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Texas Instruments LM4050AEM3X-2.0/NOPB
- Part No.:
- LM4050AEM3X-2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050AEM3X-2.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,306
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Product details
Overview
LM4050AEM3X-2.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering 2.048 V ±0.1% (A grade) at 25°C with 50 ppm/°C max temperature coefficient, 41 μVrms wideband noise (10 Hz–10 kHz), and stable operation from 60 μA to 15 mA. It enables high-accuracy ADC/DAC biasing in portable instrumentation and battery-powered data acquisition systems.
For engineers reviewing the LM4050AEM3X-2.0/NOPB datasheet, LM4050AEM3X-2.0/NOPB pinout, LM4050AEM3X-2.0/NOPB application, or LM4050AEM3X-2.0/NOPB equivalent, this page provides verified specifications, validated pin functions, confirmed thermal and noise performance, and real-world application context for space-constrained, low-power precision analog designs.
Technical Context
The LM4050AEM3X-2.0/NOPB uses bandgap reference architecture with curvature-corrected temperature drift compensation and Zener-zap wafer-level trimming to achieve ±0.1% initial accuracy. Its shunt topology requires only anode-to-ground connection and cathode-to-input-voltage path, eliminating external capacitors while tolerating any capacitive load.
It operates across −40°C to +125°C with guaranteed 50 ppm/°C max tempco and 120 ppm long-term stability (1000 hrs). Dynamic impedance remains ≤0.3 Ω at 1 mA, ensuring minimal load regulation error (<2.3 mV over 1–15 mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V ±0.1% at 25°C - enables direct 12-bit LSB matching without calibration in 3.3 V-supplied SAR ADCs |
| Tempco | ≤50 ppm/°C - ensures <±1.3 mV drift over −40°C to +125°C, critical for unheated field sensors |
| Min Operating Current | 60 μA - supports ultra-low-power wake-up circuits and energy-harvesting nodes |
| Dynamic Impedance | 0.3 Ω at 1 mA - maintains <0.5 mV output shift under 1 mA load transients |
| Wideband Noise | 41 μVrms (10 Hz–10 kHz) - meets 16-bit effective resolution requirements in precision DAQ front-ends |
| Long-Term Stability | 120 ppm (1000 hrs) - guarantees <±0.25 mV output drift over 6 months in sealed industrial modules |
| Thermal Hysteresis | 0.7 mV (−40°C ↔ +125°C cycle) - prevents repeatability errors in thermal-cycling test equipment |
Pinout & Package
SOT-23 (DBZ) package: 2.92 mm × 1.30 mm footprint, 3-pin surface-mount, JEDEC MO-178AC compliant. Anode (Pin 2) must be connected to ground; Cathode (Pin 1) connects to input voltage and load; Pin 3 is NC (no internal connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current sink / reference output node | Connects to supply rail via series resistor; sets reference voltage by sinking precise current through external Rs |
| Anode (Pin 2) | Common return / ground reference | Mandatory ground connection; defines 0 V reference point for all downstream circuitry |
| NC (Pin 3) | No internal connection | Must remain unconnected; floating or tied to ground per layout best practice-no electrical function |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Guaranteed stability with any capacitive load up to 10 μF - eliminates BOM cost and layout area for decoupling caps |
| Fixed 2.048 V output | Exact match for 12-bit full-scale (212 = 4096) scaling - enables integer-ratio gain setting in programmable gain amplifiers |
| Industrial & extended temp range | Specified from −40°C to +125°C - supports automotive under-hood and industrial motor control applications |
| Low 41 μVrms noise | Meets ENOB ≥15.5 bits in 100 kSPS ADCs - avoids need for external noise filtering in audio-grade signal chains |
| 60 μA min operating current | Enables operation from coin-cell batteries (e.g., CR2032) for >5 years in sleep-mode sensor nodes |
Applications
| Portable Data Loggers | Precision Thermocouple Amplifiers |
|---|---|
Use Scenario: Battery-powered environmental monitors logging temperature/humidity every 10 seconds using 16-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.048 V excitation and ADC reference for ratiometric measurement. Use Value: 60 μA minimum current extends CR2032 battery life beyond 3 years; 0.7 mV thermal hysteresis prevents calibration drift between field deployments. |
Use Scenario: Industrial thermocouple interface module with cold-junction compensation in PLC I/O cards. IC Role / Device Role / Timing Role: Precision voltage reference for ADC and DAC in analog front-end, referenced to isolated ground. Use Value: 50 ppm/°C tempco ensures <±0.5 °C absolute error over −25°C to +70°C ambient; SOT-23 footprint saves PCB space in dense I/O modules. |
| Automotive Cabin Sensors | Calibration-Grade Multimeters |
Use Scenario: Occupant detection system using MEMS pressure sensors and 24-bit delta-sigma ADC in vehicle cabin. IC Role / Device Role / Timing Role: Primary shunt reference for sensor signal conditioning and ADC reference in AEC-Q100-compliant design. Use Value: LM4050AEM3X-2.0/NOPB's 120 ppm long-term stability ensures factory calibration remains valid for 10+ years; −40°C to +125°C rating covers full automotive temperature envelope. |
Use Scenario: Handheld 6½-digit multimeter requiring sub-10 ppm/°C reference stability and <50 μVrms noise floor. IC Role / Device Role / Timing Role: Secondary reference in auto-ranging front-end, used during zero-calibration and gain adjustment cycles. Use Value: 41 μVrms noise directly contributes to <0.001% reading uncertainty; ±0.1% initial tolerance eliminates need for user trim potentiometers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3020AIDBZR | 2.048 V, 50 ppm/°C, but 1.8–5.5 V supply-dependent operation; requires 3.3 V supply rail | Not suitable for true shunt configurations where no local supply exists; needs dedicated LDO | Select when board already has clean 3.3 V rail and lower quiescent current (50 μA) is prioritized over shunt flexibility |
| ADR3420ARJZ-R7 | 2.048 V, 30 ppm/°C (tighter), but 100 μA min current and SOT-23-5 package with enable pin | Requires PCB redesign for 5-pin layout; enable functionality adds complexity in always-on sensor nodes | Select only when superior tempco justifies added layout cost and power-up sequencing overhead |
Compared with REF3020AIDBZR and ADR3420ARJZ-R7, LM4050AEM3X-2.0/NOPB offers true two-terminal shunt operation without supply dependency, lowest minimum current among A-grade 2.048 V references, and proven reliability in automotive-qualified variants-making it optimal for minimalist, battery-critical, or supply-limited designs.
Availability
LM4050AEM3X-2.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, precision data acquisition, and automotive cabin sensing requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LM4050AEM3X-2.0/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 and embedded processing technologies, with decades of leadership in precision reference design and automotive-qualified components.
The LM4050-N product line delivers micropower shunt references optimized for space-constrained, battery-operated, and high-reliability applications-including industrial automation, automotive subsystems, and portable test equipment-where accuracy, stability, and small size are non-negotiable.
FAQ
What is the exact output voltage tolerance of LM4050AEM3X-2.0/NOPB at 25°C?
The LM4050AEM3X-2.0/NOPB has a reverse breakdown voltage of 2.048 V with ±0.1% initial tolerance at 25°C (A grade), meaning the actual output falls within 2.0439–2.0521 V under nominal conditions. This is 100% production tested and guaranteed per TI SNOS455G datasheet Section 6.5.
Does LM4050AEM3X-2.0/NOPB require an external capacitor for stability?
No, LM4050AEM3X-2.0/NOPB does not require an external capacitor. Its internal design ensures unconditional stability with any capacitive load-from 0 to 10 μF-as confirmed in the "No Output Capacitor Required" feature and functional description of the LM4050-N datasheet.
What is the minimum operating current for LM4050AEM3X-2.0/NOPB?
The LM4050AEM3X-2.0/NOPB requires a minimum operating current of 60 μA at 25°C (Section 6.5, IRMIN). At full temperature range (−40°C to +125°C), the guaranteed minimum increases to 65 μA, ensuring reliable regulation across industrial and automotive environments.
Is LM4050AEM3X-2.0/NOPB qualified for automotive applications?
LM4050AEM3X-2.0/NOPB itself is not AEC-Q100 qualified; however, its pin-compatible variant LM4050AQEM3X-2.0/NOPB is Grade 1 qualified (−40°C to +125°C). The LM4050AEM3X-2.0/NOPB shares identical electrical specs and SOT-23 package but is rated for industrial temperature range only.
What is the thermal hysteresis specification for LM4050AEM3X-2.0/NOPB?
The LM4050AEM3X-2.0/NOPB exhibits 0.7 mV thermal hysteresis (VHYST) over a −40°C to +125°C temperature cycle, defined as the voltage difference measured at 25°C after cycling to both extremes. This value is specified in Section 6.5 of the SNOS455G datasheet and ensures repeatable calibration in thermally cycled instruments.
LM4050AEM3X-2.0/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:
- Discontinued at Digi-Key
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 34µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 65 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050AEM3X-2.0/NOPB FAQ
1.How can I place an order for LM4050AEM3X-2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AEM3X-2.0/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 LM4050AEM3X-2.0/NOPB reliable?
The price and inventory of LM4050AEM3X-2.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050AEM3X-2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050AEM3X-2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AEM3X-2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AEM3X-2.0/NOPB?
LM4050AEM3X-2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AEM3X-2.0/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 LM4050AEM3X-2.0/NOPB?
For technical support, including LM4050AEM3X-2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AEM3X-2.0/NOPB requirements.
6.How does Aetrix verify that LM4050AEM3X-2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050AEM3X-2.0/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 LM4050AEM3X-2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050AEM3X-2.0/NOPB?
All LM4050AEM3X-2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AEM3X-2.0/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 LM4050AEM3X-2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4050AEM3X-2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050AEM3X-2.0/NOPB Tags
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