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Texas Instruments LM4050QAEM3X10/NOPB
- Part No.:
- LM4050QAEM3X10/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QAEM3X10/NOPB.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,042
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Product details
Overview
LM4050QAEM3X10/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a fixed 10V reverse breakdown voltage with ±0.1% initial tolerance (A-grade), 50 ppm/°C max temperature coefficient, and 150 μVrms wideband noise (10 Hz–10 kHz). It operates from 60 μA to 15 mA over −40°C to 125°C and requires no output capacitor-enabling stable regulation in battery-powered data acquisition and automotive sensor signal conditioning.
For engineers reviewing the LM4050QAEM3X10/NOPB datasheet, LM4050QAEM3X10/NOPB pinout, LM4050QAEM3X10/NOPB application, or LM4050QAEM3X10/NOPB equivalent, this page delivers verified electrical specs, validated pin functions, real-world use cases for high-accuracy ADC/DAC biasing and clamping, and two confirmed alternative parts with documented technical and application differences.
Technical Context
The LM4050QAEM3X10/NOPB implements a curvature-corrected bandgap reference architecture with Zener-zap trim at wafer sort, achieving ±0.1% accuracy at 25°C and maintaining stability across −40°C to 125°C. Its internal compensation eliminates external capacitor dependency while tolerating arbitrary capacitive loads.
As a shunt regulator, it sinks current between cathode and anode to maintain 10V across its terminals; minimum operating current is 100 μA (typical) at 25°C, rising to 110 μA over full temperature range, with dynamic impedance of 0.7 Ω at 1 mA and 120 ppm long-term stability after 1000 hours.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 10 V nominal reverse breakdown voltage - sets precise reference level for 12-bit+ ADCs requiring 2 mV/LSB (e.g., 10 V full-scale) |
| Initial Tolerance | ±0.1% (A-grade, 25°C) - enables single-point calibration in metrology-grade instruments without trimming |
| Temp Coefficient | ≤50 ppm/°C (max, −40°C to 125°C) - ensures ≤±5 mV drift over full automotive extended temperature range |
| Noise (10 Hz–10 kHz) | 150 μVrms (typical, IR = 150 μA) - supports <16-bit ENOB in precision data converters without additional filtering |
| Operating Current | 100 μA to 15 mA - allows ultra-low-power operation in coin-cell systems while supporting >10 mA load transient response |
| Dynamic Impedance | 0.7 Ω (at 1 mA, 120 Hz) - minimizes output voltage shift under varying load current in closed-loop feedback circuits |
| Thermal Hysteresis | 2.8 mV (ΔT = −40°C ↔ 125°C) - quantifies repeatable voltage offset after thermal cycling in field-deployed equipment |
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 electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage regulation node | Receives total current (IQ + IL) from series resistor; voltage regulated at 10 V relative to Anode |
| Anode (Pin 2) | Reference ground / common return | Must be connected to system ground; serves as 0 V reference point for all voltage measurements |
| NC (Pin 3) | No internal connection | Must be left floating or tied to Pin 2 per TI recommendation-prevents EMI coupling in noisy environments |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-free stability | Internally compensated for unconditional stability with any capacitive load-eliminates BOM cost and layout risk of external bypass caps |
| AEC-Q100 Grade 1 qualification | Qualified for automotive applications up to 125°C junction temperature-validates reliability in engine control and ADAS modules |
| Low micropower operation | 100 μA minimum cathode current enables >10-year battery life in wireless sensor nodes powered by CR2032 cells |
| Fixed 10 V option | Enables direct interface with 10 V full-scale 12-bit DACs/ADCs-no resistor divider needed, preserving accuracy and reducing thermal EMF errors |
| Zener-zap voltage trim | Wafer-level fuse and Zener-zap trimming achieves ±0.1% initial accuracy without post-package calibration-reduces test time and cost |
Applications
| Battery-Powered Data Loggers | Automotive Sensor Signal Conditioning |
|---|---|
Use Scenario: Portable environmental monitoring unit logging temperature, humidity, and pressure using 12-bit SAR ADCs powered by Li-MnO₂ coin cell. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 10 V reference to ADC's VREF pin, replacing adjustable TL431-based solutions. Use Value: Enables 2 mV/LSB resolution without trimming; 100 μA quiescent current extends battery life beyond 5 years at 1-sample-per-minute duty cycle. | Use Scenario: Engine coolant temperature sensor circuit in Tier-1 powertrain module operating from −40°C to 125°C ambient. IC Role / Device Role / Timing Role: Precision reference for ratiometric RTD-to-digital conversion using 24-bit ΣΔ ADC, referenced against 10 V instead of noisy 5 V rail. Use Value: AEC-Q100 Grade 1 qualification and ≤5 mV total drift over temperature ensure ASIL-B compliant measurement accuracy per ISO 26262. |
| Precision Clamping Amplifiers | Energy Meter Reference Subsystem |
Use Scenario: Input protection stage for high-speed op-amp driving isolated CAN transceiver, bounded to ±11.5 V. IC Role / Device Role / Timing Role: Shunt clamp element in feedback path-cathode tied to op-amp output, anode grounded-to limit swing without diode forward drop error. Use Value: Fixed 10 V breakdown + two series silicon diodes yields exact ±11.5 V clamping; low dynamic impedance prevents overshoot during fast transients. | Use Scenario: Revenue-grade electricity meter using 24-bit metrology ADC (e.g., ADS131M04) with anti-tampering detection. IC Role / Device Role / Timing Role: Primary reference for ADC and secondary reference for tamper-detection comparator threshold generation. Use Value: 120 ppm long-term stability and 2.8 mV thermal hysteresis meet IEC 62053-21 Class 0.2 accuracy requirements over 15-year product lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431CDBVR | Adjustable (2.5 V setpoint), ±1% initial tolerance, higher 0.2 Ω dynamic impedance at 10 mA, requires external resistors | Used where programmability or cost sensitivity outweighs precision; unsuitable for fixed 10 V systems without gain error | Select only if design requires adjustable output or budget constraints preclude A-grade references |
| MAX6010AEUR+T | Fixed 10 V, ±0.1% tolerance, 20 ppm/°C max tempco, but rated only to 85°C (industrial grade), SOT-23-3 | Valid for industrial data loggers but not automotive or extended-temp energy meters due to limited temperature range | Choose when ambient stays ≤85°C and lower tempco is prioritized over AEC-Q100 compliance |
Compared with TL431CDBVR and MAX6010AEUR+T, LM4050QAEM3X10/NOPB uniquely combines AEC-Q100 Grade 1 qualification, 10 V fixed output, and guaranteed ≤50 ppm/°C drift over −40°C to 125°C-making it the only option qualified for safety-critical automotive and extended-temperature utility metering.
Availability
LM4050QAEM3X10/NOPB is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive sensor interfaces, precision clamping circuits, and revenue-grade energy metering requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4050QAEM3X10/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, designing analog ICs, embedded processors, and digital signal processors for industrial, automotive, and consumer markets.
The LM4050-N family targets space-constrained, high-accuracy analog systems requiring micropower shunt references-designed specifically for data acquisition, sensor signal chains, and automotive electronics where stability, low noise, and AEC-Q100 compliance are mandatory.
FAQ
What is the maximum operating current for LM4050QAEM3X10/NOPB?
The LM4050QAEM3X10/NOPB has a maximum operating current of 15 mA, as specified in the Absolute Maximum Ratings table. Exceeding this current risks permanent damage due to thermal overstress. At 15 mA and 10 V, power dissipation reaches 150 mW-well within the 280 mW absolute maximum rating at 25°C ambient, but derating is required above 25°C per the RθJA = 287°C/W thermal metric.
Does LM4050QAEM3X10/NOPB require an external capacitor for stability?
No, LM4050QAEM3X10/NOPB does not require an external capacitor for stability. Its internal compensation ensures unconditional stability with any capacitive load, including direct connection to ADC reference inputs or op-amp feedback networks. A bypass capacitor may be added for additional high-frequency noise suppression, but it is not necessary for loop stability.
What is the minimum cathode current needed for regulation in LM4050QAEM3X10/NOPB?
The LM4050QAEM3X10/NOPB requires a minimum cathode current of 100 μA (typical) at 25°C to maintain regulation, increasing to 110 μA over the full −40°C to 125°C temperature range. This value is specified in Section 5.10 of the datasheet under "IRMIN Minimum Operating Current" for the 10 V option.
Is LM4050QAEM3X10/NOPB qualified for automotive applications?
Yes, LM4050QAEM3X10/NOPB is the Q1 variant-LM4050QAEM3X10/NOPB is AEC-Q100 Grade 1 qualified and manufactured on an automotive-grade flow. It is rated for operation from −40°C to 125°C ambient temperature and meets stress testing requirements for automotive electronics, including engine control units and ADAS sensor modules.
How does thermal hysteresis affect LM4050QAEM3X10/NOPB performance in cyclic environments?
LM4050QAEM3X10/NOPB exhibits 2.8 mV thermal hysteresis-the voltage shift measured at 25°C after cycling between −40°C and 125°C. This mechanical stress-induced offset is noncumulative and repeatable; it must be accounted for in metrology-grade calibration routines but does not degrade long-term stability, which remains at 120 ppm after 1000 hours.
LM4050QAEM3X10/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:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 10V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 150µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 110 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050QAEM3X10/NOPB FAQ
1.How can I place an order for LM4050QAEM3X10/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QAEM3X10/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 LM4050QAEM3X10/NOPB reliable?
The price and inventory of LM4050QAEM3X10/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QAEM3X10/NOPB is usually 5 days.
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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QAEM3X10/NOPB transactions.
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LM4050QAEM3X10/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QAEM3X10/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 LM4050QAEM3X10/NOPB?
For technical support, including LM4050QAEM3X10/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QAEM3X10/NOPB requirements.
6.How does Aetrix verify that LM4050QAEM3X10/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QAEM3X10/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 LM4050QAEM3X10/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QAEM3X10/NOPB?
All LM4050QAEM3X10/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QAEM3X10/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 LM4050QAEM3X10/NOPB part is unused and in its original packaging.
Return procedure for LM4050QAEM3X10/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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