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Texas Instruments LM4050BEM3-4.1
- Part No.:
- LM4050BEM3-4.1
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050BEM3-4.1.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,868
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Product details
Overview
LM4050BEM3-4.1 from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a fixed 4.096 V reverse breakdown voltage with ±8.2 mV (±0.2%) initial tolerance at 25°C, 73 μA minimum operating current, and 50 ppm/°C max temperature coefficient - used for ADC/DAC biasing, sensor excitation, and portable instrumentation calibration.
For engineers reviewing the LM4050BEM3-4.1 datasheet, LM4050BEM3-4.1 pinout, LM4050BEM3-4.1 application, or LM4050BEM3-4.1 equivalent, key selection criteria include output voltage accuracy over −40°C to 125°C, capacitive load stability without external capacitor, low 93 μVrms wideband noise (10 Hz–10 kHz), and compatibility with space-constrained battery-powered systems requiring stable 4.096 V references.
Technical Context
The LM4050BEM3-4.1 operates as a two-terminal shunt reference, sinking current through its cathode to maintain precise 4.096 V across an external load. Its bandgap-derived Zener-zap trimmed structure provides curvature-corrected temperature drift and low dynamic impedance (0.5 Ω typical at 1 mA).
It functions within 73–15,000 μA operating current range, tolerates unlimited capacitive loads without oscillation, and achieves 120 ppm long-term stability after 1000 hours at 25°C - enabling direct use in high-resolution data acquisition front-ends and automotive-grade sensing circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal; enables exact 12-bit full-scale scaling with 5 V or 3.3 V ADCs |
| Initial Tolerance | ±8.2 mV (±0.2%) at 25°C; B-grade specification ensures tight system-level calibration |
| Temp Coefficient | ≤50 ppm/°C max over −40°C to 125°C; limits voltage drift to ±2.6 mV across full range |
| Min Operating Current | 73 μA at TA = −40°C to 125°C; supports ultra-low-power wake-up and standby modes |
| Dynamic Impedance | 0.5 Ω typical at 1 mA; maintains regulation under fast load transients in precision analog stages |
| Wideband Noise | 93 μVrms (10 Hz–10 kHz); avoids noise-induced quantization errors in 16-bit+ converters |
| Long-Term Stability | 120 ppm after 1000 hrs; reduces recalibration frequency in field-deployed test equipment |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, 3-pin surface-mount configuration with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage reference node | Connects to regulated voltage node; sinks all current required to maintain 4.096 V |
| Anode (Pin 2) | Reference ground return | Must be tied to system ground; forms the 4.096 V potential relative to this point |
| NC (Pin 3) | No internal connection | Left floating per datasheet; no PCB trace or thermal pad connection required |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable operation with any capacitive load up to ∞; eliminates BOM cost and layout area for stabilization cap |
| Fixed 4.096 V output | Matches standard 12-bit DAC/ADC full-scale codes (e.g., 4096 steps × 1 mV); simplifies firmware scaling |
| Industrial & extended temp range | Specified from −40°C to +125°C; suitable for under-hood automotive and industrial edge sensors |
| Low 93 μVrms noise | Enables ≤16-bit effective resolution without external filtering in battery-powered measurement systems |
| 50 ppm/°C max TC | Guarantees <±3 mV total drift across full temperature range - critical for uncalibrated portable instruments |
Applications
| Portable Data Loggers | Automotive Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Battery-powered environmental monitor logging temperature, humidity, and pressure with 16-bit SAR ADC. IC Role / Device Role / Timing Role: Shunt reference providing stable 4.096 V VREF for ADC conversion and sensor bridge excitation. Use Value: Enables single-supply 3.3 V operation with full 12-bit code utilization and <±0.01% gain error over temperature. |
Use Scenario: Engine coolant temperature (ECT) sensor interface in AEC-Q100-compliant ECU. IC Role / Device Role / Timing Role: Precision bias source for ratiometric NTC bridge, referenced to same 4.096 V used by ADC. Use Value: Eliminates ratio-metric error between sensor excitation and ADC reference, improving accuracy to ±0.5°C. |
| Handheld Test Equipment | Industrial Process Transmitters |
|
Use Scenario: Portable multimeter with auto-ranging 24-bit delta-sigma ADC and internal calibration memory. IC Role / Device Role / Timing Role: Primary reference for self-calibration sequence and measurement scaling. Use Value: 120 ppm long-term stability reduces annual recalibration need; 93 μVrms noise avoids averaging overhead. |
Use Scenario: 4–20 mA HART transmitter measuring flow via differential pressure sensor. IC Role / Device Role / Timing Role: Stable excitation voltage for Wheatstone bridge and reference for 16-bit DAC output stage. Use Value: 50 ppm/°C TC and −40°C to +125°C rating ensure <±0.1% span error across harsh plant environments. |
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, C-grade (±0.5%), higher min current (100 μA), 100 μVrms noise | Lower accuracy and higher noise; suited for cost-sensitive non-precision applications | Select when ±0.5% tolerance and relaxed noise specs are acceptable to reduce BOM cost |
| ADR3440ARJZ-R7 | Series reference (not shunt), 4.096 V, ±0.1%, 7 μVrms noise, requires input capacitor | Three-terminal architecture demands additional decoupling and cannot replace shunt topology directly | Choose only if redesign allows series topology and ultra-low noise (<10 μVrms) is mandatory |
Compared with TL4050C41IDBZR and ADR3440ARJZ-R7, the LM4050BEM3-4.1 uniquely balances B-grade accuracy (±0.2%), shunt simplicity, and 93 μVrms noise - making it optimal for space-constrained, battery-operated systems needing verified 4.096 V stability without layout redesign.
Availability
LM4050BEM3-4.1 is available at Aetrix Electronics and suitable for portable instrumentation, automotive sensor modules, and industrial process transmitters requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4050BEM3-4.1 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 automotive-grade qualification.
The LM4050-N product line delivers micropower shunt references optimized for space-constrained, battery-operated, and high-reliability applications - including portable test gear, automotive sensors, and industrial control systems demanding stable voltage references.
FAQ
What is the output voltage tolerance of the LM4050BEM3-4.1 at 25°C?
The LM4050BEM3-4.1 has a B-grade initial tolerance of ±8.2 mV (±0.2%) at 25°C, corresponding to a 4.096 V nominal output. This is confirmed in Section 6.7 of the SNOS455G datasheet under Electrical Characteristics for the 4.1-V option, where LM4050BIM3/LM4050BEM3 specify ±8.2 mV at IR = 100 μA.
Does the LM4050BEM3-4.1 require an external output capacitor?
No, the LM4050BEM3-4.1 does not require an external output capacitor. Its internal design ensures stability with any capacitive load, including infinite capacitance - a key feature highlighted in the "Features" section and validated in the Functional Block Diagram and Application Information sections of the datasheet.
What is the minimum operating current for the LM4050BEM3-4.1 over temperature?
The LM4050BEM3-4.1 requires a minimum operating current of 73 μA across the full industrial temperature range (−40°C to +85°C) and 78 μA over the extended range (−40°C to +125°C), as specified in Table 6.7 "Electrical Characteristics: 4.1-V Option" under the IRMIN parameter.
Is the LM4050BEM3-4.1 qualified for automotive applications?
No - the LM4050BEM3-4.1 is part of the LM4050-N industrial-grade family. For automotive use, TI offers the LM4050-N-Q1 variant (e.g., LM4050BEM3-4.1Q1), which is AEC-Q100 Grade 1 qualified and manufactured on an automotive-grade flow, as stated in the "Features" and "Device Information" sections.
What is the wideband noise performance of the LM4050BEM3-4.1?
The LM4050BEM3-4.1 exhibits 93 μVrms wideband noise over 10 Hz to 10 kHz at IR = 100 μA, per Table 6.7 in the SNOS455G datasheet. This value is measured under standardized conditions and directly impacts achievable effective resolution in high-precision ADC applications.
LM4050BEM3-4.1 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):
- 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
LM4050BEM3-4.1 FAQ
1.How can I place an order for LM4050BEM3-4.1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050BEM3-4.1 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 LM4050BEM3-4.1 reliable?
The price and inventory of LM4050BEM3-4.1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050BEM3-4.1 is usually 5 days.
3.What payment methods are accepted for LM4050BEM3-4.1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050BEM3-4.1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050BEM3-4.1?
LM4050BEM3-4.1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050BEM3-4.1 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 LM4050BEM3-4.1?
For technical support, including LM4050BEM3-4.1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050BEM3-4.1 requirements.
6.How does Aetrix verify that LM4050BEM3-4.1 is sourced from the original manufacturer or authorized distributors?
All LM4050BEM3-4.1 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 LM4050BEM3-4.1 meets industry standards.
7.What is the process for return or replacement of LM4050BEM3-4.1?
All LM4050BEM3-4.1 units undergo pre-shipment inspection (PSI). If there is an issue with LM4050BEM3-4.1, 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 LM4050BEM3-4.1 part is unused and in its original packaging.
Return procedure for LM4050BEM3-4.1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050BEM3-4.1 Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
Diodes Incorporated
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LM4040CYM3-2.5-TR
Microchip Technology
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LM4040CYM3-4.1-TR
Microchip Technology
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LM4040EIM3-2.5/NOPB
Texas Instruments
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
Texas Instruments
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LM4041DIM3-ADJ/NOPB
Texas Instruments
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LM4040DIM3X-2.5/NOPB
Texas Instruments
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LM4040DIM3-2.5/NOPB
Texas Instruments
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AZ431LANTR-G1
Diodes Incorporated
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