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Texas Instruments LM4050CEM3X-2.5/NOPB
- Part No.:
- LM4050CEM3X-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050CEM3X-2.5/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,846
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Product details
Overview
LM4050CEM3X-2.5/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 2.5 V reverse breakdown voltage with ±13 mV (±0.5%) initial tolerance at 25°C, 41 μVrms wideband noise (10 Hz–10 kHz), and 50 ppm/°C max temperature coefficient across −40°C to 125°C. It operates from 65 μA to 15 mA and requires no output capacitor, supporting space-constrained data acquisition and portable instrumentation.
For engineers reviewing the LM4050CEM3X-2.5/NOPB datasheet, LM4050CEM3X-2.5/NOPB pinout, LM4050CEM3X-2.5/NOPB application, or LM4050CEM3X-2.5/NOPB equivalent, key selection criteria include its C-grade 2.5 V reference accuracy, SOT-23 thermal performance (RθJA = 287°C/W), industrial/extended temperature operation, and shunt topology compatibility with low-current bias networks and ADC reference buffers.
Technical Context
The LM4050CEM3X-2.5/NOPB uses bandgap-based Zener-zap trimmed shunt regulation with curvature-corrected temperature drift compensation, enabling stable 2.5 V reference generation without external capacitors. Its dynamic impedance remains ≤0.3 Ω at 1 mA, ensuring minimal load-induced voltage shift across 65 μA–15 mA operating current.
Designed for high-accuracy analog signal chains, it features fuse-trimmed initial tolerance (C grade: ±0.5%), low long-term drift (120 ppm over 1000 hrs), and robust ESD resilience (±2000 V HBM). The device maintains specified performance across both industrial (−40°C to 85°C) and extended (−40°C to 125°C) temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V nominal; fixed reverse breakdown voltage for precision biasing and ADC/DAC reference |
| Initial Tolerance (25°C) | ±13 mV (±0.5%); C-grade accuracy suitable for mid-tier instrumentation and energy metering |
| Temperature Coefficient | ≤50 ppm/°C max over −40°C to 125°C; ensures <±1.3 mV total drift across full range |
| Operating Current Range | 65 μA to 15 mA; supports ultra-low-power sensor nodes and high-current reference buffering |
| Wideband Noise (10 Hz–10 kHz) | 41 μVrms; enables sub-16-bit ADC accuracy without additional filtering |
| Dynamic Impedance | 0.3 Ω at 1 mA; minimizes load-regulation error in varying-current applications |
| Long-Term Stability | 120 ppm over 1000 hrs; reduces calibration frequency in field-deployed equipment |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, surface-mount compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | I/O | Shunt current path and input voltage node; connects to supply rail via series resistor |
| Anode (Pin 2) | O | Reference ground node; must be connected to system ground for stable regulation |
| NC (Pin 3) | - | No internal connection; left floating per datasheet; not used in layout |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct integration into compact PCB layouts without stability-compensation components |
| Tolerates capacitive loads | Stable operation with up to 10 nF bypass capacitance on cathode, simplifying noise filtering |
| Fixed 2.5 V reverse breakdown | Eliminates external resistor divider; reduces BOM count and layout sensitivity |
| Low 41 μVrms noise | Supports 16-bit SAR ADCs without post-regulation filtering in battery-powered systems |
| Extended temperature range | Rated for −40°C to 125°C operation, suitable for automotive under-hood and industrial control environments |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeters and portable oscilloscopes requiring stable, low-power reference sources. IC Role / Device Role / Timing Role: Shunt voltage reference providing excitation and scaling for analog front-end signal conditioning. Use Value: 65 μA minimum operating current extends battery life; ±13 mV tolerance ensures calibrated measurement accuracy without frequent recalibration. |
Use Scenario: Modular DAQ modules in factory automation collecting sensor data from thermocouples and strain gauges. IC Role / Device Role / Timing Role: Precision reference for 16-bit sigma-delta ADCs, establishing absolute voltage scale for digitized inputs. Use Value: 41 μVrms noise and 50 ppm/°C TC enable <±0.01% full-scale error across ambient temperature swings. |
| Energy Management Systems | Automotive Body Control Modules |
Use Scenario: Smart electricity meters monitoring grid voltage and current with metrology-grade accuracy. IC Role / Device Role / Timing Role: Reference source for isolated ADCs measuring AC mains parameters in Class 0.2 metering designs. Use Value: 120 ppm long-term stability reduces annual calibration drift; extended temperature rating supports outdoor enclosure mounting. |
Use Scenario: Under-dash BCMs monitoring battery voltage, cabin sensors, and lighting drivers in harsh thermal environments. IC Role / Device Role / Timing Role: Stable 2.5 V reference for microcontroller ADCs and analog comparators in AEC-Q100-compliant systems. Use Value: −40°C to 125°C operation and ±2000 V HBM ESD rating ensure reliability in automotive electrical systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431CDBZR | Adjustable 2.495 V reference; higher 2 mA min cathode current; 0.2 Ω typical Zz | Requires external resistor network for 2.5 V setting; less accurate out-of-box | Select when adjustable output or higher current drive is needed; verify layout stability with external resistors |
| REF3025AIDBZR | 2.5 V series reference; 50 μA quiescent current; 30 ppm/°C TC; requires output capacitor | Higher accuracy (±0.2%) but larger solution size and mandatory 1 μF output cap | Prefer for ultra-low-drift applications where board area allows series topology and decoupling |
Compared with TL431CDBZR and REF3025AIDBZR, the LM4050CEM3X-2.5/NOPB offers fixed 2.5 V output with zero external components, lower minimum current than TL431, and smaller footprint than REF3025 - making it optimal for cost-sensitive, space-constrained shunt reference use cases.
Availability
LM4050CEM3X-2.5/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, data acquisition systems, and energy management applications requiring stable component supply, consistent parametric performance, and long-lifecycle availability.
Supply support for LM4050CEM3X-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 leader specializing in analog and embedded processing technologies, with decades of expertise in precision analog IC design and high-volume manufacturing.
The LM4050-N product line delivers micropower shunt voltage references optimized for accuracy, stability, and ease of use in space- and power-constrained systems - targeting instrumentation, industrial sensing, and automotive subsystems.
FAQ
What is the minimum operating current for LM4050CEM3X-2.5/NOPB?
The LM4050CEM3X-2.5/NOPB requires a minimum operating current of 65 μA across its full temperature range (−40°C to 125°C). At 25°C, the typical minimum is 60 μA. This low current enables use in battery-powered devices where standby power must be minimized while maintaining 2.5 V reference stability. The LM4050CEM3X-2.5/NOPB remains functional up to 15 mA.
Does LM4050CEM3X-2.5/NOPB require an output capacitor?
No, the LM4050CEM3X-2.5/NOPB does not require an output capacitor for stability. Its internal design eliminates the need for external compensation, even with capacitive loads up to 10 nF. This simplifies layout and reduces BOM count compared to many other shunt references. The LM4050CEM3X-2.5/NOPB remains stable across all operating conditions without added capacitance.
What is the temperature coefficient specification for LM4050CEM3X-2.5/NOPB?
The LM4050CEM3X-2.5/NOPB has a maximum temperature coefficient of 50 ppm/°C over the full operating range of −40°C to 125°C. At 25°C, the typical TC is ±15 ppm/°C. This translates to a worst-case voltage drift of approximately ±1.3 mV across the entire temperature span, supporting high-accuracy applications like precision data loggers and portable test equipment using the LM4050CEM3X-2.5/NOPB.
How does the LM4050CEM3X-2.5/NOPB differ from the A-grade version?
The LM4050CEM3X-2.5/NOPB is the C-grade variant, offering ±0.5% (±13 mV) initial tolerance at 25°C, whereas the A-grade (e.g., LM4050AIM3X-2.5/NOPB) provides ±0.1% (±2.5 mV) tolerance. Both share identical temperature coefficient (≤50 ppm/°C), noise (41 μVrms), and operating current range. The LM4050CEM3X-2.5/NOPB targets cost-sensitive applications where tighter initial accuracy is not required.
Is LM4050CEM3X-2.5/NOPB qualified for automotive applications?
The LM4050CEM3X-2.5/NOPB is not AEC-Q100 qualified. For automotive use, TI offers the LM4050-N-Q1 family (e.g., LM4050CQEM3X-2.5/NOPB), which is AEC-Q100 Grade 1 qualified and manufactured on an automotive-grade flow. The LM4050CEM3X-2.5/NOPB is rated for industrial and extended temperature operation but lacks automotive qualification documentation and process controls required for vehicle subsystems.
LM4050CEM3X-2.5/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 41µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 65 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050CEM3X-2.5/NOPB FAQ
1.How can I place an order for LM4050CEM3X-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050CEM3X-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 LM4050CEM3X-2.5/NOPB reliable?
The price and inventory of LM4050CEM3X-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 LM4050CEM3X-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050CEM3X-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050CEM3X-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050CEM3X-2.5/NOPB?
LM4050CEM3X-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050CEM3X-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 LM4050CEM3X-2.5/NOPB?
For technical support, including LM4050CEM3X-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050CEM3X-2.5/NOPB requirements.
6.How does Aetrix verify that LM4050CEM3X-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050CEM3X-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 LM4050CEM3X-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050CEM3X-2.5/NOPB?
All LM4050CEM3X-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050CEM3X-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 LM4050CEM3X-2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4050CEM3X-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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