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Texas Instruments LM4050QBEM3-4.1/NOPB
- Part No.:
- LM4050QBEM3-4.1/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QBEM3-4.1/NOPB.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,681
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Product details
Overview
LM4050QBEM3-4.1/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a fixed 4.096 V reverse breakdown voltage with ±0.1% initial tolerance (A-grade), 50 ppm/°C max temperature coefficient, and 93 μVrms wideband noise (10 Hz–10 kHz). It operates from 68 μA to 15 mA over −40°C to 125°C and requires no output capacitor-enabling stable regulation in battery-powered data-acquisition systems and 12-bit ADC/DAC references.
For engineers reviewing the LM4050QBEM3-4.1/NOPB datasheet, LM4050QBEM3-4.1/NOPB pinout, LM4050QBEM3-4.1/NOPB application, or LM4050QBEM3-4.1/NOPB equivalent, key selection criteria include its 4.096 V output (ideal for 1 mV/LSB 12-bit converters), AEC-Q100 Grade 1 qualification, SOT-23 thermal performance (RθJA = 287°C/W), and guaranteed stability with capacitive loads without external compensation.
Technical Context
The LM4050QBEM3-4.1/NOPB implements a curvature-corrected bandgap shunt reference architecture with Zener-zap trim at wafer sort, achieving ±0.1% accuracy at 25°C. Its internal compensation eliminates need for external stabilization capacitance while maintaining stability across 0–15 mA cathode current and any capacitive load.
It functions as a two-terminal device: cathode regulates voltage relative to anode (ground), with dynamic impedance of 0.5 Ω at 1 mA and thermal hysteresis of 1.148 mV after −40°C/125°C cycling. The NC pin (Pin 3) must be left floating or tied to anode to avoid EMI-induced errors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal reverse breakdown voltage - enables exact 1 mV LSB for 12-bit ADCs/DACs powered from 5 V rails |
| Initial Tolerance (A-grade) | ±0.1% at 25°C - corresponds to ±4.1 mV absolute error, verified via fuse/Zener-zap trim |
| Tempco (max) | 50 ppm/°C over −40°C to 125°C - ensures ≤ ±21 mV total drift across full extended range |
| Operating Current Range | 68 μA to 15 mA - supports ultra-low-power sensor nodes and high-current precision buffers |
| Wideband Noise | 93 μVrms (10 Hz–10 kHz) - low enough for 16-bit effective resolution in metrology front-ends |
| Dynamic Impedance | 0.5 Ω at 1 mA - minimizes load-regulation error (<8 mV over 1–15 mA change) |
| Thermal Hysteresis | 1.148 mV - quantifies reversible voltage shift after thermal cycling, critical for calibration repeatability |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, 3-pin surface-mount configuration with exposed die attach pad not connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / regulated voltage node | Carries total current (IQ + IL); voltage referenced to anode; must be driven through series resistor RS |
| Anode (Pin 2) | Reference ground / common return | Internally connected to substrate; must be tied to system ground; serves as voltage reference point for cathode |
| NC (Pin 3) | No internal connection | Must be left floating or connected to Pin 2 (anode); prevents EMI coupling in noisy environments |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Internally compensated for unconditional stability - eliminates BOM cost, layout area, and capacitor aging effects |
| Tolerates capacitive loads | Maintains regulation with any value of output capacitance - simplifies filtering in ADC reference paths |
| Fixed 4.096 V output | Matches 5 V–supplied 12-bit systems for exact 1 mV/LSB scaling - avoids resistor-divider error and drift |
| AEC-Q100 Grade 1 qualified | Validated for automotive ambient temperatures (−40°C to 125°C) and lifetime reliability - suitable for ADAS sensor modules |
| Low 68 μA minimum operating current | Enables operation from coin cells or energy-harvesting sources - extends battery life in portable instrumentation |
Applications
| Battery-Powered Data Loggers | Precision 12-Bit ADC Reference |
|---|---|
Use Scenario: Continuous low-power monitoring of temperature, pressure, and humidity in remote environmental sensors. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 4.096 V excitation and conversion reference for SAR ADCs. Use Value: Enables 1 mV/LSB resolution without trimming; 68 μA min current allows >5-year operation on CR2032 cells. |
Use Scenario: High-fidelity analog input stage in industrial PLC analog input modules. IC Role / Device Role / Timing Role: Primary reference source for 12-bit successive-approximation ADCs sampling at ≤1 MSPS. Use Value: 93 μVrms noise and 0.5 Ω dynamic impedance limit code uncertainty to <0.5 LSB across full temperature range. |
| Automotive Cabin Air Quality Sensors | Energy Metering Reference |
Use Scenario: CO₂ and VOC sensing in vehicle HVAC control units requiring AEC-Q100 compliance. IC Role / Device Role / Timing Role: Precision bias and reference for electrochemical sensor signal conditioning. Use Value: Grade 1 qualification and 50 ppm/°C tempco ensure calibration stability across cabin temperature swings (−40°C to 85°C). |
Use Scenario: Revenue-grade electricity metering using metrology-grade ADCs (e.g., ADS131M0x). IC Role / Device Role / Timing Role: Stable 4.096 V reference for anti-aliasing filter biasing and ADC full-scale setting. Use Value: 120 ppm long-term stability (1000 hrs) and 1.148 mV thermal hysteresis support Class 0.2 accuracy certification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3040AIDBZR | 4.096 V, ±0.2% initial tolerance, 100 ppm/°C max tempco, 50 μVrms noise, SOT-23 | Higher noise floor and looser tolerance reduce 12-bit LSB accuracy margin; lower quiescent current (50 μA) | Prefer when ultra-low power dominates over precision; verify 1 mV/LSB compliance under worst-case drift. |
| ADR3440ARJZ-R7 | 4.096 V, ±0.1% initial tolerance, 30 ppm/°C max tempco, 6.5 μVrms noise, SOT-23 | Lower noise and tighter tempco improve resolution but require 100 μA min current and external capacitor for stability | Choose when sub-LSB noise and <15 ppm/°C drift are mandatory; accept added capacitor and layout complexity. |
Compared with REF3040AIDBZR, LM4050QBEM3-4.1/NOPB delivers tighter initial tolerance and lower thermal drift at higher noise; versus ADR3440ARJZ-R7, it trades ultra-low noise for capacitor-free operation and lower minimum current-making it optimal for cost-sensitive, space-constrained 12-bit systems where 1 mV/LSB is the primary design target.
Availability
LM4050QBEM3-4.1/NOPB is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive sensor modules, and energy metering systems requiring stable component supply with AEC-Q100 qualification and extended temperature support.
Supply support for LM4050QBEM3-4.1/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 headquartered in Dallas, Texas, specializing in analog, embedded processing, and digital signal technologies for industrial, automotive, and consumer markets.
The LM4050-N product line delivers precision shunt references optimized for space-constrained, low-power systems requiring factory-trimmed accuracy and zero-output-capacitor operation-targeting data acquisition, sensor signal chains, and automotive electronics.
FAQ
What is the output voltage tolerance of LM4050QBEM3-4.1/NOPB at 25°C?
The LM4050QBEM3-4.1/NOPB has an initial output voltage tolerance of ±0.1% at 25°C, corresponding to ±4.1 mV around its nominal 4.096 V reverse breakdown voltage. This A-grade specification is achieved via Zener-zap and fuse trimming during wafer sort and is 100% production tested.
Does LM4050QBEM3-4.1/NOPB require an external output capacitor?
No, LM4050QBEM3-4.1/NOPB does not require an external output capacitor. Its internal compensation ensures unconditional stability with any capacitive load, eliminating the need for external bypass components and reducing bill-of-materials cost and PCB area.
What is the minimum operating current for LM4050QBEM3-4.1/NOPB?
The LM4050QBEM3-4.1/NOPB requires a minimum cathode operating current of 68 μA at 25°C and 78 μA across the full −40°C to 125°C extended temperature range. Below this threshold, regulation is not guaranteed per datasheet specifications.
Is LM4050QBEM3-4.1/NOPB qualified for automotive applications?
Yes, LM4050QBEM3-4.1/NOPB is LM4050-N-Q1 variant and is AEC-Q100 Grade 1 qualified, rated for operation from −40°C to 125°C ambient temperature and validated for automotive reliability requirements including HTOL, TC, and ESD robustness.
How does the NC pin (Pin 3) function on LM4050QBEM3-4.1/NOPB?
Pin 3 of LM4050QBEM3-4.1/NOPB is a no-connect terminal with no internal bond. TI specifies it must be left floating or connected to Pin 2 (anode) to prevent electromagnetic interference coupling-especially critical near transformers or high-frequency switching circuits.
LM4050QBEM3-4.1/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):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 93µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 78 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050QBEM3-4.1/NOPB FAQ
1.How can I place an order for LM4050QBEM3-4.1/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QBEM3-4.1/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 LM4050QBEM3-4.1/NOPB reliable?
The price and inventory of LM4050QBEM3-4.1/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QBEM3-4.1/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QBEM3-4.1/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QBEM3-4.1/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QBEM3-4.1/NOPB?
LM4050QBEM3-4.1/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QBEM3-4.1/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 LM4050QBEM3-4.1/NOPB?
For technical support, including LM4050QBEM3-4.1/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QBEM3-4.1/NOPB requirements.
6.How does Aetrix verify that LM4050QBEM3-4.1/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QBEM3-4.1/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 LM4050QBEM3-4.1/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QBEM3-4.1/NOPB?
All LM4050QBEM3-4.1/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QBEM3-4.1/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 LM4050QBEM3-4.1/NOPB part is unused and in its original packaging.
Return procedure for LM4050QBEM3-4.1/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050QBEM3-4.1/NOPB Tags
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