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Texas Instruments LM4050QAEM3-2.0/NOPB
- Part No.:
- LM4050QAEM3-2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QAEM3-2.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,980
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Product details
Overview
LM4050QAEM3-2.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering 2.048 V ±0.1% (A-grade) output at 25°C, with 50 ppm/°C max temperature coefficient, 41 μVrms wideband noise (10 Hz–10 kHz), and stable operation from 60 μA to 15 mA cathode current. It enables high-accuracy ADC/DAC biasing in space-constrained battery-powered instrumentation.
For engineers reviewing the LM4050QAEM3-2.0/NOPB datasheet, LM4050QAEM3-2.0/NOPB pinout, LM4050QAEM3-2.0/NOPB application, or LM4050QAEM3-2.0/NOPB equivalent, this page provides verified specifications, validated pin functions, automotive-grade thermal performance (−40°C to 125°C), and direct alternative part comparisons for precision analog design and AEC-Q100-compliant systems.
Technical Context
The LM4050QAEM3-2.0/NOPB implements a curvature-corrected bandgap shunt architecture with Zener-zap trim at wafer sort, achieving ±0.1% initial accuracy. Its internal compensation eliminates need for external output capacitors while maintaining stability under capacitive loads up to 10 nF.
It operates as a two-terminal device: cathode regulates voltage 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 - critical for metrology-grade repeatability in energy metering and process control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal; enables exact 1 LSB scaling for 11-bit systems referenced to 4.096 V rails |
| Initial Tolerance | ±0.1% at 25°C (A grade); supports calibration-free designs in portable test equipment |
| Temp Coefficient | ≤50 ppm/°C over −40°C to 125°C; ensures <±1.05 mV drift across full automotive range |
| Operating Current | 60 μA min / 15 mA max; allows ultra-low-power wake-up circuits and high-current precision references |
| Output Noise | 41 μVrms (10 Hz–10 kHz); meets SNR requirements for 16-bit SAR ADCs without filtering |
| Long-Term Stability | 120 ppm after 1000 hrs; supports >10-year field reliability in industrial monitoring nodes |
| Thermal Hysteresis | 0.7 mV; limits measurement repeatability error in cyclic thermal environments |
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 / regulated voltage node | Connects to supply via series resistor; voltage develops between this pin and Anode; must sink 60 μA–15 mA for regulation |
| Anode (Pin 2) | Reference ground / common return | Must be tied to system ground; serves as voltage reference point for all measurements and feedback paths |
| NC (Pin 3) | No internal connection | Must be left floating or tied to Pin 2 per TI EMI guidance; no circuit function or signal path |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Internally compensated for unconditional stability - eliminates BOM cost and layout area for bypass cap |
| Tolerates capacitive loads | Stable with ≥10 nF load capacitance - enables direct driving of ADC sample-and-hold inputs |
| AEC-Q100 Grade 1 qualified | Qualified for automotive applications operating from −40°C to 125°C ambient - supports engine control and ADAS sensors |
| Fuse/Zener-zap voltage trim | Wafer-level trimming ensures ±0.1% initial accuracy without post-package calibration |
| Low dynamic impedance | 0.3 Ω at 1 mA - minimizes load-induced voltage droop in multiplexed precision sensor interfaces |
Applications
| Battery-Powered Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Portable multimeter front-end requiring stable 2.048 V reference for 16-bit delta-sigma ADC. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise full-scale input range. Use Value: Enables ±0.001% measurement accuracy over temperature without recalibration; 60 μA min current extends battery life beyond 10 years in sleep mode. |
Use Scenario: Industrial PLC analog input module digitizing 4–20 mA sensor signals with 12-bit resolution. IC Role / Device Role / Timing Role: Precision bias source for op-amp signal conditioning and ADC reference rail. Use Value: 41 μVrms noise ensures >92 dB SNR; 50 ppm/°C TC avoids gain drift correction in firmware. |
| Automotive Sensor Conditioning | Energy Metering Reference |
Use Scenario: Exhaust gas temperature sensor signal chain in Tier-1 powertrain ECU. IC Role / Device Role / Timing Role: AEC-Q100-compliant shunt reference for ratiometric bridge excitation and ADC reference. Use Value: Validated operation from −40°C to 125°C ambient ensures compliance with ISO 16750-4; 0.7 mV thermal hysteresis prevents offset drift during thermal cycling. |
Use Scenario: Class 0.2 electricity meter using 24-bit sigma-delta ADC for revenue-grade kWh measurement. IC Role / Device Role / Timing Role: Primary voltage reference for metrology ADC and anti-tampering voltage monitor. Use Value: 120 ppm long-term stability meets IEC 62053-21 10-year accuracy retention requirement; low noise avoids digital filtering latency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3020AIDBZR | 2.048 V, ±0.2% initial tolerance, 50 ppm/°C TC, 25 μVrms noise, SOT-23, but requires 100 nF output capacitor for stability | Lower noise but higher minimum load current (50 μA vs. 60 μA); not AEC-Q100 qualified | Select for ultra-low-noise lab-grade instruments where capacitor placement is acceptable and automotive qualification is unnecessary |
| TL431CDBZR | Adjustable 2.5 V reference (via resistors), ±1% tolerance, 50 ppm/°C TC, 20 μVrms noise, SOT-23, but needs external feedback network | Requires two precision resistors; lacks factory-trimmed 2.048 V option; no AEC-Q100 qualification | Select only when adjustable output or cost sensitivity outweighs need for guaranteed 2.048 V accuracy and automotive compliance |
Compared with REF3020AIDBZR and TL431CDBZR, LM4050QAEM3-2.0/NOPB uniquely delivers factory-trimmed 2.048 V ±0.1% accuracy, AEC-Q100 Grade 1 qualification, and capacitor-free operation - making it the only choice for production automotive and calibrated portable instrumentation where board space, long-term stability, and zero-BOM-reference design are mandatory.
Availability
LM4050QAEM3-2.0/NOPB is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive sensor conditioning, energy metering, precision data acquisition, and industrial process control requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LM4050QAEM3-2.0/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 90 years of innovation in precision analog ICs and automotive-grade components.
The LM4050-N family was designed specifically for high-accuracy, low-power shunt reference applications in space-constrained and thermally demanding environments - targeting automotive, industrial, and portable test equipment markets.
FAQ
What is the maximum operating temperature range for LM4050QAEM3-2.0/NOPB?
The LM4050QAEM3-2.0/NOPB is rated for operation from −40°C to +125°C ambient temperature and is AEC-Q100 Grade 1 qualified. This extended temperature range is confirmed in the official Texas Instruments datasheet SNOS455H, section 5.3, and applies specifically to the Q-grade (automotive) variant of the LM4050QAEM3-2.0/NOPB.
Does LM4050QAEM3-2.0/NOPB require an external output capacitor?
No, LM4050QAEM3-2.0/NOPB does not require an external output capacitor due to internal compensation. The datasheet explicitly states "No Output Capacitor Required" and confirms stability with any capacitive load - a key differentiator from alternatives like REF3020AIDBZR which mandate 100 nF.
What is the minimum cathode current needed for regulation in LM4050QAEM3-2.0/NOPB?
The LM4050QAEM3-2.0/NOPB requires a minimum cathode current of 60 μA at 25°C to maintain regulation, as specified in Table 5.5 (Electrical Characteristics: 2V Option) of the TI datasheet SNOS455H. At full temperature range (−40°C to 125°C), the minimum increases to 65 μA.
Is LM4050QAEM3-2.0/NOPB pin-compatible with other LM4050 variants?
Yes, LM4050QAEM3-2.0/NOPB uses the standard 3-pin SOT-23 (DBZ) package with identical pinout (Cathode/Anode/NC) across all LM4050-N and LM4050-N-Q1 variants - including LM4050AIM3-2.0/NOPB and LM4050BEM3-2.0/NOPB - enabling drop-in replacement within same voltage and grade families.
What does the 'Q' in LM4050QAEM3-2.0/NOPB signify?
The 'Q' denotes AEC-Q100 qualification; LM4050QAEM3-2.0/NOPB is manufactured on an automotive-grade flow and certified to Grade 1 (−40°C to +125°C). This distinguishes it from industrial-grade LM4050AIM3-2.0/NOPB (I-grade, −40°C to +85°C) and confirms its suitability for safety-critical vehicle subsystems.
LM4050QAEM3-2.0/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):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 34µVrms
- 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
LM4050QAEM3-2.0/NOPB FAQ
1.How can I place an order for LM4050QAEM3-2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QAEM3-2.0/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 LM4050QAEM3-2.0/NOPB reliable?
The price and inventory of LM4050QAEM3-2.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QAEM3-2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QAEM3-2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QAEM3-2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QAEM3-2.0/NOPB?
LM4050QAEM3-2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QAEM3-2.0/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 LM4050QAEM3-2.0/NOPB?
For technical support, including LM4050QAEM3-2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QAEM3-2.0/NOPB requirements.
6.How does Aetrix verify that LM4050QAEM3-2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QAEM3-2.0/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 LM4050QAEM3-2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QAEM3-2.0/NOPB?
All LM4050QAEM3-2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QAEM3-2.0/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 LM4050QAEM3-2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4050QAEM3-2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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