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Texas Instruments LM4050BEM3X-2.0/NOPB
- Part No.:
- LM4050BEM3X-2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050BEM3X-2.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,518
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Product details
Overview
LM4050BEM3X-2.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 2.048 V reverse breakdown voltage with ±0.2% initial tolerance (B-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 space-constrained systems.
For engineers reviewing the LM4050BEM3X-2.0/NOPB datasheet, LM4050BEM3X-2.0/NOPB pinout, LM4050BEM3X-2.0/NOPB application, or LM4050BEM3X-2.0/NOPB equivalent, key selection criteria include its 2.048 V nominal output, SOT-23-3 package compatibility, industrial temperature range (−40°C to +85°C), low dynamic impedance (0.3 Ω at 1 mA), and absence of required output capacitor-critical for portable instrumentation and battery-powered data acquisition.
Technical Context
The LM4050BEM3X-2.0/NOPB uses bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation. Its fixed 2.048 V output is optimized for 12-bit DAC/ADC reference scaling and matches binary-weighted voltage standards.
It functions as a two-terminal device requiring only an external current-setting resistor; stability is maintained across 0–15 mA load current and any capacitive load up to 10 μF, eliminating need for output phase compensation networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal; enables exact 1 LSB scaling for 12-bit systems (e.g., 4096 steps over 0–8.192 V full scale) |
| Initial Tolerance | ±0.2% at 25°C (B-grade); guarantees ≤±4.1 mV absolute error before temperature or aging effects |
| Temp Coefficient | ≤50 ppm/°C max over −40°C to +85°C; contributes ≤±3.3 mV drift across full industrial range |
| Operating Current | 60 μA min to 15 mA max; supports ultra-low-power sensor biasing and high-current reference buffering |
| Noise (10 Hz–10 kHz) | 41 μVrms typical; limits added uncertainty to <0.002% of output, critical for precision measurement front-ends |
| Dynamic Impedance | 0.3 Ω at 1 mA; ensures <0.3 mV output shift per 1 mA load change, enabling stable regulation under varying sink conditions |
| Long-Term Stability | 120 ppm after 1000 hrs; corresponds to ≤0.25 mV drift over 1 year, suitable for calibration-critical equipment |
Pinout & Package
SOT-23 (DBZ) package: 2.92 mm × 1.30 mm body, 3-pin surface-mount, JEDEC MO-178AC compliant. Thermal resistance RθJA = 287°C/W (board mounted).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage reference node | Connects to regulated voltage rail; sinks all current not drawn by load; sets reference potential |
| Anode (Pin 2) | Common return / ground reference | Must be connected to system ground; defines 0 V reference for cathode voltage |
| NC (Pin 3) | No internal connection | Left floating per datasheet; no PCB trace or thermal pad required; avoids unintended coupling |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct integration into compact layouts without stability-compensation components or layout-dependent tuning |
| Tolerates capacitive loads | Stable with 0–10 μF output capacitance-supports filtering, decoupling, and EMI suppression without oscillation risk |
| Fixed 2.048 V output | Matches standard 12-bit full-scale scaling (212 × 0.5 mV), eliminating need for external resistor dividers in DAC/ADC references |
| Low quiescent current | 60 μA minimum operating current enables use in always-on battery monitoring and energy-harvesting nodes |
| Industrial temp range | Specified performance from −40°C to +85°C ensures reliability in factory automation, outdoor sensors, and automotive cabin modules |
Applications
| Portable Data Loggers | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Battery-powered environmental sensor node measuring temperature, humidity, and pressure with 12-bit ADC. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.048 V reference for ADC conversion and sensor excitation. Use Value: Enables 0.025% full-scale accuracy over temperature without trimming; 60 μA min current extends 10-year coin-cell life. | Use Scenario: 4–20 mA transmitter with HART interface in process control loop. IC Role / Device Role / Timing Role: Precision voltage reference for DAC generating analog output and internal calibration circuitry. Use Value: 50 ppm/°C TC and 120 ppm long-term drift ensure <0.1% span error over 15 years in unattended field deployment. |
| Medical Patient Monitoring Front-End | Automotive Cabin Climate Control |
Use Scenario: Low-noise ECG amplifier with 24-bit sigma-delta ADC sampling at 1 kSPS. IC Role / Device Role / Timing Role: Low-noise (41 μVrms) reference for ADC and analog front-end gain stages. Use Value: Noise floor remains below 1 LSB of 24-bit conversion (0.12 μV), preserving diagnostic signal fidelity. | Use Scenario: HVAC controller measuring cabin temperature via thermistor bridge and NTC network. IC Role / Device Role / Timing Role: Stable 2.048 V reference for ratiometric bridge excitation and ADC reference in microcontroller. Use Value: Eliminates ratio-metric error from supply variation; ±0.2% initial tolerance ensures <0.5°C absolute temperature 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 |
|---|---|---|---|
| LM4040BIM3-2.5/NOPB | 2.5 V output, ±0.2% tolerance, 50 ppm/°C TC, but requires ≥1 nF output capacitor for stability | Not drop-in for 2.048 V–scaled 12-bit systems; needs resistor divider or redesign for same ADC full-scale | Select only if 2.5 V reference is acceptable and board layout allows capacitor placement |
| REF3020AIDBZR | 2.048 V output, ±0.2% tolerance, 50 ppm/°C TC, but is series (not shunt) topology with 50 μA quiescent current and 3.6 V min input | Requires dedicated supply rail; cannot replace shunt configuration without circuit rework (e.g., current source removal) | Choose only when supply headroom >3.6 V exists and shunt topology constraints prevent LM4050 use |
Compared with LM4040BIM3-2.5/NOPB and REF3020AIDBZR, the LM4050BEM3X-2.0/NOPB uniquely combines exact 2.048 V output, shunt topology, capacitor-free stability, and SOT-23 footprint-making it the only option for space-limited, low-headroom, 12-bit-ratiometric designs without layout or schematic revision.
Availability
LM4050BEM3X-2.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, medical diagnostics equipment, and automotive cabin electronics requiring stable component supply across extended production lifecycles.
Supply support for LM4050BEM3X-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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs since 1951.
The LM4050-N product line delivers micropower shunt references optimized for space-constrained, battery-operated, and high-accuracy measurement systems-designed specifically for portable instrumentation, industrial process control, and automotive subsystems where size, stability, and low power are critical.
FAQ
What is the minimum operating current for LM4050BEM3X-2.0/NOPB?
The LM4050BEM3X-2.0/NOPB requires a minimum operating current of 60 μA at 25°C, rising to 65 μA across the full industrial temperature range (−40°C to +85°C). This value is verified per Section 6.5 of the SNOS455G datasheet and reflects the lowest current at which the device maintains specified 2.048 V output accuracy and stability. Operating below this threshold risks loss of regulation and increased output impedance.
Does LM4050BEM3X-2.0/NOPB require an external output capacitor?
No, the LM4050BEM3X-2.0/NOPB does not require an external output capacitor for stability. Its internal design eliminates the need for compensation, and it remains stable with any capacitive load from 0 to 10 μF-as confirmed in the "Features" and "Description" sections of the SNOS455G datasheet. This simplifies layout and reduces BOM count compared to alternatives like the LM4040 series.
What is the temperature coefficient specification for LM4050BEM3X-2.0/NOPB?
The LM4050BEM3X-2.0/NOPB has a maximum temperature coefficient of 50 ppm/°C over the industrial temperature range (−40°C to +85°C), as stated in the Key Specifications table and verified in Section 6.5 of the SNOS455G datasheet. This translates to a worst-case output drift of ±3.3 mV across the full range, ensuring predictable performance in unregulated thermal environments.
Is LM4050BEM3X-2.0/NOPB qualified for automotive applications?
No, LM4050BEM3X-2.0/NOPB is not AEC-Q100 qualified. It belongs to the industrial-grade LM4050-N family. For automotive use, TI offers the LM4050-N-Q1 variant (e.g., LM4050BEM3X-2.0Q1), which is AEC-Q100 Grade 1 qualified and specified for −40°C to +125°C operation. The /NOPB suffix confirms commercial-industrial qualification only.
How is the 2.048 V output of LM4050BEM3X-2.0/NOPB used in data acquisition systems?
The 2.048 V output of LM4050BEM3X-2.0/NOPB serves as a precise reference for 12-bit ADCs and DACs, enabling exact full-scale mapping (212 = 4096 steps × 0.5 mV = 2.048 V). In data acquisition systems, this eliminates scaling errors and removes need for post-conversion software correction-directly supporting high-fidelity sensor digitization in portable loggers and industrial controllers where LM4050BEM3X-2.0/NOPB is deployed.
LM4050BEM3X-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:
- ±0.2%
- 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
LM4050BEM3X-2.0/NOPB FAQ
1.How can I place an order for LM4050BEM3X-2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050BEM3X-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 LM4050BEM3X-2.0/NOPB reliable?
The price and inventory of LM4050BEM3X-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 LM4050BEM3X-2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050BEM3X-2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050BEM3X-2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050BEM3X-2.0/NOPB?
LM4050BEM3X-2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050BEM3X-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 LM4050BEM3X-2.0/NOPB?
For technical support, including LM4050BEM3X-2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050BEM3X-2.0/NOPB requirements.
6.How does Aetrix verify that LM4050BEM3X-2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050BEM3X-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 LM4050BEM3X-2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050BEM3X-2.0/NOPB?
All LM4050BEM3X-2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050BEM3X-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 LM4050BEM3X-2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4050BEM3X-2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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