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Texas Instruments LM4050QCEM3-2.5/NOPB
- Part No.:
- LM4050QCEM3-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QCEM3-2.5/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,579
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Product details
Overview
LM4050QCEM3-2.5/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a fixed 2.500 V reverse breakdown voltage with ±2.5 mV (±0.1%) initial tolerance at 25°C, 41 μVrms wideband noise (10 Hz–10 kHz), and 50 ppm/°C max temperature coefficient - used for high-accuracy ADC/DAC biasing and battery-powered instrumentation.
For engineers reviewing the LM4050QCEM3-2.5/NOPB datasheet, LM4050QCEM3-2.5/NOPB pinout, LM4050QCEM3-2.5/NOPB application, or LM4050QCEM3-2.5/NOPB equivalent, key selection criteria include guaranteed operation across −40°C to 125°C, stability without output capacitor, capacitive load tolerance, and AEC-Q100 Grade 1 qualification for automotive systems.
Technical Context
The LM4050QCEM3-2.5/NOPB implements a curvature-corrected bandgap shunt reference architecture with internal Zener-zap voltage trim, enabling ±0.1% accuracy at 25°C and stable regulation over 60 μA–15 mA cathode current. Its dynamic impedance is 0.3 Ω at 1 mA/120 Hz, supporting low-noise, high-PSRR analog signal chains.
It operates as a two-terminal device: cathode regulates against anode (ground), requiring only an external series resistor (RS) to set operating current. Pin 3 is unconnected (NC), and thermal hysteresis is limited to 0.7 mV after −40°C/125°C cycling - critical for metrology-grade repeatability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V nominal at 100 μA cathode current; enables LSB-matched 12-bit ADCs with 1 mV resolution when paired with 2.5 V full-scale inputs. |
| Initial Tolerance | ±2.5 mV (±0.1%) at 25°C - ensures single-point calibration suffices for high-accuracy sensor front-ends. |
| Temp Coefficient | ≤50 ppm/°C over −40°C to 125°C - limits drift to ±1.25 mV across full automotive range, preserving measurement integrity. |
| Wideband Noise | 41 μVrms (10 Hz–10 kHz) - supports <16-bit ENOB in precision data acquisition without external filtering. |
| Operating Current | 60 μA min / 15 mA max - allows ultra-low-power wake-up modes and robust overload protection in portable devices. |
| Dynamic Impedance | 0.3 Ω at 1 mA - maintains tight regulation under fast load transients, essential for multiplexed sampling systems. |
| Long-Term Stability | 120 ppm after 1000 hrs - guarantees <0.3 mV parametric shift over 1-year field deployment. |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, 3-pin surface-mount with gull-wing leads. Thermal resistance RθJA = 287 °C/W (board-mounted).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input & regulated voltage node | Connects to supply via RS; voltage referenced to Anode; must sink 60 μA–15 mA to maintain 2.5 V regulation. |
| Anode (Pin 2) | Reference ground return | Must be connected to system ground; serves as common reference point for all downstream circuitry. |
| NC (Pin 3) | No internal connection | Leave floating or tie to Pin 2 per TI recommendation for EMI-sensitive layouts; no electrical function. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-free stability | Internally compensated to remain stable with zero output capacitance - eliminates BOM cost and layout area for bypass caps. |
| Capacitive load tolerance | Stable with any value of capacitive load - enables direct connection to ADC sample capacitors or long PCB traces. |
| AEC-Q100 Grade 1 | Qualified for automotive applications from −40°C to 125°C ambient - meets functional safety requirements for ADAS and powertrain modules. |
| Low micropower operation | 60 μA minimum cathode current - supports >10-year battery life in IoT sensors and energy-harvesting nodes. |
| Thermal hysteresis control | 0.7 mV max after −40°C/125°C cycling - ensures repeatable voltage output after thermal stress, critical for calibration-critical test equipment. |
Applications
| Battery-Powered Instrumentation | Data-Acquisition Systems |
|---|---|
Use Scenario: Portable multimeter measuring DC voltage with 0.1% accuracy over 0–5 V range. IC Role / Device Role / Timing Role: Provides stable 2.5 V reference for 16-bit SAR ADC and analog front-end gain calibration. Use Value: Enables single-point factory calibration with <±0.5 mV total error budget across temperature and lifetime. | Use Scenario: Industrial PLC module digitizing 4–20 mA sensor loops with 12-bit resolution. IC Role / Device Role / Timing Role: Supplies precision 2.5 V reference to dual-slope integrator and offset-null circuitry. Use Value: Maintains ≤0.01% gain drift over 0–70°C, eliminating need for periodic recalibration in field deployments. |
| Automotive Sensor Modules | Precision Audio Level Detection |
Use Scenario: Cabin pressure sensor in HVAC control unit requiring AEC-Q100 compliance. IC Role / Device Role / Timing Role: References bridge amplifier output and ADC input in MEMS pressure sensing path. Use Value: Guarantees <±1.25 mV output shift across −40°C to 125°C ambient, meeting ASIL-B diagnostic coverage targets. | Use Scenario: Studio-grade audio analyzer detecting RMS level with ±0.05 dB accuracy. IC Role / Device Role / Timing Role: Sets reference threshold for logarithmic envelope detector feeding peak-hold circuit. Use Value: Delivers 41 μVrms noise floor - preserves dynamic range up to 108 dB without post-processing filtering. |
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 tolerance, 50 ppm/°C TC, 42 μVrms noise, SOT-23, but requires ≥100 nF output capacitor for stability. | Not qualified for automotive; lacks AEC-Q100 Grade 1 rating and extended temp support. | Select REF3025AIDBZR only for cost-sensitive industrial designs where capacitor addition is acceptable. |
| ADR3425ARJZ-R7 | 2.5 V, ±0.1% initial tolerance, 30 ppm/°C TC, 35 μVrms noise, SOT-23, but 100 μA min operating current - higher than LM4050QCEM3-2.5/NOPB's 60 μA. | Industrial temp only (−40°C to +125°C junction, but not ambient-rated); no automotive qualification. | Choose ADR3425ARJZ-R7 when lower noise and tighter TC are prioritized over micropower operation and automotive compliance. |
Compared with REF3025AIDBZR and ADR3425ARJZ-R7, the LM4050QCEM3-2.5/NOPB uniquely combines AEC-Q100 Grade 1 qualification, capacitor-free stability, and 60 μA minimum current - making it the only drop-in solution for space-constrained automotive and battery-critical precision references.
Availability
LM4050QCEM3-2.5/NOPB is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive sensor modules, precision data-acquisition systems, and industrial process control requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LM4050QCEM3-2.5/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 over 50 years of voltage reference innovation and automotive-grade component development.
The LM4050-N/-Q1 product line delivers precision shunt references optimized for space-constrained, low-power, and safety-critical applications - including automotive ADAS, portable medical devices, and industrial metrology equipment.
FAQ
What is the maximum operating temperature for LM4050QCEM3-2.5/NOPB?
The LM4050QCEM3-2.5/NOPB is rated for operation from −40°C to +125°C ambient temperature and is AEC-Q100 Grade 1 qualified. Its maximum junction temperature is 150°C, and thermal derating follows RθJA = 287 °C/W. At 125°C ambient and 10 mA cathode current, power dissipation remains within safe limits.
Does LM4050QCEM3-2.5/NOPB require an external output capacitor?
No, the LM4050QCEM3-2.5/NOPB is internally compensated and stable without any output capacitor. It tolerates arbitrary capacitive loads, including direct connection to ADC input capacitors or long PCB traces - simplifying layout and reducing BOM count.
What is the minimum cathode current needed for regulation in LM4050QCEM3-2.5/NOPB?
The LM4050QCEM3-2.5/NOPB requires a minimum cathode current of 60 μA at 25°C and 65 μA across the full −40°C to +125°C range to maintain regulation within specifications. Below this, output voltage deviates beyond ±0.1% tolerance.
How does thermal hysteresis affect LM4050QCEM3-2.5/NOPB performance?
Thermal hysteresis in the LM4050QCEM3-2.5/NOPB is specified at 0.7 mV maximum - defined as the voltage shift measured at 25°C before and after cycling between −40°C and +125°C. This ensures repeatable calibration points in field-repairable test equipment and automotive modules.
Is LM4050QCEM3-2.5/NOPB pin-compatible with other LM4050 variants?
Yes, all LM4050 SOT-23 variants - including LM4050AIM3-2.5, LM4050BEM3-2.5, and LM4050QCEM3-2.5/NOPB - share identical pinout (Cathode/Anode/NC), package dimensions, and footprint. Only electrical specs (tolerance grade, temp range, qualification) differ - enabling drop-in replacement during design revision.
LM4050QCEM3-2.5/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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050QCEM3-2.5/NOPB FAQ
1.How can I place an order for LM4050QCEM3-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QCEM3-2.5/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 LM4050QCEM3-2.5/NOPB reliable?
The price and inventory of LM4050QCEM3-2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QCEM3-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QCEM3-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QCEM3-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QCEM3-2.5/NOPB?
LM4050QCEM3-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QCEM3-2.5/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 LM4050QCEM3-2.5/NOPB?
For technical support, including LM4050QCEM3-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QCEM3-2.5/NOPB requirements.
6.How does Aetrix verify that LM4050QCEM3-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QCEM3-2.5/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 LM4050QCEM3-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QCEM3-2.5/NOPB?
All LM4050QCEM3-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QCEM3-2.5/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 LM4050QCEM3-2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4050QCEM3-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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