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Texas Instruments LM4050AIM3-5.0
- Part No.:
- LM4050AIM3-5.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050AIM3-5.0.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,247
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Product details
Overview
LM4050AIM3-5.0 from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 5.0 V reverse breakdown voltage 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 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/DAC biasing in portable instrumentation.
For engineers reviewing the LM4050AIM3-5.0 datasheet, LM4050AIM3-5.0 pinout, LM4050AIM3-5.0 application, or LM4050AIM3-5.0 equivalent, key selection considerations include its no-output-capacitor-required operation, capacitive-load tolerance, 0.5 Ω dynamic impedance at 1 mA, thermal hysteresis of 1.4 mV, and AEC-Q100 Grade 1 qualification of the automotive variant LM4050QAIM3-5.0.
Technical Context
The LM4050AIM3-5.0 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 without external components. Its low 0.5 Ω dynamic impedance and 41 μVrms noise support high-resolution data acquisition systems requiring minimal added error.
It functions as a two-terminal shunt regulator: cathode accepts input current and sets reference voltage via reverse breakdown; anode connects to ground; pin 3 is unconnected. Minimum operating current is 56 μA at 25°C and 80 μA over full industrial temperature range, with maximum current limited to 15 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal reverse breakdown voltage, fixed and factory-trimmed |
| Initial Tolerance | ±0.1% at 25°C (A grade), enabling <±5 mV absolute error in precision sensor signal chains |
| Temp Coefficient | ≤50 ppm/°C max over −40°C to +125°C, contributing ≤±3.25 mV drift across full range |
| Dynamic Impedance | 0.5 Ω at 1 mA, ensuring <±7.5 mV load regulation error over 1–15 mA operating range |
| Wideband Noise | 41 μVrms (10 Hz–10 kHz), suitable for 16-bit+ SAR ADC reference applications |
| Operating Current | 56–15,000 μA range, supporting ultra-low-power battery operation and high-current buffering |
| Thermal Hysteresis | 1.4 mV (−40°C ↔ +125°C cycling), critical for repeatable calibration in test equipment |
Pinout & Package
SOT-23 (DBZ) package: 3-pin surface-mount, 2.92 mm × 1.30 mm body size, JEDEC MO-178 compatible.
| 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 5.0 V relative to anode |
| Anode (Pin 2) | Reference ground return | Must be connected to system ground; defines 0 V reference point for output voltage |
| NC (Pin 3) | No internal connection | Must remain floating; not bonded internally and has no electrical function |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable operation with zero external capacitance - eliminates BOM cost and layout area for decoupling |
| Tolerates capacitive loads | Remains stable driving ≥1 μF load capacitance - enables direct interface to ADC sample capacitors and LDO inputs |
| Fixed 5.0 V breakdown | Factory-trimmed Zener-zap wafer sort ensures tight initial accuracy without user calibration |
| Low micropower consumption | 56 μA minimum operating current allows use in >10-year battery-powered IoT sensors |
| Industrial & extended temp support | Specified performance from −40°C to +125°C - suitable for under-hood automotive and industrial PLC environments |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Battery-powered environmental monitoring nodes measuring temperature, humidity, and gas concentration with 16-bit ADCs. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 5.0 V excitation and ADC reference voltage. Use Value: ±0.1% initial tolerance and 41 μVrms noise enable <±0.0015% full-scale measurement error without trimming. |
Use Scenario: 4–20 mA loop-powered field transmitters converting RTD or strain gauge signals. IC Role / Device Role / Timing Role: Precision 5.0 V reference for analog front-end gain/offset calibration and DAC feedback. Use Value: 50 ppm/°C max TC and 1.4 mV thermal hysteresis ensure repeatability across ambient temperature swings in factory floors. |
| Automotive Cabin Sensors | Calibration Equipment |
Use Scenario: Occupant detection, air quality, and HVAC control modules in passenger compartments. IC Role / Device Role / Timing Role: AEC-Q100 Grade 1 qualified shunt reference for microcontroller ADC and sensor biasing. Use Value: Extended −40°C to +125°C operation and 15 mA max current support robustness in thermally aggressive cabin zones. |
Use Scenario: Benchtop multimeters and automated test equipment requiring traceable DC voltage standards. IC Role / Device Role / Timing Role: Primary 5.0 V reference source for internal DACs, comparator thresholds, and self-test circuits. Use Value: 120 ppm long-term stability (1000 hrs) and low thermal hysteresis enable recalibration intervals >12 months. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3050AIDBZR | Series reference (not shunt); requires 50 μA quiescent current + load current; 50 ppm/°C TC; 40 μVrms noise | Needs dedicated supply rail; unsuitable for floating or high-side sensing topologies | Choose when system already provides clean 5.5 V+ supply and board space permits extra bypass cap |
| ADR3450ARJZ-R7 | Series reference; 5.0 V output; ±0.1% initial accuracy; 10 ppm/°C TC; 8 μVrms noise; 125 μA IQ | Lower noise and drift but higher supply current; incompatible with shunt-based current-source architectures | Prefer for ultra-high-precision metrology where 10 ppm/°C TC justifies added power and complexity |
Compared with REF3050AIDBZR and ADR3450ARJZ-R7, the LM4050AIM3-5.0 uniquely supports shunt configuration with no supply rail dependency, enabling direct integration into current-loop and high-side sensing designs - while maintaining competitive accuracy and noise at lower quiescent current than the ADR3450.
Availability
LM4050AIM3-5.0 is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, and automotive cabin sensing applications requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4050AIM3-5.0 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 simplified design-in.
FAQ
What is the minimum operating current for LM4050AIM3-5.0 at 25°C?
The LM4050AIM3-5.0 requires a minimum operating current of 56 μA at 25°C to maintain regulation within specifications. This value increases to 80 μA across the full industrial temperature range (−40°C to +85°C) and to 90 μA over the extended range (−40°C to +125°C), as confirmed in Section 6.8 of the SNOS455G datasheet. Operating below this current risks loss of output voltage accuracy.
Does LM4050AIM3-5.0 require an external output capacitor?
No, the LM4050AIM3-5.0 does not require an external output capacitor for stability - a key design advantage explicitly stated in its features. Its internal architecture ensures stability with any capacitive load, including direct connection to ADC input capacitors or LDO bypass caps up to ≥1 μF. This eliminates BOM cost and layout area typically needed for shunt references.
What is the thermal hysteresis specification for LM4050AIM3-5.0?
The LM4050AIM3-5.0 exhibits 1.4 mV thermal hysteresis over a −40°C to +125°C temperature cycle, defined as the voltage difference measured at 25°C after exposure to −40°C versus after exposure to +125°C. This value is specified in Section 6.8 (Electrical Characteristics: 5-V Option) of the SNOS455G datasheet and directly impacts repeatability in calibration-critical applications.
Is LM4050AIM3-5.0 pin-compatible with other LM4050 variants?
Yes, all LM4050 variants - including LM4050AIM3-2.5, LM4050AIM3-4.096, and LM4050AIM3-8.192 - share identical SOT-23 (DBZ) package and pinout (cathode/anode/NC). The only differences are output voltage and corresponding minimum operating current; PCB layout and footprint are fully interchangeable across the family.
What is the wideband noise performance of LM4050AIM3-5.0?
The LM4050AIM3-5.0 delivers 41 μVrms wideband noise over 10 Hz to 10 kHz, as measured at 100 μA operating current. This noise level is specified in Section 6.8 of the SNOS455G datasheet and enables reliable use with 16-bit successive-approximation register (SAR) ADCs without additional filtering, preserving signal integrity in precision data acquisition systems.
LM4050AIM3-5.0 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:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- 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
LM4050AIM3-5.0 FAQ
1.How can I place an order for LM4050AIM3-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AIM3-5.0 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 LM4050AIM3-5.0 reliable?
The price and inventory of LM4050AIM3-5.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050AIM3-5.0 is usually 5 days.
3.What payment methods are accepted for LM4050AIM3-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AIM3-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AIM3-5.0?
LM4050AIM3-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AIM3-5.0 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 LM4050AIM3-5.0?
For technical support, including LM4050AIM3-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AIM3-5.0 requirements.
6.How does Aetrix verify that LM4050AIM3-5.0 is sourced from the original manufacturer or authorized distributors?
All LM4050AIM3-5.0 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 LM4050AIM3-5.0 meets industry standards.
7.What is the process for return or replacement of LM4050AIM3-5.0?
All LM4050AIM3-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AIM3-5.0, 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 LM4050AIM3-5.0 part is unused and in its original packaging.
Return procedure for LM4050AIM3-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050AIM3-5.0 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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LM4041DIM3-ADJ/NOPB
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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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