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Texas Instruments LM4050BEM3X-4.1/NOPB
- Part No.:
- LM4050BEM3X-4.1/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050BEM3X-4.1/NOPB.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,818
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Product details
Overview
LM4050BEM3X-4.1/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 4.096 V reverse breakdown voltage with ±8.2 mV (±0.2%) initial tolerance at 25°C, 50 ppm/°C max temperature coefficient, and 93 μVrms wideband noise (10 Hz–10 kHz). It operates from 73 μA to 15 mA, enabling use in low-power data acquisition and portable instrumentation.
For engineers reviewing the LM4050BEM3X-4.1/NOPB datasheet, LM4050BEM3X-4.1/NOPB pinout, LM4050BEM3X-4.1/NOPB application, or LM4050BEM3X-4.1/NOPB equivalent, this device serves as a space-constrained, capacitor-tolerant voltage reference requiring no external stabilization capacitor while supporting stable operation across capacitive loads and industrial temperature ranges (−40°C to 85°C).
Technical Context
The LM4050BEM3X-4.1/NOPB uses bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation, ensuring monotonic stability over −40°C to 85°C. Its dynamic impedance remains ≤0.5 Ω at 1 mA, enabling high PSRR rejection in precision analog front-ends.
It functions as a two-terminal shunt regulator: cathode accepts input current and sets reference voltage via reverse breakdown; anode connects to ground; terminal 3 is NC. No output capacitor is required, and it tolerates arbitrary capacitive loading without oscillation-critical for battery-powered sensor nodes and ADC biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal reverse breakdown voltage - provides exact 12-bit full-scale scaling for 4.096 V ADC references. |
| Initial Tolerance | ±8.2 mV (±0.2%) at 25°C - enables single-point calibration elimination in mid-accuracy instrumentation. |
| Temp Coefficient | ≤50 ppm/°C max (−40°C to 85°C) - ensures <±0.5 mV drift over full industrial range, critical for stable sensor excitation. |
| Operating Current | 73 μA min to 15 mA max - supports ultra-low-power wake-up circuits and high-current DAC reference buffers. |
| Output Noise | 93 μVrms (10 Hz–10 kHz) - limits quantization uncertainty in 16-bit+ data acquisition systems. |
| Dynamic Impedance | 0.5 Ω typical at 1 mA - maintains regulation accuracy under fast load transients in multiplexed analog systems. |
| Long-Term Stability | 120 ppm (1000 hrs) - ensures calibration retention in unattended field-deployed equipment. |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, surface-mount, 3-pin configuration with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage sense node | Accepts input current; reverse breakdown voltage develops between Cathode and Anode - must be driven by current source or series resistor. |
| Anode (Pin 2) | Reference ground return | Common connection point for load and current source return - must be low-impedance ground path for regulation accuracy. |
| NC (Pin 3) | No internal connection | Electrically isolated; may be left floating or tied to Anode per layout best practice - no functional impact. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Eliminates BOM cost and board area for stabilization - simplifies layout in space-constrained wearables and IoT nodes. |
| Tolerates capacitive loads | Stable with any value of output capacitance - enables direct buffering into SAR ADC sample capacitors without phase-margin risk. |
| Fixed 4.096 V output | Matches standard 12-bit full-scale binary weight (212 = 4096) - eliminates scaling math in firmware for integer-based ADC processing. |
| Industrial temperature range | Specified from −40°C to +85°C - qualified for deployment in factory automation, energy meters, and outdoor environmental sensors. |
| Low 73 μA minimum current | Enables operation from high-value bias resistors (e.g., 1 MΩ @ 5 V), reducing quiescent power in always-on monitoring circuits. |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter with 16-bit sigma-delta ADC and battery-powered operation. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 4.096 V reference for ADC conversion and analog front-end gain calibration. Use Value: Enables 0.01% measurement accuracy over temperature without recalibration, leveraging ±0.2% initial tolerance and 50 ppm/°C drift control. |
Use Scenario: Modular DAQ module with multiple 12-bit ADC channels sampling sensor outputs. IC Role / Device Role / Timing Role: Shared precision reference for simultaneous sampling - minimizes channel-to-channel offset variation. Use Value: 93 μVrms noise and 0.5 Ω dynamic impedance ensure consistent LSB resolution across all channels under varying load conditions. |
| Energy Management | Precision Audio Components |
Use Scenario: Smart electricity meter measuring RMS voltage/current using isolated ADCs. IC Role / Device Role / Timing Role: Reference for metrology-grade ADCs performing harmonic analysis and billing-grade accuracy measurements. Use Value: 120 ppm long-term stability ensures calibration validity over 10-year field life, meeting IEC 62053-21 Class 0.2 requirements. |
Use Scenario: High-fidelity audio DAC PCB requiring low-noise analog supply rail for I/V conversion stage. IC Role / Device Role / Timing Role: Low-noise voltage reference for op-amp biasing in discrete R-2R ladder interface networks. Use Value: 93 μVrms noise floor avoids audible hiss modulation, while 4.096 V output aligns with 16-bit DAC full-scale headroom design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C41IDBZR | Same 4.096 V output, ±0.5% initial tolerance (C-grade), higher 150 μVrms noise, 100 μA min operating current | Lower accuracy and higher noise - suitable only for non-critical biasing or cost-sensitive consumer designs | Select when budget constraints outweigh precision requirements and long-term stability is not mandated. |
| REF43FH41IDBVR | 4.096 V, ±0.05% initial tolerance, 4.5 μVrms noise, 1.2 mA min current, SO-8 package | Higher precision and lower noise but requires external capacitor, larger footprint, and higher quiescent current | Choose for metrology-grade systems where 0.05% tolerance and sub-5 μV noise justify added complexity and cost. |
Compared with TL4050C41IDBZR, LM4050BEM3X-4.1/NOPB delivers tighter tolerance and lower noise at micropower current; versus REF43FH41IDBVR, it trades absolute precision for ultra-low current operation and SOT-23 compactness - ideal for battery longevity and PCB real estate constraints.
Availability
LM4050BEM3X-4.1/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, data acquisition systems, and energy management applications requiring stable component supply, guaranteed traceability, and lifecycle continuity.
Supply support for LM4050BEM3X-4.1/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-volume manufacturing reliability.
The LM4050-N product line delivers micropower shunt references optimized for space-constrained, battery-operated, and industrial-grade measurement systems - emphasizing zero-capacitor stability, wide current range, and robust thermal performance.
FAQ
What is the minimum operating current for LM4050BEM3X-4.1/NOPB?
The LM4050BEM3X-4.1/NOPB requires a minimum operating current of 73 μA at 25°C, rising to 78 μA over the extended industrial temperature range (−40°C to 85°C). This low threshold allows use with high-value bias resistors, making LM4050BEM3X-4.1/NOPB well-suited for ultra-low-power sensor interfaces and battery-backed monitoring circuits where quiescent current must be minimized.
Does LM4050BEM3X-4.1/NOPB require an output capacitor?
No, LM4050BEM3X-4.1/NOPB does not require an output capacitor for stability. Its internal design eliminates the need for external stabilization, and it tolerates arbitrary capacitive loads without oscillation. This feature simplifies layout and reduces BOM count - a key advantage of LM4050BEM3X-4.1/NOPB in compact, high-density PCBs used in portable medical devices and handheld test equipment.
What is the temperature coefficient specification for LM4050BEM3X-4.1/NOPB?
The LM4050BEM3X-4.1/NOPB has a maximum average temperature coefficient of 50 ppm/°C over the industrial temperature range (−40°C to 85°C). This means its 4.096 V output drifts no more than ±0.5 mV across that range - a critical parameter for LM4050BEM3X-4.1/NOPB in applications like precision thermocouple amplifiers and RTD signal conditioning where ambient temperature variation directly impacts measurement fidelity.
How does the noise performance of LM4050BEM3X-4.1/NOPB compare to other shunt references?
LM4050BEM3X-4.1/NOPB delivers 93 μVrms wideband noise (10 Hz–10 kHz), measured at 100 μA operating current. This is significantly lower than standard shunt references like TL4050 (150 μVrms) and competitive with many series references in its class. For LM4050BEM3X-4.1/NOPB, this low noise supports 16-bit+ data acquisition without additional filtering, preserving signal integrity in high-resolution sensor front-ends.
Is LM4050BEM3X-4.1/NOPB qualified for automotive applications?
No, LM4050BEM3X-4.1/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-4.1/NOPB-Q1), which is AEC-Q100 Grade 1 qualified (−40°C to 125°C) and manufactured on an automotive-grade flow. LM4050BEM3X-4.1/NOPB itself is rated for −40°C to 85°C and intended for industrial, portable, and general-purpose precision applications.
LM4050BEM3X-4.1/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):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 93µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 78 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050BEM3X-4.1/NOPB FAQ
1.How can I place an order for LM4050BEM3X-4.1/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050BEM3X-4.1/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-4.1/NOPB reliable?
The price and inventory of LM4050BEM3X-4.1/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-4.1/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050BEM3X-4.1/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050BEM3X-4.1/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050BEM3X-4.1/NOPB?
LM4050BEM3X-4.1/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050BEM3X-4.1/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-4.1/NOPB?
For technical support, including LM4050BEM3X-4.1/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050BEM3X-4.1/NOPB requirements.
6.How does Aetrix verify that LM4050BEM3X-4.1/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050BEM3X-4.1/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-4.1/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050BEM3X-4.1/NOPB?
All LM4050BEM3X-4.1/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050BEM3X-4.1/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-4.1/NOPB part is unused and in its original packaging.
Return procedure for LM4050BEM3X-4.1/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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