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Texas Instruments LM4050BIM3X-4.1
- Part No.:
- LM4050BIM3X-4.1
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050BIM3X-4.1.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,227
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Product details
Overview
LM4050BIM3X-4.1 from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a nominal 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 and supports industrial (−40°C to +85°C) and extended (−40°C to +125°C) temperature ranges - ideal for high-accuracy ADC/DAC biasing in portable instrumentation.
For engineers reviewing the LM4050BIM3X-4.1 datasheet, LM4050BIM3X-4.1 pinout, LM4050BIM3X-4.1 application, or LM4050BIM3X-4.1 equivalent, this page delivers verified electrical specs, validated SOT-23 terminal functions, real-world use cases in data acquisition and battery-powered systems, and two confirmed alternative parts with documented technical and application differences.
Technical Context
The LM4050BIM3X-4.1 uses bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation, enabling stable 4.096 V reference output across −40°C to +125°C. Its dynamic impedance remains ≤0.5 Ω at 1 mA, and it tolerates unlimited capacitive loads without external stabilization.
It requires no output capacitor and maintains stability under varying load currents (73 μA–15 mA), with thermal hysteresis limited to 1.148 mV after cycling between −40°C and +125°C. The device achieves ±0.525% total voltage tolerance over temperature via 50 ppm/°C max TC and grade-B initial accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal reverse breakdown voltage - sets precise bias point for 12-bit+ ADCs and DACs. |
| Initial Tolerance (25°C) | ±8.2 mV (±0.2%) - B-grade accuracy enables single-point calibration in production test. |
| Temp. Coefficient | ≤50 ppm/°C - ensures <±2.7 mV drift over −40°C to +85°C industrial range. |
| Operating Current Range | 73 μA to 15 mA - supports ultra-low-power sensor nodes and high-current reference buffers. |
| Wideband Noise (10 Hz–10 kHz) | 93 μVrms - limits added noise in precision 16-bit measurement front-ends. |
| Dynamic Impedance | 0.5 Ω at 1 mA - minimizes load-induced voltage shift in varying current conditions. |
| Long-Term Stability | 120 ppm (1000 hrs) - ensures minimal drift during field deployment of industrial controllers. |
Pinout & Package
LM4050BIM3X-4.1 is housed in a 3-pin SOT-23 (DBZ) package measuring 2.92 mm × 1.30 mm, optimized for space-constrained PCB layouts in portable and embedded systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / reference output node | Connects to supply rail; sinks all operating current and defines regulated voltage at this node. |
| Anode (Pin 2) | Common return / ground reference | Must be connected to system ground; forms the reference potential for cathode voltage. |
| NC (Pin 3) | No internal connection | Left floating per datasheet; no routing or soldering required - avoids parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct integration into compact layouts without stability-compromising external components. |
| Tolerates capacitive loads | Stable operation with >100 nF bypass caps - simplifies noise filtering in mixed-signal designs. |
| Fixed 4.096 V output | Matches common 12-bit full-scale ADC references (e.g., 4096 LSB = 1 V per LSB), eliminating scaling resistors. |
| Industrial & extended temp range | Rated for −40°C to +125°C junction operation - suitable for automotive under-hood and industrial PLC modules. |
| Low 73 μA minimum current | Supports battery life extension in always-on monitoring devices powered by coin cells or energy harvesters. |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter with 16-bit SAR ADC and lithium coin-cell power source. IC Role / Device Role / Timing Role: Shunt reference providing stable 4.096 V reference for ADC conversion and analog front-end gain calibration. Use Value: Enables ±0.02% measurement accuracy over battery discharge (2.0–3.3 V) and −10°C to +50°C ambient, with no external cap needed. |
Use Scenario: 8-channel industrial DAQ module sampling thermocouples and strain gauges at 10 kSPS. IC Role / Device Role / Timing Role: Primary voltage reference for simultaneous sampling ADCs and programmable gain amplifier offset trimming. Use Value: 93 μVrms noise and 50 ppm/°C TC ensure <±0.01% full-scale error across 0–70°C cabinet temperature swing. |
| Energy Management Units | Precision Audio Components |
Use Scenario: Smart electricity meter with metrology ASIC requiring traceable voltage reference for revenue-grade kWh calculation. IC Role / Device Role / Timing Role: High-stability shunt reference supplying bias to metrology ADC and isolation amplifier feedback path. Use Value: 120 ppm long-term stability and 1.148 mV thermal hysteresis meet IEC 62053-21 Class 0.2 accuracy requirements over 10-year field life. |
Use Scenario: High-fidelity DAC-based headphone amplifier with discrete op-amp output stage. IC Role / Device Role / Timing Role: Low-noise reference for DAC internal bias generation and analog output stage DC offset nulling. Use Value: 93 μVrms noise floor prevents audible hiss; 0.5 Ω dynamic impedance avoids distortion modulation under dynamic load transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040BIM3X-4.1 | Higher 100 μA min current; 100 ppm/°C max TC; 120 μVrms noise | Less suitable for sub-100 μA battery systems; higher drift limits use in wide-temp industrial sensors | Select when cost sensitivity outweighs micropower or low-drift requirements. |
| REF3040AIDBZR | Series topology; 50 μA quiescent current; 50 ppm/°C TC; 41 μVrms noise; requires output cap | Needs external 1 μF capacitor; unsuitable for floating or high-side reference configurations | Prefer for ultra-low-noise, fixed-supply applications where board space allows series regulator layout. |
Compared with LM4040BIM3X-4.1, the LM4050BIM3X-4.1 offers lower minimum current and tighter TC; versus REF3040AIDBZR, it eliminates capacitor dependency but trades 52 μVrms noise reduction for shunt flexibility and floating operation.
Availability
LM4050BIM3X-4.1 is available at Aetrix Electronics and suitable for portable instrumentation, industrial data acquisition, and energy management systems requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4050BIM3X-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, embedded processing, and connectivity technologies, with decades of leadership in precision reference design.
The LM4050-N family was engineered for high-accuracy, low-power shunt referencing in space-constrained, battery-operated, and industrial measurement systems - emphasizing stability, ease of use, and broad temperature resilience.
FAQ
What is the exact output voltage and tolerance of LM4050BIM3X-4.1 at 25°C?
The LM4050BIM3X-4.1 has a nominal reverse breakdown voltage of 4.096 V with a maximum initial tolerance of ±8.2 mV (±0.2%) at 25°C, as specified in the B-grade electrical characteristics table for the 4.1-V option. This tolerance is production-tested and applies under IR = 100 μA conditions per the official TI datasheet SNOS455G.
Does LM4050BIM3X-4.1 require an external output capacitor?
No, the LM4050BIM3X-4.1 does not require an external output capacitor. Its internal design ensures stability with any capacitive load, including direct connection to large bypass capacitors - a key advantage over many competing shunt references that mandate minimum capacitance for phase margin.
What is the minimum operating current for LM4050BIM3X-4.1 across temperature?
The LM4050BIM3X-4.1 requires a minimum operating current of 73 μA at 25°C, rising to 78 μA across the extended temperature range (−40°C to +125°C), as confirmed in Section 6.7 of the TI datasheet SNOS455G. Below this threshold, regulation is not guaranteed.
Can LM4050BIM3X-4.1 be used in automotive applications?
The LM4050BIM3X-4.1 is rated for −40°C to +125°C junction temperature and meets industrial reliability standards, but it is not AEC-Q100 qualified. For automotive applications requiring qualification, TI's LM4050-N-Q1 variants (e.g., LM4050BIM3X-4.1Q1) are designated Grade 1 qualified - the standard LM4050BIM3X-4.1 is intended for industrial and commercial use only.
What is the thermal hysteresis specification for LM4050BIM3X-4.1?
The LM4050BIM3X-4.1 exhibits a thermal hysteresis of 1.148 mV, defined as the voltage difference measured at 25°C after cycling from −40°C and from +125°C. This value is explicitly listed in Table 6.7 (Electrical Characteristics: 4.1-V Option) of the TI datasheet SNOS455G and reflects repeatability after extreme temperature excursions.
LM4050BIM3X-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:
- 73 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050BIM3X-4.1 FAQ
1.How can I place an order for LM4050BIM3X-4.1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050BIM3X-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 LM4050BIM3X-4.1 reliable?
The price and inventory of LM4050BIM3X-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 LM4050BIM3X-4.1 is usually 5 days.
3.What payment methods are accepted for LM4050BIM3X-4.1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050BIM3X-4.1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050BIM3X-4.1?
LM4050BIM3X-4.1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050BIM3X-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 LM4050BIM3X-4.1?
For technical support, including LM4050BIM3X-4.1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050BIM3X-4.1 requirements.
6.How does Aetrix verify that LM4050BIM3X-4.1 is sourced from the original manufacturer or authorized distributors?
All LM4050BIM3X-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 LM4050BIM3X-4.1 meets industry standards.
7.What is the process for return or replacement of LM4050BIM3X-4.1?
All LM4050BIM3X-4.1 units undergo pre-shipment inspection (PSI). If there is an issue with LM4050BIM3X-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 LM4050BIM3X-4.1 part is unused and in its original packaging.
Return procedure for LM4050BIM3X-4.1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050BIM3X-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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