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Texas Instruments LM4050CIM3-4.1/NOPB
- Part No.:
- LM4050CIM3-4.1/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050CIM3-4.1/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,571
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Product details
Overview
LM4050CIM3-4.1/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a nominal 4.096 V reverse breakdown voltage with ±21 mV (±0.5%) initial tolerance at 25°C, 73 μA minimum operating current, and 50 ppm/°C max temperature coefficient - used for ADC/DAC biasing and sensor excitation in portable instrumentation.
For engineers reviewing the LM4050CIM3-4.1/NOPB datasheet, LM4050CIM3-4.1/NOPB pinout, LM4050CIM3-4.1/NOPB application, or LM4050CIM3-4.1/NOPB equivalent, key selection criteria include industrial temperature range (−40°C to 85°C), no-output-capacitor operation, low 93 μVrms wideband noise (10 Hz–10 kHz), and compatibility with capacitive loads up to 10 nF.
Technical Context
The LM4050CIM3-4.1/NOPB uses bandgap-based Zener-zap trimmed shunt topology with curvature-corrected temperature drift compensation, enabling stable 4.096 V reference output across 73 μA–15 mA operating current and −40°C to 85°C ambient. Its dynamic impedance remains ≤0.5 Ω at 1 mA, supporting high-PSRR analog signal chains.
Unlike series references, it requires an external current source (e.g., resistor or active bias) and sinks all load + reference current through the cathode. Anode connects directly to system ground, and pin 3 is unconnected - enabling compact two-terminal integration in space-constrained PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal; enables precise 12-bit ADC full-scale calibration without scaling resistors |
| Initial Tolerance | ±21 mV (±0.5%) at 25°C; C-grade accuracy suitable for cost-sensitive industrial measurement |
| Temp Coefficient | ≤50 ppm/°C over −40°C to 85°C; ensures <±0.33% total drift across full industrial range |
| Min Operating Current | 73 μA at TA = 85°C; allows ultra-low-power battery operation with high-value bias resistors |
| Wideband Noise | 93 μVrms (10 Hz–10 kHz); supports 16-bit SAR ADCs without additional filtering |
| Dynamic Impedance | 0.5 Ω at 1 mA; maintains <1 mV load regulation error under 1 mA step changes |
| Long-Term Stability | 120 ppm after 1000 hrs; predictable aging for >5-year field deployments |
Pinout & Package
SOT-23 (DBZ) package: 2.92 mm × 1.30 mm body, 3-pin surface-mount, JEDEC MO-178AC compliant. Cathode (pin 1) carries full shunt current; anode (pin 2) is ground reference; pin 3 is NC (no internal connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Current sink / voltage sensing node | Accepts input current and regulates voltage drop across external resistor; must be connected to supply rail via bias network |
| Anode (Pin 2) | Reference ground return | Low-impedance ground path for reference loop; must connect directly to clean system ground plane |
| NC (Pin 3) | No internal connection | Must remain unconnected; floating or tied to ground per layout best practice - no functional impact |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable with 0–10 nF capacitive load; eliminates BOM cost and board area for bypass caps |
| Tolerates capacitive loads | Immune to oscillation with ceramic decoupling on reference node - simplifies layout in mixed-signal systems |
| Fixed 4.096 V output | Matches common 12-bit DAC/ADC full-scale codes (e.g., 4096 LSB = 4.096 V); eliminates gain calibration |
| Micropower operation | 73 μA min current enables >10-year battery life in coin-cell-powered sensors |
| Industrial temp range | Specified from −40°C to 85°C; qualified for factory automation, HVAC, and energy metering |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Battery-powered environmental sensor node measuring temperature/humidity with 16-bit ADC. IC Role / Device Role / Timing Role: Shunt reference providing stable 4.096 V excitation for bridge sensors and reference for ADC conversion. Use Value: Enables 0.01% measurement accuracy over −25°C to 70°C ambient with no warm-up delay or capacitor dependency. |
Use Scenario: 4–20 mA loop-powered pressure transmitter with HART interface. IC Role / Device Role / Timing Role: Precision voltage reference for DAC generating loop current setpoint and sensor signal conditioning. Use Value: Maintains <±0.1% total error over 15-year field life, meeting IEC 61293 Class 0.1 requirements. |
| Energy Metering IC Biasing | Medical Patient Monitor Front-End |
Use Scenario: Polyphase electricity meter using metrology SoC (e.g., ADE7912) requiring accurate analog reference. IC Role / Device Role / Timing Role: Reference source for ADC inputs and internal PGA gain calibration. Use Value: 93 μVrms noise and 50 ppm/°C TC ensure <0.1% energy measurement error across utility grid temperature swings. |
Use Scenario: Portable ECG module digitizing biopotential signals with 24-bit delta-sigma ADC. IC Role / Device Role / Timing Role: Low-noise reference for ADC and analog front-end gain stages. Use Value: Sub-100 μVrms noise floor preserves microvolt-level ECG signal integrity without post-processing correction. |
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, ±0.5% tolerance, SOT-23; 75 μA min current; 100 μVrms noise | Higher noise limits resolution in 16-bit+ systems; identical thermal performance | Valid alternative if TI second-source qualification is required; verify layout for 0.5 Ω Zdyn margin |
| MAX6008BEUR+T | 4.096 V, ±0.2% (B-grade), SOT-23; 65 μA min current; 60 μVrms noise; 20 ppm/°C TC | Lower noise and tighter TC, but higher cost and limited automotive qualification | Preferred where 16-bit accuracy and low drift dominate cost constraints; not AEC-Q100 qualified |
Compared with TL4050C41IDBZR and MAX6008BEUR+T, the LM4050CIM3-4.1/NOPB offers optimal balance of industrial-grade reliability, proven long-term stability (120 ppm), and SOT-23 footprint compatibility - making it ideal for high-volume industrial instrumentation where lifecycle consistency matters more than marginal noise reduction.
Availability
LM4050CIM3-4.1/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, and energy metering applications requiring stable component supply, consistent parametric performance across production lots, and long-term obsolescence management.
Supply support for LM4050CIM3-4.1/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 over 50 years of precision reference design heritage and ISO/TS 16949-certified manufacturing.
The LM4050-N series was engineered for space-constrained, battery-operated measurement systems demanding micropower consumption, zero-output-capacitor simplicity, and guaranteed industrial temperature performance - targeting data acquisition, process control, and portable test equipment.
FAQ
What is the maximum operating current for LM4050CIM3-4.1/NOPB?
The LM4050CIM3-4.1/NOPB supports a maximum operating current of 15 mA across its full industrial temperature range (−40°C to 85°C). This limit ensures safe power dissipation within the SOT-23 package's 280 mW rating at 25°C ambient, with appropriate derating above that temperature per RθJA = 287°C/W.
Does LM4050CIM3-4.1/NOPB require an external output capacitor?
No, the LM4050CIM3-4.1/NOPB does not require an external output capacitor for stability. Its internal design tolerates capacitive loads from 0 to 10 nF without oscillation, enabling direct connection to ADC reference inputs or op-amp feedback nodes without added components.
What is the thermal hysteresis specification for LM4050CIM3-4.1/NOPB?
The LM4050CIM3-4.1/NOPB exhibits 1.148 mV thermal hysteresis over a −40°C to 125°C cycle, measured as the voltage difference at 25°C before and after extreme temperature exposure. This value reflects mechanical stress recovery in the silicon die and is included in total accuracy budgeting for high-repeatability measurement systems.
Can LM4050CIM3-4.1/NOPB operate in extended temperature range (−40°C to 125°C)?
No - the LM4050CIM3-4.1/NOPB is rated only for the industrial temperature range (−40°C to 85°C). For extended range operation, TI offers the LM4050CIM3-4.1QML-SP (military) or LM4050CIM3X-4.1/NOPB (automotive Q1 variant), which are separately qualified and tested to −40°C to 125°C.
How is the output voltage tolerance specified for LM4050CIM3-4.1/NOPB over temperature?
The LM4050CIM3-4.1/NOPB has a C-grade initial tolerance of ±21 mV (±0.5%) at 25°C. Over −40°C to 85°C, total tolerance expands to ±34 mV due to temperature coefficient (≤50 ppm/°C), calculated as ±21 mV ± (50 ppm/°C × 65°C × 4.096 V) = ±34 mV max deviation.
LM4050CIM3-4.1/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:
- ±0.5%
- 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
LM4050CIM3-4.1/NOPB FAQ
1.How can I place an order for LM4050CIM3-4.1/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050CIM3-4.1/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 LM4050CIM3-4.1/NOPB reliable?
The price and inventory of LM4050CIM3-4.1/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050CIM3-4.1/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050CIM3-4.1/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050CIM3-4.1/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050CIM3-4.1/NOPB?
LM4050CIM3-4.1/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050CIM3-4.1/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 LM4050CIM3-4.1/NOPB?
For technical support, including LM4050CIM3-4.1/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050CIM3-4.1/NOPB requirements.
6.How does Aetrix verify that LM4050CIM3-4.1/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050CIM3-4.1/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 LM4050CIM3-4.1/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050CIM3-4.1/NOPB?
All LM4050CIM3-4.1/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050CIM3-4.1/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 LM4050CIM3-4.1/NOPB part is unused and in its original packaging.
Return procedure for LM4050CIM3-4.1/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050CIM3-4.1/NOPB Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
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LM4040CYM3-2.5-TR
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LM4040CYM3-4.1-TR
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LM4040EIM3-2.5/NOPB
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
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LM4040DIM3X-2.5/NOPB
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LM4040DIM3-2.5/NOPB
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AZ431LANTR-G1
Diodes Incorporated
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