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Texas Instruments LM4050QAEM3X4.1/NOPB
- Part No.:
- LM4050QAEM3X4.1/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QAEM3X4.1/NOPB.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
LM4050QAEM3X4.1/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a fixed 4.096 V reverse breakdown voltage with ±4.1 mV (±0.1%) initial tolerance at 25°C, 50 ppm/°C max temperature coefficient, and 93 μVrms wideband noise (10 Hz–10 kHz). It operates from 68 μA to 15 mA over −40°C to +125°C and requires no output capacitor-enabling stable regulation in battery-powered data-acquisition systems.
For engineers reviewing the LM4050QAEM3X4.1/NOPB datasheet, LM4050QAEM3X4.1/NOPB pinout, LM4050QAEM3X4.1/NOPB application, or LM4050QAEM3X4.1/NOPB equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, 4.096 V output optimized for 12-bit ADC/DAC LSB = 1 mV, low 0.5 Ω dynamic impedance, and compatibility with capacitive loads without external compensation.
Technical Context
The LM4050QAEM3X4.1/NOPB implements a curvature-corrected bandgap shunt reference architecture with Zener-zap trim at wafer sort, achieving ±0.1% accuracy (A grade) and <1.148 mV thermal hysteresis across −40°C to 125°C. Its internal compensation eliminates need for external stabilization capacitance while maintaining stability under all capacitive load conditions.
As a two-terminal device, it functions as a precision current-sink regulator: cathode draws operating current (68–15,000 μA), anode connects to ground, and output voltage develops across the cathode–anode terminals. The NC pin (Pin 3) must be left floating or tied to anode to avoid EMI-induced errors in high-noise environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal - enables exact 1 mV LSB for 5 V–supplied 12-bit converters |
| Initial Tolerance (25°C) | ±4.1 mV (±0.1%) - supports high-accuracy calibration without trimming |
| Temp. Coefficient | ≤50 ppm/°C - ensures ≤±0.21 mV drift over −40°C to +125°C |
| Operating Current Range | 68 μA to 15 mA - supports ultra-low-power sensor nodes and high-current reference buffers |
| Dynamic Impedance | 0.5 Ω at 1 mA - minimizes load-regulation error (<7 mV change over 1–15 mA) |
| Wideband Noise | 93 μVrms (10 Hz–10 kHz) - suitable for precision 16-bit SAR ADC references |
| Long-Term Stability | 120 ppm (1000 hrs) - maintains accuracy in metering and industrial control over time |
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 / voltage sense node | Carries total current (IQ + IL); voltage regulated relative to anode; must be driven via series resistor RS |
| Anode (Pin 2) | Reference ground / common return | Must connect directly to system ground plane; serves as 0 V reference for VOUT |
| NC (Pin 3) | No internal connection | Must remain unconnected or tied to Pin 2 to suppress EMI coupling in noisy environments |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 4.096 V output | Matches 12-bit converter full-scale range on 5 V supply (1 LSB = 1.22 mV → 4.096 V yields exactly 1 mV/LSB) |
| AEC-Q100 Grade 1 qualified | Validated for automotive powertrain and ADAS applications requiring operation from −40°C to +125°C |
| No output capacitor required | Internally compensated design eliminates external bypass cap, reducing BOM count and PCB area in space-constrained modules |
| Tolerates capacitive loads | Stable with any value of output capacitance - simplifies filtering for noise-sensitive analog front-ends |
| Low 68 μA min operating current | Enables use in always-on battery monitors and IoT edge sensors with multi-year runtime |
Applications
| Battery-Powered Data Loggers | Automotive Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Continuous voltage monitoring of Li-ion cell stacks in portable medical devices with 10-year shelf life requirements. IC Role / Device Role / Timing Role: Shunt reference providing stable 4.096 V基准 for 16-bit delta-sigma ADC measuring cell voltage with ±0.5 mV accuracy. Use Value: 93 μVrms noise and 50 ppm/°C TC ensure measurement repeatability across temperature cycling without recalibration. |
Use Scenario: Front-end reference for pressure and temperature sensors in engine control units (ECUs) operating at 125°C ambient. IC Role / Device Role / Timing Role: Precision voltage source for ratiometric sensor excitation and ADC reference in ASIL-B compliant subsystems. Use Value: AEC-Q100 Grade 1 qualification and 120 ppm long-term stability guarantee metrological integrity over 15-year vehicle lifetime. |
| Smart Energy Metering | Industrial Process Transmitters |
|
Use Scenario: Reference for polyphase energy meter ICs (e.g., ADE7953) measuring active/reactive power with 0.1% accuracy class compliance. IC Role / Device Role / Timing Role: Primary shunt reference supplying 4.096 V to metrology ADC and isolated sigma-delta modulators. Use Value: ±4.1 mV initial tolerance and <1.148 mV thermal hysteresis meet IEC 62053-22 Class 0.1 error budget for revenue-grade meters. |
Use Scenario: 4–20 mA loop-powered transmitter for flow and level sensing in hazardous-area refineries (ATEX Zone 1). IC Role / Device Role / Timing Role: Low-power voltage reference enabling 3.3 V microcontroller and 24-bit ADC operation from 4 mA loop current. Use Value: 68 μA minimum operating current allows full functionality down to 3.5 mA loop current, preserving diagnostic capability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF4132A41IDBVR | Series reference (not shunt); 4.096 V, ±0.05% initial accuracy; 30 ppm/°C TC; requires output capacitor | Higher accuracy but needs external cap and higher quiescent current (400 μA); unsuitable for ultra-low-IQ designs | Select when absolute initial accuracy > ±0.05% is mandatory and board space permits series topology |
| ADR3440ARJZ-R7 | Series reference; 4.096 V, ±0.1% initial accuracy; 30 ppm/°C TC; 120 μA IQ; requires 1 μF output cap | Lower noise (5.5 μVrms) but incompatible with shunt-based topologies and zero-capacitance layouts | Select for low-noise, high-stability applications where series architecture and layout flexibility allow external capacitor |
Compared with REF4132A41IDBVR and ADR3440ARJZ-R7, the LM4050QAEM3X4.1/NOPB offers unique advantages in shunt topology compatibility, zero-output-capacitor operation, and 68 μA minimum current-making it irreplaceable in loop-powered transmitters and space-constrained battery systems where series references cannot be substituted without circuit redesign.
Availability
LM4050QAEM3X4.1/NOPB is available at Aetrix Electronics and suitable for automotive sensor signal conditioning, smart energy metering, industrial process transmitters, and battery-powered data loggers requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LM4050QAEM3X4.1/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, specializing in analog and embedded processing technologies with leadership in precision analog ICs and automotive-grade components.
The LM4050-N series was designed specifically for high-accuracy, low-power shunt reference applications in space-constrained and thermally demanding environments-including automotive, industrial, and portable instrumentation systems.
FAQ
What is the maximum operating current for LM4050QAEM3X4.1/NOPB?
The LM4050QAEM3X4.1/NOPB supports a maximum operating current of 15 mA. This limit ensures safe junction temperature operation up to 125°C ambient when mounted on standard PCBs with typical thermal resistance (RθJA = 287°C/W). Exceeding 15 mA risks permanent damage per Absolute Maximum Ratings.
Does LM4050QAEM3X4.1/NOPB require an external capacitor for stability?
No, the LM4050QAEM3X4.1/NOPB is internally compensated and does not require an external output capacitor for stability. It remains stable with any capacitive load, including direct connection to ADC input capacitors or long PCB traces-reducing bill-of-materials and layout complexity.
What is the minimum operating current for LM4050QAEM3X4.1/NOPB at 25°C?
The LM4050QAEM3X4.1/NOPB has a typical minimum operating current of 68 μA at 25°C, with a guaranteed maximum of 74 μA across the industrial temperature range. Below this threshold, the device exits regulation and output voltage collapses.
Is LM4050QAEM3X4.1/NOPB qualified for automotive applications?
Yes, the LM4050QAEM3X4.1/NOPB is LM4050-N-Q1 variant and AEC-Q100 Grade 1 qualified, rated for operation from −40°C to +125°C and manufactured on an automotive-grade process flow-making it suitable for engine control, ADAS, and body electronics.
How does the NC pin (Pin 3) function on LM4050QAEM3X4.1/NOPB?
Pin 3 of the LM4050QAEM3X4.1/NOPB is a no-connect terminal with no internal bond wire. TI recommends leaving it floating or connecting it to Pin 2 (Anode) to mitigate electromagnetic interference in high-noise environments such as near switching regulators or motor drivers.
LM4050QAEM3X4.1/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):
- 4.096V
- 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:
- 78 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050QAEM3X4.1/NOPB FAQ
1.How can I place an order for LM4050QAEM3X4.1/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QAEM3X4.1/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 LM4050QAEM3X4.1/NOPB reliable?
The price and inventory of LM4050QAEM3X4.1/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QAEM3X4.1/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QAEM3X4.1/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QAEM3X4.1/NOPB transactions.
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4.How is shipping managed for LM4050QAEM3X4.1/NOPB?
LM4050QAEM3X4.1/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QAEM3X4.1/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 LM4050QAEM3X4.1/NOPB?
For technical support, including LM4050QAEM3X4.1/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QAEM3X4.1/NOPB requirements.
6.How does Aetrix verify that LM4050QAEM3X4.1/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QAEM3X4.1/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 LM4050QAEM3X4.1/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QAEM3X4.1/NOPB?
All LM4050QAEM3X4.1/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QAEM3X4.1/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 LM4050QAEM3X4.1/NOPB part is unused and in its original packaging.
Return procedure for LM4050QAEM3X4.1/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050QAEM3X4.1/NOPB Tags
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