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Texas Instruments LM4050QAIM3X5.0/NOPB
- Part No.:
- LM4050QAIM3X5.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QAIM3X5.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,116
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Product details
Overview
LM4050QAIM3X5.0/NOPB from Texas Instruments is an AEC-Q100 Grade 1 qualified precision micropower shunt voltage reference in SOT-23 package, delivering a stable 5.0 V nominal reverse breakdown voltage with ±0.1% initial tolerance (A grade), 50 ppm/°C max temperature coefficient, and 41 μVrms wideband noise (10 Hz–10 kHz). It operates from 56 μA to 15 mA over −40°C to 125°C and requires no output capacitor.
For engineers reviewing the LM4050QAIM3X5.0/NOPB datasheet, LM4050QAIM3X5.0/NOPB pinout, LM4050QAIM3X5.0/NOPB application, or LM4050QAIM3X5.0/NOPB equivalent, this device serves as a space-constrained, automotive-grade voltage reference for high-accuracy ADC biasing, sensor excitation, and closed-loop power supply feedback where low quiescent current and capacitive-load stability are critical.
Technical Context
The LM4050QAIM3X5.0/NOPB uses bandgap-based Zener-zap trimmed shunt topology with curvature-corrected temperature drift compensation, enabling stable 5.0 V reference performance across industrial and extended automotive temperature ranges. Its dynamic impedance remains below 0.5 Ω at 1 mA, supporting tight load regulation even under varying sink currents.
Unlike series references, it functions as a two-terminal shunt regulator: cathode accepts input current and sets reference voltage at anode (ground), with no internal connection on pin 3. It tolerates unlimited capacitive loads without oscillation due to intrinsic phase-margin design-eliminating external stabilization components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal reverse breakdown voltage, calibrated at 100 μA test current |
| Initial Tolerance | ±0.1% at 25°C (A grade), enabling direct use in 12-bit+ data acquisition without trimming |
| Temp Coefficient | ≤50 ppm/°C max over −40°C to 125°C, limiting drift to ±2.5 mV across full range |
| Operating Current | 56 μA min to 15 mA max-supports ultra-low-power sensor nodes and robust industrial loads |
| Output Noise | 41 μVrms (10 Hz–10 kHz), suitable for precision 16-bit SAR ADC reference applications |
| Dynamic Impedance | 0.5 Ω typical at 1 mA, ensuring <8 mV load regulation error from 1 mA to 15 mA |
| Long-Term Stability | 120 ppm after 1000 hours, supporting >10-year calibration retention in sealed modules |
Pinout & Package
SOT-23 (DBZ) package: 3-pin surface-mount, 2.92 mm × 1.30 mm body size, JEDEC MO-178AC compliant. Pin 1 = Cathode (input/sink), Pin 2 = Anode (output/ground), Pin 3 = NC (no internal connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Current sink terminal | Accepts input current; voltage develops across external resistor to set reference node |
| Anode (Pin 2) | Reference output / ground return | Provides stable 5.0 V relative to system ground; must be connected to GND |
| NC (Pin 3) | No internal connection | Must remain unconnected-floating or tied to ground has no functional impact |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive applications up to +125°C junction temperature |
| No output capacitor required | Stable operation with any capacitive load-reduces BOM count and board area |
| Low 41 μVrms noise | Enables high-resolution analog signal chains without additional filtering |
| Wide 56 μA–15 mA operating range | Supports both battery-powered microcontrollers and high-current DAC buffers |
| 50 ppm/°C max tempco | Meets accuracy requirements for industrial process control transmitters |
Applications
| Portable Medical Sensors | Automotive Battery Monitoring |
|---|---|
Use Scenario: Wearable ECG front-end with 16-bit ADC sampling at 1 kSPS on coin-cell power. IC Role / Device Role / Timing Role: Shunt reference providing stable 5.0 V bias for ADC reference input and op-amp rail-splitting. Use Value: 56 μA minimum current enables >3-year runtime; ±0.1% tolerance eliminates factory calibration step. |
Use Scenario: 12 V lead-acid battery voltage monitoring in engine control unit with CAN reporting. IC Role / Device Role / Timing Role: Precision shunt reference for MCU's internal ADC measuring scaled battery voltage. Use Value: AEC-Q100 Grade 1 rating ensures reliability at 125°C ambient; 50 ppm/°C tempco keeps measurement error <±10 mV over full vehicle thermal range. |
| Industrial Data Loggers | Precision Thermocouple Amplifiers |
Use Scenario: Remote environmental logger using LoRaWAN, powered by solar-charged Li-ion. IC Role / Device Role / Timing Role: Reference source for sigma-delta ADC digitizing RTD and humidity sensors. Use Value: 120 ppm long-term stability allows annual recalibration only; no capacitor needed simplifies conformal coating. |
Use Scenario: Isolated thermocouple interface module with cold-junction compensation. IC Role / Device Role / Timing Role: Stable 5.0 V reference for instrumentation amplifier gain-setting and ADC reference. Use Value: 41 μVrms noise prevents degradation of thermocouple microvolt-level resolution; SOT-23 footprint saves space in isolated PCB sections. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C50IDBZR | Same 5.0 V, ±0.5% initial tolerance (C grade), 100 ppm/°C max tempco, non-automotive qualified | Lacks AEC-Q100 qualification; not suitable for under-hood automotive use | Select when cost sensitivity outweighs automotive compliance and tighter accuracy is unnecessary |
| MAX6005EUR+T | 5.0 V, ±0.2% initial tolerance, 75 ppm/°C max tempco, 65 μVrms noise, SOT-23-3 | Higher noise and tempco; no AEC-Q100 rating; different pinout (cathode/anode swapped) | Use only if legacy MAXIM design reuse is required-requires PCB layout change due to reversed pinout |
Compared with TL4050C50IDBZR and MAX6005EUR+T, the LM4050QAIM3X5.0/NOPB delivers superior accuracy (±0.1%), lower drift (50 ppm/°C), lower noise (41 μVrms), and automotive qualification-making it the sole choice for safety-critical or high-reliability 5 V shunt reference applications requiring zero layout changes.
Availability
LM4050QAIM3X5.0/NOPB is available at Aetrix Electronics and suitable for automotive battery management, portable medical instrumentation, industrial data loggers, and precision sensor signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4050QAIM3X5.0/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 decades of expertise in precision voltage references and automotive-grade ICs.
The LM4050-N/-Q1 product line was designed specifically for space-constrained, high-accuracy applications demanding micropower operation, capacitive-load immunity, and automotive reliability-targeting sensor interfaces, data acquisition, and closed-loop power systems.
FAQ
What is the minimum operating current for LM4050QAIM3X5.0/NOPB?
The LM4050QAIM3X5.0/NOPB requires a minimum operating current of 56 μA at 25°C, rising to 80 μA across the industrial temperature range (−40°C to 85°C) and 90 μA across the extended automotive range (−40°C to 125°C). This low current enables multi-year operation in battery-powered systems while maintaining ±0.1% output accuracy.
Is LM4050QAIM3X5.0/NOPB pin-compatible with standard LM4050 variants?
Yes, the LM4050QAIM3X5.0/NOPB uses the same SOT-23 (DBZ) package and identical pinout as all LM4050-N and LM4050-N-Q1 variants: Pin 1 = Cathode, Pin 2 = Anode, Pin 3 = NC. No PCB layout change is required when upgrading from industrial-grade LM4050AIM3X5.0 to the AEC-Q100 qualified LM4050QAIM3X5.0/NOPB.
Does LM4050QAIM3X5.0/NOPB require an output capacitor?
No, the LM4050QAIM3X5.0/NOPB does not require an output capacitor. Its internal design ensures stability with any capacitive load-including large bulk capacitors used in automotive or industrial power domains-eliminating risk of oscillation and reducing bill-of-materials cost and board area.
What is the thermal hysteresis specification for LM4050QAIM3X5.0/NOPB?
The LM4050QAIM3X5.0/NOPB exhibits ≤1.4 mV thermal hysteresis over a −40°C to 125°C temperature cycle, measured as the voltage difference at 25°C before and after extreme-temperature exposure. This low hysteresis supports repeatable measurements in cyclic thermal environments such as engine bay electronics or outdoor industrial enclosures.
How does LM4050QAIM3X5.0/NOPB achieve its 50 ppm/°C temperature coefficient?
The LM4050QAIM3X5.0/NOPB achieves ≤50 ppm/°C max temperature coefficient through integrated bandgap reference architecture with curvature-correction circuitry and Zener-zap wafer-level trimming. This design actively compensates for second-order thermal effects across −40°C to 125°C, ensuring predictable, monotonic drift behavior critical for metrology-grade applications.
LM4050QAIM3X5.0/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:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 93µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 80 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050QAIM3X5.0/NOPB FAQ
1.How can I place an order for LM4050QAIM3X5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QAIM3X5.0/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 LM4050QAIM3X5.0/NOPB reliable?
The price and inventory of LM4050QAIM3X5.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QAIM3X5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QAIM3X5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QAIM3X5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QAIM3X5.0/NOPB?
LM4050QAIM3X5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QAIM3X5.0/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 LM4050QAIM3X5.0/NOPB?
For technical support, including LM4050QAIM3X5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QAIM3X5.0/NOPB requirements.
6.How does Aetrix verify that LM4050QAIM3X5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QAIM3X5.0/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 LM4050QAIM3X5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QAIM3X5.0/NOPB?
All LM4050QAIM3X5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QAIM3X5.0/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 LM4050QAIM3X5.0/NOPB part is unused and in its original packaging.
Return procedure for LM4050QAIM3X5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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