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Texas Instruments LM336BDG4-2-5
- Part No.:
- LM336BDG4-2-5
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM336BDG4-2-5.pdf
- Description:
- IC VREF SHUNT 2% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:138
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Product details
Overview
LM336BDG4-2-5 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 1.8 mV over 0°C to 70°C. It operates as a low-temperature-coefficient Zener-equivalent reference for analog-to-digital converters, power supply feedback loops, and instrumentation amplifier biasing.
For engineers reviewing the LM336BDG4-2-5 datasheet, LM336BDG4-2-5 pinout, LM336BDG4-2-5 application, or LM336BDG4-2-5 equivalent, key selection criteria include its trimmable ADJ terminal for drift minimization, 400 µA to 10 mA operating current range, fast turn-on response, and compatibility with 5-V logic-derived reference generation.
Technical Context
The LM336BDG4-2-5 implements an integrated bandgap-derived shunt regulator architecture with a dedicated ADJ pin enabling external trimming of both output voltage and temperature coefficient. Its internal circuitry includes precision resistive dividers, matched transistor pairs, and low-noise bias networks optimized for stable 2.5-V regulation under varying load and thermal conditions.
Unlike fixed-terminal Zeners, this device uses a three-terminal configuration (CATHODE, ANODE, ADJ) to decouple reference voltage setting from temperature compensation tuning. The 0.27-Ω dynamic impedance ensures minimal output variation across its 400 µA–10 mA operating current range, while the 20 ppm/khr long-term stability supports metrology-grade applications.
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 rails without level-shifting. |
| Initial Tolerance | ±1% at 25°C; reduces calibration overhead in production test for ADC reference circuits. |
| Temp Stability | 1.8 mV over 0°C to 70°C; supports stable operation in commercial-temperature industrial controllers. |
| Dynamic Impedance | 0.27 Ω at 1 mA and 1 kHz; maintains <0.3 mV output shift per 1 mA load change in precision feedback paths. |
| Operating Current | 400 µA to 10 mA; allows use with high-value bias resistors in low-power sensor interfaces. |
| Long-Term Drift | 20 ppm/khr; ensures <0.05% reference degradation over 5 years in uncalibrated embedded systems. |
| Noise Density | 250 nV/√Hz at 10 Hz; suitable for 16-bit SAR ADC references without additional filtering. |
Pinout & Package
LM336BDG4-2-5 is housed in an 8-pin SOIC (D) package with 1.27-mm lead pitch and 1.75-mm maximum height, compliant with JEDEC MS-012AA and RoHS requirements. Thermal resistance θJA is 97°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 5, 6, 7 | NC | No internal connection; electrically isolated and may be left floating or grounded per layout best practice. |
| 4 | ANODE | Current sink node for shunt operation; connects to system ground when used as positive reference. |
| 8 | CATHODE | Regulated 2.5-V output node; supplies reference voltage to downstream circuitry. |
| ADJ (Pin 3) | Adjust | Trimmable terminal for fine-tuning reference voltage and minimizing temperature coefficient via external resistor network. |
Key Features
| Feature | Design Value |
|---|---|
| Trimmed temperature coefficient | Enables <±50 ppm/°C drift after adjustment, critical for battery-powered portable instruments. |
| Low dynamic impedance | 0.27 Ω ensures <2.7 mV error under 10 mA load transients-essential for switching power supply feedback. |
| Wide operating current range | 400 µA–10 mA supports both ultra-low-power IoT sensor nodes and high-current DAC reference buffers. |
| Fast turn-on time | Stabilizes within microseconds, allowing use in wake-up-triggered measurement cycles without delay penalties. |
| 2.5-V output from 5-V rail | Eliminates need for dedicated LDO or charge pump when deriving precision reference from standard logic supplies. |
Applications
| Digital Multimeter Reference | Programmable Logic Controller Analog Input |
|---|---|
Use Scenario: High-accuracy DC voltage measurement using 24-bit delta-sigma ADC with auto-ranging. IC Role / Device Role / Timing Role: Primary 2.5-V reference for ADC internal PGA and external signal conditioning. Use Value: ±1% initial tolerance and 1.8 mV temp drift ensure <0.02% full-scale error across operating temperature without recalibration. | Use Scenario: Isolated 4–20 mA current loop transmitter with microcontroller-based calibration. IC Role / Device Role / Timing Role: Stable reference for DAC output scaling and current sense amplifier gain setting. Use Value: 0.27-Ω dynamic impedance prevents loop gain variation during field-device load changes. |
| Industrial Temperature Sensor Interface | Medical ECG Signal Conditioning |
Use Scenario: RTD bridge excitation and cold-junction compensation in HVAC control modules. IC Role / Device Role / Timing Role: Precision excitation source and ADC reference in dual-role configuration. Use Value: Trimmable ADJ pin allows simultaneous optimization of bridge excitation stability and ADC reference accuracy. | Use Scenario: Low-noise front-end for 12-lead ECG acquisition with 16-bit resolution. IC Role / Device Role / Timing Role: Reference for instrumentation amplifier common-mode bias and ADC conversion. Use Value: 250 nV/√Hz noise density avoids degrading input-referred noise floor below 1 µV RMS. |
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; 0.22-Ω dynamic impedance; wider 1–100 mA current range; no ADJ pin for temp coefficient tuning. | Lacks trimmable temperature coefficient; suited for general-purpose feedback but not metrology-grade drift-critical designs. | Select TL431ACDR when cost sensitivity outweighs long-term drift requirements and ADJ-based trimming is unnecessary. |
| REF5025AIDR | 2.5-V series voltage reference; 3-ppm/°C max tempco; 0.008% initial accuracy; 3.3-V min input; higher quiescent current (950 µA). | Series topology requires minimum headroom; incompatible with shunt-based 5-V rail derivation; superior stability but higher BOM cost. | Choose REF5025AIDR only when sub-10 ppm/°C tempco and <0.01% accuracy justify added complexity and cost. |
Compared with TL431ACDR and REF5025AIDR, the LM336BDG4-2-5 uniquely balances trimmable temperature stability, 5-V-rail compatibility, and ultra-low dynamic impedance-making it optimal for cost-constrained commercial industrial systems requiring calibrated 2.5-V references without external trimming components.
Availability
LM336BDG4-2-5 is available at Aetrix Electronics and suitable for digital multimeters, programmable logic controller analog inputs, and industrial temperature sensor interfaces requiring stable component supply across multi-year production cycles.
Supply support for LM336BDG4-2-5 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 specializing in analog and embedded processing technologies, with leadership in precision analog ICs and industrial-grade reference solutions.
The LM336 family was designed specifically for commercial-temperature applications demanding stable, trimmable 2.5-V shunt references in compact surface-mount packages-targeting instrumentation, power management, and data acquisition systems.
FAQ
What is the operating temperature range of the LM336BDG4-2-5?
The LM336BDG4-2-5 is characterized for operation from 0°C to 70°C, matching the LM336B-2.5 grade specification. This commercial temperature range supports deployment in indoor industrial controls, test equipment, and consumer-grade instrumentation where ambient conditions remain within these limits. The device's 1.8 mV total drift over this span reflects its specified temperature stability performance.
How does the ADJ pin on the LM336BDG4-2-5 function in circuit design?
The ADJ pin on the LM336BDG4-2-5 provides direct access to the internal voltage divider node, enabling external trimming of both output voltage and temperature coefficient. By connecting a potentiometer between CATHODE and ADJ, designers can nullify unit-to-unit variations and minimize drift across temperature-critical for achieving <±50 ppm/°C performance in calibrated systems without factory trimming.
Can the LM336BDG4-2-5 be used as a negative voltage reference?
Yes, the LM336BDG4-2-5 can operate as a negative voltage reference by reversing its polarity: connect CATHODE to system ground and ANODE to the negative rail. In this configuration, the regulated 2.5-V drop appears across the device with respect to ground, providing a stable negative reference for op-amp level-shifting or dual-supply sensor interfaces-leveraging its bidirectional shunt capability as stated in the official TI datasheet.
What is the maximum reverse current rating for the LM336BDG4-2-5?
The absolute maximum reverse current rating for the LM336BDG4-2-5 is 20 mA, as defined in the TI SLVS063E datasheet. Exceeding this value risks permanent damage. For reliable operation, the recommended operating current remains within 400 µA to 10 mA-ensuring optimal dynamic impedance, thermal stability, and long-term drift performance while maintaining margin below the absolute limit.
Is the LM336BDG4-2-5 RoHS compliant and what is its lead finish?
Yes, the LM336BDG4-2-5 is RoHS compliant with NIPDAU (nickel-palladium-gold) lead finish, as confirmed in TI's Package Option Addendum. This finish supports standard Pb-free reflow profiles (Level-1-260°C-UNLIM) and ensures solderability and corrosion resistance in automated assembly processes-critical for high-reliability commercial electronics manufacturing.
LM336BDG4-2-5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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
LM336BDG4-2-5 FAQ
1.How can I place an order for LM336BDG4-2-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM336BDG4-2-5 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 LM336BDG4-2-5 reliable?
The price and inventory of LM336BDG4-2-5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM336BDG4-2-5 is usually 5 days.
3.What payment methods are accepted for LM336BDG4-2-5?
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4.How is shipping managed for LM336BDG4-2-5?
LM336BDG4-2-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM336BDG4-2-5 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 LM336BDG4-2-5?
For technical support, including LM336BDG4-2-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM336BDG4-2-5 requirements.
6.How does Aetrix verify that LM336BDG4-2-5 is sourced from the original manufacturer or authorized distributors?
All LM336BDG4-2-5 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 LM336BDG4-2-5 meets industry standards.
7.What is the process for return or replacement of LM336BDG4-2-5?
All LM336BDG4-2-5 units undergo pre-shipment inspection (PSI). If there is an issue with LM336BDG4-2-5, 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 LM336BDG4-2-5 part is unused and in its original packaging.
Return procedure for LM336BDG4-2-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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