DVM requiring stable 2.5-V reference for ADC full-scale calibration. IC Role / Device Role / Timing Role: Shunt voltage reference providing primary scaling voltage to successive-approximation ADC input stage. Use Value: ±1% initial tolerance and 20 ppm/khr long-term drift ensure measurement repeatability across calibration cycles and product lifetime. |
Use Scenario: Dual-supply op-amp circuit generating precise mid-rail virtual ground in single-supply data acquisition systems. IC Role / Device Role / Timing Role: Active shunt reference establishing stable 2.5-V common-mode point for rail-to-rail input amplifiers. Use Value: 0.27-Ω dynamic impedance prevents loading-induced offset shift when driving capacitive op-amp inputs. |
| Programmable Power Supply Feedback | Industrial Sensor Signal Conditioning |
|
Use Scenario: Adjustable bench power supply where output voltage is set via DAC-controlled feedback divider. IC Role / Device Role / Timing Role: Fixed 2.5-V reference injected into feedback node to define regulation setpoint independent of DAC resolution limits. Use Value: Trimmed ADJ pin allows factory calibration to cancel DAC gain error and improve overall output accuracy to ±0.5%. |
Use Scenario: 4–20 mA transmitter with RTD or strain gauge bridge requiring excitation and reference stability. IC Role / Device Role / Timing Role: Primary reference for bridge excitation and ADC conversion in isolated analog signal chains. Use Value: Low 250 nV/√Hz noise floor preserves SNR in microvolt-level bridge outputs without additional filtering. |
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 | 2.5-V adjustable shunt regulator with 2% initial tolerance, higher 0.2-Ω typical impedance, no dedicated ADJ pin for tempco trimming. | Lacks dedicated temperature coefficient adjustment; suited for cost-sensitive, non-critical references. | Select TL431ACDR only when ±2% tolerance and fixed tempco are acceptable; not recommended for metrology-grade designs. |
| REF3025AIDBZR | 2.5-V series reference with 0.2% initial tolerance, 50-µA quiescent current, and 30 ppm/°C max tempco - fundamentally different topology (series vs shunt). | Requires minimum load current; incompatible with shunt-based feedback configurations without redesign. | Choose REF3025AIDBZR only if system architecture permits series reference placement and lower drift is mandatory; not drop-in replaceable. |
Compared with LM336BDR-2-5, TL431ACDR offers lower cost but sacrifices trimmability and tempco control, while REF3025AIDBZR delivers superior accuracy and stability at the expense of topology compatibility and minimum load requirements.
Availability
LM336BDR-2-5 is available at Aetrix Electronics and suitable for digital multimeters, programmable power supplies, industrial sensor transmitters, and precision op-amp biasing circuits requiring stable component supply across production lifecycles.
Supply support for LM336BDR-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 LM336BDR-2-5 belongs to TI's precision shunt voltage reference product line, designed specifically for applications demanding stable, trimmable, low-drift references in commercial temperature environments.
FAQ
What is the operating temperature range for LM336BDR-2-5?
The LM336BDR-2-5 is characterized for operation from 0°C to 70°C ambient temperature. This commercial-grade specification distinguishes it from the wider-range LM236-2.5 (−25°C to 85°C) and makes it suitable for office, lab, and non-industrial equipment where thermal extremes are not expected. Full electrical performance-including reference voltage stability and dynamic impedance-is guaranteed within this range.
How does the ADJ pin on LM336BDR-2-5 function in practice?
The ADJ pin on LM336BDR-2-5 provides direct access to the internal reference node, enabling external trimming of both output voltage and temperature coefficient. By connecting resistors between ADJ and CATHODE or ANODE, designers can adjust the nominal reference to exactly 2.490 V and minimize drift over temperature. This capability is critical in metrology-grade instruments where factory calibration is required before shipment.
Can LM336BDR-2-5 be used as a negative voltage reference?
Yes, LM336BDR-2-5 can function as either a positive or negative voltage reference depending on circuit configuration. When the ANODE is grounded and CATHODE supplies +2.5 V to the load, it acts as a positive reference. Reversing connections-grounding CATHODE and sourcing current from ANODE-enables −2.5 V referencing. The SOIC-8 package supports both orientations without modification, provided current limits and thermal dissipation remain within spec.
What is the minimum cathode current required for LM336BDR-2-5 to regulate properly?
The LM336BDR-2-5 requires a minimum cathode current of 400 µA to maintain regulation within specified tolerance and impedance. Below this threshold, output voltage deviates significantly-up to 6 mV at 25°C-and dynamic impedance rises sharply. Designers must ensure that total load current plus any bleeder or feedback path current meets or exceeds 400 µA under all operating conditions, including startup and low-power states.
Is LM336BDR-2-5 RoHS compliant and lead-free?
Yes, LM336BDR-2-5 is RoHS compliant and features NiPdAu (NIPDAU) lead finish, meeting JEDEC Level-1 moisture sensitivity standards with unlimited peak reflow capability at 260°C. The part is manufactured in TI's qualified production lines and carries full environmental compliance documentation, including material declarations and substance restrictions reports available through TI's product folder.
LM336BDR-2-5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- ±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
LM336BDR-2-5 FAQ
1.How can I place an order for LM336BDR-2-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM336BDR-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 LM336BDR-2-5 reliable?
The price and inventory of LM336BDR-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 LM336BDR-2-5 is usually 5 days.
3.What payment methods are accepted for LM336BDR-2-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM336BDR-2-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM336BDR-2-5?
LM336BDR-2-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM336BDR-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 LM336BDR-2-5?
For technical support, including LM336BDR-2-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM336BDR-2-5 requirements.
6.How does Aetrix verify that LM336BDR-2-5 is sourced from the original manufacturer or authorized distributors?
All LM336BDR-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 LM336BDR-2-5 meets industry standards.
7.What is the process for return or replacement of LM336BDR-2-5?
All LM336BDR-2-5 units undergo pre-shipment inspection (PSI). If there is an issue with LM336BDR-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 LM336BDR-2-5 part is unused and in its original packaging.
Return procedure for LM336BDR-2-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM336BDR-2-5 Tags
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