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Texas Instruments LM4050QAIM3-5.0/NOPB
- Part No.:
- LM4050QAIM3-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QAIM3-5.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,669
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Product details
Overview
LM4050QAIM3-5.0/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 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, supports capacitive loads without external stabilization, and targets high-accuracy analog signal chains in automotive and industrial environments.
For engineers reviewing the LM4050QAIM3-5.0/NOPB datasheet, LM4050QAIM3-5.0/NOPB pinout, LM4050QAIM3-5.0/NOPB application, or LM4050QAIM3-5.0/NOPB equivalent, this page provides verified specifications, validated pin functions, confirmed automotive-grade thermal and stability performance, and two rigorously cross-referenced alternative parts for design-in flexibility.
Technical Context
The LM4050QAIM3-5.0/NOPB uses bandgap-based Zener-zap trimmed shunt topology with curvature-corrected temperature drift compensation. Its dynamic impedance remains ≤0.5 Ω at 1 mA (120 Hz), enabling stable regulation under varying load currents from 56 μA to 15 mA.
It achieves ±0.1% output voltage tolerance at 25°C and maintains ≤±50 ppm/°C tempco over −40°C to +125°C, with long-term stability of 120 ppm after 1000 hours and thermal hysteresis of 1.4 mV across −40°C ↔ 125°C cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal reverse breakdown voltage, fixed and factory-trimmed - eliminates need for external feedback or adjustment. |
| Initial Tolerance | ±0.1% at 25°C (A grade) - enables high-accuracy ADC/DAC reference without calibration. |
| Tempco | ≤50 ppm/°C over −40°C to +125°C - ensures <±1.3 mV drift across full automotive extended range. |
| Operating Current | 56 μA min to 15 mA max - supports ultra-low-power sensor nodes and robust industrial supply monitoring. |
| Noise (10 Hz–10 kHz) | 41 μVrms typical - suitable for 16-bit+ data acquisition systems without additional filtering. |
| Dynamic Impedance | 0.5 Ω max at 1 mA, 120 Hz - minimizes load-induced voltage variation in precision current-sense applications. |
| Long-Term Stability | 120 ppm after 1000 hrs - ensures reference integrity over multi-year automotive ECU deployments. |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, 3-pin surface-mount configuration with exposed pad not present. Anode (Pin 2) connects to system ground; Cathode (Pin 1) carries shunt current and sets regulated voltage node; Pin 3 is NC (no internal connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage sense node | Connects to regulated voltage rail; sinks all excess current to maintain precise 5.0 V at cathode-to-anode potential. |
| Anode (Pin 2) | Reference ground return | Must be connected to system ground; forms the 0 V reference for the 5.0 V output at cathode. |
| NC (Pin 3) | No internal connection | Left floating per datasheet; no routing or soldering required - avoids unintended parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable operation with any capacitive load up to 10 μF - reduces BOM count and PCB area in space-constrained modules. |
| AEC-Q100 Grade 1 qualification | Rated for −40°C to +125°C ambient operation with full electrical characterization - meets automotive powertrain and ADAS requirements. |
| Fuse and Zener-zap voltage trim | Wafer-sort trimming ensures ±0.1% initial accuracy without post-package calibration - improves production yield and test efficiency. |
| Tolerates capacitive loads | Stable under >100 pF to 10 μF load capacitance - supports direct interface with ADC input caps, op-amp feedback networks, and LDO bypass stages. |
| Low quiescent current | 56 μA minimum operating current - enables use in always-on battery-backed circuits with multi-year runtime. |
Applications
| Automotive Engine Control Unit (ECU) | Portable Medical Sensor Module |
|---|---|
Use Scenario: Precision analog front-end for oxygen sensor and knock sensor signal conditioning in engine management systems. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 5.0 V bias for instrumentation amplifiers and 16-bit SAR ADCs. Use Value: Maintains <±1.3 mV output drift over −40°C to +125°C ambient, ensuring consistent sensor measurement accuracy across vehicle lifetime. |
Use Scenario: Battery-powered wearable ECG monitor requiring low-noise, long-life voltage reference for analog signal chain. IC Role / Device Role / Timing Role: Primary reference for 16-bit delta-sigma ADC and low-power op-amp buffers. Use Value: 41 μVrms noise and 56 μA minimum current enable >100 dB SNR and multi-year operation on coin-cell batteries. |
| Industrial Process Transmitter | Energy Meter Reference Subsystem |
Use Scenario: 4–20 mA loop-powered field transmitter measuring pressure/temperature in hazardous environments. IC Role / Device Role / Timing Role: Stable 5.0 V reference for DAC output stage and sensor excitation circuitry. Use Value: 120 ppm long-term stability and ≤0.5 Ω dynamic impedance ensure metrology-grade accuracy over 15+ year service life. |
Use Scenario: Polyphase electricity meter requiring high-accuracy voltage reference for anti-tampering energy measurement. IC Role / Device Role / Timing Role: Reference source for 24-bit sigma-delta ADC sampling voltage and current channels. Use Value: ±0.1% initial tolerance and 50 ppm/°C tempco meet IEC 62053-21 Class 0.2 accuracy requirements across temperature extremes. |
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 output, ±0.5% initial tolerance (C grade), 100 ppm/°C max tempco, SOT-23 package | Lower accuracy and higher drift - suitable for cost-sensitive non-automotive industrial controls | Select when AEC-Q100 qualification and ±0.1% tolerance are not required; offers lower unit cost. |
| MAX6005BESA+ | 5.0 V output, ±0.2% initial tolerance (B grade), 75 ppm/°C max tempco, SO-8 package | Larger footprint, higher thermal mass - better for high-reliability but non-automotive applications with board space margin | Choose when SO-8 handling or higher power dissipation margin (500 mW) is needed; not automotive-qualified. |
Compared with TL4050C50IDBZR and MAX6005BESA+, the LM4050QAIM3-5.0/NOPB uniquely delivers AEC-Q100 Grade 1 compliance, ±0.1% tolerance, and 50 ppm/°C tempco in the miniature SOT-23 package - making it the only option meeting stringent automotive safety-critical reference requirements without layout or qualification compromise.
Availability
LM4050QAIM3-5.0/NOPB is available at Aetrix Electronics and suitable for automotive engine control units, portable medical sensors, industrial process transmitters, and energy meter reference subsystems requiring stable component supply with guaranteed long-term availability.
Supply support for LM4050QAIM3-5.0/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 specializing in analog and embedded processing technologies, with leadership in precision analog ICs and automotive-grade components.
The LM4050-N/-Q1 product line was designed specifically for high-accuracy, low-power shunt reference applications in automotive, industrial, and portable equipment where space, stability, and qualification rigor are critical.
FAQ
What is the maximum operating current for LM4050QAIM3-5.0/NOPB?
The LM4050QAIM3-5.0/NOPB supports a maximum operating current of 15 mA. This upper limit ensures safe power dissipation within the SOT-23 package's thermal limits while maintaining regulation accuracy. Exceeding 15 mA risks exceeding the 280 mW absolute maximum power rating at 25°C ambient, potentially degrading long-term stability or causing thermal shutdown in unventilated layouts.
Does LM4050QAIM3-5.0/NOPB require an external capacitor for stability?
No, the LM4050QAIM3-5.0/NOPB does not require an external output capacitor for stability. Its internal design tolerates capacitive loads from 0 to 10 μF without oscillation or phase margin degradation. This eliminates capacitor-related BOM cost, PCB area, and aging concerns - a key advantage over older shunt references like TL431 that mandate minimum 10 nF ceramic capacitance.
Is LM4050QAIM3-5.0/NOPB qualified for automotive applications?
Yes, LM4050QAIM3-5.0/NOPB is AEC-Q100 Grade 1 qualified, rated for operation from −40°C to +125°C ambient temperature, and manufactured on an automotive-grade flow. It meets automotive reliability, ESD (±2000 V HBM), and long-term stability requirements - making it suitable for engine control, ADAS, and body electronics where functional safety is mandated.
What is the minimum operating current for LM4050QAIM3-5.0/NOPB at 25°C?
The minimum operating current for LM4050QAIM3-5.0/NOPB is 56 μA at 25°C. Below this threshold, the device exits regulation and output voltage collapses. This value is specified for the 5.0 V version and increases for higher-voltage variants (e.g., 74 μA for 8.192 V); it defines the lowest usable current in ultra-low-power wake-up or standby circuits.
How does the temperature coefficient of LM4050QAIM3-5.0/NOPB impact system accuracy?
The LM4050QAIM3-5.0/NOPB has a maximum temperature coefficient of 50 ppm/°C over −40°C to +125°C. Over this full range, output drift is bounded to ±1.3 mV (5.0 V × 50 ppm/°C × 165°C ΔT), directly limiting absolute accuracy in uncalibrated systems. This spec enables designs to meet Class 0.2 energy meter or ASIL-B sensor accuracy without software compensation.
LM4050QAIM3-5.0/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
LM4050QAIM3-5.0/NOPB FAQ
1.How can I place an order for LM4050QAIM3-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QAIM3-5.0/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 LM4050QAIM3-5.0/NOPB reliable?
The price and inventory of LM4050QAIM3-5.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QAIM3-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QAIM3-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QAIM3-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QAIM3-5.0/NOPB?
LM4050QAIM3-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QAIM3-5.0/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 LM4050QAIM3-5.0/NOPB?
For technical support, including LM4050QAIM3-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QAIM3-5.0/NOPB requirements.
6.How does Aetrix verify that LM4050QAIM3-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QAIM3-5.0/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 LM4050QAIM3-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QAIM3-5.0/NOPB?
All LM4050QAIM3-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QAIM3-5.0/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 LM4050QAIM3-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM4050QAIM3-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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