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Texas Instruments LM4050QAIM3-2.0/NOPB
- Part No.:
- LM4050QAIM3-2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QAIM3-2.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,958
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Product details
Overview
LM4050QAIM3-2.0/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 battery-powered instrumentation.
For engineers reviewing the LM4050QAIM3-2.0/NOPB datasheet, LM4050QAIM3-2.0/NOPB pinout, LM4050QAIM3-2.0/NOPB application, or LM4050QAIM3-2.0/NOPB equivalent, key selection criteria include initial accuracy at 25°C, thermal hysteresis (0.7 mV), dynamic impedance (0.3 Ω), long-term stability (120 ppm), and AEC-Q100 Grade 1 qualification for automotive use.
Technical Context
The LM4050QAIM3-2.0/NOPB implements a curvature-corrected bandgap reference architecture with Zener-zap trim for ±0.1% initial accuracy. Its internal compensation eliminates need for external output capacitors while maintaining stability across capacitive loads.
It operates as a two-terminal shunt regulator: cathode accepts input current, anode connects to ground, and NC pin (pin 3) must be left floating or tied to anode. Reverse breakdown voltage is fixed at 2.048 V, with minimum operating current of 60 μA (25°C) and 65 μA (−40°C to 125°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal; enables exact 1 mV LSB scaling for 11-bit systems with 2 V full-scale range. |
| Initial Accuracy | ±0.1% max at 25°C (A grade); ensures ≤ ±2.048 mV absolute error before temperature or aging effects. |
| Temp Coefficient | ≤50 ppm/°C max over −40°C to 125°C; contributes ≤ ±3.17 mV drift across full automotive range. |
| Noise (10 Hz–10 kHz) | 41 μVrms typical; supports 16-bit effective resolution in low-noise data acquisition front-ends. |
| Dynamic Impedance | 0.3 Ω at 1 mA / 120 Hz; minimizes load-induced voltage shift during fast current transients. |
| Operating Current Range | 60 μA to 15 mA; allows ultra-low-power sensor biasing and robust regulation under varying load conditions. |
| Thermal Hysteresis | 0.7 mV max (−40°C ↔ 125°C cycling); limits repeatability error in precision calibration sequences. |
| Long-Term Stability | 120 ppm after 1000 hrs; corresponds to ~0.25 mV drift over 1 year in continuous operation. |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, 3-pin surface-mount configuration. Pin 3 is no-connect (NC) and must remain floating or be tied to pin 2 per TI layout guidance for EMI-sensitive environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage regulation node | Accepts total current (IQ + IL); voltage develops between this pin and anode; requires series resistor (RS) for current limiting. |
| Anode (Pin 2) | Reference ground / common return | Must be connected to system ground; serves as the 0 V reference point for regulated 2.048 V output. |
| NC (Pin 3) | No internal connection | Die attach interface contact; leave unconnected or tie to pin 2 to reduce EMI susceptibility near transformers or switching noise sources. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 2.048 V output | Matches binary-weighted 12-bit full-scale (211 = 2048) for seamless LSB = 1 mV scaling in 2 V-range ADCs/DACs. |
| No output capacitor required | Internally compensated design eliminates external stabilization cap, reducing BOM count and PCB area in space-constrained modules. |
| AEC-Q100 Grade 1 qualified | Rated for −40°C to 125°C operation with automotive-grade process flow, supporting engine control, ADAS sensors, and infotainment power rails. |
| Tolerates capacitive loads | Maintains stability with any value of output capacitance-enables direct decoupling of downstream op-amps or ADC reference inputs. |
| Low micropower operation | 60 μA minimum cathode current enables >10-year battery life in coin-cell–powered portable meters and IoT edge nodes. |
Applications
| Battery-Powered Instrumentation | Automotive Sensor Signal Conditioning |
|---|---|
Use Scenario: Portable multimeter measuring DC voltage with 0.1% accuracy requirement and 10-year shelf life on CR2032 cell. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.048 V reference for 16-bit SAR ADC and analog front-end gain stages. Use Value: 60 μA min operating current extends battery life beyond 10 years; ±0.1% initial tolerance and 50 ppm/°C TC ensure field calibration validity across temperature. |
Use Scenario: Tire pressure monitoring system (TPMS) ECU converting piezoresistive bridge output with <100 ppm total error budget. IC Role / Device Role / Timing Role: Precision voltage reference for ratiometric excitation of MEMS pressure sensor bridge and ADC reference input. Use Value: AEC-Q100 Grade 1 rating guarantees operation at 125°C under hood; 0.7 mV thermal hysteresis prevents calibration drift after thermal cycling. |
| Industrial Process Transmitter | Energy Meter Reference Subsystem |
Use Scenario: 4–20 mA loop-powered temperature transmitter requiring 0.05% total measurement uncertainty over −40°C to 85°C. IC Role / Device Role / Timing Role: Primary shunt reference for 24-bit delta-sigma ADC and isolated DAC feedback path. Use Value: 41 μVrms noise enables >110 dB SNR; 120 ppm long-term stability reduces annual recalibration frequency in field-deployed units. |
Use Scenario: Class 0.2 polyphase electricity meter needing stable reference for metrology-grade ADCs across wide supply and temperature ranges. IC Role / Device Role / Timing Role: Low-drift 2.048 V reference for anti-aliasing filter biasing and ADC reference rail in isolation barrier interface. Use Value: 0.3 Ω dynamic impedance prevents reference droop during high-frequency current sampling; SOT-23 footprint eases creepage/clearance compliance. |
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 accuracy, 50 ppm/°C TC, 25 μVrms noise, 50 μA min current - lower noise but looser initial tolerance than LM4050QAIM3-2.0/NOPB. | Not AEC-Q100 qualified; suited for industrial/commercial, not automotive safety-critical subsystems. | Select when lower noise dominates over initial accuracy and automotive qualification is unnecessary. |
| ADR3420ARJZ-R7 | 2.048 V, ±0.1% initial accuracy, 30 ppm/°C TC, 35 μVrms noise, 100 μA min current - tighter TC and lower noise, but higher minimum current limits ultra-low-power use. | Requires external capacitor for stability; not optimized for direct capacitive-load drive without added components. | Select when tighter temperature drift and lower noise justify higher quiescent current and added layout complexity. |
Compared with REF3020AIDBZR and ADR3420ARJZ-R7, LM4050QAIM3-2.0/NOPB uniquely combines AEC-Q100 Grade 1 qualification, capacitor-free stability, and 60 μA minimum current - making it optimal for automotive and battery-constrained precision systems where layout simplicity and qualification rigor are mandatory.
Availability
LM4050QAIM3-2.0/NOPB is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive sensor signal conditioning, industrial process transmitters, and energy meter reference subsystems requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for LM4050QAIM3-2.0/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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The LM4050-N/Q1 product line delivers precision shunt references optimized for space-constrained, high-accuracy applications including automotive sensors, portable test equipment, and smart metering - with emphasis on low drift, micropower operation, and automotive qualification.
FAQ
What is the maximum operating current for LM4050QAIM3-2.0/NOPB?
The LM4050QAIM3-2.0/NOPB supports a maximum cathode current of 15 mA. Exceeding this limit risks thermal overstress and permanent degradation. Derating is required above 25°C ambient per its 287°C/W junction-to-ambient thermal resistance; at 85°C ambient, max safe dissipation drops to ~227 mW. Always verify power dissipation using (VS − 2.048 V) × IR in shunt regulator designs.
Is LM4050QAIM3-2.0/NOPB pin-compatible with other LM4050 variants?
Yes - all LM4050xIM3-x.x/NOPB variants share identical SOT-23 (DBZ) pinout: cathode on pin 1, anode on pin 2, and NC on pin 3. The LM4050QAIM3-2.0/NOPB maintains mechanical and electrical compatibility with LM4050AIM3-2.5/NOPB, LM4050AIM3-4.1/NOPB, and others in the family, enabling voltage-scaling flexibility without PCB redesign.
Does LM4050QAIM3-2.0/NOPB require an external capacitor for stability?
No - the LM4050QAIM3-2.0/NOPB is internally compensated and stable without any output capacitor. It tolerates arbitrary capacitive loads, including direct connection to ADC reference inputs or op-amp bias nodes. Adding a bypass capacitor (e.g., 100 nF ceramic) is optional and does not affect stability, but may improve high-frequency PSRR in noisy environments.
What is the thermal hysteresis specification for LM4050QAIM3-2.0/NOPB?
The LM4050QAIM3-2.0/NOPB exhibits ≤0.7 mV thermal hysteresis, defined as the voltage difference measured at 25°C after cycling from −40°C and from 125°C. This parameter reflects mechanical stress-induced shifts in the silicon die and package interface, and is critical for applications requiring repeatable calibration after thermal exposure - such as automotive ECUs and field-serviceable test gear.
How does the LM4050QAIM3-2.0/NOPB achieve ±0.1% initial accuracy?
The LM4050QAIM3-2.0/NOPB achieves ±0.1% initial accuracy via fuse and Zener-zap trimming during wafer sort, followed by post-trim verification at 25°C. This process targets the A-grade tolerance band (±2.048 mV) and is validated across production lots. Accuracy degrades predictably with temperature (≤50 ppm/°C) and operating current (≤0.8 mV change from 60 μA to 1 mA), both specified in the Electrical Characteristics table.
LM4050QAIM3-2.0/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
LM4050QAIM3-2.0/NOPB FAQ
1.How can I place an order for LM4050QAIM3-2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QAIM3-2.0/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 LM4050QAIM3-2.0/NOPB reliable?
The price and inventory of LM4050QAIM3-2.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QAIM3-2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QAIM3-2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QAIM3-2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QAIM3-2.0/NOPB?
LM4050QAIM3-2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QAIM3-2.0/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 LM4050QAIM3-2.0/NOPB?
For technical support, including LM4050QAIM3-2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QAIM3-2.0/NOPB requirements.
6.How does Aetrix verify that LM4050QAIM3-2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QAIM3-2.0/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 LM4050QAIM3-2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QAIM3-2.0/NOPB?
All LM4050QAIM3-2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QAIM3-2.0/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 LM4050QAIM3-2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4050QAIM3-2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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