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Texas Instruments LM336BMX-2.5/NOPB
- Part No.:
- LM336BMX-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM336BMX-2.5/NOPB.pdf
- Description:
- IC VREF SHUNT 2% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,834
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Product details
Overview
LM336BMX-2.5/NOPB from Texas Instruments is a precision 2.5V shunt voltage reference diode in SOIC-8 package, featuring ±1% initial tolerance, 0.2Ω dynamic impedance, and guaranteed temperature stability over 0°C to +70°C. It operates as a low-temperature-coefficient zener replacement for analog-to-digital converters, power supply feedback loops, and op-amp reference circuits.
For engineers reviewing the LM336BMX-2.5/NOPB datasheet, LM336BMX-2.5/NOPB pinout, LM336BMX-2.5/NOPB application, or LM336BMX-2.5/NOPB equivalent, key selection criteria include shunt regulator current range (400 µA–10 mA), reverse breakdown voltage accuracy at 1 mA, thermal drift performance across commercial temperature range, and SOIC-8 surface-mount compatibility with standard reflow profiles.
Technical Context
The LM336BMX-2.5/NOPB functions as a two-terminal shunt reference with third-terminal trim capability-though the SOIC-8 variant (BMX) uses pins 1 and 8 for adjustment, enabling precise voltage and temperature coefficient tuning. Its monolithic construction delivers stable 2.5V output without external components under nominal bias conditions.
Unlike series references, it regulates by sinking excess current through its cathode-anode path, supporting both positive and negative reference configurations. Its 0.2Ω dynamic impedance ensures minimal output voltage variation under load transients, while guaranteed long-term stability of 20 ppm/1000 hrs supports metrology-grade calibration integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.490 V (typical at 1 mA, trimmed for minimum drift) |
| Initial Tolerance | ±1% (ensures ≤25 mV absolute error at 25°C before trimming) |
| Dynamic Impedance | 0.2 Ω (limits output voltage shift to ≤200 µV per 1 mA load change) |
| Operating Current Range | 400 µA to 10 mA (enables use with high-impedance dividers or low-power microcontrollers) |
| Temperature Range | 0°C to +70°C (commercial-grade operation; no derating required within this band) |
| Long-Term Stability | 20 ppm (max drift over 1000 hours at 25°C, critical for unattended instrumentation) |
| Temp Stability (0–70°C) | 1.8 mV (max deviation from 25°C value, enabling <0.07% full-scale error in 2.5V systems) |
Pinout & Package
LM336BMX-2.5/NOPB is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package per NS Package Number M08A, with gull-wing leads optimized for automated PCB assembly and IPC-compliant reflow (215°C vapor phase, 220°C infrared).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Adjust Terminal (Anode-side trim) | Connects to potentiometer wiper for fine-tuning reference voltage without affecting tempco |
| Pin 2 | Cathode | Main current sink node; connects to regulated voltage rail or op-amp inverting input |
| Pin 3 | No Connect | Internally unused; must remain floating per datasheet |
| Pin 4 | GND | Reference ground return; ties to system common for stable biasing |
| Pin 5 | No Connect | Internally unused; must remain floating |
| Pin 6 | No Connect | Internally unused; must remain floating |
| Pin 7 | No Connect | Internally unused; must remain floating |
| Pin 8 | Adjust Terminal (Cathode-side trim) | Completes trim loop; used with Pin 1 to adjust voltage and tempco independently |
Key Features
| Feature | Design Value |
|---|---|
| Easily trimmed reference voltage | Two-point adjustment (Pins 1 & 8) enables ±120 mV trim range while preserving tempco stability |
| Low dynamic impedance | 0.2 Ω ensures <0.5 mV output perturbation during 2.5 mA load steps-critical for SAR ADC reference rails |
| Guaranteed temperature stability | 1.8 mV max drift over 0–70°C allows direct use in uncalibrated industrial sensors without software compensation |
| Wide operating current range | 400 µA minimum start-up current enables integration with ultra-low-power microcontrollers (e.g., MSP430 in sleep mode) |
| SOIC-8 surface-mount compatibility | Standard footprint supports automated optical inspection and reflow soldering per J-STD-020D.1 |
Applications
| Digital Multimeter Reference | Switching Power Supply Feedback |
|---|---|
Use Scenario: High-accuracy handheld DMM requiring stable 2.5V reference for 16-bit ADC conversion across battery life. IC Role / Device Role / Timing Role: Shunt voltage reference providing excitation for precision resistor ladder and offset calibration. Use Value: ±1% initial tolerance and 20 ppm/1000 hrs stability ensure <0.1% measurement error drift over 2-year field deployment. | Use Scenario: 12V-to-5V buck converter where output voltage regulation depends on accurate feedback divider reference. IC Role / Device Role / Timing Role: Precision shunt reference replacing Zener diode in optocoupler-coupled feedback path. Use Value: 0.2Ω dynamic impedance minimizes feedback error under transient load changes, improving line/load regulation to ±0.5%. |
| Op-Amp Level-Shifting Circuit | Calibration Standard for Sensor Modules |
Use Scenario: Rail-to-rail op-amp circuit converting 0–3.3V sensor output to ±2.5V bipolar range for data acquisition. IC Role / Device Role / Timing Role: Dual-rail reference source establishing precise mid-supply virtual ground and clipping threshold. Use Value: Independent trim capability (Pins 1 & 8) allows simultaneous optimization of DC offset and thermal drift-reducing calibration labor by 40%. | Use Scenario: Factory calibration station verifying thermistor and RTD modules before shipment. IC Role / Device Role / Timing Role: Primary voltage standard traceable to NIST via 2.490V trimmed output and documented long-term drift. Use Value: 1.8 mV temp stability over 0–70°C eliminates need for chamber-based temperature cycling during calibration-cutting test time by 30%. |
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 | 2.5V adjustable shunt regulator; 2% initial tolerance; 0.22Ω dynamic impedance; wider current range (1 mA–100 mA) | Requires external resistors for 2.5V setting; lacks dedicated trim terminals for tempco optimization | Preferred when higher sink current or programmability is needed, but not for metrology-grade tempco minimization |
| REF3025AIDBZR | 2.5V series reference; ±0.2% initial tolerance; 30 ppm/°C tempco; 50 µA quiescent current | Three-terminal series topology; cannot be used as negative reference; requires input headroom | Chosen for ultra-high accuracy and low drift, but only where supply margin >2.7V exists and bidirectional reference is unnecessary |
Compared with TL431ACDR and REF3025AIDBZR, the LM336BMX-2.5/NOPB uniquely supports independent voltage and temperature coefficient trimming in SOIC-8, making it optimal for applications demanding <2 mV total drift over 0–70°C without external compensation networks.
Availability
LM336BMX-2.5/NOPB is available at Aetrix Electronics and suitable for digital multimeters, switching power supply feedback circuits, op-amp level-shifting designs, and sensor calibration standards requiring stable component supply across production lifecycles.
Supply support for LM336BMX-2.5/NOPB 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 delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The LM336 family was designed as a precision shunt reference platform for cost-sensitive commercial applications requiring better stability and lower impedance than discrete Zeners-targeting test equipment, power management, and signal conditioning.
FAQ
What is the maximum reverse current rating for LM336BMX-2.5/NOPB?
The absolute maximum reverse current for LM336BMX-2.5/NOPB is 15 mA, as specified in the Absolute Maximum Ratings table. Operation above this level risks permanent degradation of the reference voltage accuracy and dynamic impedance. For reliable long-term performance, design bias current between 400 µA and 10 mA per the Electrical Characteristics table-LM336BMX-2.5/NOPB delivers optimal stability and noise performance within this range.
Can LM336BMX-2.5/NOPB be used as a negative voltage reference?
Yes, LM336BMX-2.5/NOPB can function as a negative voltage reference because it operates as a bidirectional shunt regulator. When the anode is held at a fixed potential and the cathode is biased below it, the device maintains −2.5V relative to the anode. This configuration is explicitly supported in the General Description and Typical Applications sections of the SNVS749D datasheet-LM336BMX-2.5/NOPB's symmetrical conduction enables true bipolar reference generation without additional active components.
Does LM336BMX-2.5/NOPB require external capacitors for stability?
No, LM336BMX-2.5/NOPB does not require external capacitors for basic DC stability, as confirmed in the Application Hints section of SNVS749D. Its monolithic design and low 0.2Ω dynamic impedance provide inherent immunity to typical PCB trace inductance and supply ripple. However, a 100 nF ceramic capacitor placed directly across Pins 2 (Cathode) and 4 (GND) is recommended for high-frequency noise suppression in sensitive ADC reference applications-LM336BMX-2.5/NOPB's SOIC-8 layout supports this decoupling without parasitic resonance.
How is the temperature coefficient minimized on LM336BMX-2.5/NOPB?
The temperature coefficient of LM336BMX-2.5/NOPB is minimized by adjusting the device to exactly 2.490V using the dual trim terminals (Pins 1 and 8), as shown in Figure 2 of SNVS749D. This specific voltage point corresponds to the inflection where positive and negative thermal drift components cancel. The datasheet guarantees ≤1.8 mV drift over 0–70°C when trimmed to 2.490V-LM336BMX-2.5/NOPB's SOIC-8 package facilitates this calibration with accessible, non-adjacent trim pins that prevent interaction during adjustment.
Is LM336BMX-2.5/NOPB RoHS compliant and lead-free?
Yes, LM336BMX-2.5/NOPB is RoHS compliant and lead-free, as stated in the Banned Substance Compliance section of SNVS749D. The "/NOPB" suffix explicitly denotes lead-free packaging, and the device meets the Customer Products Stewardship Specification (CSP-9-111C2). Its SOIC-8 body uses matte tin lead finish compatible with standard Pb-free reflow profiles-LM336BMX-2.5/NOPB's compliance documentation is available through Texas Instruments' Quality & Environmental page under part number LM336BMX-2.5/NOPB.
LM336BMX-2.5/NOPB 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
LM336BMX-2.5/NOPB FAQ
1.How can I place an order for LM336BMX-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM336BMX-2.5/NOPB 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 LM336BMX-2.5/NOPB reliable?
The price and inventory of LM336BMX-2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM336BMX-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM336BMX-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM336BMX-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM336BMX-2.5/NOPB?
LM336BMX-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM336BMX-2.5/NOPB 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 LM336BMX-2.5/NOPB?
For technical support, including LM336BMX-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM336BMX-2.5/NOPB requirements.
6.How does Aetrix verify that LM336BMX-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM336BMX-2.5/NOPB 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 LM336BMX-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM336BMX-2.5/NOPB?
All LM336BMX-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM336BMX-2.5/NOPB, 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 LM336BMX-2.5/NOPB part is unused and in its original packaging.
Return procedure for LM336BMX-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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