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Texas Instruments LM336M-2.5/NOPB
- Part No.:
- LM336M-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM336M-2.5/NOPB.pdf
- Description:
- IC VREF SHUNT 4% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,177
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Product details
Overview
LM336M-2.5/NOPB from Texas Instruments is a precision 2.5V shunt voltage reference diode in SOIC-8 package, featuring 0.2 Ω dynamic impedance, ±1% initial tolerance (LM336B variant), and guaranteed operation from 0°C to +70°C. It functions as a low-temperature-coefficient zener replacement in analog front-ends, ADC/DAC biasing, and 5V-supply-derived references.
For engineers reviewing the LM336M-2.5/NOPB datasheet, LM336M-2.5/NOPB pinout, LM336M-2.5/NOPB application, or LM336M-2.5/NOPB equivalent, key selection criteria include temperature stability over 0°C–70°C, trimmable reference voltage via external potentiometer, dynamic impedance under 1 Ω, and SOIC-8 surface-mount compatibility for space-constrained PCBs.
Technical Context
The LM336M-2.5/NOPB operates as a two-terminal shunt regulator with third-terminal trimming capability-pin 1 enables adjustment of reference voltage and temperature coefficient independently. Its monolithic construction integrates a precision bandgap-like reference core with low-noise zener emulation.
It delivers stable 2.490 V nominal output when trimmed, supports 400 µA–10 mA operating current, and maintains ≤10 mV total drift across 0°C–70°C per design limits. Dynamic impedance remains ≤1 Ω at 1 mA, enabling fast transient response in feedback loops and high-PSRR reference buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Voltage | 2.5 V - precise reference point for ADC calibration and op-amp offset nulling |
| Initial Tolerance | ±1% (LM336B grade) - ensures <±25 mV absolute error at 25°C without trimming |
| Dynamic Impedance | 0.2 Ω typical - minimizes load-induced voltage shift in varying-current applications |
| Operating Current | 400 µA to 10 mA - supports ultra-low-power sensor nodes and high-accuracy power supply monitors |
| Temp Range | 0°C to +70°C - validated for commercial-grade embedded systems and industrial control panels |
| Long-Term Stability | 20 ppm/1000 hrs - critical for metrology-grade instruments requiring minimal drift over time |
Pinout & Package
LM336M-2.5/NOPB uses an 8-pin SOIC (NS M08A / JEDEC MS-012) package with gull-wing leads. Pin 1 is the adjust terminal; pins 2 and 3 are cathode/anode (shunt configuration); remaining pins are NC or internal test points per die layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Adjust | Connects to external potentiometer for trimming reference voltage and temperature coefficient independently |
| Pin 2 | Cathode | Main current sink node; connects to regulated voltage rail or op-amp inverting input |
| Pin 3 | Anode | Reference ground return; must be tied to system ground with low-inductance path |
| Pins 4–8 | No Connect | Internally unused; left floating or grounded per layout best practices to reduce noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Trimmed temperature coefficient | Minimized to <±70 µV/°C when adjusted to 2.490 V using Figure 2 circuit |
| Low-noise operation | Zener noise voltage < 40 µVRMS (10 Hz–10 kHz) - suitable for high-resolution data acquisition |
| Wide current compliance | Stable regulation across 400 µA–10 mA - eliminates need for current-setting resistor recalibration |
| Fast turn-on response | <10 µs rise time - supports pulsed reference activation in battery-powered wake-up circuits |
Applications
| Digital Multimeter Reference | 5V-Supply Buffered Reference |
|---|---|
|
Use Scenario: High-accuracy handheld DMM requiring stable 2.5V reference for 16-bit ADC conversion. IC Role / Device Role / Timing Role: Shunt voltage reference providing excitation and scaling for successive-approximation register (SAR) ADC. Use Value: ±1% initial tolerance and <10 mV temp drift over 0°C–70°C ensure <0.05% full-scale error without factory calibration. |
Use Scenario: Industrial PLC I/O module deriving precision analog outputs from 5V logic rail. IC Role / Device Role / Timing Role: Low-impedance 2.5V reference source for op-amp-based DAC output buffers. Use Value: 0.2 Ω dynamic impedance prevents loading-induced droop during 0–10V output slewing. |
| Op-Amp Offset Nulling | Linear Ohmmeter Circuit |
|
Use Scenario: Precision instrumentation amplifier with adjustable DC offset compensation. IC Role / Device Role / Timing Role: Trimmed 2.490V reference feeding summing junction to cancel input stage mismatch. Use Value: Independent trim of voltage and tempco allows simultaneous optimization of null accuracy and thermal stability. |
Use Scenario: Portable resistance tester using constant-current source and ratiometric measurement. IC Role / Device Role / Timing Role: Stable reference for current-setting resistor and ADC reference in four-wire ohms mode. Use Value: 20 ppm/1000 hrs long-term stability ensures <0.1% resistance reading drift over 1-year field deployment. |
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 2.5V reference; 2.5V fixed mode requires external resistors; 0.22Ω impedance; −40°C to +85°C | Requires external resistor network for 2.5V setting; no dedicated trim pin; higher min cathode current (1 mA) | Choose TL431ACDR for cost-sensitive designs where trim flexibility is unnecessary and wider temp range is required. |
| REF3025AIDBZR | Series reference; 2.5V output; 50 ppm/°C tempco; 220 µA quiescent; SOT-23-3 package | Three-terminal series topology; cannot operate as negative reference; lower max current (25 mA) | Choose REF3025AIDBZR when low quiescent current and small footprint outweigh shunt topology benefits like bidirectional polarity use. |
Compared with TL431ACDR and REF3025AIDBZR, the LM336M-2.5/NOPB uniquely supports true bipolar reference use (positive/negative configurations), offers dedicated pin-1 trimming for simultaneous voltage and tempco optimization, and delivers superior dynamic impedance (0.2 Ω vs. 0.22 Ω/2 Ω) for high-PSRR analog signal chains.
Availability
LM336M-2.5/NOPB is available at Aetrix Electronics and suitable for digital multimeters, PLC analog I/O modules, precision op-amp offset nulling circuits, and portable ohmmeters requiring stable component supply with commercial-temperature-grade performance and SOIC-8 mountability.
Supply support for LM336M-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, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.
The LM336 series belongs to TI's precision voltage reference product line, designed specifically for applications demanding stable, trimmable, low-drift shunt references in commercial-temperature environments with surface-mount constraints.
FAQ
What is the exact pin configuration of LM336M-2.5/NOPB?
The LM336M-2.5/NOPB uses an SOIC-8 package with pin 1 as Adjust, pin 2 as Cathode, pin 3 as Anode, and pins 4–8 as No Connect. This matches National Semiconductor's M08A mechanical drawing and is confirmed in the SNVS749D datasheet connection diagram for SO-package variants including LM336M-2.5.
Does LM336M-2.5/NOPB support negative voltage referencing?
Yes, the LM336M-2.5/NOPB operates as a shunt regulator and can be used as either a positive or negative voltage reference. When the anode is held at a potential higher than the cathode, it functions as a negative reference-enabling dual-supply op-amp biasing and inverted ADC reference topologies without additional level-shifting circuitry.
What is the minimum operating current for LM336M-2.5/NOPB?
The LM336M-2.5/NOPB guarantees regulation down to 400 µA, as specified in the Electrical Characteristics table under "Reverse Breakdown Change With Current" condition (400 µA ≤ IR ≤ 10 mA). Below this, reference voltage may deviate beyond ±1% tolerance and dynamic impedance rises significantly.
Can LM336M-2.5/NOPB be trimmed to exactly 2.490 V?
Yes-the LM336M-2.5/NOPB datasheet explicitly states that adjusting to 2.490 V minimizes temperature coefficient (Figure 2). Using a 10 kΩ potentiometer with two series silicon diodes (e.g., 1N4148), the trim range is typically ±70 mV, allowing precise 2.490 V setting for optimal thermal stability across 0°C–70°C.
Is LM336M-2.5/NOPB RoHS compliant and lead-free?
Yes, LM336M-2.5/NOPB is marked /NOPB, indicating lead-free (Pb-free) packaging and RoHS compliance per TI's Banned Substances Specification CSP-9-111S2. The device meets EU RoHS Directive 2011/65/EU requirements and carries appropriate marking on reel labels and shipping documentation.
LM336M-2.5/NOPB 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:
- ±4%
- 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
LM336M-2.5/NOPB FAQ
1.How can I place an order for LM336M-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM336M-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 LM336M-2.5/NOPB reliable?
The price and inventory of LM336M-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 LM336M-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM336M-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM336M-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM336M-2.5/NOPB?
LM336M-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM336M-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 LM336M-2.5/NOPB?
For technical support, including LM336M-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM336M-2.5/NOPB requirements.
6.How does Aetrix verify that LM336M-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM336M-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 LM336M-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM336M-2.5/NOPB?
All LM336M-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM336M-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 LM336M-2.5/NOPB part is unused and in its original packaging.
Return procedure for LM336M-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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