My Inquiry
My Account
Texas Instruments LM4050AIM3X-2.5
- Part No.:
- LM4050AIM3X-2.5
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050AIM3X-2.5.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,455
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4050AIM3X-2.5 from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 2.5 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 60 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 analog front-ends in portable instrumentation.
For engineers reviewing the LM4050AIM3X-2.5 datasheet, LM4050AIM3X-2.5 pinout, LM4050AIM3X-2.5 application, or LM4050AIM3X-2.5 equivalent, key selection considerations include its no-output-capacitor-required operation, capacitive load tolerance, low dynamic impedance (0.3 Ω at 1 mA), long-term stability (120 ppm over 1000 hrs), and AEC-Q100 Grade 1 qualification of the Q1 variant.
Technical Context
The LM4050AIM3X-2.5 uses bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation, enabling stable 2.5 V reference performance across −40°C to +125°C. Its fuse-trimmed wafer-sort process ensures ±0.1% output accuracy at 25°C without post-package calibration.
Unlike series references, it functions as a two-terminal device requiring only an external current-setting resistor; it tolerates unlimited capacitive loads and needs no output capacitor for stability. Dynamic impedance remains ≤0.3 Ω from 100 μA to 15 mA, supporting low-noise, high-PSRR analog signal chains in space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V nominal; ±2.5 mV (±0.1%) tolerance at 25°C ensures high-accuracy ADC/DAC biasing. |
| Temp. Coefficient | ≤50 ppm/°C max over −40°C to +125°C; enables <±11 mV total drift in industrial range. |
| Operating Current | 60 μA min to 15 mA max; supports ultra-low-power sensor nodes and high-current precision DACs. |
| Noise (10 Hz–10 kHz) | 41 μVrms typical; critical for 16-bit+ data acquisition systems requiring clean reference rails. |
| Dynamic Impedance | 0.3 Ω at 1 mA; minimizes load-induced voltage shift in varying-current applications. |
| Long-Term Stability | 120 ppm over 1000 hrs; reduces recalibration frequency in test & measurement equipment. |
| Thermal Hysteresis | 0.7 mV over −40°C ↔ +125°C cycle; maintains repeatability in thermally cycled environments. |
Pinout & Package
SOT-23 (DBZ) package: 3-pin surface-mount, 2.92 mm × 1.30 mm body size, JEDEC MO-178 compatible. Pin 1 = Cathode (shunt current input), Pin 2 = Anode (ground/common), Pin 3 = NC (no internal connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / reference output node | Connects to regulated voltage rail via series resistor; sinks all operating current and load current. |
| Anode (Pin 2) | Ground reference terminal | Must be connected to system ground; defines 0 V reference for output voltage measurement. |
| NC (Pin 3) | No internal connection | Left floating or unconnected; no electrical function - not tied to die or substrate. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct integration into compact PCB layouts without stability-compensation components. |
| Tolerates capacitive loads | Stable with any value of output capacitance - eliminates risk of oscillation in noisy environments. |
| Fuse/Zener-zap voltage trim | Ensures ±0.1% initial accuracy at wafer level, avoiding post-packaging calibration cost. |
| Low quiescent current | 60 μA minimum operating current enables battery life extension in always-on monitoring systems. |
| Wide temperature range support | Qualified for −40°C to +125°C operation, meeting requirements for automotive under-hood and industrial control. |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeters and portable gas analyzers requiring stable, low-power voltage references. IC Role / Device Role / Timing Role: Shunt reference providing precise 2.5 V bias for 16-bit SAR ADCs and op-amp gain stages. Use Value: 41 μVrms noise and 50 ppm/°C TC enable <0.01% measurement accuracy across battery-operated temperature swings. |
Use Scenario: Industrial PLC analog input modules digitizing 4–20 mA sensor signals. IC Role / Device Role / Timing Role: Precision reference for isolated sigma-delta ADCs interfacing with RTD/thermocouple front-ends. Use Value: 0.3 Ω dynamic impedance and 120 ppm long-term stability reduce calibration drift between scheduled maintenance cycles. |
| Energy Management Systems | Automotive Body Control Modules |
Use Scenario: Smart metering units measuring grid voltage/current with Class 0.5 accuracy. IC Role / Device Role / Timing Role: Reference source for metrology-grade ADCs in revenue-grade energy meters. Use Value: ±0.1% initial tolerance and thermal hysteresis of 0.7 mV ensure repeatable readings after thermal cycling in outdoor enclosures. |
Use Scenario: In-vehicle battery monitoring systems tracking 12 V rail health in start-stop vehicles. IC Role / Device Role / Timing Role: Stable 2.5 V reference for microcontroller ADCs sampling battery voltage and temperature sensors. Use Value: Extended −40°C to +125°C rating and AEC-Q100 Grade 1 qualification (via LM4050-N-Q1 family) support under-hood reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C25IDBZR | Same 2.5 V output, but ±0.5% initial tolerance (C grade); higher 100 ppm/°C tempco; 65 μVrms noise. | Lower accuracy and stability - suitable for cost-sensitive consumer-grade sensing, not metrology. | Select when budget constraints outweigh precision requirements and thermal drift can be compensated in firmware. |
| REF3025AIDBZR | Series reference (not shunt); 2.5 V output, ±0.2% tolerance; requires output capacitor; 25 μVrms noise. | Higher PSRR and lower noise, but needs external capacitor and cannot sink load current like a shunt. | Choose for ultra-low-noise applications where board space allows series topology and load is sourced, not sunk. |
Compared with TL4050C25IDBZR, LM4050AIM3X-2.5 delivers 5× tighter initial tolerance and half the temperature drift; versus REF3025AIDBZR, it offers shunt flexibility and capacitor-free operation at the cost of slightly higher noise - making it optimal for space-constrained, load-sinking reference designs.
Availability
LM4050AIM3X-2.5 is available at Aetrix Electronics and suitable for portable instrumentation, data acquisition systems, and energy management applications requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4050AIM3X-2.5 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 automotive-grade component development.
The LM4050-N family was engineered for high-accuracy, low-power shunt reference applications in space-constrained, thermally demanding environments - including portable test gear, industrial sensors, and automotive subsystems.
FAQ
What is the maximum operating current for LM4050AIM3X-2.5?
The LM4050AIM3X-2.5 supports a maximum operating current of 15 mA. This upper limit ensures safe power dissipation within the SOT-23 package's thermal limits while maintaining regulation stability. Exceeding 15 mA risks exceeding the 280 mW absolute maximum power rating at 25°C ambient, potentially degrading long-term reliability or causing thermal shutdown in unventilated layouts.
Does LM4050AIM3X-2.5 require an external capacitor for stability?
No, LM4050AIM3X-2.5 does not require an external output capacitor for stability. Its internal design eliminates the need for stabilization components, and it remains stable with any capacitive load - including large bulk capacitors used in power-supply filtering. This simplifies layout and reduces BOM count in compact designs.
What is the thermal hysteresis specification for LM4050AIM3X-2.5?
The thermal hysteresis of LM4050AIM3X-2.5 is 0.7 mV, measured as the voltage difference at 25°C after cycling between −40°C and +125°C. This low hysteresis ensures repeatable reference performance in systems subject to repeated thermal cycling, such as automotive ECUs or outdoor industrial controllers.
Is LM4050AIM3X-2.5 qualified for automotive applications?
The LM4050AIM3X-2.5 itself is the industrial-grade variant; however, it belongs to the LM4050-N-Q1 family, whose AEC-Q100 Grade 1 qualified versions (e.g., LM4050QAIM3X-2.5) share identical electrical specs and SOT-23 packaging. For automotive use, specify the Q1 suffix to ensure automotive flow compliance and enhanced reliability screening.
How does the minimum operating current of LM4050AIM3X-2.5 vary with temperature?
The LM4050AIM3X-2.5 has a minimum operating current of 60 μA at 25°C, increasing to 65 μA across the full industrial (−40°C to +85°C) and extended (−40°C to +125°C) temperature ranges. This slight increase ensures reliable turn-on and regulation stability under worst-case thermal conditions without requiring derating in design calculations.
LM4050AIM3X-2.5 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):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 41µVrms
- 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
LM4050AIM3X-2.5 FAQ
1.How can I place an order for LM4050AIM3X-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AIM3X-2.5 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-2.5 reliable?
The price and inventory of LM4050AIM3X-2.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050AIM3X-2.5 is usually 5 days.
3.What payment methods are accepted for LM4050AIM3X-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AIM3X-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AIM3X-2.5?
LM4050AIM3X-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AIM3X-2.5 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-2.5?
For technical support, including LM4050AIM3X-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AIM3X-2.5 requirements.
6.How does Aetrix verify that LM4050AIM3X-2.5 is sourced from the original manufacturer or authorized distributors?
All LM4050AIM3X-2.5 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-2.5 meets industry standards.
7.What is the process for return or replacement of LM4050AIM3X-2.5?
All LM4050AIM3X-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AIM3X-2.5, 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-2.5 part is unused and in its original packaging.
Return procedure for LM4050AIM3X-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050AIM3X-2.5 Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
