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Texas Instruments LM4050AEM3-4.1/NOPB
- Part No.:
- LM4050AEM3-4.1/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050AEM3-4.1/NOPB.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,780
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Product details
Overview
LM4050AEM3-4.1/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 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 73 μA to 15 mA, supports capacitive loads without external compensation, and targets high-accuracy analog signal chains in space-constrained systems.
For engineers reviewing the LM4050AEM3-4.1/NOPB datasheet, LM4050AEM3-4.1/NOPB pinout, LM4050AEM3-4.1/NOPB application, or LM4050AEM3-4.1/NOPB equivalent, key selection criteria include its 4.096 V nominal output, A-grade accuracy, industrial/extended temperature range support (−40°C to +125°C), no-output-capacitor operation, and SOT-23 footprint compatibility with board-level voltage reference calibration and low-power data acquisition designs.
Technical Context
The LM4050AEM3-4.1/NOPB uses bandgap-based Zener-zap trimmed shunt topology with curvature-corrected temperature drift compensation, enabling stable 4.096 V reference performance across −40°C to +125°C. Its dynamic impedance remains ≤0.5 Ω at 1 mA, ensuring minimal load regulation error (≤2 mV over 1–15 mA).
It requires no external capacitor for stability and tolerates unlimited capacitive loading-unlike series references-making it ideal for point-of-load biasing of ADCs, DACs, and sensor front-ends where layout simplicity and low quiescent current are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal; exact value required for 12-bit+ ADC/DAC full-scale calibration and ratiometric sensor excitation. |
| Initial Tolerance | ±0.1% at 25°C (A grade); enables single-point calibration in production test without trimming. |
| Temp Coefficient | ≤50 ppm/°C max over −40°C to +125°C; contributes ≤±0.53 mV drift across full range, critical for precision instrumentation. |
| Min Operating Current | 73 μA (industrial range); allows operation from ultra-low-power sources like coin cells or energy harvesters. |
| Wideband Noise | 93 μVrms (10 Hz–10 kHz); limits effective resolution in 16-bit+ data acquisition systems. |
| Dynamic Impedance | 0.5 Ω max at 1 mA; ensures <±1 mV output shift under 1 mA load transients, supporting fast-switching analog circuits. |
| Long-Term Stability | 120 ppm over 1000 hrs; guarantees reference drift <±0.5 mV in mission-critical 5-year deployments. |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, surface-mount, 3-pin configuration with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / reference output node | Connected to regulated voltage rail; sinks all load + reference current; sets output voltage via external resistor divider. |
| Anode (Pin 2) | Common return / ground reference | Must be tied to system ground; forms the 0 V reference for cathode voltage; no internal connection to substrate. |
| NC (Pin 3) | No internal connection | Left floating per datasheet; no PCB trace or thermal pad connection required; avoids unintended parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Eliminates BOM cost and board area for stabilization cap; simplifies layout in dense PCBs and portable devices. |
| Tolerates capacitive loads | Stable with any value of output capacitance (including >100 nF ceramic), enabling direct buffering of ADC reference inputs. |
| Fixed 4.096 V output | Matches common 12-bit full-scale binary (212 = 4096), eliminating scaling resistors in microcontroller ADC applications. |
| Low 73 μA min operating current | Supports battery life extension in always-on sensors and IoT edge nodes with sub-100 μA sleep modes. |
| Industrial & extended temp range | Rated for −40°C to +125°C junction temperature; qualified for automotive under-hood and industrial motor control environments. |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
|
Use Scenario: Battery-powered environmental monitoring node sampling temperature/humidity at 1 Hz with 16-bit SAR ADC. IC Role / Device Role / Timing Role: Shunt reference providing stable 4.096 V VREF to ADC, directly scaled to sensor output range. Use Value: Enables ±0.005% full-scale accuracy without calibration; 73 μA minimum current extends 10-year coin-cell life. |
Use Scenario: 4–20 mA loop-powered pressure transmitter with HART digital overlay in oil & gas field equipment. IC Role / Device Role / Timing Role: Precision voltage reference for DAC generating analog output current setpoint. Use Value: 50 ppm/°C TC ensures <±0.1% span error over −40°C to +85°C ambient, meeting SIL-2 functional safety requirements. |
| Medical Patient Monitors | Automotive Battery Management Systems |
|
Use Scenario: Portable ECG front-end digitizing biopotential signals with 24-bit delta-sigma ADC. IC Role / Device Role / Timing Role: Low-noise (93 μVrms) reference for ADC reference input and op-amp bias networks. Use Value: Limits quantization noise floor to <1 LSB at 24-bit resolution; no capacitor needed avoids EMI coupling into sensitive analog paths. |
Use Scenario: Cell voltage monitoring IC in 12S Li-ion BMS requiring accurate 4.096 V reference for 12-bit ADC per cell. IC Role / Device Role / Timing Role: Primary voltage reference for multi-channel ADC measuring stacked battery voltages. Use Value: A-grade ±0.1% tolerance eliminates per-unit calibration; SOT-23 footprint fits tight spacing between adjacent cell sense points. |
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 | Series reference; 4.096 V output; 50 ppm/°C TC; requires 1-μF output cap; 50-μA quiescent current. | Needs external capacitor and higher supply headroom; better PSRR but less flexible layout. | Choose when supply rejection >80 dB is critical and board space allows capacitor placement. |
| ADR3440ARJZ-R7 | Series reference; 4.096 V; 10 ppm/°C TC; 6-μA IQ; requires 1-μF cap; 120 μVrms noise. | Ultra-low power but higher noise and tighter layout constraints; not drop-in compatible. | Prefer for energy-harvesting systems where IQ <10 μA dominates design, accepting higher noise and capacitor dependency. |
Compared with REF3040AIDBZR and ADR3440ARJZ-R7, the LM4050AEM3-4.1/NOPB offers capacitor-free operation and superior layout flexibility at the cost of slightly higher noise and lower PSRR-making it optimal for compact, low-component-count analog subsystems where stability under variable load capacitance is essential.
Availability
LM4050AEM3-4.1/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, medical patient monitors, and automotive battery management systems requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4050AEM3-4.1/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 decades of leadership in precision reference design and high-reliability manufacturing.
The LM4050-N product line delivers micropower shunt references optimized for space-constrained, battery-operated, and high-accuracy measurement systems-emphasizing zero-capacitor stability, wide current range, and automotive-grade variants.
FAQ
What is the exact output voltage and tolerance of LM4050AEM3-4.1/NOPB?
The LM4050AEM3-4.1/NOPB provides a nominal reverse breakdown voltage of 4.096 V with an initial tolerance of ±0.1% at 25°C (A grade). This tolerance is guaranteed across the industrial temperature range (−40°C to +85°C) and extended range (−40°C to +125°C), with total overtemperature error bounded by ±18 mV (industrial) and ±25 mV (extended) per datasheet Section 6.7.
Does LM4050AEM3-4.1/NOPB require an external output capacitor?
No, the LM4050AEM3-4.1/NOPB does not require an external output capacitor for stability. Its internal design ensures unconditional stability with any capacitive load-including large ceramic or tantalum capacitors-eliminating the need for layout-compromising compensation components and reducing BOM count.
What is the minimum operating current for LM4050AEM3-4.1/NOPB?
The LM4050AEM3-4.1/NOPB requires a minimum operating current of 73 μA over the industrial temperature range (−40°C to +85°C) and 78 μA over the extended range (−40°C to +125°C), as specified in Section 6.7 of the SNOS455G datasheet. Operation below this current risks loss of regulation and increased output impedance.
Can LM4050AEM3-4.1/NOPB be used in automotive applications?
Yes-the LM4050AEM3-4.1/NOPB is rated for −40°C to +125°C junction temperature and meets industrial reliability standards. While the LM4050-N-Q1 variant is AEC-Q100 Grade 1 qualified, the LM4050AEM3-4.1/NOPB is widely deployed in non-safety-critical automotive subsystems such as infotainment power rails and cabin sensor interfaces where extended temperature operation is required.
What is the wideband noise performance of LM4050AEM3-4.1/NOPB?
The LM4050AEM3-4.1/NOPB delivers 93 μVrms wideband noise over the 10 Hz to 10 kHz bandwidth at 100 μA operating current, as measured per Section 6.7 of the datasheet. This noise level directly impacts effective resolution in 16-bit data acquisition systems and must be considered when designing low-noise analog front-ends.
LM4050AEM3-4.1/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:
- Obsolete
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050AEM3-4.1/NOPB FAQ
1.How can I place an order for LM4050AEM3-4.1/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AEM3-4.1/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 LM4050AEM3-4.1/NOPB reliable?
The price and inventory of LM4050AEM3-4.1/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050AEM3-4.1/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050AEM3-4.1/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AEM3-4.1/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AEM3-4.1/NOPB?
LM4050AEM3-4.1/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AEM3-4.1/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 LM4050AEM3-4.1/NOPB?
For technical support, including LM4050AEM3-4.1/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AEM3-4.1/NOPB requirements.
6.How does Aetrix verify that LM4050AEM3-4.1/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050AEM3-4.1/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 LM4050AEM3-4.1/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050AEM3-4.1/NOPB?
All LM4050AEM3-4.1/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AEM3-4.1/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 LM4050AEM3-4.1/NOPB part is unused and in its original packaging.
Return procedure for LM4050AEM3-4.1/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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