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Texas Instruments LM4050CIM3X-4.1/NOPB
- Part No.:
- LM4050CIM3X-4.1/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050CIM3X-4.1/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,273
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Product details
Overview
LM4050CIM3X-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 across −40°C to 85°C industrial range. It serves as a stable reference for ADCs, DACs, and sensor signal conditioning in portable instrumentation.
For engineers reviewing the LM4050CIM3X-4.1/NOPB datasheet, LM4050CIM3X-4.1/NOPB pinout, LM4050CIM3X-4.1/NOPB application, or LM4050CIM3X-4.1/NOPB equivalent, this page provides verified electrical specs, thermal behavior, load regulation performance, and real-world implementation guidance for battery-powered and space-constrained designs.
Technical Context
The LM4050CIM3X-4.1/NOPB uses bandgap-derived Zener-zap trimmed reverse breakdown voltage with curvature-corrected temperature drift compensation. Its shunt topology requires an external series resistor to set operating current, enabling direct replacement of higher-power references without redesigning bias networks.
It achieves stability without output capacitors while tolerating any capacitive load up to 10 μF - a key differentiator from series-mode references. Dynamic impedance remains ≤0.5 Ω at 1 mA, supporting low-noise (<93 μVrms, 10 Hz–10 kHz) operation in high-resolution data acquisition systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal at 100 μA; enables precise 12-bit ADC full-scale calibration (e.g., 4.096 V = 1 LSB = 1 mV) |
| Initial Tolerance | ±21 mV (±0.5%) at 25°C - C-grade accuracy suitable for cost-sensitive industrial sensors and metering |
| Temp Coefficient | ≤50 ppm/°C over −40°C to 85°C - ensures <±3.4 mV drift across full industrial range |
| Min Operating Current | 73 μA at TMAX - supports ultra-low-power sleep modes in battery-backed systems |
| Dynamic Impedance | 0.5 Ω at 1 mA, 120 Hz - minimizes load-induced voltage shift during fast-sampling ADC conversions |
| Wideband Noise | 93 μVrms (10 Hz–10 kHz) - limits quantization error in 16-bit+ data converters |
| Long-Term Stability | 120 ppm after 1000 hrs - predictable aging behavior for field-deployed energy monitoring devices |
Pinout & Package
SOT-23 (DBZ) package: 2.92 mm × 1.30 mm footprint, 3-pin surface-mount, JEDEC MO-178 compatible. Thermal resistance RθJA = 287°C/W (board-mounted).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / reference output node | Connects to supply rail via series resistor; voltage at this node is regulated 4.096 V relative to Anode |
| Anode (Pin 2) | Reference ground return | Must be connected to system ground; forms the 0 V reference point for all downstream circuitry |
| NC (Pin 3) | No internal connection | Left floating per TI specification; no PCB trace or pad required - reduces layout complexity |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Eliminates BOM cost and board area for stability components - simplifies design for wearables and IoT nodes |
| Tolerates capacitive loads | Stable with up to 10 μF output capacitance - allows direct interface to switched-capacitor filters and sample-hold circuits |
| Fixed 4.096 V output | Matches common 12-bit DAC/ADC full-scale ranges (e.g., 4096 codes × 1 mV/code), reducing scaling math in firmware |
| Low 73 μA min current | Enables operation from microamp-level LDOs or energy-harvesting sources - extends battery life in remote sensors |
| Industrial temp range | Specified from −40°C to +85°C - qualified for factory automation, HVAC controls, and outdoor metering enclosures |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
|
Use Scenario: Battery-powered environmental sensor node recording temperature, humidity, and pressure at 1-minute intervals for 5+ years. IC Role / Device Role / Timing Role: Shunt reference for 16-bit SAR ADC and analog front-end op-amps; sets absolute scale for calibrated sensor outputs. Use Value: 73 μA minimum current and 93 μVrms noise enable accurate 16-bit conversion while minimizing quiescent drain on coin-cell batteries. |
Use Scenario: 4–20 mA loop-powered transmitter converting RTD or strain-gauge signals in oil & gas field instruments. IC Role / Device Role / Timing Role: Precision voltage reference for excitation current source and ADC reference; referenced to loop ground (Anode). Use Value: ±21 mV initial tolerance and ≤50 ppm/°C drift ensure <0.1% total error over −40°C to +85°C ambient without calibration. |
| Energy Metering IC Interfaces | Portable Medical Devices |
|
Use Scenario: Class 0.5 electricity meter using metrology AFE (e.g., MSP430i2041) with integrated 24-bit sigma-delta ADC. IC Role / Device Role / Timing Role: External reference replacing internal bandgap to improve DC accuracy and reduce gain drift in revenue-grade measurement. Use Value: 120 ppm long-term stability and thermal hysteresis of 1.148 mV support 10-year calibration intervals in utility-grade hardware. |
Use Scenario: Handheld ECG monitor with single-lead analog front-end and Bluetooth LE wireless transmission. IC Role / Device Role / Timing Role: Low-noise reference for instrumentation amplifier gain-setting and ADC full-scale definition in compact PCB layout. Use Value: SOT-23 size (2.92 × 1.30 mm) and capacitor-free stability allow placement adjacent to AFE ICs without compromising noise immunity. |
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 package; 75 μA min current; 100 ppm/°C max tempco | Higher tempco increases drift by ~1.3 mV over −40°C to 85°C vs. LM4050CIM3X-4.1/NOPB | Acceptable where cost is primary constraint and tighter drift spec is not required |
| REF3040AIDBZR | Series-mode 4.096 V reference; 40 μA quiescent current; requires output capacitor; 50 ppm/°C max tempco | Higher dropout voltage (≈120 mV) limits use in low-voltage battery systems (<3.3 V) | Preferred when load regulation <0.01%/mA is critical and board space permits series architecture |
Compared with TL4050C41IDBZR, LM4050CIM3X-4.1/NOPB offers lower temperature drift (50 vs. 100 ppm/°C) and tighter initial tolerance consistency across production lots; versus REF3040AIDBZR, it eliminates output capacitor requirements and supports lower supply headroom but lacks shutdown control and has higher dynamic impedance.
Availability
LM4050CIM3X-4.1/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, and energy metering applications requiring stable component supply with guaranteed long-term sourcing.
Supply support for LM4050CIM3X-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 analog ICs and industrial-grade reliability.
The LM4050-N product line delivers micropower shunt voltage references optimized for space-constrained, battery-operated, and high-accuracy measurement systems - emphasizing low drift, capacitor-free stability, and wide operating current range.
FAQ
What is the maximum operating current for LM4050CIM3X-4.1/NOPB?
The LM4050CIM3X-4.1/NOPB supports a maximum operating current of 15 mA, as specified in the Absolute Maximum Ratings table. This limit ensures safe power dissipation within the SOT-23 package's thermal constraints (280 mW at 25°C ambient). Exceeding 15 mA risks junction temperature exceeding 150°C, potentially degrading long-term stability or causing permanent damage.
Does LM4050CIM3X-4.1/NOPB require an external capacitor for stability?
No, LM4050CIM3X-4.1/NOPB does not require an external output capacitor for stability. Its internal design ensures unconditional stability with any capacitive load, including up to 10 μF. This eliminates capacitor-related BOM cost, board area, and potential resonance issues - a key advantage over many series-mode references that mandate specific output capacitance values.
What is the thermal hysteresis specification for LM4050CIM3X-4.1/NOPB?
The LM4050CIM3X-4.1/NOPB exhibits 1.148 mV thermal hysteresis over the −40°C to +125°C cycle, defined as the voltage difference measured at 25°C after exposure to −40°C versus after exposure to +125°C. This value reflects mechanical stress memory in the die and directly impacts repeatability in systems undergoing repeated thermal cycling, such as outdoor industrial controllers.
Can LM4050CIM3X-4.1/NOPB be used in automotive applications?
The LM4050CIM3X-4.1/NOPB is rated for industrial temperature range (−40°C to +85°C) and is not AEC-Q100 qualified. For automotive applications, TI offers the LM4050-N-Q1 variant (e.g., LM4050CIM3X-4.1Q/NOPB), which is AEC-Q100 Grade 1 qualified (−40°C to +125°C) and manufactured on an automotive-grade flow - LM4050CIM3X-4.1/NOPB itself is not recommended for under-hood or safety-critical vehicle systems.
How does the minimum operating current of LM4050CIM3X-4.1/NOPB vary with temperature?
The LM4050CIM3X-4.1/NOPB minimum operating current increases from 73 μA at 25°C to 78 μA across the full industrial temperature range (−40°C to +85°C), as confirmed in Section 6.7 of the datasheet. This variation must be accounted for when sizing the series current-limiting resistor to ensure reliable regulation across all operating conditions, especially in cold-weather deployments.
LM4050CIM3X-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
LM4050CIM3X-4.1/NOPB FAQ
1.How can I place an order for LM4050CIM3X-4.1/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050CIM3X-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 LM4050CIM3X-4.1/NOPB reliable?
The price and inventory of LM4050CIM3X-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 LM4050CIM3X-4.1/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050CIM3X-4.1/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050CIM3X-4.1/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050CIM3X-4.1/NOPB?
LM4050CIM3X-4.1/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050CIM3X-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 LM4050CIM3X-4.1/NOPB?
For technical support, including LM4050CIM3X-4.1/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050CIM3X-4.1/NOPB requirements.
6.How does Aetrix verify that LM4050CIM3X-4.1/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050CIM3X-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 LM4050CIM3X-4.1/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050CIM3X-4.1/NOPB?
All LM4050CIM3X-4.1/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050CIM3X-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 LM4050CIM3X-4.1/NOPB part is unused and in its original packaging.
Return procedure for LM4050CIM3X-4.1/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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