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Texas Instruments LM4050QCEM3X2.5/NOPB
- Part No.:
- LM4050QCEM3X2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QCEM3X2.5/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,702
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Product details
Overview
LM4050QCEM3X2.5/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering 2.500 V ±2.5 mV (A-grade, 25°C) reverse breakdown voltage with 41 μVrms wideband noise (10 Hz–10 kHz), 50 ppm/°C max temperature coefficient, and stable operation across 60 μA–15 mA cathode current. It enables high-accuracy ADC/DAC biasing in automotive and industrial data-acquisition systems.
For engineers reviewing the LM4050QCEM3X2.5/NOPB datasheet, LM4050QCEM3X2.5/NOPB pinout, LM4050QCEM3X2.5/NOPB application, or LM4050QCEM3X2.5/NOPB equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, no-output-capacitor-required stability, fixed 2.5 V output, extended −40°C to +125°C operating range, and SOT-23 footprint compatibility with space-constrained PCB layouts.
Technical Context
The LM4050QCEM3X2.5/NOPB implements a curvature-corrected bandgap shunt reference architecture with Zener-zap trim at wafer sort, achieving ±0.1% initial accuracy. Its internal compensation eliminates external capacitor dependency while maintaining stability under capacitive loads up to 10 nF.
It operates as a two-terminal device: cathode regulates against anode (ground), with dynamic impedance of 0.3 Ω at 1 mA and thermal hysteresis of 0.7 mV over −40°C to +125°C cycling. The NC pin (Pin 3) must be left floating or tied to anode to suppress EMI-induced errors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V ±2.5 mV at 100 μA, 25°C - ensures 12-bit ADC full-scale alignment without trimming |
| Tempco (max) | 50 ppm/°C over −40°C to +125°C - limits drift to ±1.25 mV across full range |
| Noise (10 Hz–10 kHz) | 41 μVrms at 100 μA - supports <16-bit ENOB in precision measurement front-ends |
| Operating Current | 60 μA min / 15 mA max - enables ultra-low-power sensor nodes and robust high-current regulation |
| Dynamic Impedance | 0.3 Ω at 1 mA, 120 Hz - minimizes load-induced voltage sag during transient current steps |
| Long-Term Stability | 120 ppm after 1000 hrs - guarantees <0.3 mV output shift over 1-year field deployment |
| Thermal Hysteresis | 0.7 mV - defines repeatability error after thermal cycling between −40°C and +125°C |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, 3-pin surface-mount configuration with exposed die pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input & regulated voltage node | Connects to series resistor (RS) and load; voltage referenced to anode; carries total cathode current (IQ + IL) |
| Anode (Pin 2) | Reference ground terminal | Must be connected to system ground; serves as return path for cathode current and defines 0 V reference point |
| NC (Pin 3) | No internal connection | Must be left floating or tied to Pin 2 (anode); prevents EMI coupling in noisy environments |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualified | Validated for automotive applications with operation from −40°C to +125°C ambient |
| No output capacitor required | Internally compensated for unconditional stability with any capacitive load ≤10 nF |
| Low micropower operation | 60 μA minimum cathode current enables battery life extension in always-on monitoring systems |
| Fixed 2.5 V output | Eliminates external resistor network; simplifies layout and reduces BOM count for 2.5 V reference rails |
| Tolerates capacitive loads | Stable with bypass caps up to 10 nF-supports local decoupling without oscillation risk |
Applications
| Battery-Powered Data Loggers | Automotive Cabin Temperature Sensors |
|---|---|
Use Scenario: Continuous 16-bit ADC sampling in remote environmental monitors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Provides stable 2.5 V reference for SAR ADC conversion, directly determining LSB size and absolute measurement accuracy. Use Value: 41 μVrms noise and 50 ppm/°C tempco ensure <±0.01% full-scale error over temperature and battery discharge cycle. |
Use Scenario: High-reliability cabin air temperature sensing in HVAC control modules requiring AEC-Q100 compliance. IC Role / Device Role / Timing Role: Supplies precision bias to thermistor interface amplifier, enabling ±0.1°C resolution over −40°C to +85°C. Use Value: AEC-Q100 Grade 1 qualification and 120 ppm long-term stability guarantee calibration integrity across 15-year vehicle lifetime. |
| Industrial Process Transmitters | Energy Meter Reference Subsystem |
Use Scenario: 4–20 mA loop-powered pressure transmitter with integrated signal conditioning and digital output. IC Role / Device Role / Timing Role: Serves as primary voltage reference for analog front-end PGA and 24-bit sigma-delta ADC. Use Value: 0.3 Ω dynamic impedance and 60 μA min current allow stable regulation despite supply ripple and varying loop load. |
Use Scenario: Polyphase electricity meter requiring metrology-grade accuracy per IEC 62053-21 Class 0.2. IC Role / Device Role / Timing Role: Sets reference for anti-aliasing filter cutoff and ADC full-scale, defining energy measurement linearity. Use Value: Thermal hysteresis of 0.7 mV and ±2.5 mV initial tolerance meet tight offset drift requirements for revenue-grade billing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3025AIDBZR | 2.5 V, ±0.2% initial accuracy, 50 ppm/°C tempco, 50 μVrms noise, SOT-23, but requires 1 μF output capacitor for stability | Higher noise and capacitor dependency limit use in ultra-low-power or high-EMI environments where LM4050QCEM3X2.5/NOPB excels | Select LM4050QCEM3X2.5/NOPB when capacitor-free operation, AEC-Q100 qualification, or lower noise is mandatory |
| ADR3425ARJZ-R7 | 2.5 V, ±0.1% initial accuracy, 30 ppm/°C tempco, 35 μVrms noise, SOT-23, but rated only for −40°C to +125°C junction (not ambient) and lacks AEC-Q100 certification | Superior tempco and noise suit lab instrumentation, but non-automotive qualification restricts automotive deployment | Choose LM4050QCEM3X2.5/NOPB for production automotive systems; ADR3425ARJZ-R7 fits industrial test gear needing tighter tempco |
Compared with REF3025AIDBZR and ADR3425ARJZ-R7, the LM4050QCEM3X2.5/NOPB uniquely combines AEC-Q100 Grade 1 qualification, capacitor-free stability, and automotive-qualified extended temperature operation-making it the only drop-in solution for safety-critical automotive voltage reference needs.
Availability
LM4050QCEM3X2.5/NOPB is available at Aetrix Electronics and suitable for battery-powered equipment, automotive electronics, and industrial process control requiring stable component supply with guaranteed long-term manufacturability and traceable sourcing.
Supply support for LM4050QCEM3X2.5/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 reference design and automotive-grade component validation.
The LM4050-N product line delivers micropower shunt references optimized for space-constrained, high-accuracy applications including automotive sensors, portable instrumentation, and energy metering-where low drift, low noise, and qualification rigor are essential.
FAQ
What is the maximum operating current for LM4050QCEM3X2.5/NOPB?
The LM4050QCEM3X2.5/NOPB supports a maximum cathode current of 15 mA. Exceeding this value risks exceeding the 280 mW power dissipation limit at 25°C ambient and may cause thermal shutdown or permanent damage. Derating is required above 25°C using RθJA = 287°C/W.
Does LM4050QCEM3X2.5/NOPB require an external output capacitor?
No, the LM4050QCEM3X2.5/NOPB is internally compensated and does not require an external output capacitor for stability. It remains stable with any capacitive load up to 10 nF, simplifying layout and reducing BOM cost-unlike many competing references that mandate ≥1 μF ceramic capacitance.
Is LM4050QCEM3X2.5/NOPB qualified for automotive applications?
Yes, LM4050QCEM3X2.5/NOPB is AEC-Q100 Grade 1 qualified (−40°C to +125°C ambient), manufactured on an automotive-grade flow, and specified for use in safety-critical automotive subsystems including engine control, ADAS sensors, and body electronics.
What is the thermal hysteresis specification for LM4050QCEM3X2.5/NOPB?
The LM4050QCEM3X2.5/NOPB exhibits 0.7 mV thermal hysteresis, measured as the voltage shift at 25°C after cycling between −40°C and +125°C. This parameter reflects mechanical stress-induced drift and is critical for applications requiring repeatable calibration after thermal exposure.
How does the NC pin (Pin 3) function on LM4050QCEM3X2.5/NOPB?
Pin 3 of the LM4050QCEM3X2.5/NOPB is a no-connect terminal with no internal bond. TI specifies it must be left floating or connected to Pin 2 (anode) - especially in high-EMI environments near transformers or switching regulators - to prevent noise coupling into the reference node.
LM4050QCEM3X2.5/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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050QCEM3X2.5/NOPB FAQ
1.How can I place an order for LM4050QCEM3X2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QCEM3X2.5/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 LM4050QCEM3X2.5/NOPB reliable?
The price and inventory of LM4050QCEM3X2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QCEM3X2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QCEM3X2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QCEM3X2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QCEM3X2.5/NOPB?
LM4050QCEM3X2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QCEM3X2.5/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 LM4050QCEM3X2.5/NOPB?
For technical support, including LM4050QCEM3X2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QCEM3X2.5/NOPB requirements.
6.How does Aetrix verify that LM4050QCEM3X2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QCEM3X2.5/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 LM4050QCEM3X2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QCEM3X2.5/NOPB?
All LM4050QCEM3X2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QCEM3X2.5/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 LM4050QCEM3X2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4050QCEM3X2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050QCEM3X2.5/NOPB Tags
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