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Texas Instruments LM4050BIM3-4.1/NOPB
- Part No.:
- LM4050BIM3-4.1/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050BIM3-4.1/NOPB.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:25,303
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Product details
Overview
LM4050BIM3-4.1/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a fixed 4.096 V reverse breakdown voltage with ±0.2% initial tolerance (B-grade), 50 ppm/°C max temperature coefficient, and 73–78 μA minimum operating current across −40°C to 125°C. It enables stable reference generation in low-power data acquisition and portable instrumentation where space and quiescent current are critical.
For engineers reviewing the LM4050BIM3-4.1/NOPB datasheet, LM4050BIM3-4.1/NOPB pinout, LM4050BIM3-4.1/NOPB application, or LM4050BIM3-4.1/NOPB equivalent, key selection criteria include its no-output-capacitor-required operation, capacitive-load tolerance, 0.5 Ω dynamic impedance at 1 mA, 93 μVrms wideband noise (10 Hz–10 kHz), and industrial/extended temperature range support.
Technical Context
The LM4050BIM3-4.1/NOPB uses bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation, ensuring stable 4.096 V output under varying load (60 μA–15 mA) and temperature (−40°C to 125°C). Its low dynamic impedance (0.5 Ω typical) and absence of required external stabilization capacitor simplify layout while maintaining stability with any capacitive load.
It operates as a two-terminal device: cathode accepts input current and sets reference voltage via reverse breakdown, anode connects to ground, and pin 3 is unconnected. The device achieves ±0.2% initial accuracy at 25°C and maintains ≤±22 mV total tolerance over the industrial temperature range (−40°C to 85°C) and ≤±29 mV over extended range (−40°C to 125°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal; precise value enables 12-bit ADC full-scale calibration without scaling resistors. |
| Initial Tolerance (25°C) | ±0.2% (B-grade); ensures ≤±8.2 mV absolute error at room temperature for high-accuracy systems. |
| Temp Coefficient | ≤50 ppm/°C max; contributes ≤±3.3 mV drift over −40°C to 85°C ambient range. |
| Min Operating Current | 73 μA (industrial), 78 μA (extended temp); supports ultra-low-power sleep modes in battery systems. |
| Dynamic Impedance | 0.5 Ω at 1 mA; minimizes load-induced voltage shift during fast transient current demands. |
| Wideband Noise | 93 μVrms (10 Hz–10 kHz); limits added noise in precision 16-bit+ measurement front-ends. |
| Long-Term Stability | 120 ppm (1000 hrs); corresponds to ~0.5 mV drift over 6 months, critical for maintenance-free field instruments. |
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 / reference voltage node | Connects to regulated supply rail; voltage develops across external series resistor and this pin. |
| Anode (Pin 2) | Ground reference terminal | Must be connected to system ground; defines 0 V reference for output voltage measurement. |
| NC (Pin 3) | No internal connection | Left floating per datasheet; no routing or soldering required-reduces PCB routing complexity. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Eliminates BOM cost and board area for stabilization cap; simplifies design validation for space-constrained wearables. |
| Tolerates capacitive loads | Stable with >100 nF load capacitance; enables direct buffering into SAR ADC sample-and-hold inputs without oscillation risk. |
| Fixed 4.096 V output | Matches common 12-bit DAC/ADC full-scale codes (212 = 4096); removes gain calibration in digital multimeters and sensor transmitters. |
| Industrial & extended temp range | Specified from −40°C to 125°C; supports under-hood automotive modules and industrial PLC I/O cards without derating. |
| Low 93 μVrms noise | Enables <1 LSB noise contribution in 16-bit systems at 4.096 V FS; avoids need for external low-noise op-amp buffering. |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Battery-powered environmental monitors logging temperature, humidity, and pressure over weeks on coin-cell power. IC Role / Device Role / Timing Role: Shunt reference providing stable 4.096 V excitation and ADC reference for ratiometric sensor measurements. Use Value: 73 μA min operating current enables >10-year battery life; ±0.2% tolerance ensures <0.1% measurement uncertainty without field recalibration. |
Use Scenario: 4–20 mA loop-powered pressure transmitter operating in factory environments up to 85°C. IC Role / Device Role / Timing Role: Precision voltage reference for DAC-controlled current output stage and analog front-end signal conditioning. Use Value: 50 ppm/°C tempco limits zero-drift to <0.05% FS over temperature; SOT-23 footprint fits tight PCB real estate near sensor ASIC. |
| Automotive Cabin Sensors | Test & Measurement Equipment |
Use Scenario: Occupant detection and air quality sensing modules mounted near HVAC ducts with ambient swings from −40°C to 125°C. IC Role / Device Role / Timing Role: Reference source for microcontroller ADC measuring CO₂, VOC, and particulate sensor outputs. Use Value: Extended temperature rating eliminates thermal derating; 120 ppm long-term stability ensures calibration validity over 5-year vehicle service life. |
Use Scenario: Benchtop multimeter front-end requiring sub-0.01% DC voltage accuracy and low noise for 6½-digit resolution. IC Role / Device Role / Timing Role: Primary shunt reference feeding precision op-amp buffers and auto-zero amplifiers in measurement path. Use Value: 0.5 Ω dynamic impedance prevents loading errors during fast settling; 93 μVrms noise stays below 1 LSB of 20 V range at 6½-digit resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3040AIDBZR | Series reference (not shunt); requires 2.2 V min input, 50 μA quiescent current, 50 ppm/°C tempco, 4.096 V output. | Needs dedicated supply rail ≥4.1 V; unsuitable for current-loop or floating-sense topologies where shunt topology is mandatory. | Select when system has clean, regulated supply and board space allows extra decoupling; avoid when sharing supply with noisy digital circuits. |
| ADR3440ARJZ-R7 | Series reference; 4.096 V output, ±0.1% initial accuracy, 30 ppm/°C tempco, 12 μA quiescent, but requires ≥4.2 V input and 2-pin operation only. | Cannot replace shunt topology directly; lacks cathode/anode flexibility for current-source biasing or floating reference configurations. | Prefer for ultra-low-power battery devices with stable ≥4.2 V rail; not viable for 3.3 V systems or 2-wire sensor interfaces. |
Compared with REF3040AIDBZR and ADR3440ARJZ-R7, the LM4050BIM3-4.1/NOPB uniquely supports true 2-terminal operation, works from any current-limited source (including 3.3 V supplies with series resistor), and tolerates capacitive loads without instability-making it irreplaceable in loop-powered, space-constrained, or floating-reference designs.
Availability
LM4050BIM3-4.1/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, automotive cabin sensors, and test & measurement equipment requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4050BIM3-4.1/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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and industrial-grade components.
The LM4050-N product line delivers micropower shunt references optimized for space-constrained, battery-operated, and high-accuracy measurement systems-designed specifically for data acquisition, portable instrumentation, and automotive sensor interfaces.
FAQ
What is the exact output voltage and tolerance of the LM4050BIM3-4.1/NOPB?
The LM4050BIM3-4.1/NOPB provides a nominal reverse breakdown voltage of 4.096 V with ±0.2% initial tolerance at 25°C (B-grade specification). Over the industrial temperature range (−40°C to 85°C), total tolerance is ±22 mV; over the extended range (−40°C to 125°C), it is ±29 mV. This is confirmed in Section 6.7 of the SNOS455G datasheet.
Does the LM4050BIM3-4.1/NOPB require an external output capacitor?
No, the LM4050BIM3-4.1/NOPB does not require an external output capacitor for stability. Its internal design ensures unconditional stability with any capacitive load, including >100 nF, eliminating the need for a stabilization capacitor and reducing BOM count and PCB area-explicitly stated in the Features section of the datasheet.
What are the minimum and maximum operating current limits for the LM4050BIM3-4.1/NOPB?
The LM4050BIM3-4.1/NOPB requires a minimum operating current of 73 μA (industrial range) or 78 μA (extended range), and supports up to 15 mA maximum shunt current. These values ensure proper regulation and are specified in Table 6.7 (Electrical Characteristics: 4.1-V Option) of the SNOS455G datasheet.
How does the LM4050BIM3-4.1/NOPB compare to the A-grade version LM4050AIM3-4.1/NOPB?
The LM4050BIM3-4.1/NOPB has ±0.2% initial tolerance versus ±0.1% for the A-grade LM4050AIM3-4.1/NOPB. Both share identical 4.096 V nominal output, 50 ppm/°C max tempco, SOT-23 package, and operating current range. The B-grade offers lower cost where ±0.2% accuracy suffices, such as in 12-bit data loggers or non-critical sensor interfaces.
Is the LM4050BIM3-4.1/NOPB suitable for automotive applications?
The LM4050BIM3-4.1/NOPB is rated for −40°C to 125°C extended temperature operation and meets industrial reliability standards, but it is not AEC-Q100 qualified. For automotive applications requiring formal qualification, TI's LM4050-N-Q1 series (e.g., LM4050BIM3X-4.1/NOPB-Q1) is the designated AEC-Q100 Grade 1 option-distinct from the standard LM4050BIM3-4.1/NOPB.
LM4050BIM3-4.1/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:
- Active
- 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
LM4050BIM3-4.1/NOPB FAQ
1.How can I place an order for LM4050BIM3-4.1/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050BIM3-4.1/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 LM4050BIM3-4.1/NOPB reliable?
The price and inventory of LM4050BIM3-4.1/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050BIM3-4.1/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050BIM3-4.1/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050BIM3-4.1/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050BIM3-4.1/NOPB?
LM4050BIM3-4.1/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050BIM3-4.1/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 LM4050BIM3-4.1/NOPB?
For technical support, including LM4050BIM3-4.1/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050BIM3-4.1/NOPB requirements.
6.How does Aetrix verify that LM4050BIM3-4.1/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050BIM3-4.1/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 LM4050BIM3-4.1/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050BIM3-4.1/NOPB?
All LM4050BIM3-4.1/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050BIM3-4.1/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 LM4050BIM3-4.1/NOPB part is unused and in its original packaging.
Return procedure for LM4050BIM3-4.1/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050BIM3-4.1/NOPB Tags
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