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Texas Instruments LM4050AIM3-2.0/NOPB
- Part No.:
- LM4050AIM3-2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050AIM3-2.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,230
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Product details
Overview
LM4050AIM3-2.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering 2.048 V nominal output with ±0.1% initial tolerance (A grade), 50 ppm/°C max temperature coefficient, and 41 μVrms wideband noise (10 Hz–10 kHz). It operates from 60 μA to 15 mA reverse current 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 LM4050AIM3-2.0/NOPB datasheet, LM4050AIM3-2.0/NOPB pinout, LM4050AIM3-2.0/NOPB application, or LM4050AIM3-2.0/NOPB equivalent, key selection considerations include its no-output-capacitor-required stability, low dynamic impedance (0.3 Ω at 1 mA), thermal hysteresis of 0.7 mV, and compatibility with capacitive loads - critical for space-constrained, battery-powered measurement systems.
Technical Context
The LM4050AIM3-2.0/NOPB uses bandgap-derived Zener-zap trimmed reverse breakdown voltage with curvature-corrected temperature drift compensation, enabling stable 2.048 V reference across −40°C to +125°C. Its shunt topology requires external current-setting resistor but eliminates need for output capacitor while maintaining stability with any capacitive load.
It features fuse-trimmed wafer-sort calibration for ±0.1% accuracy at 25°C (A grade), low 60 μA minimum operating current, and 120 ppm long-term stability after 1000 hours. Dynamic impedance remains ≤0.3 Ω at 1 mA, supporting fast transient response in precision analog signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal - exact binary-compatible value for 12-bit systems (211 × 1 mV) |
| Initial Tolerance | ±0.1% at 25°C (A grade) - enables single-point calibration in high-resolution data acquisition |
| Temp Coefficient | ≤50 ppm/°C (max) - ensures <±0.33 mV drift over −40°C to +85°C industrial range |
| Min Operating Current | 60 μA - supports ultra-low-power operation in energy-harvesting sensor nodes |
| Dynamic Impedance | 0.3 Ω at 1 mA - minimizes load-induced voltage shift in varying-current applications |
| Wideband Noise | 41 μVrms (10 Hz–10 kHz) - preserves SNR in 16-bit+ ADC front-ends |
| Thermal Hysteresis | 0.7 mV - limits repeatability error after thermal cycling in field-deployed equipment |
Pinout & Package
SOT-23 (DBZ) package: 2.92 mm × 1.30 mm footprint, 3-pin surface-mount, JEDEC MO-178AC compliant. Anode (Pin 2) connects to system ground; Cathode (Pin 1) sinks reference current and provides regulated voltage node; Pin 3 is NC (no internal connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / reference output node | Connects to regulated voltage point; sinks all operating current (60 μA–15 mA); must be driven via series resistor from higher supply |
| Anode (Pin 2) | Common return / ground reference | Must be connected directly to system ground plane; defines 0 V reference for output voltage |
| NC (Pin 3) | No internal connection | Left floating per datasheet; no PCB trace or solder required |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Guaranteed stability with any capacitive load - eliminates BOM cost and layout area for decoupling cap |
| Tolerates capacitive loads | Stable into ≥100 nF - enables direct buffering with op-amps or driving SAR ADC sample capacitors |
| Fixed 2.048 V output | Binary-aligned voltage (211 mV) - simplifies full-scale calibration in 12-bit systems without scaling resistors |
| Low 41 μVrms noise | Enables ≤16-bit ENOB in precision data converters without external filtering |
| 60 μA min operating current | Supports operation from microcontroller GPIO pins or low-quiescent LDOs in sleep-mode systems |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter with 16-bit sigma-delta ADC and lithium coin-cell power. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.048 V for ADC full-scale calibration and offset nulling. Use Value: 60 μA minimum current enables >1-year battery life; 0.7 mV thermal hysteresis ensures repeatable measurements after field temperature swings. |
Use Scenario: Industrial PLC analog input module with 8-channel simultaneous-sampling ADC. IC Role / Device Role / Timing Role: Per-channel precision reference for ratiometric sensor excitation and ADC reference. Use Value: 0.3 Ω dynamic impedance prevents channel-to-channel crosstalk during multiplexed sampling; ±0.1% tolerance eliminates per-channel gain trim. |
| Energy Monitoring Meters | Precision Audio DAC Biasing |
Use Scenario: DIN-rail mounted kWh meter using isolated current/voltage sensors and metrology-grade ADC. IC Role / Device Role / Timing Role: Primary voltage reference for anti-aliasing filter biasing and ADC reference in Class 0.2 metering IC. Use Value: 120 ppm long-term stability meets IEC 62053-21 10-year accuracy requirements; 50 ppm/°C TC ensures compliance across −25°C to +70°C enclosure range. |
Use Scenario: High-fidelity audio DAC board requiring ultra-low-noise analog supply for I/V conversion stage. IC Role / Device Role / Timing Role: Low-noise 2.048 V reference for op-amp bias network in discrete R-2R ladder interface. Use Value: 41 μVrms noise contributes <−108 dBu to total THD+N; SOT-23 footprint allows placement adjacent to DAC die for minimal loop area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431CDBZR | 2.5 V fixed output; ±2% initial tolerance; 500 mV typical cathode-anode voltage drop | Requires higher headroom supply; unsuitable for sub-2.5 V systems or 12-bit binary alignment | Select when 2.5 V reference suffices and tighter tolerance is not required; lower cost but higher noise (120 μVrms) |
| REF3020AIDBZR | 2.048 V output; ±0.2% initial tolerance; 50 ppm/°C TC; 25 μVrms noise; 50 μA quiescent current | Series topology - needs output capacitor; higher PSRR but requires ≥2.3 V supply | Choose for lower noise and better PSRR where board space permits output cap and higher supply is available |
Compared with TL431CDBZR and REF3020AIDBZR, the LM4050AIM3-2.0/NOPB uniquely combines 2.048 V binary alignment, ±0.1% A-grade tolerance, and shunt topology with no-output-capacitor operation - making it optimal for compact, low-headroom, high-accuracy measurement circuits where supply margin is constrained.
Availability
LM4050AIM3-2.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial data acquisition, energy metering, precision audio design, and automotive body electronics requiring stable component supply and long-lifecycle support.
Supply support for LM4050AIM3-2.0/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 and embedded processing technologies, with decades of leadership in precision reference design and high-reliability manufacturing.
The LM4050-N product line delivers micropower shunt references optimized for space-constrained, battery-operated, and high-accuracy measurement systems - targeting instrumentation, industrial automation, and energy infrastructure applications.
FAQ
What is the maximum operating current for LM4050AIM3-2.0/NOPB?
The LM4050AIM3-2.0/NOPB supports a maximum operating current of 15 mA, as specified in Absolute Maximum Ratings. 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 rise beyond 150°C, potentially degrading long-term reliability or causing permanent damage. The device maintains regulation across its full 60 μA to 15 mA operating range.
Does LM4050AIM3-2.0/NOPB require an external output capacitor?
No, the LM4050AIM3-2.0/NOPB does not require an external output capacitor. Its internal design ensures stability with any capacitive load, including direct connection to ADC input capacitors or op-amp inputs. This eliminates the need for a dedicated decoupling capacitor, reducing BOM count and PCB area - a key advantage over many competing shunt and series references that mandate specific output capacitance for phase margin.
What is the thermal hysteresis specification for LM4050AIM3-2.0/NOPB?
The LM4050AIM3-2.0/NOPB has a thermal hysteresis of 0.7 mV, measured as the voltage difference at 25°C after cycling between −40°C and +125°C. This parameter quantifies repeatability error due to thermal history and is critical for applications requiring consistent calibration across environmental cycles - such as field-deployed test equipment or outdoor energy meters. It is guaranteed across the extended temperature range.
Can LM4050AIM3-2.0/NOPB be used in automotive applications?
The LM4050AIM3-2.0/NOPB is rated for industrial (−40°C to +85°C) and extended (−40°C to +125°C) temperature ranges, but it is not AEC-Q100 qualified. For automotive applications requiring qualification, TI offers the LM4050-N-Q1 variant (e.g., LM4050QAIM3-2.0/NOPB), which is AEC-Q100 Grade 1 qualified and manufactured on an automotive-grade flow. Use LM4050AIM3-2.0/NOPB only in non-safety-critical automotive subsystems where qualification is not mandated.
What is the long-term stability of LM4050AIM3-2.0/NOPB?
The LM4050AIM3-2.0/NOPB exhibits 120 ppm reverse breakdown voltage drift after 1000 hours of operation at 25°C and 100 μA reverse current. This long-term stability metric reflects parametric shift under accelerated aging conditions and supports design-in confidence for 10+ year field deployments in industrial and energy infrastructure applications. It is measured per JEDEC JESD22-A117 standard.
LM4050AIM3-2.0/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:
- Discontinued at Digi-Key
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 34µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 65 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050AIM3-2.0/NOPB FAQ
1.How can I place an order for LM4050AIM3-2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AIM3-2.0/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 LM4050AIM3-2.0/NOPB reliable?
The price and inventory of LM4050AIM3-2.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050AIM3-2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050AIM3-2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AIM3-2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AIM3-2.0/NOPB?
LM4050AIM3-2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AIM3-2.0/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 LM4050AIM3-2.0/NOPB?
For technical support, including LM4050AIM3-2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AIM3-2.0/NOPB requirements.
6.How does Aetrix verify that LM4050AIM3-2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050AIM3-2.0/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 LM4050AIM3-2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050AIM3-2.0/NOPB?
All LM4050AIM3-2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AIM3-2.0/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 LM4050AIM3-2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4050AIM3-2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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