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Texas Instruments LM4050AIM3X-4.1
- Part No.:
- LM4050AIM3X-4.1
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050AIM3X-4.1.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,446
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Product details
Overview
LM4050AIM3X-4.1 from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 4.096 V reverse breakdown voltage with ±0.1% initial tolerance (A grade), 50 ppm/°C max temperature coefficient, and 93 μVrms wideband noise (10 Hz–10 kHz). It operates from 73 μA to 15 mA, supports capacitive loads without external compensation, and targets high-accuracy analog signal chains in space-constrained systems.
For engineers reviewing the LM4050AIM3X-4.1 datasheet, LM4050AIM3X-4.1 pinout, LM4050AIM3X-4.1 application, or LM4050AIM3X-4.1 equivalent, key selection criteria include its fixed 4.096 V output, industrial/extended temperature range support (−40°C to +125°C), no-output-capacitor requirement, low dynamic impedance (0.5 Ω), and AEC-Q100 Grade 1 qualification for automotive use cases.
Technical Context
The LM4050AIM3X-4.1 uses bandgap-based Zener-zap trimmed shunt topology with curvature-corrected temperature drift compensation, enabling stable 4.096 V reference across −40°C to +125°C. Its fuse-trimmed wafer-sort process ensures ±0.1% initial accuracy at 25°C.
It functions as a two-terminal shunt regulator: cathode sinks current while anode connects to ground; the NC pin (Pin 3) is unconnected. Dynamic impedance remains ≤0.5 Ω at 1 mA, and thermal hysteresis is limited to 1.148 mV over −40°C ↔ +125°C cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal reverse breakdown voltage - enables precise 12-bit ADC/DAC full-scale calibration and 4.096 V system rail sensing. |
| Initial Tolerance | ±0.1% at 25°C (A grade) - eliminates post-manufacturing trimming in production test fixtures and portable instrumentation. |
| Temp Coefficient | ≤50 ppm/°C over −40°C to +125°C - ensures ≤±2.6 mV drift across full industrial/automotive temperature range. |
| Operating Current | 73 μA min to 15 mA max - supports ultra-low-power sensor nodes and high-current precision DAC buffers. |
| Output Noise | 93 μVrms (10 Hz–10 kHz) - meets SNR requirements for 16-bit data acquisition systems without additional filtering. |
| Dynamic Impedance | 0.5 Ω at 1 mA - minimizes load-induced voltage shift during fast transient current demands in mixed-signal SoCs. |
| Long-Term Stability | 120 ppm (1000 hrs @ 25°C) - guarantees reference integrity over multi-year deployment in energy metering and medical devices. |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, 3-pin surface-mount configuration with exposed pad not present. Pin 1 (Cathode) carries shunt current and input voltage; Pin 2 (Anode) is ground reference; Pin 3 (NC) has no internal connection and must be left floating or tied to Pin 2 per TI design guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current sink / reference voltage node | Connects to regulated voltage rail via series resistor; voltage develops across this terminal relative to Anode. |
| Anode (Pin 2) | Ground reference terminal | Must be connected to system ground; defines 0 V reference for all output measurements and stability calculations. |
| NC (Pin 3) | No internal connection | Electrically isolated; TI specifies it may be left floating or shorted to Pin 2 - no routing or PCB trace required. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable operation with any capacitive load up to 10 µF - eliminates BOM cost and layout area for external stabilization caps. |
| Tolerates capacitive loads | Guaranteed phase margin >45° with 0–10 µF output capacitance - enables direct interface to ADC input buffers and op-amp feedback networks. |
| Fuse/Zener-zap voltage trim | Wafer-sort trimming achieves ±0.1% initial accuracy without post-package adjustment - reduces test time and yield loss. |
| Low quiescent current | 73 μA minimum operating current - extends battery life in portable gas detectors and handheld multimeters. |
| AEC-Q100 Grade 1 qualified | Rated for −40°C to +125°C junction temperature - validated for engine control units, ADAS power supplies, and automotive infotainment references. |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld digital multimeter requiring stable 4.096 V reference for 12-bit ADC full-scale calibration under varying battery voltage and ambient temperature. IC Role / Device Role / Timing Role: Shunt voltage reference providing high-accuracy, low-drift DC bias for ADC reference input and internal DAC calibration. Use Value: ±0.1% initial tolerance and ≤50 ppm/°C drift ensure measurement repeatability within 0.02% across −10°C to +50°C operating range. |
Use Scenario: Industrial PLC analog input module digitizing 4–20 mA sensor signals with 16-bit resolution and <1 LSB error over 10-year field life. IC Role / Device Role / Timing Role: Precision shunt reference for programmable gain amplifier (PGA) and sigma-delta ADC reference path. Use Value: 93 μVrms noise and 120 ppm long-term stability maintain ENOB ≥15.2 bits without recalibration. |
| Automotive Power Management | Precision Audio Signal Chain |
Use Scenario: Battery management system (BMS) cell voltage monitor in EV traction battery pack, operating from −40°C to +105°C ambient. IC Role / Device Role / Timing Role: Temperature-stable shunt reference for high-side current sense amplifier and isolated ADC reference. Use Value: AEC-Q100 Grade 1 qualification and 1.148 mV thermal hysteresis ensure consistent 1 mV cell voltage resolution after thermal cycling. |
Use Scenario: High-fidelity audio DAC reference in studio-grade headphone amplifier, where supply ripple and noise directly modulate analog output. IC Role / Device Role / Timing Role: Low-noise, low-drift DC reference for DAC VREF pin and analog output stage biasing. Use Value: 93 μVrms noise floor and 0.5 Ω dynamic impedance suppress power supply coupling, preserving >110 dB THD+N performance. |
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 output and SOT-23 package, but C grade (±0.5% initial tolerance) and higher 100 ppm/°C tempco. | Acceptable for cost-sensitive industrial sensors where ±0.5% accuracy suffices and temperature range is limited to −25°C to +85°C. | Select when budget constraints outweigh need for A-grade precision and extended temperature capability. |
| ADR3440ARJZ-R7 | 4.096 V series reference in SOT-23; requires minimum 100 μA supply current and 1 μF output cap; 10 μVrms noise (lower), but 30 ppm/°C tempco. | Better noise performance suits ultra-low-noise audio, but series architecture increases dropout sensitivity and complicates low-voltage battery designs. | Prefer for noise-critical audio DACs powered from stable 5 V rails; avoid in battery-powered shunt-configured systems. |
Compared with TL4050C41IDBZR and ADR3440ARJZ-R7, the LM4050AIM3X-4.1 uniquely combines A-grade accuracy, shunt topology flexibility, no-capacitor operation, and AEC-Q100 qualification - making it optimal for automotive and portable precision measurement where layout simplicity and thermal robustness are critical.
Availability
LM4050AIM3X-4.1 is available at Aetrix Electronics and suitable for portable instrumentation, automotive power management, and precision data acquisition systems requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LM4050AIM3X-4.1 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 expertise in precision reference design and automotive-grade component validation.
The LM4050-N product line delivers micropower shunt voltage references optimized for space-constrained, high-accuracy applications including battery-powered test equipment, automotive subsystems, and industrial data converters - emphasizing zero-capacitor stability and wafer-level trimming.
FAQ
What is the exact output voltage and tolerance of the LM4050AIM3X-4.1?
The LM4050AIM3X-4.1 provides a nominal reverse breakdown voltage of 4.096 V with an initial tolerance of ±0.1% at 25°C (A grade). This specification is production-tested and guaranteed across the industrial temperature range (−40°C to +85°C) and extended range (−40°C to +125°C), with overtemperature tolerance calculated as ±0.1% ± (50 ppm/°C × ΔT × 4.096 V).
Does the LM4050AIM3X-4.1 require an external output capacitor?
No, the LM4050AIM3X-4.1 does not require an external output capacitor for stability. Its internal design tolerates any capacitive load from 0 to 10 µF without oscillation, eliminating the need for external compensation components and simplifying PCB layout for compact designs.
What is the minimum operating current for the LM4050AIM3X-4.1?
The LM4050AIM3X-4.1 requires a minimum operating current of 73 μA at 25°C, increasing to 78 μA over the extended temperature range (−40°C to +125°C). This low quiescent current enables use in ultra-low-power applications such as battery-operated sensors and portable meters.
Is the LM4050AIM3X-4.1 qualified for automotive applications?
Yes, the LM4050AIM3X-4.1 is part of the LM4050-N-Q1 family and is AEC-Q100 Grade 1 qualified, rated for operation from −40°C to +125°C junction temperature. It meets automotive reliability and stress testing requirements for use in engine control, ADAS, and infotainment power supply references.
How does the LM4050AIM3X-4.1 compare to the LM4050BIM3X-4.1?
The LM4050AIM3X-4.1 differs from the LM4050BIM3X-4.1 primarily in initial voltage tolerance: A grade is ±0.1%, while B grade is ±0.2%. Both share identical package (SOT-23), temperature range, noise (93 μVrms), and dynamic impedance (0.5 Ω), but the A grade offers tighter accuracy for high-end metrology and calibration equipment.
LM4050AIM3X-4.1 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):
- 4.096V
- 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:
- 73 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050AIM3X-4.1 FAQ
1.How can I place an order for LM4050AIM3X-4.1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AIM3X-4.1 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 LM4050AIM3X-4.1 reliable?
The price and inventory of LM4050AIM3X-4.1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050AIM3X-4.1 is usually 5 days.
3.What payment methods are accepted for LM4050AIM3X-4.1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AIM3X-4.1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AIM3X-4.1?
LM4050AIM3X-4.1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AIM3X-4.1 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 LM4050AIM3X-4.1?
For technical support, including LM4050AIM3X-4.1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AIM3X-4.1 requirements.
6.How does Aetrix verify that LM4050AIM3X-4.1 is sourced from the original manufacturer or authorized distributors?
All LM4050AIM3X-4.1 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 LM4050AIM3X-4.1 meets industry standards.
7.What is the process for return or replacement of LM4050AIM3X-4.1?
All LM4050AIM3X-4.1 units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AIM3X-4.1, 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 LM4050AIM3X-4.1 part is unused and in its original packaging.
Return procedure for LM4050AIM3X-4.1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050AIM3X-4.1 Tags
-
TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
Diodes Incorporated
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LM4040CYM3-2.5-TR
Microchip Technology
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LM4040CYM3-4.1-TR
Microchip Technology
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LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
Texas Instruments
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LM4041DIM3-ADJ/NOPB
Texas Instruments
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LM4040DIM3X-2.5/NOPB
Texas Instruments
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LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
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