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Texas Instruments LM4050QAIM3X2.5/NOPB
- Part No.:
- LM4050QAIM3X2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QAIM3X2.5/NOPB.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,634
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Product details
Overview
LM4050QAIM3X2.5/NOPB from Texas Instruments is an AEC-Q100 Grade 1 qualified precision micropower shunt voltage reference in SOT-23 package, delivering a stable 2.5 V 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 automotive, instrumentation, and portable battery-powered systems requiring high accuracy under varying load and temperature.
For engineers reviewing the LM4050QAIM3X2.5/NOPB datasheet, LM4050QAIM3X2.5/NOPB pinout, LM4050QAIM3X2.5/NOPB application, or LM4050QAIM3X2.5/NOPB equivalent, key selection criteria include its automotive qualification, no-output-capacitor-required operation, capacitive-load tolerance, fixed 2.5 V breakdown voltage, and guaranteed stability across −40°C to 125°C.
Technical Context
The LM4050QAIM3X2.5/NOPB uses bandgap-based Zener-zap trimmed shunt regulation with curvature-corrected temperature drift compensation, enabling ±0.1% accuracy at 25°C and ≤50 ppm/°C max TC over −40°C to 125°C. Its low dynamic impedance (0.3 Ω typical at 1 mA) and absence of minimum output capacitance requirement simplify layout in space-constrained designs.
It functions as a two-terminal shunt reference: cathode accepts input current and sets regulated voltage relative to anode (ground), with NC pin unconnected. The device tolerates any capacitive load without oscillation and maintains stability across its full 60 μA–15 mA operating current range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V nominal; enables precise ADC/DAC biasing and sensor excitation at standard rail-compatible level |
| Initial Tolerance (A grade) | ±0.1% at 25°C; reduces calibration burden in production test and high-accuracy measurement systems |
| Temp Coefficient | ≤50 ppm/°C max over −40°C to 125°C; ensures <±11 mV drift across full automotive temperature range |
| Operating Current Range | 60 μA to 15 mA; supports ultra-low-power sleep modes and high-current precision references in same design |
| Output Noise (10 Hz–10 kHz) | 41 μVrms typical; minimizes added uncertainty in 16-bit+ data acquisition front-ends |
| Dynamic Impedance | 0.3 Ω typical at 1 mA; maintains tight regulation despite rapid load transients in mixed-signal systems |
| Long-Term Stability | 120 ppm after 1000 hrs; ensures consistent performance over product lifetime without recalibration |
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 regulation node | Connects to supply via series resistor; regulates voltage between cathode and anode by sinking excess current |
| Anode (Pin 2) | Reference ground return | Must be connected to system ground; defines 0 V reference for 2.5 V output at cathode |
| NC (Pin 3) | No internal connection | Left floating per datasheet; no PCB trace or thermal pad required; avoids unintended coupling |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive applications with operation up to +125°C junction temperature and robust ESD immunity (±2000 V HBM) |
| No output capacitor required | Eliminates external stabilization capacitor, reducing BOM count and board area in compact modules |
| Capacitive load tolerance | Stable with any value of output capacitance - simplifies filtering and bypassing without risk of oscillation |
| Fixed 2.5 V reverse breakdown | Matches common SAR ADC reference inputs and microcontroller VREF pins without scaling resistors |
| Low quiescent current | 60 μA minimum operating current enables use in always-on battery monitoring and wake-up circuits |
Applications
| Portable Battery-Powered Equipment | Data Acquisition Systems |
|---|---|
Use Scenario: Precision voltage reference for fuel gauges and battery health monitors in handheld medical devices and wearables. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.5 V for ADC conversion of cell voltage and temperature sensors. Use Value: Enables <±0.1% SOC estimation accuracy over full temperature and discharge cycle without recalibration. |
Use Scenario: High-resolution analog front-end in portable oscilloscopes and multimeters. IC Role / Device Role / Timing Role: Primary reference for 16-bit successive-approximation ADCs sampling at up to 1 MSPS. Use Value: 41 μVrms noise and 0.3 Ω dynamic impedance preserve ENOB >15.2 bits across operating current range. |
| Automotive Sensor Modules | Precision Audio Components |
Use Scenario: Reference for pressure and position sensors in engine control units and ADAS subsystems. IC Role / Device Role / Timing Role: AEC-Q100 Grade 1 shunt reference supplying 2.5 V to signal-conditioning amplifiers and CAN transceiver bias networks. Use Value: Guaranteed ±0.1% tolerance and ≤50 ppm/°C TC ensure sensor linearity compliance across −40°C to +125°C ambient. |
Use Scenario: DC bias reference for Class-D amplifier feedback networks and DAC output buffers in premium audio receivers. IC Role / Device Role / Timing Role: Low-noise 2.5 V reference stabilizing gain-setting and offset-nulling circuitry in analog signal paths. Use Value: Thermal hysteresis of only 0.7 mV prevents audible "popping" during power cycling and ambient temperature shifts. |
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 and SOT-23 package, but industrial-grade (−40°C to 85°C), ±0.5% initial tolerance (C grade), higher 100 μA min current | Not qualified for automotive; suitable for cost-sensitive industrial DAQ where tighter TC not required | Select when AEC-Q100 qualification and <±0.1% tolerance are unnecessary and lower unit cost is prioritized |
| MAX6002EUR+T | 2.5 V shunt reference in SOT-23, ±0.2% initial tolerance, 75 ppm/°C max TC, 65 μA min current, no automotive qualification | Lacks AEC-Q100 Grade 1 rating; higher TC limits use in extended-temp automotive zones | Choose for space-constrained consumer electronics needing better accuracy than TL4050 but no automotive validation |
Compared with TL4050C25IDBZR and MAX6002EUR+T, the LM4050QAIM3X2.5/NOPB uniquely delivers AEC-Q100 Grade 1 compliance, ±0.1% initial accuracy, and 50 ppm/°C max TC in the same SOT-23 footprint - making it the only drop-in solution for safety-critical automotive voltage referencing where long-term stability and temperature robustness are non-negotiable.
Availability
LM4050QAIM3X2.5/NOPB is available at Aetrix Electronics and suitable for automotive sensor modules, portable battery-powered equipment, precision data acquisition systems, and industrial instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4050QAIM3X2.5/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 automotive-grade component development.
The LM4050-N/-Q1 product line was engineered specifically for high-accuracy, low-power shunt voltage referencing in space-constrained and thermally demanding environments - including automotive ECUs, portable medical devices, and industrial process controllers.
FAQ
What is the maximum operating current for LM4050QAIM3X2.5/NOPB?
The LM4050QAIM3X2.5/NOPB supports a maximum operating current of 15 mA, as specified in the Absolute Maximum Ratings table. This allows the device to maintain stable 2.5 V regulation while sinking substantial current in high-precision reference buffer or active filter applications. Exceeding 15 mA risks permanent damage per TI's datasheet guidelines.
Does LM4050QAIM3X2.5/NOPB require an external output capacitor?
No, the LM4050QAIM3X2.5/NOPB does not require an external output capacitor for stability. Its internal design eliminates the need for stabilization capacitance while remaining tolerant of any capacitive load - a key advantage over older shunt references that demand strict COUT values to prevent oscillation.
What is the temperature range supported by LM4050QAIM3X2.5/NOPB?
The LM4050QAIM3X2.5/NOPB is rated for operation from −40°C to +125°C ambient temperature, meeting AEC-Q100 Grade 1 requirements. This extended range is validated across all electrical characteristics, including ±0.1% initial tolerance and ≤50 ppm/°C temperature coefficient, ensuring reliability in under-hood automotive and industrial edge computing environments.
How does LM4050QAIM3X2.5/NOPB achieve low output noise?
The LM4050QAIM3X2.5/NOPB achieves 41 μVrms wideband noise (10 Hz–10 kHz) through proprietary bandgap architecture with curvature correction and optimized die-level filtering. This low-noise performance is measured at 100 μA operating current and directly enables high-resolution data conversion without additional post-regulation filtering.
Is LM4050QAIM3X2.5/NOPB pin-compatible with other LM4050 variants?
Yes, LM4050QAIM3X2.5/NOPB shares identical SOT-23 (DBZ) pinout and terminal functions with all LM4050-N and LM4050-N-Q1 variants - Cathode (Pin 1), Anode (Pin 2), and NC (Pin 3). However, voltage options (2.048 V, 4.096 V, etc.) and grades (A/B/C) are not interchangeable without circuit redesign due to differing breakdown voltages and tolerances.
LM4050QAIM3X2.5/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:
- 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 ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050QAIM3X2.5/NOPB FAQ
1.How can I place an order for LM4050QAIM3X2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QAIM3X2.5/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 LM4050QAIM3X2.5/NOPB reliable?
The price and inventory of LM4050QAIM3X2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QAIM3X2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QAIM3X2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QAIM3X2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QAIM3X2.5/NOPB?
LM4050QAIM3X2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QAIM3X2.5/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 LM4050QAIM3X2.5/NOPB?
For technical support, including LM4050QAIM3X2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QAIM3X2.5/NOPB requirements.
6.How does Aetrix verify that LM4050QAIM3X2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QAIM3X2.5/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 LM4050QAIM3X2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QAIM3X2.5/NOPB?
All LM4050QAIM3X2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QAIM3X2.5/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 LM4050QAIM3X2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4050QAIM3X2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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