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Texas Instruments LM336BMX-2.5
- Part No.:
- LM336BMX-2.5
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM336BMX-2.5.pdf
- Description:
- IC VREF SHUNT 2% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,793
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Product details
Overview
LM336BMX-2.5 from Texas Instruments (formerly National Semiconductor) is a precision 2.5V shunt voltage reference diode in SOIC-8 package, operating as a low-temperature-coefficient zener with 0.2Ω dynamic impedance, ±1% initial tolerance, and guaranteed stability over 0°C to +70°C. It serves as a stable 2.5V reference for analog-to-digital converters, power supply feedback loops, and op-amp biasing circuits powered from 5V logic rails.
For engineers reviewing the LM336BMX-2.5 datasheet, LM336BMX-2.5 pinout, LM336BMX-2.5 application, or LM336BMX-2.5 equivalent, this page delivers verified electrical parameters, package mapping, trim-capable terminal configuration, temperature-stability behavior, and direct alternatives for industrial-grade analog reference design.
Technical Context
The LM336BMX-2.5 implements a monolithic shunt-reference architecture with a third terminal enabling external adjustment of reference voltage and temperature coefficient. Its operation requires a series current-limiting resistor and functions bidirectionally - usable as either positive or negative reference depending on circuit polarity.
It delivers 2.490V nominal output at 1mA reverse current, exhibits ≤10mV total drift across 0°C–70°C when trimmed, and maintains ≤1Ω dynamic impedance up to 10mA operating current. The SOIC-8 package supports surface-mount reflow with 215°C vapor-phase soldering profile.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.490 V (nominal at 1 mA, ±1% initial tolerance) |
| Temperature Range | 0°C to +70°C (guaranteed performance envelope) |
| Dynamic Impedance | 0.2 Ω (ensures minimal output variation under load transients) |
| Operating Current | 400 µA to 10 mA (supports low-power sensor interfaces and high-accuracy regulators) |
| Temp Stability (0–70°C) | ≤6 mV (after trimming to 2.490V; enables <10 ppm/°C effective TC) |
| Long-Term Stability | 20 ppm (1000-hour drift at 25°C; critical for calibration-critical systems) |
Pinout & Package
LM336BMX-2.5 is housed in an SOIC-8 (NS M08A) surface-mount package with gull-wing leads. Pin 1 is marked by a beveled corner; the device uses three active terminals: Anode (Pin 1), Cathode (Pin 8), and Adjust (Pin 2). Pins 3–7 are NC (no connect) and internally unconnected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Current sink input | Connects to ground or negative rail; sets reference polarity |
| Pin 2 (Adjust) | Trim control node | Enables external adjustment of VREF and temperature coefficient via potentiometer |
| Pin 8 (Cathode) | Reference output | Delivers regulated 2.5V relative to Anode; connects to load or feedback node |
Key Features
| Feature | Design Value |
|---|---|
| Third-terminal trim capability | Allows independent optimization of reference voltage and temperature coefficient without cross-coupling |
| Low dynamic impedance | 0.2Ω ensures <0.2mV output shift per 1mA load change - essential for high-resolution ADC references |
| Wide operating current range | 400µA–10mA accommodates both ultra-low-power IoT sensors and high-precision industrial regulators |
| Guaranteed temp stability | ≤6mV over 0°C–70°C (when adjusted to 2.490V) meets Class I instrumentation requirements |
| SOIC-8 surface-mount compatibility | Enables automated assembly and thermal coupling to PCB copper for improved thermal stability |
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-operated temperature ranges. IC Role / Device Role / Timing Role: Shunt voltage reference providing excitation and scaling reference for successive-approximation ADC front-end. Use Value: ±1% initial tolerance and ≤6mV temp drift ensure <0.05% full-scale error without factory calibration. |
Use Scenario: 5V-output buck converter using optocoupler-isolated feedback where reference stability directly impacts output regulation accuracy. IC Role / Device Role / Timing Role: Precision shunt reference generating error signal for TL431-like feedback loop with isolated secondary-side sensing. Use Value: 0.2Ω dynamic impedance minimizes noise injection into feedback path, improving transient response and reducing output ripple. |
| Op-Amp Precision Biasing | Calibration Equipment Reference |
|
Use Scenario: Rail-to-rail op-amp circuit in data acquisition system requiring matched dual-supply bias at exactly 2.5V for zero-input offset nulling. IC Role / Device Role / Timing Role: Stable DC reference source for op-amp common-mode voltage setting and offset trimming networks. Use Value: Third-terminal adjust allows fine-tuning to 2.490V, minimizing temperature-induced offset drift in high-gain amplifier stages. |
Use Scenario: Portable calibration standard used to verify benchtop multimeters and process calibrators in field service environments. IC Role / Device Role / Timing Role: Primary 2.5V reference element in traceable voltage standard module with manual trim and thermal stabilization. Use Value: 20 ppm long-term stability over 1000 hours ensures calibration validity between annual metrology lab recertifications. |
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 | 2.495V nominal, adjustable via resistive divider; no dedicated trim pin; 0.22Ω impedance; SOIC-8 | Requires external resistors for 2.5V setting; lacks independent temp-coefficient tuning; higher quiescent current | Preferred when fixed 2.5V isn't mandatory and cost sensitivity outweighs trim flexibility |
| REF3025AIDBZR | 2.500V nominal, 50ppm/°C max TC, 100µA typical IQ, SOT-23-3, no trim pin | Lower power, smaller footprint, but no adjustment capability; tighter TC spec but not trimmable | Best for space-constrained, battery-powered designs where factory-trimmed accuracy suffices |
Compared with TL431ACDR and REF3025AIDBZR, the LM336BMX-2.5 uniquely supports post-manufacture optimization of both voltage and temperature coefficient - critical for systems requiring field recalibration or thermal gradient compensation without hardware revision.
Availability
LM336BMX-2.5 is available at Aetrix Electronics and suitable for digital multimeters, switching power supplies, op-amp biasing circuits, and portable calibration equipment requiring stable component supply with guaranteed 0°C to +70°C performance.
Supply support for LM336BMX-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 (TI) is a global semiconductor leader delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, longevity, and industrial-grade qualification.
The LM336 family was designed specifically for precision analog reference applications demanding trimmable voltage and temperature coefficient - targeting test equipment, industrial controls, and high-fidelity signal conditioning.
FAQ
What is the exact pin configuration of LM336BMX-2.5?
The LM336BMX-2.5 uses an SOIC-8 package with Pin 1 as Anode (ground reference), Pin 2 as Adjust (trim control), and Pin 8 as Cathode (2.5V output). Pins 3–7 are no-connect and must remain unconnected in layout. This configuration matches NS Package Number M08A and is confirmed in the SNVS749D datasheet Figure 3.
Does LM336BMX-2.5 require external components to operate?
Yes - LM336BMX-2.5 requires a series current-setting resistor between the cathode and supply rail to establish its operating current (400 µA–10 mA). When using the Adjust pin for trimming, a potentiometer and optional compensation diodes (e.g., 1N4148) are needed per Figure 2 in SNVS749D. No capacitors are mandatory but may be added for noise filtering.
Can LM336BMX-2.5 be used as a negative reference?
Yes - LM336BMX-2.5 operates as a bidirectional shunt reference. By reversing polarity - connecting Cathode to ground and Anode to a negative supply - it delivers −2.5V relative to ground. This mode is explicitly supported in the General Description and Typical Applications section of SNVS749D.
What is the maximum power dissipation for LM336BMX-2.5 in SOIC-8?
With θJA = 165°C/W and TJ(MAX) = 100°C (per datasheet Note 2), LM336BMX-2.5 supports up to 303 mW at 25°C ambient. At 70°C ambient, derated power drops to ~182 mW. This assumes standard JEDEC 2-layer board layout; actual dissipation depends on PCB copper area and airflow.
Is LM336BMX-2.5 RoHS compliant and lead-free?
Yes - LM336BMX-2.5 is RoHS compliant and lead-free, consistent with TI's Banned Substances Compliance policy (CSP-9-111S2) and stated in the datasheet's "BANNED SUBSTANCE COMPLIANCE" section. The SOIC-8 package uses matte tin lead finish and meets JEDEC J-STD-020 moisture sensitivity level 3.
LM336BMX-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:
- Not For New Designs
- 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 FAQ
1.How can I place an order for LM336BMX-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM336BMX-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 LM336BMX-2.5 reliable?
The price and inventory of LM336BMX-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 LM336BMX-2.5 is usually 5 days.
3.What payment methods are accepted for LM336BMX-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM336BMX-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM336BMX-2.5?
LM336BMX-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM336BMX-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 LM336BMX-2.5?
For technical support, including LM336BMX-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM336BMX-2.5 requirements.
6.How does Aetrix verify that LM336BMX-2.5 is sourced from the original manufacturer or authorized distributors?
All LM336BMX-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 LM336BMX-2.5 meets industry standards.
7.What is the process for return or replacement of LM336BMX-2.5?
All LM336BMX-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with LM336BMX-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 LM336BMX-2.5 part is unused and in its original packaging.
Return procedure for LM336BMX-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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