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Texas Instruments LM4050CIM3-5.0/NOPB
- Part No.:
- LM4050CIM3-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050CIM3-5.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,101
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Product details
Overview
LM4050CIM3-5.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 5.0 V reverse breakdown voltage with ±25 mV (±0.5%) initial tolerance at 25°C, 50 ppm/°C max temperature coefficient, and 93 μVrms wideband noise (10 Hz–10 kHz). It operates from 56 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 biasing in portable instrumentation.
For engineers reviewing the LM4050CIM3-5.0/NOPB datasheet, LM4050CIM3-5.0/NOPB pinout, LM4050CIM3-5.0/NOPB application, or LM4050CIM3-5.0/NOPB equivalent, key selection criteria include its no-output-capacitor-required operation, capacitive-load tolerance, 0.5% grade accuracy, SOT-23 footprint compatibility, and automotive-grade alternatives for safety-critical designs.
Technical Context
The LM4050CIM3-5.0/NOPB uses bandgap-based Zener-zap trimmed shunt topology with curvature-corrected temperature drift compensation, enabling stable 5.0 V reference output across −40°C to +125°C. Its dynamic impedance is 0.5 Ω at 1 mA, and it maintains regulation without external capacitance due to internal stability design.
It functions as a two-terminal shunt device: cathode accepts input current and sets reference voltage via reverse breakdown, while anode connects to system ground. The NC pin (Pin 3) is unconnected and must be left floating or tied to Pin 2 per datasheet guidance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal reverse breakdown voltage, fixed and non-adjustable |
| Initial Tolerance (25°C) | ±25 mV (±0.5%) - defines worst-case DC error before temperature or load effects |
| Temp Coefficient | 50 ppm/°C max - contributes ≤±3.25 mV error over −40°C to +85°C industrial range |
| Operating Current Range | 56 μA to 15 mA - enables ultra-low-power sensor biasing and high-current DAC reference use |
| Wideband Noise (10 Hz–10 kHz) | 93 μVrms typical - limits resolution in 16-bit+ data acquisition systems |
| Dynamic Impedance | 0.5 Ω at 1 mA - ensures <1 mV output shift per 0.5 mA load change |
| Long-Term Stability | 120 ppm after 1000 hrs - supports calibration integrity in field-deployed equipment |
Pinout & Package
SOT-23 (DBZ) package, 3-pin, body size 2.92 mm × 1.30 mm, surface-mount, JEDEC-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / reference voltage node | Connects to regulated supply rail; voltage develops across external resistor to set operating current |
| Anode (Pin 2) | Ground reference terminal | Must be connected to system ground; forms return path for shunt current |
| NC (Pin 3) | No internal connection | Must be left floating or tied to Pin 2 - not usable as feedback or bypass node |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables space-constrained PCB layouts without stability-compromising external C |
| Tolerates capacitive loads | Stable with any downstream capacitance - simplifies filtering for ADC reference inputs |
| Fixed 5.0 V breakdown voltage | Eliminates external resistor network; reduces BOM count and layout sensitivity |
| Industrial & extended temp support | Validated operation from −40°C to +125°C - suitable for under-hood automotive and outdoor industrial use |
| Low 56 μA minimum current | Extends battery life in portable multimeters and handheld test gear |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld digital multimeter requiring stable 5 V reference for 16-bit SAR ADC. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise bias for ADC internal reference buffer. Use Value: ±25 mV initial tolerance and 50 ppm/°C TC ensure <0.01% full-scale error across operating temperature. |
Use Scenario: Modular DAQ module with multiple analog input channels sharing one precision reference. IC Role / Device Role / Timing Role: Central 5 V shunt reference sourcing current to multiple op-amp buffers and ADCs. Use Value: 0.5 Ω dynamic impedance minimizes crosstalk-induced voltage droop during channel switching. |
| Process Control Sensors | Precision Audio Components |
Use Scenario: 4–20 mA loop-powered temperature transmitter with onboard signal conditioning. IC Role / Device Role / Timing Role: Reference for RTD bridge excitation and PGA gain-setting resistors. Use Value: 93 μVrms noise floor avoids degrading SNR in sub-100 μV sensor outputs. |
Use Scenario: High-fidelity audio DAC requiring low-noise, thermally stable reference for analog output stage. IC Role / Device Role / Timing Role: Fixed 5 V reference for DAC's internal voltage-to-current conversion circuitry. Use Value: Thermal hysteresis of 1.4 mV ensures repeatable offset after thermal cycling in studio equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040CIM3-5.0/NOPB | Higher 100 ppm/°C max TC; 100 μA min current; same SOT-23 package and 5 V output | Lower accuracy and higher power - suitable only where cost outweighs precision | Select when ±1% tolerance and relaxed thermal performance are acceptable |
| REF3050AIDBZR | Series topology; 5.0 V output; 50 ppm/°C TC; requires output capacitor; 60 μA quiescent current | Higher PSRR and lower noise (41 μVrms), but needs external cap and cannot sink current | Prefer for noise-sensitive, single-supply systems where shunt topology is incompatible |
Compared with LM4040CIM3-5.0/NOPB, LM4050CIM3-5.0/NOPB delivers tighter initial tolerance and lower temperature drift; compared with REF3050AIDBZR, it offers shunt flexibility and capacitor-free operation but lacks series-regulator PSRR advantages.
Availability
LM4050CIM3-5.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, data acquisition systems, and process control sensors requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LM4050CIM3-5.0/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, embedded processing, and connectivity technologies, with decades of leadership in precision analog ICs.
The LM4050-N product line delivers micropower shunt voltage references optimized for space-constrained, battery-operated, and high-accuracy measurement systems - emphasizing low drift, low noise, and robust thermal performance.
FAQ
What is the maximum operating current for LM4050CIM3-5.0/NOPB?
The LM4050CIM3-5.0/NOPB supports a maximum operating current of 15 mA, as specified in the Absolute Maximum Ratings table. Exceeding this value risks permanent damage due to power dissipation limits - at 25°C ambient, the SOT-23 package allows up to 280 mW, corresponding to 15 mA × 5 V = 75 mW, well within safe margin. Derating applies above 25°C per RθJA = 287°C/W.
Does LM4050CIM3-5.0/NOPB require an external capacitor for stability?
No, LM4050CIM3-5.0/NOPB does not require an external output capacitor for stability. Its internal design ensures unconditional stability with any capacitive load, including direct connection to ADC reference inputs or op-amp buffers. This eliminates board area, cost, and reliability risk associated with external ceramic capacitors.
What is the temperature coefficient specification for LM4050CIM3-5.0/NOPB?
The LM4050CIM3-5.0/NOPB has a maximum average temperature coefficient of 50 ppm/°C over the full operating range (−40°C to +125°C). At 5.0 V output, this translates to a worst-case drift of ±3.25 mV across the industrial range (−40°C to +85°C) and ±5.0 mV across the extended range (−40°C to +125°C).
Can Pin 3 (NC) of LM4050CIM3-5.0/NOPB be used as a thermal pad or ground connection?
No - Pin 3 of LM4050CIM3-5.0/NOPB is explicitly designated "No internal connection" in the datasheet. It must be left floating or connected to Pin 2 (Anode) per TI's guidance. Using it as a thermal pad or ground violates the device's mechanical and electrical specifications and may compromise thermal performance or cause parametric shifts.
How does LM4050CIM3-5.0/NOPB compare to the A-grade version LM4050AIM3-5.0/NOPB?
The LM4050CIM3-5.0/NOPB has ±25 mV (±0.5%) initial tolerance at 25°C, while LM4050AIM3-5.0/NOPB offers ±5 mV (±0.1%). Both share identical 50 ppm/°C max TC, 93 μVrms noise, and SOT-23 packaging. Choose LM4050CIM3-5.0/NOPB for cost-sensitive applications where 0.5% accuracy suffices; select the A-grade for metrology-grade calibration or high-resolution ADC front-ends.
LM4050CIM3-5.0/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):
- 5V
- 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:
- 80 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050CIM3-5.0/NOPB FAQ
1.How can I place an order for LM4050CIM3-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050CIM3-5.0/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 LM4050CIM3-5.0/NOPB reliable?
The price and inventory of LM4050CIM3-5.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050CIM3-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050CIM3-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050CIM3-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050CIM3-5.0/NOPB?
LM4050CIM3-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050CIM3-5.0/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 LM4050CIM3-5.0/NOPB?
For technical support, including LM4050CIM3-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050CIM3-5.0/NOPB requirements.
6.How does Aetrix verify that LM4050CIM3-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050CIM3-5.0/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 LM4050CIM3-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050CIM3-5.0/NOPB?
All LM4050CIM3-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050CIM3-5.0/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 LM4050CIM3-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM4050CIM3-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050CIM3-5.0/NOPB Tags
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