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Texas Instruments LM4050AEM3X-5.0/NOPB
- Part No.:
- LM4050AEM3X-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050AEM3X-5.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,790
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Product details
Overview
LM4050AEM3X-5.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 5.0 V reverse breakdown voltage with ±0.1% initial tolerance (A grade), 50 ppm/°C max temperature coefficient, and 41 μVrms wideband noise (10 Hz–10 kHz). It operates from 60 μA to 15 mA, supports capacitive loads without external compensation, and targets high-accuracy analog signal conditioning in portable instrumentation.
For engineers reviewing the LM4050AEM3X-5.0/NOPB datasheet, LM4050AEM3X-5.0/NOPB pinout, LM4050AEM3X-5.0/NOPB application, or LM4050AEM3X-5.0/NOPB equivalent, key selection criteria include initial voltage accuracy, low dynamic impedance (0.5 Ω), thermal hysteresis (1.4 mV), long-term stability (120 ppm), and compatibility with space-constrained, battery-powered systems requiring stable 5 V reference rails.
Technical Context
The LM4050AEM3X-5.0/NOPB uses bandgap-based Zener-zap trimmed shunt topology with curvature-corrected temperature drift compensation, enabling stable 5.0 V regulation across −40°C to 125°C. Its fuse-trimmed wafer-sort process ensures ±0.1% output tolerance at 25°C for A-grade units.
It functions as a two-terminal device: cathode accepts input current and sets reference voltage via reverse breakdown; anode connects to system ground. No output capacitor is required, and it remains stable with any capacitive load-eliminating external stabilization components and simplifying layout in compact designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal reverse breakdown voltage, fixed and non-adjustable-provides precise 5 V reference for ADCs, DACs, and comparators. |
| Initial Tolerance | ±0.1% at 25°C (A grade)-enables high-accuracy calibration without post-manufacture trimming. |
| Temp Coefficient | 50 ppm/°C maximum over −40°C to 125°C-limits voltage drift to ±0.25 mV/°C across full industrial+ range. |
| Operating Current | 60 μA minimum to 15 mA maximum-supports ultra-low-power sensor nodes and higher-current reference buffering. |
| Dynamic Impedance | 0.5 Ω at 1 mA, 120 Hz-ensures minimal load-induced voltage shift (<0.5 mV per 1 mA load change). |
| Wideband Noise | 41 μVrms (10 Hz–10 kHz)-low enough for 16-bit+ data acquisition without added filtering. |
| Long-Term Stability | 120 ppm after 1000 hours-predictable aging behavior for mission-critical measurement systems. |
Pinout & Package
SOT-23 (DBZ) package: 3-pin surface-mount, body size 2.92 mm × 1.30 mm, JEDEC standard footprint. Pin 1 = Cathode (input/reference node), Pin 2 = Anode (ground), Pin 3 = NC (no internal connection, must be left floating or tied to Pin 2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input and reference voltage node | Reverse-biased terminal where regulated 5.0 V appears; current sourced from external supply flows here to maintain regulation. |
| Anode (Pin 2) | Common ground reference | Must be connected to system ground; defines the 0 V reference for the 5.0 V output at cathode. |
| NC (Pin 3) | No internal connection | Electrically isolated-leaving unconnected avoids parasitic coupling; tying to Pin 2 has no functional impact. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Internal compensation enables unconditional stability with any capacitive load-reduces BOM count and PCB area in space-critical layouts. |
| Tolerates capacitive loads | Stable operation up to ≥10 μF output capacitance-supports direct connection to ADC reference inputs and LDO bypass caps without oscillation risk. |
| Fixed 5.0 V breakdown | Precisely trimmed 5.0 V output eliminates need for external resistive dividers-simplifies design and improves accuracy vs. adjustable references. |
| Low quiescent current | 60 μA minimum operating current enables use in always-on, battery-backed monitoring circuits with multi-year runtime. |
| Industrial + extended temp range | Specified from −40°C to +125°C-suitable for under-hood automotive, industrial PLCs, and outdoor energy metering applications. |
Applications
| Portable Data Loggers | High-Resolution ADC Reference |
|---|---|
Use Scenario: Battery-powered environmental sensor node sampling temperature, humidity, and pressure at 1 kSPS with 16-bit SAR ADC. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 5.0 V reference rail for ADC VREF input and analog front-end biasing. Use Value: ±0.1% initial tolerance and 41 μVrms noise ensure <0.0025% reference error and >92 dB SNR-meeting ENOB ≥15.2 bits. |
Use Scenario: Precision weigh scale using 24-bit delta-sigma ADC with programmable gain amplifier. IC Role / Device Role / Timing Role: Primary reference source for ADC's internal reference buffer and external PGA gain-setting resistors. Use Value: 50 ppm/°C tempco and 1.4 mV thermal hysteresis limit reference drift to <±1 LSB over full temperature cycle-enabling factory calibration validity for 2+ years. |
| Automotive Cabin Sensors | Calibration Equipment |
Use Scenario: Occupant detection module in vehicle seat using capacitive sensing IC with analog signal chain. IC Role / Device Role / Timing Role: Stable 5.0 V reference for sensor excitation and signal conditioning amplifiers in AEC-Q100-compliant design. Use Value: Qualified to −40°C to +125°C and rated for 120 ppm long-term drift-meets ASIL-B functional safety requirements for reference integrity. |
Use Scenario: Handheld multimeter calibrator generating traceable DC voltage outputs from 100 mV to 10 V. IC Role / Device Role / Timing Role: Core reference element in 5 V reference subcircuit feeding precision DAC and op-amp output stage. Use Value: ±0.1% tolerance and <0.5 Ω dynamic impedance enable <10 ppm line regulation error-supporting Class I metrology-grade accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACDBVR | Adjustable 2.495 V reference (requires external resistor divider); 0.2% initial tolerance; 500 mV dropout headroom needed. | Requires board-level tuning for 5 V; less suitable for ultra-low-power or space-constrained designs due to external components. | Choose when flexibility across multiple voltages is needed and layout area permits resistor network. |
| REF5050AIDBVR | Series reference (3-terminal); 5.0 V fixed; 0.05% initial tolerance; 3.3 V min input; 9 μVrms noise. | Higher accuracy and lower noise but requires ≥3.3 V headroom and cannot sink current-unsuitable for shunt-based topologies. | Choose for ultra-low-noise, high-precision systems where supply margin allows series architecture. |
Compared with TL431ACDBVR and REF5050AIDBVR, the LM4050AEM3X-5.0/NOPB delivers true 2-terminal simplicity, zero external components, and optimal trade-off between accuracy (±0.1%), noise (41 μVrms), and micropower operation (60 μA)-making it ideal for embedded reference rails where board space and component count are critical.
Availability
LM4050AEM3X-5.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, precision data acquisition, and automotive cabin sensors requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4050AEM3X-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 and embedded processing technologies, with decades of expertise in precision reference design and high-reliability manufacturing.
The LM4050-N product line delivers micropower shunt voltage references optimized for space-constrained, battery-operated, and high-accuracy measurement systems-emphasizing low drift, low noise, and robust thermal performance.
FAQ
What is the minimum operating current for LM4050AEM3X-5.0/NOPB?
The LM4050AEM3X-5.0/NOPB requires a minimum operating current of 60 μA at 25°C to maintain regulation within specification. At full temperature range (−40°C to 125°C), this increases to 80 μA for industrial grade and 90 μA for extended temperature operation-ensuring stable 5.0 V output even in ultra-low-power sleep modes.
Does LM4050AEM3X-5.0/NOPB require an external capacitor for stability?
No, the LM4050AEM3X-5.0/NOPB does not require an external capacitor for stability. Its internal design tolerates any capacitive load-including direct connection to ADC reference pins or large bulk capacitors-without oscillation or phase-margin degradation, eliminating a common design constraint of older shunt references.
What is the thermal hysteresis specification for LM4050AEM3X-5.0/NOPB?
The LM4050AEM3X-5.0/NOPB exhibits 1.4 mV thermal hysteresis over a −40°C to +125°C temperature cycle, measured as the voltage difference at 25°C before and after extreme-temperature exposure. This low hysteresis supports repeatable calibration in field-deployed test equipment and automotive modules subject to thermal cycling.
Can LM4050AEM3X-5.0/NOPB be used in automotive applications?
Yes-the LM4050AEM3X-5.0/NOPB is qualified to −40°C to +125°C and meets industrial reliability standards. While not AEC-Q100 certified itself, its parametric performance and temperature range align with non-safety-critical automotive cabin sensors, infotainment power monitoring, and body control modules where reference stability is essential.
How does the dynamic impedance of LM4050AEM3X-5.0/NOPB affect load regulation?
The LM4050AEM3X-5.0/NOPB has a typical dynamic impedance of 0.5 Ω at 1 mA, meaning a 1 mA change in shunt current causes only ~0.5 mV output shift. This enables excellent load regulation-critical when driving variable-current analog circuitry-without requiring additional buffering stages in most precision applications.
LM4050AEM3X-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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050AEM3X-5.0/NOPB FAQ
1.How can I place an order for LM4050AEM3X-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AEM3X-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 LM4050AEM3X-5.0/NOPB reliable?
The price and inventory of LM4050AEM3X-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 LM4050AEM3X-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050AEM3X-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AEM3X-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AEM3X-5.0/NOPB?
LM4050AEM3X-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AEM3X-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 LM4050AEM3X-5.0/NOPB?
For technical support, including LM4050AEM3X-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AEM3X-5.0/NOPB requirements.
6.How does Aetrix verify that LM4050AEM3X-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050AEM3X-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 LM4050AEM3X-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050AEM3X-5.0/NOPB?
All LM4050AEM3X-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AEM3X-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 LM4050AEM3X-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM4050AEM3X-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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