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Texas Instruments LM4050BEM3-10
- Part No.:
- LM4050BEM3-10
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050BEM3-10.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,887
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Product details
Overview
LM4050BEM3-10 from Texas Instruments is a precision micropower shunt voltage reference with 10 V nominal reverse breakdown voltage, ±0.2% initial tolerance (B-grade), 50 ppm/°C max temperature coefficient, and 100 μA minimum operating current. It operates across −40°C to 125°C and delivers stable reference voltage in space-constrained analog signal chains and data acquisition front-ends.
For engineers reviewing the LM4050BEM3-10 datasheet, LM4050BEM3-10 pinout, LM4050BEM3-10 application, or LM4050BEM3-10 equivalent, key selection considerations include its SOT-23 package compatibility, no-output-capacitor-required operation, capacitive load tolerance, and industrial/automotive-grade thermal stability.
Technical Context
The LM4050BEM3-10 uses bandgap reference architecture with curvature-corrected temperature drift compensation and Zener-zap trim at wafer sort to achieve ±0.2% accuracy at 25°C. Its shunt topology requires an external series resistor to set operating current and regulates by sinking variable current through the cathode terminal.
It exhibits low dynamic impedance (0.7 Ω typical at 1 mA), wide operating current range (100 μA to 15 mA), and stable performance with any capacitive load - eliminating need for output capacitor while maintaining stability under varying load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 10 V nominal reverse breakdown voltage, verified at 150 μA test current |
| Initial Tolerance | ±0.2% at 25°C (B-grade), enabling high-accuracy ADC/DAC biasing without trimming |
| Temp Coefficient | ≤50 ppm/°C over −40°C to 125°C, ensuring <±5 mV drift across full industrial range |
| Min Operating Current | 100 μA (typical), supporting ultra-low-power battery-operated systems |
| Dynamic Impedance | 0.7 Ω typical at 1 mA, minimizing load-induced voltage variation |
| Wideband Noise | 150 μVrms (10 Hz–10 kHz), suitable for precision measurement circuits |
| Long-Term Stability | 120 ppm after 1000 hrs, critical for calibration-critical instrumentation |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, surface-mount compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage regulation node | Connects to supply rail via series resistor; sinks variable current to maintain 10 V across anode–cathode |
| Anode (Pin 2) | Reference ground / common return | Must be connected to system ground; defines 0 V reference point for regulated output |
| NC (Pin 3) | No internal connection | Left floating per datasheet; no PCB trace or solder required |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct integration into compact layouts without stability-compromising bypass components |
| Tolerates capacitive loads | Stable with >100 nF load capacitance, simplifying filtering in sensor interface stages |
| Fixed 10 V breakdown voltage | Eliminates external resistor divider; supports direct use with 10-bit+ SAR ADCs and DACs |
| Industrial & extended temp range | Rated for −40°C to 125°C operation, qualified for automotive and harsh-environment applications |
| Low quiescent current | 100 μA min operating current enables multi-year battery life in portable instrumentation |
Applications
| Portable Instrumentation | Data Acquisition Front-End |
|---|---|
Use Scenario: Handheld multimeter with 16-bit ADC and lithium coin-cell power source. IC Role / Device Role / Timing Role: Shunt reference providing stable 10 V reference for ADC full-scale calibration. Use Value: Enables ±0.2% absolute accuracy without trimming, extending battery life via 100 μA operating current. |
Use Scenario: Isolated industrial DAQ module measuring 4–20 mA sensor loops. IC Role / Device Role / Timing Role: Precision voltage reference for sigma-delta ADC reference input and analog front-end gain-setting. Use Value: 50 ppm/°C tempco ensures <±5 mV error over −40°C to 85°C ambient, meeting Class A metrology requirements. |
| Automotive Sensor Conditioning | Precision Audio Biasing |
Use Scenario: Engine control unit (ECU) monitoring exhaust gas oxygen sensors. IC Role / Device Role / Timing Role: Stable 10 V reference for op-amp-based transimpedance amplifier and ADC reference. Use Value: AEC-Q100 Grade 1 qualification and −40°C to 125°C operation ensure reliability in under-hood environments. |
Use Scenario: High-fidelity audio DAC board requiring ultra-low-noise analog supply rails. IC Role / Device Role / Timing Role: Low-noise 10 V reference for headphone amplifier bias and DAC reference voltage generation. Use Value: 150 μVrms wideband noise minimizes audible distortion in 24-bit audio conversion paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C10IDBZR | ±0.5% initial tolerance (C-grade), 100 μA min current, same SOT-23 package | Lower accuracy grade; suited for cost-sensitive non-critical references | Select when ±0.5% tolerance meets system requirements and BOM cost reduction is prioritized |
| REF5010AIDR | Series topology, 10 V output, ±0.05% initial tolerance, SOIC-8 package, higher quiescent current | Requires external bypass capacitor; not drop-in compatible due to topology and pinout | Choose for ultra-high-precision applications where series reference layout and higher IQ are acceptable |
Compared with TL4050C10IDBZR, LM4050BEM3-10 offers tighter ±0.2% tolerance and lower long-term drift; compared with REF5010AIDR, it provides shunt topology simplicity and SOT-23 footprint but trades off absolute accuracy and noise performance.
Availability
LM4050BEM3-10 is available at Aetrix Electronics and suitable for portable instrumentation, industrial data acquisition, and automotive sensor conditioning requiring stable component supply with guaranteed long-term availability.
Supply support for LM4050BEM3-10 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, embedded processing, and connectivity technologies, with decades of expertise in precision analog IC design.
The LM4050-N product line delivers micropower shunt voltage references optimized for space-constrained, battery-powered, and high-reliability applications demanding low drift, low noise, and robust thermal performance.
FAQ
What is the minimum operating current for LM4050BEM3-10?
The LM4050BEM3-10 requires a minimum operating current of 100 μA (typical) at 25°C to maintain regulation within specification. This value increases slightly over temperature - up to 110 μA across the full −40°C to 125°C range - and must be supplied via an external series resistor from the input voltage rail. Below this threshold, the device exits regulation and output voltage drops nonlinearly.
Is LM4050BEM3-10 pin-compatible with other LM4050 variants?
Yes, LM4050BEM3-10 shares identical SOT-23 (DBZ) pinout and footprint with all LM4050-N family members, including LM4050AIM3-10 and LM4050CEM3-10. Pin 1 is Cathode, Pin 2 is Anode (ground), and Pin 3 is NC - no layout change is needed when substituting between grades or voltage options in the same package.
Does LM4050BEM3-10 require an output capacitor?
No, LM4050BEM3-10 does not require an output capacitor for stability. Its internal design tolerates any capacitive load, including >100 nF, without oscillation or phase margin degradation. This eliminates a common BOM item and simplifies PCB layout in space-constrained designs.
What is the maximum operating current for LM4050BEM3-10?
The LM4050BEM3-10 supports a maximum operating current of 15 mA, limited by power dissipation and junction temperature. At 10 V output, this corresponds to 150 mW maximum power dissipation. Derating is required above 25°C ambient - e.g., at 85°C, max current drops to ~10.5 mA assuming typical RθJA = 287°C/W - to keep junction temperature below 150°C.
How does LM4050BEM3-10 compare to series voltage references like REF5010?
LM4050BEM3-10 is a shunt reference requiring an external series resistor and sinking current to regulate, whereas REF5010 is a series reference sourcing current and requiring an output capacitor. LM4050BEM3-10 offers smaller SOT-23 size and simpler biasing but trades off absolute accuracy (±0.2% vs ±0.05%) and lower noise (150 μVrms vs ~4 μVrms). The topologies are not electrically interchangeable without circuit redesign.
LM4050BEM3-10 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):
- 10V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 150µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 110 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050BEM3-10 FAQ
1.How can I place an order for LM4050BEM3-10 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050BEM3-10 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 LM4050BEM3-10 reliable?
The price and inventory of LM4050BEM3-10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050BEM3-10 is usually 5 days.
3.What payment methods are accepted for LM4050BEM3-10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050BEM3-10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050BEM3-10?
LM4050BEM3-10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050BEM3-10 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 LM4050BEM3-10?
For technical support, including LM4050BEM3-10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050BEM3-10 requirements.
6.How does Aetrix verify that LM4050BEM3-10 is sourced from the original manufacturer or authorized distributors?
All LM4050BEM3-10 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 LM4050BEM3-10 meets industry standards.
7.What is the process for return or replacement of LM4050BEM3-10?
All LM4050BEM3-10 units undergo pre-shipment inspection (PSI). If there is an issue with LM4050BEM3-10, 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 LM4050BEM3-10 part is unused and in its original packaging.
Return procedure for LM4050BEM3-10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050BEM3-10 Tags
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