My Inquiry
My Account
Texas Instruments LM4050AIM3-2.5
- Part No.:
- LM4050AIM3-2.5
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050AIM3-2.5.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,289
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4050AIM3-2.5 from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 2.500 V ±2.5 mV (A-grade, 25°C) reverse breakdown voltage with 50 ppm/°C max temperature coefficient, 41 μVrms wideband noise (10 Hz–10 kHz), and operation from 60 μA to 15 mA. It enables high-accuracy analog signal conditioning in portable data acquisition systems.
For engineers reviewing the LM4050AIM3-2.5 datasheet, LM4050AIM3-2.5 pinout, LM4050AIM3-2.5 application, or LM4050AIM3-2.5 equivalent, key selection criteria include initial voltage tolerance (±0.1%), low-noise performance, capacitive-load stability without external capacitor, industrial/extended temperature range support, and SOT-23 footprint compatibility for space-constrained PCBs.
Technical Context
The LM4050AIM3-2.5 uses bandgap reference architecture with curvature-corrected temperature drift compensation and Zener-zap trim at wafer sort to achieve ±0.1% initial accuracy. Its shunt topology requires an external current-setting resistor but eliminates need for output capacitor while tolerating any capacitive load.
It operates as a two-terminal device with cathode and anode terminals only-pin 3 is NC-and maintains stable regulation across −40°C to +125°C with dynamic impedance of 0.3 Ω at 1 mA. Long-term stability is 120 ppm over 1000 hours at 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V ±2.5 mV at 100 μA, 25°C - defines precise reference level for ADC/DAC biasing and sensor excitation |
| Initial Tolerance | ±0.1% (A grade) - ensures single-point calibration suffices in production test |
| Temp Coefficient | 50 ppm/°C max (−40°C to +125°C) - limits drift to ±13 mV over full range, critical for precision instrumentation |
| Noise (10 Hz–10 kHz) | 41 μVrms typical - supports <16-bit ENOB in high-resolution data converters |
| Operating Current | 60 μA min to 15 mA max - enables ultra-low-power battery operation and robust load regulation |
| 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 deployed field equipment |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, 3-pin surface-mount configuration with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage reference node | Connects to regulated voltage rail; sinks all operating current plus load current |
| Anode (Pin 2) | Reference ground return | Must be tied to system ground; forms reference potential for cathode voltage |
| NC (Pin 3) | No internal connection | Must remain unconnected or floating; no routing or soldering required |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct integration into compact layouts without stability-compensation components |
| Tolerates capacitive loads | Supports direct connection to ADC input caps, op-amp feedback networks, and filtering stages |
| Fixed 2.5 V reverse breakdown | Matches standard DAC/ADC reference inputs and eliminates trimming resistors |
| Industrial & extended temp ranges | Validated operation from −40°C to +125°C meets automotive and industrial environmental requirements |
| Low 41 μVrms noise | Preserves signal integrity in high-gain sensor front-ends and precision measurement chains |
Applications
| Portable Data Acquisition | Process Control Transmitters |
|---|---|
Use Scenario: Battery-powered handheld multimeter acquiring 16-bit voltage readings in field environments. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise 2.5 V full-scale for SAR ADC conversion. Use Value: Enables ±0.1% absolute accuracy without factory recalibration, extending battery life via 60 μA minimum operating current. | Use Scenario: 4–20 mA loop-powered pressure transmitter operating in chemical plant ambient conditions. IC Role / Device Role / Timing Role: Stable 2.5 V reference for bridge sensor excitation and analog front-end gain setting. Use Value: Maintains <±13 mV total drift over −40°C to +85°C, ensuring consistent 0.1% FS measurement repeatability. |
| Precision Audio DAC Reference | Automotive Body Control Module |
Use Scenario: High-fidelity audio DAC in automotive infotainment requiring low-noise analog supply. IC Role / Device Role / Timing Role: Low-noise 2.5 V reference for DAC internal voltage scaling and analog output stage biasing. Use Value: 41 μVrms noise contributes <−107 dB THD+N floor, preserving dynamic range in 24-bit audio paths. | Use Scenario: Microcontroller-based BCM monitoring door lock status, window position, and lighting loads. IC Role / Device Role / Timing Role: Reference for on-chip ADC measuring battery voltage and sensor signals under wide thermal cycling. Use Value: AEC-Q100 Grade 1 qualification and 120 ppm long-term stability ensure reliable BOM lifetime compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3025AIDBZR | Series topology; requires input voltage ≥2.7 V; 50 ppm/°C tempco; 25 μVrms noise | Needs higher supply headroom; lower noise but less flexible current sourcing | Prefer when supply >2.7 V available and lowest noise is priority over layout simplicity |
| TL431CDBZR | Adjustable 2.5 V reference; ±2% initial tolerance; 100 ppm/°C tempco; 20 μVrms noise | Requires two external resistors; wider tolerance demands calibration; higher drift | Choose for cost-sensitive designs where ±2% accuracy and manual trim are acceptable |
Compared with REF3025AIDBZR and TL431CDBZR, the LM4050AIM3-2.5 offers superior initial accuracy (±0.1% vs ±2%) and shunt simplicity (no external resistors or capacitor), making it optimal for space-constrained, battery-operated, or fixed-voltage precision applications where supply headroom is limited.
Availability
LM4050AIM3-2.5 is available at Aetrix Electronics and suitable for portable instrumentation, industrial process transmitters, precision audio subsystems, and automotive body control modules requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LM4050AIM3-2.5 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, embedded processing, and power management technologies, with decades of leadership in precision reference design.
The LM4050-N series was engineered specifically for space-constrained, micropower, high-accuracy shunt reference applications-including portable test equipment, sensor signal chains, and automotive subsystems-where stability, low noise, and zero-output-capacitor operation are mandatory.
FAQ
What is the minimum operating current for LM4050AIM3-2.5?
The LM4050AIM3-2.5 requires a minimum operating current of 60 μA at 25°C, increasing to 65 μA across the full industrial temperature range (−40°C to +85°C). This low quiescent current enables multi-year battery life in portable devices while maintaining ±0.1% output voltage accuracy and 50 ppm/°C temperature coefficient performance.
Does LM4050AIM3-2.5 require an external output capacitor?
No, the LM4050AIM3-2.5 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 feedback networks. This eliminates board space, BOM cost, and layout sensitivity associated with capacitor selection and placement-confirmed in TI's SNOS455G datasheet Section 1.
What is the maximum junction temperature rating for LM4050AIM3-2.5?
The LM4050AIM3-2.5 has a maximum junction temperature rating of 150°C, with recommended operating junction temperature up to 125°C for extended reliability. Thermal derating follows PDmax = (150°C − TA) / 287°C/W (RθJA for SOT-23), limiting power dissipation to ~280 mW at 25°C ambient and decreasing linearly at higher temperatures.
Is LM4050AIM3-2.5 qualified for automotive applications?
The LM4050AIM3-2.5 is not AEC-Q100 qualified; however, the pin-compatible LM4050QAIM3-2.5 (Q1 variant) is AEC-Q100 Grade 1 qualified for automotive use. Both share identical electrical specifications, but only the Q1 version undergoes automotive-specific stress testing and traceability protocols required for body control, infotainment, and ADAS subsystems.
How does thermal hysteresis affect LM4050AIM3-2.5 performance?
LM4050AIM3-2.5 exhibits 0.7 mV thermal hysteresis-the voltage difference measured at 25°C after cycling between −40°C and +125°C. This represents a worst-case 280 ppm deviation relative to 2.5 V, which remains within specification for most precision applications and is significantly lower than alternatives like TL431 (typically >2 mV).
LM4050AIM3-2.5 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
LM4050AIM3-2.5 FAQ
1.How can I place an order for LM4050AIM3-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AIM3-2.5 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 LM4050AIM3-2.5 reliable?
The price and inventory of LM4050AIM3-2.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050AIM3-2.5 is usually 5 days.
3.What payment methods are accepted for LM4050AIM3-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AIM3-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AIM3-2.5?
LM4050AIM3-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AIM3-2.5 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 LM4050AIM3-2.5?
For technical support, including LM4050AIM3-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AIM3-2.5 requirements.
6.How does Aetrix verify that LM4050AIM3-2.5 is sourced from the original manufacturer or authorized distributors?
All LM4050AIM3-2.5 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 LM4050AIM3-2.5 meets industry standards.
7.What is the process for return or replacement of LM4050AIM3-2.5?
All LM4050AIM3-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AIM3-2.5, 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 LM4050AIM3-2.5 part is unused and in its original packaging.
Return procedure for LM4050AIM3-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050AIM3-2.5 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…
