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Texas Instruments LM4050BEM3X-10
- Part No.:
- LM4050BEM3X-10
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050BEM3X-10.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,856
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Product details
Overview
LM4050BEM3X-10 from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 10 V reverse breakdown voltage with ±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 serves as a compact, capacitor-free reference for high-accuracy ADC biasing and sensor excitation in portable instrumentation.
For engineers reviewing the LM4050BEM3X-10 datasheet, LM4050BEM3X-10 pinout, LM4050BEM3X-10 application, or LM4050BEM3X-10 equivalent, key selection criteria include its 10 V output stability under varying load current (ΔVR/ΔIR ≤ 12 mV over 1–15 mA), low 150 μVrms wideband noise (10 Hz–10 kHz), and guaranteed operation without external output capacitance - critical for space-constrained battery-powered systems requiring long-term voltage accuracy.
Technical Context
The LM4050BEM3X-10 uses bandgap-based Zener-zap trimmed shunt topology with curvature-corrected temperature drift compensation, enabling stable 10 V reference performance across industrial and extended temperature ranges. Its dynamic impedance remains ≤0.7 Ω at 1 mA, supporting tight regulation even with rapidly varying sink currents.
Unlike series references, it functions as a two-terminal device requiring only an external current-limiting resistor; its cathode-anode configuration allows flexible placement in feedback loops or as a precision clamp. The NC pin (Pin 3) is unconnected and must be left floating or tied to Anode per TI's DBZ package specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 10 V nominal reverse breakdown voltage, calibrated at 150 μA test current - defines precise bias point for analog signal chains. |
| Initial Tolerance | ±0.2% at 25°C (B-grade) - ensures ≤±20 mV absolute error before temperature or aging effects. |
| Temp Coefficient | ≤50 ppm/°C over −40°C to 125°C - limits drift to ≤±5 mV across full operating range. |
| Min Operating Current | 100 μA - sets minimum bias current for stable regulation; below this, reference ceases to regulate. |
| Dynamic Impedance | 0.7 Ω max at 1 mA, 120 Hz - enables low-load-regulation error (<12 mV) under 15 mA sink variation. |
| Wideband Noise | 150 μVrms (10 Hz–10 kHz) - supports high-resolution data acquisition without added filtering overhead. |
| Long-Term Stability | 120 ppm after 1000 hrs - corresponds to <±1.2 mV drift, critical for calibration-critical systems. |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, 3-pin surface-mount configuration with exposed thermal pad not connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage sense node | Connects to supply rail via current-limiting resistor; voltage at this node is regulated to 10 V relative to Anode. |
| Anode (Pin 2) | Reference ground / common return | Must be connected to system ground or low-impedance return path; all regulation is referenced to this terminal. |
| NC (Pin 3) | No internal connection | Electrically isolated; leave floating or tie to Pin 2 per TI recommendation - no routing or PCB trace required. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable operation with zero external capacitance - eliminates BOM cost, board area, and startup delay in ultra-low-power designs. |
| Tolerates capacitive loads | Remains stable with any value of output capacitance - simplifies filtering for noise-sensitive applications like precision audio. |
| Fixed 10 V breakdown voltage | Factory-trimmed Zener-zap calibration ensures exact 10 V output without user trimming - reduces calibration labor and test time. |
| Extended temperature range | Rated for −40°C to +125°C operation - suitable for under-hood automotive and industrial control environments. |
| Low quiescent current | 100 μA minimum operating current enables use in microamp-level battery systems - extends operational lifetime significantly. |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter front-end with 16-bit SAR ADC and battery-powered operation. IC Role / Device Role / Timing Role: Shunt reference providing stable 10 V excitation for precision resistive divider and ADC reference input. Use Value: Enables ±0.02% measurement accuracy over temperature without recalibration, leveraging 50 ppm/°C TC and 120 ppm long-term stability. |
Use Scenario: Modular DAQ module acquiring thermocouple and RTD signals in factory-floor PLC racks. IC Role / Device Role / Timing Role: Primary voltage reference for dual-slope integrator and multiplexed ADC reference switching. Use Value: Delivers consistent 10 V reference across multiple channels with <12 mV load regulation error, eliminating per-channel gain trim. |
| Energy Management Units | Precision Audio Components |
Use Scenario: Smart meter power monitoring IC requiring accurate voltage scaling for mains sensing. IC Role / Device Role / Timing Role: High-stability reference for isolated voltage divider feeding isolation amplifier input. Use Value: Maintains <±20 mV absolute error over 10-year field life (120 ppm drift), meeting IEC 62053-21 Class 0.2 accuracy requirements. |
Use Scenario: High-fidelity DAC output stage requiring ultra-low-noise bias for op-amp rails. IC Role / Device Role / Timing Role: Low-noise 10 V reference supplying clean analog supply to precision op-amps and filters. Use Value: 150 μVrms broadband noise avoids audible hiss in 24-bit audio paths, eliminating need for additional LDO filtering. |
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 | Same 10 V output, C-grade (±0.5% initial tolerance), higher min current (150 μA), 75 ppm/°C TC | Lower accuracy and higher tempco - suitable for cost-sensitive, non-critical biasing where ±50 mV error is acceptable | Select when budget constraints outweigh precision needs; verify 150 μA bias availability in target design. |
| REF5010AIDR | 10 V series reference, ±0.05% initial tolerance, 3 ppm/°C TC, requires output capacitor, 1.2 mA quiescent | Higher accuracy and lower drift but consumes >10× more current and needs external cap - incompatible with ultra-low-power layouts | Choose only if sub-1 ppm/°C stability and <±0.5 mV error are mandatory; not drop-in due to topology and pinout differences. |
Compared with TL4050C10IDBZR, LM4050BEM3X-10 delivers twice the initial accuracy and half the tempco at same package size; versus REF5010AIDR, it achieves 92% lower quiescent current and eliminates capacitor dependency - making it optimal for battery-operated, space-limited precision analog systems.
Availability
LM4050BEM3X-10 is available at Aetrix Electronics and suitable for portable instrumentation, energy management units, and precision audio components requiring stable component supply with guaranteed long-term manufacturability.
Supply support for LM4050BEM3X-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 and embedded processing technologies, with decades of expertise in precision voltage references and power management ICs.
The LM4050-N product line was designed specifically for space-constrained, micropower applications demanding high initial accuracy and low temperature drift - targeting portable test equipment, industrial sensors, and automotive subsystems.
FAQ
What is the minimum operating current for LM4050BEM3X-10?
The LM4050BEM3X-10 requires a minimum operating current of 100 μA to maintain regulation at 10 V. Below this threshold, the device exits its specified breakdown region and output voltage collapses. This value is verified across −40°C to 125°C and is critical when sizing the series current-limiting resistor in battery-powered designs.
Does LM4050BEM3X-10 require an external output capacitor?
No, the LM4050BEM3X-10 does not require an external output capacitor for stability. Its internal design ensures unconditional stability with any capacitive load, including zero capacitance - a key advantage over many shunt references that mandate minimum COUT to prevent oscillation.
What is the temperature coefficient specification for LM4050BEM3X-10?
The LM4050BEM3X-10 has a maximum temperature coefficient of 50 ppm/°C over the full −40°C to +125°C range. This translates to a worst-case drift of ±5 mV across the entire temperature span, enabling predictable performance in automotive and industrial environments without active compensation.
Can LM4050BEM3X-10 be used in automotive applications?
Yes - while the standard LM4050BEM3X-10 is rated for −40°C to +125°C, TI also offers the automotive-qualified LM4050BEM3X-10Q1 (AEC-Q100 Grade 1). For non-automotive industrial use, the LM4050BEM3X-10 meets extended temperature requirements and has been deployed in under-dash modules with proven reliability.
What is the purpose of Pin 3 (NC) on LM4050BEM3X-10?
Pin 3 is a no-connect terminal with no internal bond wire or silicon connection. Per TI's DBZ package documentation, it must be left floating or tied to Pin 2 (Anode); routing it elsewhere or leaving it unconnected on PCB does not affect functionality but improves mechanical robustness during reflow.
LM4050BEM3X-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
LM4050BEM3X-10 FAQ
1.How can I place an order for LM4050BEM3X-10 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050BEM3X-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 LM4050BEM3X-10 reliable?
The price and inventory of LM4050BEM3X-10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050BEM3X-10 is usually 5 days.
3.What payment methods are accepted for LM4050BEM3X-10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050BEM3X-10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050BEM3X-10?
LM4050BEM3X-10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050BEM3X-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 LM4050BEM3X-10?
For technical support, including LM4050BEM3X-10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050BEM3X-10 requirements.
6.How does Aetrix verify that LM4050BEM3X-10 is sourced from the original manufacturer or authorized distributors?
All LM4050BEM3X-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 LM4050BEM3X-10 meets industry standards.
7.What is the process for return or replacement of LM4050BEM3X-10?
All LM4050BEM3X-10 units undergo pre-shipment inspection (PSI). If there is an issue with LM4050BEM3X-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 LM4050BEM3X-10 part is unused and in its original packaging.
Return procedure for LM4050BEM3X-10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050BEM3X-10 Tags
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