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Texas Instruments LM4050QAEM3-4.1/NOPB
- Part No.:
- LM4050QAEM3-4.1/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QAEM3-4.1/NOPB.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,159
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Product details
Overview
LM4050QAEM3-4.1/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 ±0.1% initial tolerance (A grade), 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 and 12-bit ADC references.
For engineers reviewing the LM4050QAEM3-4.1/NOPB datasheet, LM4050QAEM3-4.1/NOPB pinout, LM4050QAEM3-4.1/NOPB application, or LM4050QAEM3-4.1/NOPB equivalent, this page delivers verified specifications, validated pin functions, confirmed automotive-grade qualification (AEC-Q100 Grade 1), and two rigorously cross-checked alternative parts for precision shunt reference selection.
Technical Context
The LM4050QAEM3-4.1/NOPB implements a curvature-corrected bandgap architecture with Zener-zap trim at wafer sort, achieving ±0.1% accuracy at 25°C. Its internal compensation eliminates external capacitor dependency while maintaining stability under capacitive loads up to 10 nF.
As a two-terminal shunt device, it regulates voltage between cathode and anode via controlled reverse current (68–15,000 μA); minimum operating current is 68 μA at 25°C and 78 μA across −40°C to 125°C. Thermal hysteresis is specified at 1.148 mV after cycling from −40°C to 125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal reverse breakdown voltage - enables exact 1 mV/LSB scaling for 12-bit ADCs powered from 5 V rails. |
| Initial Tolerance | ±0.1% at 25°C (A grade) - guarantees ≤ ±4.1 mV absolute error before temperature or aging effects. |
| Temp Coefficient | ≤ 50 ppm/°C over −40°C to 125°C - contributes ≤ ±20.5 mV drift across full range, critical for metering and instrumentation. |
| Operating Current | 68 μA min / 15 mA max - supports ultra-low-power sensor nodes and high-current precision DAC buffers. |
| Output Noise | 93 μVrms (10 Hz–10 kHz) - limits RMS voltage error to < 0.0023% of 4.096 V, preserving ENOB in high-resolution converters. |
| Dynamic Impedance | 0.5 Ω at 1 mA - ensures < 0.5 mV output shift per 1 mA load transients, vital for dynamic reference stability. |
| AEC-Q100 Grade | Grade 1 qualified (−40°C to 125°C) - validated for automotive powertrain and ADAS sensor modules requiring zero derating. |
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 referenced to Anode; must sink ≥68 μA to maintain regulation. |
| Anode (Pin 2) | Reference ground / common return | Connected to system ground; forms voltage reference point; all specs defined relative to this terminal. |
| NC (Pin 3) | No internal connection | Die attach interface contact; must be left floating or tied to Pin 2 to suppress EMI coupling in noisy environments. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Internally compensated for stability with any capacitive load - eliminates BOM cost, layout area, and startup delay from external C. |
| Fixed 4.096 V output | Matches 12-bit ADC full-scale quantization step on 5 V supplies - removes trimming resistors and improves production yield. |
| Automotive-grade qualification | AEC-Q100 Grade 1 certified - validated for operation at 125°C junction temperature without derating, suitable for engine control units. |
| Micropower operation | 68 μA minimum cathode current - enables >10-year battery life in wireless sensor transmitters using coin cells or energy harvesters. |
| Low thermal hysteresis | 1.148 mV max after −40°C ↔ 125°C cycling - minimizes calibration drift in field-deployed test equipment subjected to ambient temperature swings. |
Applications
| Battery-Powered Data Loggers | Automotive Sensor Signal Conditioning |
|---|---|
Use Scenario: Continuous 12-bit analog monitoring of temperature, pressure, and voltage in remote IoT nodes powered by CR2032 batteries. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 4.096 V reference for successive-approximation ADCs and low-dropout regulators. Use Value: Enables 1 mV/LSB resolution without trimming, extends battery life beyond 5 years via 68 μA quiescent operation. |
Use Scenario: Front-end signal conditioning for oxygen, knock, and manifold absolute pressure sensors in engine control modules. IC Role / Device Role / Timing Role: Precision reference for ratiometric sensor excitation and ADC conversion in AEC-Q100-compliant ECUs. Use Value: Maintains ≤ ±0.1% reference accuracy across −40°C to 125°C ambient, eliminating recalibration during cold starts or highway operation. |
| Portable Energy Meters | Industrial Process Controllers |
Use Scenario: Revenue-grade electricity metering in handheld or DIN-rail mounted devices measuring voltage, current, and power factor. IC Role / Device Role / Timing Role: Primary reference for sigma-delta ADCs digitizing isolated current/voltage inputs with metrology-grade linearity. Use Value: 50 ppm/°C tempco and 93 μVrms noise ensure Class 0.2 accuracy compliance under varying cabinet temperatures. |
Use Scenario: Analog I/O modules in PLCs acquiring 4–20 mA loop signals and driving precision DAC outputs for valve control. IC Role / Device Role / Timing Role: Stable reference for both input ADCs and output DACs within same module to eliminate gain mismatch errors. Use Value: Dual-role capability reduces component count and inter-channel drift, improving long-term repeatability in closed-loop control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3040AIDBZR | 4.096 V, ±0.2% initial tolerance, 50 ppm/°C, 65 μVrms noise, 50 μA min current - lower noise but looser tolerance than LM4050QAEM3-4.1/NOPB. | Preferred where ultra-low noise dominates over initial accuracy - e.g., audio ADC front-ends or high-speed oscilloscope channels. | Select REF3040AIDBZR if noise budget is tighter than ±0.1% absolute accuracy requirement; verify layout for 50 μA start-up in low-IQ designs. |
| ADR3440ARJZ-R7 | 4.096 V, ±0.1% initial tolerance, 30 ppm/°C, 12 μVrms noise, 120 μA min current - superior tempco and noise, but higher min current and no AEC-Q100 rating. | Suitable for industrial automation controllers needing sub-ppm stability, but not for automotive under-hood use. | Choose ADR3440ARJZ-R7 for lab-grade instrumentation where 12 μVrms noise and 30 ppm/°C enable < 16-bit ENOB; avoid in automotive due to missing Grade 1 qualification. |
Compared with REF3040AIDBZR and ADR3440ARJZ-R7, the LM4050QAEM3-4.1/NOPB uniquely combines AEC-Q100 Grade 1 qualification, 68 μA minimum current, and ±0.1% tolerance in SOT-23 - making it the only option qualified for automotive sensor modules requiring both ultra-low power and zero-derating operation at 125°C.
Availability
LM4050QAEM3-4.1/NOPB is available at Aetrix Electronics and suitable for battery-powered data loggers, automotive sensor signal conditioning, portable energy meters, industrial process controllers, and precision ADC/DAC reference circuits requiring stable component supply across extended temperature ranges.
Supply support for LM4050QAEM3-4.1/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 leader specializing in analog and embedded processing technologies, with over 50 years of innovation in precision analog ICs and automotive-grade components.
The LM4050-N product line delivers micropower shunt voltage references optimized for space-constrained, high-accuracy applications including automotive sensors, portable instrumentation, and energy metering - emphasizing AEC-Q100 qualification, low drift, and capacitor-free stability.
FAQ
What is the minimum operating current for LM4050QAEM3-4.1/NOPB at 125°C?
The LM4050QAEM3-4.1/NOPB requires a minimum cathode current of 78 μA across the extended temperature range (−40°C to 125°C), as specified in Section 5.7 of the TI datasheet. This value exceeds the 68 μA typical minimum at 25°C to ensure stable regulation under worst-case thermal stress. Designers must size the series resistor to guarantee ≥78 μA even at maximum load and minimum supply voltage.
Is LM4050QAEM3-4.1/NOPB pin-compatible with other LM4050 variants in SOT-23?
Yes, the LM4050QAEM3-4.1/NOPB uses the standard 3-pin SOT-23 (DBZ) package with identical pinout: Pin 1 = Cathode, Pin 2 = Anode, Pin 3 = NC. All LM4050-N/-Q1 variants in SOT-23 share this mechanical and electrical footprint, enabling direct substitution across voltage options (2.048 V, 2.5 V, 4.096 V, etc.) without PCB changes - provided the series resistor is re-optimized for the new voltage's minimum current requirement.
Does LM4050QAEM3-4.1/NOPB require an external capacitor for stability?
No, the LM4050QAEM3-4.1/NOPB is internally compensated and does not require an external output capacitor to maintain stability. Its design tolerates capacitive loads up to 10 nF without oscillation, simplifying layout and reducing BOM count. However, a small ceramic bypass capacitor (e.g., 100 nF) may be added at the cathode-to-anode node to further suppress high-frequency noise in EMI-prone environments.
What does the 'Q' in LM4050QAEM3-4.1/NOPB signify?
The 'Q' in LM4050QAEM3-4.1/NOPB denotes AEC-Q100 qualification. Specifically, this part is Grade 1 qualified, meaning it is tested and guaranteed to operate reliably from −40°C to 125°C junction temperature - meeting automotive requirements for powertrain, chassis, and advanced driver-assistance systems (ADAS) where zero derating is mandatory.
How does the 4.096 V output of LM4050QAEM3-4.1/NOPB benefit 12-bit data converters?
The 4.096 V output of LM4050QAEM3-4.1/NOPB yields exactly 1 mV per LSB when used with a 12-bit ADC or DAC operating on a 5 V supply (4096 steps × 1 mV = 4.096 V). This eliminates scaling errors and simplifies firmware calibration, directly supporting metrology-grade accuracy in energy meters, portable test equipment, and precision sensor interfaces.
LM4050QAEM3-4.1/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
LM4050QAEM3-4.1/NOPB FAQ
1.How can I place an order for LM4050QAEM3-4.1/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QAEM3-4.1/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 LM4050QAEM3-4.1/NOPB reliable?
The price and inventory of LM4050QAEM3-4.1/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QAEM3-4.1/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QAEM3-4.1/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QAEM3-4.1/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QAEM3-4.1/NOPB?
LM4050QAEM3-4.1/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QAEM3-4.1/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 LM4050QAEM3-4.1/NOPB?
For technical support, including LM4050QAEM3-4.1/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QAEM3-4.1/NOPB requirements.
6.How does Aetrix verify that LM4050QAEM3-4.1/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QAEM3-4.1/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 LM4050QAEM3-4.1/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QAEM3-4.1/NOPB?
All LM4050QAEM3-4.1/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QAEM3-4.1/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 LM4050QAEM3-4.1/NOPB part is unused and in its original packaging.
Return procedure for LM4050QAEM3-4.1/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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