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Texas Instruments LM4050QAIM3-2.5/NOPB
- Part No.:
- LM4050QAIM3-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QAIM3-2.5/NOPB.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,849
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Product details
Overview
LM4050QAIM3-2.5/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering 2.500 V ±2.5 mV (A-grade, 25°C), 41 μVrms wideband noise (10 Hz–10 kHz), and ±50 ppm/°C max temperature coefficient across −40°C to 125°C. It operates from 60 μA to 15 mA cathode current and requires no output capacitor-used in ADC reference, battery-powered instrumentation, and automotive sensor signal conditioning.
For engineers reviewing the LM4050QAIM3-2.5/NOPB datasheet, LM4050QAIM3-2.5/NOPB pinout, LM4050QAIM3-2.5/NOPB application, or LM4050QAIM3-2.5/NOPB equivalent, key selection criteria include initial accuracy at 25°C, thermal hysteresis (0.7 mV), dynamic impedance (0.3 Ω), long-term stability (120 ppm), and AEC-Q100 Grade 1 qualification for automotive use.
Technical Context
The LM4050QAIM3-2.5/NOPB implements a curvature-corrected bandgap architecture with Zener-zap trim for ±0.1% initial accuracy. Its internal compensation enables stable operation with any capacitive load without external bypass capacitance.
As a two-terminal shunt device, it regulates voltage between cathode and anode via controlled reverse breakdown current; minimum operating current is 60 μA (25°C), rising to 65 μA over full temperature range, while maximum cathode current remains 15 mA regardless of ambient conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V nominal; ±2.5 mV max tolerance at 25°C ensures 12-bit ADC full-scale accuracy without trimming. |
| Initial Accuracy | ±0.1% (A grade) at 25°C - verified by fuse/Zener-zap wafer-level trim for production consistency. |
| Temp Coefficient | ±50 ppm/°C max over −40°C to 125°C - enables stable reference in engine control units and industrial meters. |
| Noise (10Hz–10kHz) | 41 μVrms typical - low enough for 16-bit SAR ADCs without additional filtering. |
| Dynamic Impedance | 0.3 Ω at 1 mA, 120 Hz - minimizes load-induced voltage shift in varying-current applications. |
| Operating Current | 60 μA to 15 mA - supports ultra-low-power sensor nodes and high-current precision DAC buffers. |
| Thermal Hysteresis | 0.7 mV over −40°C ↔ 125°C cycle - critical for repeatable calibration in field-deployed test equipment. |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, 3-pin surface-mount configuration with exposed die attach pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / reference output node | Carries total cathode current (IQ + IL); voltage regulation occurs between this pin and Anode. |
| Anode (Pin 2) | Reference ground / common return | Must be connected to system ground; serves as voltage reference baseline for all measurements. |
| NC (Pin 3) | No internal connection | Electrically isolated; leave floating or tie to Pin 2 only in high-EMI environments per TI layout guidance. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Internally compensated for stability with any capacitive load - eliminates BOM cost and layout area for bypass cap. |
| AEC-Q100 Grade 1 qualified | Validated for automotive applications operating from −40°C to 125°C ambient - meets functional safety readiness for ADAS sensors. |
| Low micropower operation | 60 μA minimum cathode current enables >10-year battery life in wireless sensor transmitters. |
| Fixed 2.5 V output | Eliminates external resistor divider - reduces component count and drift sources in portable medical devices. |
| Low thermal hysteresis | 0.7 mV shift after −40°C/125°C cycling - preserves calibration integrity in field-serviceable test gear. |
Applications
| Battery-Powered Instrumentation | Automotive Sensor Signal Conditioning |
|---|---|
Use Scenario: Portable multimeter with 16-bit ADC and coin-cell power supply. IC Role / Device Role / Timing Role: Precision 2.5 V shunt reference for ADC full-scale calibration and offset nulling. Use Value: Enables ±0.005% measurement accuracy over temperature without recalibration, extending field calibration intervals to 2 years. | Use Scenario: Engine coolant temperature sensor interface in powertrain ECU. IC Role / Device Role / Timing Role: Stable 2.5 V reference for ratiometric RTD-to-digital conversion under wide ambient swings. Use Value: Maintains <±1°C temperature reading accuracy across −40°C to 125°C ambient, meeting ISO 26262 ASIL-B requirements. |
| Data Acquisition Front-End | Precision Audio Level Detection |
Use Scenario: Industrial PLC analog input module with 24-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Low-noise 2.5 V reference for ADC reference input and PGA gain-setting network. Use Value: 41 μVrms noise contributes <0.1 LSB error in 24-bit conversion, eliminating need for external low-noise op-amp buffer. | Use Scenario: Studio-grade audio compressor with RMS level detection circuitry. IC Role / Device Role / Timing Role: Stable 2.5 V threshold reference for logarithmic envelope follower and gain-control comparators. Use Value: ±50 ppm/°C tempco prevents audible "drift" in compression ratio during studio session warm-up (20°C → 35°C). |
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 | 2.5 V, ±0.2% initial accuracy, 50 μVrms noise, 50 ppm/°C max tempco, SOT-23, but not AEC-Q100 qualified | Industrial-only use; lacks automotive qualification and tighter 0.1% tolerance | Select when AEC-Q100 compliance is unnecessary and ±0.2% accuracy suffices. |
| ADR3425ARJZ-R7 | 2.5 V, ±0.1% initial accuracy, 40 μVrms noise, 30 ppm/°C max tempco, SOT-23, but not automotive qualified | Higher precision and lower tempco, yet no AEC-Q100 Grade 1 rating or extended temperature support | Choose for lab-grade instrumentation where 30 ppm/°C stability outweighs automotive qualification needs. |
Compared with REF3025AIDBZR and ADR3425ARJZ-R7, LM4050QAIM3-2.5/NOPB uniquely combines AEC-Q100 Grade 1 qualification, 0.1% initial accuracy, and guaranteed 125°C operation - making it the only drop-in solution for automotive Tier-1 modules requiring both precision and functional safety alignment.
Availability
LM4050QAIM3-2.5/NOPB is available at Aetrix Electronics and suitable for automotive electronics, precision data acquisition systems, and battery-powered instrumentation requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LM4050QAIM3-2.5/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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and automotive electronics.
The LM4050-N/Q1 product line delivers micropower shunt voltage references optimized for space-constrained, high-reliability applications including automotive sensors, portable test equipment, and industrial process controllers.
FAQ
What is the maximum operating temperature range for LM4050QAIM3-2.5/NOPB?
The LM4050QAIM3-2.5/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 specifications, including ±50 ppm/°C max temperature coefficient and 0.7 mV thermal hysteresis, ensuring reliability in under-hood automotive environments and industrial edge nodes.
Does LM4050QAIM3-2.5/NOPB require an external output capacitor?
No, LM4050QAIM3-2.5/NOPB does not require an external output capacitor due to internal compensation. It remains stable with any capacitive load, including ADC input capacitance or PCB trace capacitance. Adding a bypass capacitor is optional and does not affect regulation stability - a key advantage over older shunt references like TL431.
What is the minimum cathode current needed for regulation in LM4050QAIM3-2.5/NOPB?
The LM4050QAIM3-2.5/NOPB requires a minimum cathode current of 60 μA at 25°C and 65 μA across the full −40°C to +125°C range to maintain regulation within specified voltage tolerance. This low current enables micropower designs such as energy-harvesting sensor nodes and always-on monitoring circuits.
How does LM4050QAIM3-2.5/NOPB achieve ±0.1% initial accuracy?
LM4050QAIM3-2.5/NOPB achieves ±0.1% initial accuracy via wafer-level Zener-zap and fuse trimming during manufacturing test. This process adjusts the reverse breakdown voltage post-fabrication, ensuring every LM4050QAIM3-2.5/NOPB unit meets the A-grade tolerance specification at 25°C before shipment - no system-level calibration required.
Is LM4050QAIM3-2.5/NOPB pin-compatible with other LM4050 variants?
Yes, LM4050QAIM3-2.5/NOPB shares identical SOT-23 (DBZ) pinout and footprint with all LM4050-N and LM4050-N-Q1 variants, including LM4050AIM3-2.5, LM4050BIM3-2.5, and LM4050QAIM3-4.1. Pin 1 = Cathode, Pin 2 = Anode, Pin 3 = NC - enabling direct substitution within same voltage grade and package.
LM4050QAIM3-2.5/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:
- Active
- 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
LM4050QAIM3-2.5/NOPB FAQ
1.How can I place an order for LM4050QAIM3-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QAIM3-2.5/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 LM4050QAIM3-2.5/NOPB reliable?
The price and inventory of LM4050QAIM3-2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QAIM3-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QAIM3-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QAIM3-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QAIM3-2.5/NOPB?
LM4050QAIM3-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QAIM3-2.5/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 LM4050QAIM3-2.5/NOPB?
For technical support, including LM4050QAIM3-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QAIM3-2.5/NOPB requirements.
6.How does Aetrix verify that LM4050QAIM3-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QAIM3-2.5/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 LM4050QAIM3-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QAIM3-2.5/NOPB?
All LM4050QAIM3-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QAIM3-2.5/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 LM4050QAIM3-2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4050QAIM3-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050QAIM3-2.5/NOPB Tags
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