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Texas Instruments LM4050QAEM3-5.0/NOPB
- Part No.:
- LM4050QAEM3-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QAEM3-5.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,756
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Product details
Overview
LM4050QAEM3-5.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a fixed 5.0 V reverse breakdown voltage with ±0.1% initial tolerance (A-grade), 50 ppm/°C max temperature coefficient, and 93 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 while tolerating capacitive loads - ideal for high-accuracy ADC/DAC biasing in space-constrained industrial and automotive systems.
For engineers reviewing the LM4050QAEM3-5.0/NOPB datasheet, LM4050QAEM3-5.0/NOPB pinout, LM4050QAEM3-5.0/NOPB application, or LM4050QAEM3-5.0/NOPB equivalent, this page delivers verified specifications, validated pin functions, confirmed thermal and noise performance, and real-world implementation context for precision analog design, battery-powered instrumentation, and AEC-Q100-compliant automotive subsystems.
Technical Context
The LM4050QAEM3-5.0/NOPB implements a curvature-corrected bandgap shunt architecture with internal Zener-zap trim for ±0.1% accuracy at 25°C. Its dynamic impedance is 0.5 Ω at 1 mA/120 Hz, enabling stable regulation under varying load current (60 μA–15 mA) without external compensation.
Designed for extended temperature operation (−40°C to 125°C), it features 50 ppm/°C max tempco, 1.4 mV thermal hysteresis (−40°C ↔ 125°C), and 120 ppm long-term stability after 1000 hours - all validated per AEC-Q100 Grade 1 requirements for automotive electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal reverse breakdown voltage at 100 μA - sets precise reference for 12-bit ADCs with ~1.22 mV LSB when supplied from 5 V rail. |
| Initial Tolerance | ±0.1% (A-grade) at 25°C - enables single-point calibration elimination in production test for high-yield precision systems. |
| Tempco | ≤50 ppm/°C over −40°C to 125°C - ensures ≤±2.5 mV drift across full automotive temperature range. |
| Noise (10 Hz–10 kHz) | 93 μVrms typical - supports <16-bit ENOB in low-frequency data acquisition without external filtering. |
| Operating Current Range | 60 μA to 15 mA - allows ultra-low-power sensor biasing and robust regulation under dynamic load conditions. |
| Dynamic Impedance | 0.5 Ω at 1 mA/120 Hz - minimizes output voltage shift during transient load changes in closed-loop feedback circuits. |
| Thermal Hysteresis | 1.4 mV (−40°C ↔ 125°C cycling) - quantifies repeatable voltage offset after thermal stress, critical for metrology-grade repeatability. |
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 internally 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 develops between Cathode and Anode per Zener breakdown characteristic. |
| Anode (Pin 2) | Reference ground / common return | Internally tied to substrate; must be connected to system ground to establish 5.0 V reference potential at Cathode. |
| NC (Pin 3) | No internal connection | Die attach interface contact - left floating or tied to Pin 2 in EMI-sensitive layouts to suppress coupling from adjacent switching nodes. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5.0 V output | Eliminates external resistor divider, reducing BOM count and layout area in compact PCBs for portable instrumentation. |
| No output capacitor required | Internal compensation enables stable operation with zero external capacitance - simplifies layout and avoids capacitor aging effects on long-term drift. |
| Tolerates capacitive loads | Stable into any value of parallel capacitance (e.g., ADC input caps, PCB trace capacitance), preventing oscillation in mixed-signal systems. |
| AEC-Q100 Grade 1 qualified | Validated for automotive ambient temperatures (−40°C to 125°C) and lifetime reliability - suitable for engine control, ADAS sensor modules, and infotainment power rails. |
| Micropower operation | 60 μA minimum cathode current enables >10-year battery life in wireless sensor nodes using coin-cell or Li-SOCl₂ sources. |
Applications
| Battery-Powered Precision Instrumentation | Automotive Sensor Signal Conditioning |
|---|---|
Use Scenario: Portable multimeter or handheld gas analyzer requiring stable 5 V reference for 16-bit SAR ADC sampling. IC Role / Device Role / Timing Role: Shunt voltage reference establishing absolute scale for analog front-end gain and offset calibration. Use Value: ±0.1% initial tolerance and 50 ppm/°C tempco ensure <±0.5 LSB error across operating temperature without recalibration. |
Use Scenario: Pressure or temperature sensor module in powertrain control unit with CAN interface and 125°C ambient requirement. IC Role / Device Role / Timing Role: Precision bias source for op-amp signal conditioning and ADC reference in engine control ECU. Use Value: AEC-Q100 Grade 1 qualification and 120 ppm long-term stability guarantee measurement integrity over 15-year vehicle lifecycle. |
| Industrial Process Control Transmitters | Energy Metering Reference Subsystem |
Use Scenario: 4–20 mA loop-powered transmitter with HART modulation, where supply headroom is limited to 8 V. IC Role / Device Role / Timing Role: Low-current shunt reference enabling accurate current loop scaling with minimal dropout. Use Value: 60 μA min operating current allows reliable regulation even at 7.5 V supply, maximizing usable headroom. |
Use Scenario: Class 0.2 smart electricity meter requiring metrology-grade voltage reference for polyphase energy calculation. IC Role / Device Role / Timing Role: Primary reference for isolated sigma-delta ADC measuring grid voltage with <50 μVrms noise floor. Use Value: 93 μVrms noise and 1.4 mV thermal hysteresis meet IEC 62053-22 accuracy requirements for revenue-grade metering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5050IDBZR | Series reference (not shunt); 5.0 V, ±0.05% initial accuracy, 3 μVrms noise, requires 1.2 mA quiescent current. | Requires higher supply headroom (>6.2 V) and external bypass cap; unsuitable for low-headroom or ultra-low-power shunt topologies. | Select when ultra-low noise and tighter initial accuracy outweigh supply constraints and layout simplicity. |
| TL431CDBZR | Adjustable shunt reference; 2.5 V base, ±1% initial tolerance, 200 ppm/°C tempco, 25 μVrms noise, 1 mA min current. | Requires two external resistors for 5 V setting; lower accuracy and higher tempco limit use in high-stability metrology. | Select for cost-sensitive, non-critical applications where ±1% tolerance and manual resistor trimming are acceptable. |
Compared with REF5050IDBZR and TL431CDBZR, the LM4050QAEM3-5.0/NOPB uniquely balances AEC-Q100 qualification, micropower operation (60 μA), and ±0.1% accuracy in a no-resistor, no-capacitor shunt topology - making it optimal for space- and power-constrained automotive and portable precision systems where layout simplicity and thermal stability are prioritized over sub-10 μV noise.
Availability
LM4050QAEM3-5.0/NOPB is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive sensor modules, industrial process transmitters, and energy metering systems requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4050QAEM3-5.0/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 leader specializing in analog, embedded processing, and connectivity technologies, with decades of leadership in precision analog ICs and automotive-qualified components.
The LM4050-N family was designed specifically for space-constrained, high-accuracy shunt reference applications demanding micropower operation, low noise, and extended temperature reliability - targeting industrial, medical, and automotive subsystems where board area and thermal stability are critical.
FAQ
What is the maximum operating current for LM4050QAEM3-5.0/NOPB?
The LM4050QAEM3-5.0/NOPB supports a maximum operating current of 15 mA. This limit ensures safe junction temperature operation within the SOT-23 package's thermal constraints (RθJA = 287°C/W) up to 125°C ambient. Exceeding 15 mA risks permanent damage per Absolute Maximum Ratings, and design must ensure series resistor sizing prevents overshoot during worst-case supply/load transients.
Does LM4050QAEM3-5.0/NOPB require an external capacitor for stability?
No, the LM4050QAEM3-5.0/NOPB is internally compensated and does not require an external output capacitor for stability. It remains stable with any capacitive load, including ADC input capacitance or PCB trace capacitance. Adding a bypass capacitor is optional and does not degrade performance - but provides no stability benefit beyond what is already achieved by the internal design.
What is the thermal hysteresis specification for LM4050QAEM3-5.0/NOPB?
The LM4050QAEM3-5.0/NOPB exhibits 1.4 mV thermal hysteresis, defined as the voltage shift measured at 25°C after cycling between −40°C and 125°C. This parameter reflects mechanical stress-induced offset in the silicon/package interface and is critical for applications requiring repeatable measurements after environmental temperature excursions, such as field-deployed calibration equipment.
Is LM4050QAEM3-5.0/NOPB qualified for automotive applications?
Yes, LM4050QAEM3-5.0/NOPB is AEC-Q100 Grade 1 qualified (−40°C to 125°C), manufactured on an automotive-grade flow, and specified for use in automotive electronics including engine control units, ADAS sensors, and infotainment power management. Its qualification covers stress testing for temperature cycling, humidity, and long-term reliability per automotive standards.
How does the minimum operating current vary with temperature for LM4050QAEM3-5.0/NOPB?
The LM4050QAEM3-5.0/NOPB has a typical minimum operating current of 74 μA at 25°C and 90 μA across the full −40°C to 125°C range. This increase ensures stable regulation under worst-case thermal conditions. Designers must size the series resistor to deliver ≥90 μA to the cathode even at maximum temperature and minimum supply voltage to maintain reference accuracy.
LM4050QAEM3-5.0/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:
- Active
- 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:
- 90 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050QAEM3-5.0/NOPB FAQ
1.How can I place an order for LM4050QAEM3-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QAEM3-5.0/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 LM4050QAEM3-5.0/NOPB reliable?
The price and inventory of LM4050QAEM3-5.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QAEM3-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QAEM3-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QAEM3-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QAEM3-5.0/NOPB?
LM4050QAEM3-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QAEM3-5.0/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 LM4050QAEM3-5.0/NOPB?
For technical support, including LM4050QAEM3-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QAEM3-5.0/NOPB requirements.
6.How does Aetrix verify that LM4050QAEM3-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QAEM3-5.0/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 LM4050QAEM3-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QAEM3-5.0/NOPB?
All LM4050QAEM3-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QAEM3-5.0/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 LM4050QAEM3-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM4050QAEM3-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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