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Texas Instruments LM4050QAEM3X2.5/NOPB
- Part No.:
- LM4050QAEM3X2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QAEM3X2.5/NOPB.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,422
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Product details
Overview
LM4050QAEM3X2.5/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) reverse breakdown voltage with 41 μVrms wideband noise (10 Hz–10 kHz), 50 ppm/°C max temperature coefficient, and stable operation from 60 μA to 15 mA over −40°C to 125°C. It serves as a compact, capacitor-free reference for high-resolution ADCs, battery-powered instrumentation, and automotive sensor signal conditioning.
For engineers reviewing the LM4050QAEM3X2.5/NOPB datasheet, LM4050QAEM3X2.5/NOPB pinout, LM4050QAEM3X2.5/NOPB application, or LM4050QAEM3X2.5/NOPB equivalent, key selection criteria include initial voltage tolerance 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 LM4050QAEM3X2.5/NOPB implements a curvature-corrected bandgap shunt reference architecture with Zener-zap and fuse trimming for ±0.1% initial accuracy. Its internal compensation eliminates need for output capacitance while maintaining stability under capacitive loads up to 10 nF.
It operates as a two-terminal device: cathode regulates voltage against anode (ground), requiring external series resistor (RS) to set operating current between 60 μA (min) and 15 mA (max). Thermal hysteresis of 0.7 mV and 50 ppm/°C max drift ensure repeatable performance across −40°C to 125°C cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V ±2.5 mV at 25°C (A-grade); enables 1 mV LSB matching for 12-bit systems with 5 V supply |
| Tempco (Max) | 50 ppm/°C over −40°C to 125°C; limits full-range error to ±12.288 mV for precision metrology |
| Noise (10 Hz–10 kHz) | 41 μVrms; supports <16-bit ENOB in low-noise data acquisition without external filtering |
| Dynamic Impedance | 0.3 Ω at 1 mA / 120 Hz; ensures minimal load regulation error (<0.8 mV) across 1 mA current swing |
| Operating Current Range | 60 μA to 15 mA; allows ultra-low-power sleep modes and high-current transient support in same design |
| Thermal Hysteresis | 0.7 mV after −40°C ↔ 125°C cycling; critical for repeatability in field-deployed energy metering |
| AEC-Q100 Grade | Grade 1 (−40°C to 125°C); qualified for engine control, ADAS sensors, and powertrain subsystems |
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 connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / regulated voltage node | Connects to series resistor (RS) and load; voltage referenced to Anode; carries total current (IQ + IL) |
| Anode (Pin 2) | Ground reference / common return | Must be connected to system ground; serves as voltage reference point for cathode output |
| NC (Pin 3) | No internal connection | Leave floating or tie to Pin 2 only in high-EMI environments; no electrical function in standard operation |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Internally compensated for stability with any capacitive load ≤10 nF - reduces BOM count and layout area |
| Fixed 2.5 V output | Eliminates feedback resistor network; simplifies layout and avoids resistor tolerance/TC errors in 5 V systems |
| AEC-Q100 Grade 1 qualification | Validated for automotive applications requiring −40°C to 125°C operation and robust reliability testing |
| Low 41 μVrms noise | Enables direct interface to 16-bit SAR ADCs without additional low-noise buffering or filtering stages |
| 60 μA minimum operating current | Supports battery life extension in always-on sensor nodes (e.g., tire pressure monitors, remote IoT sensors) |
Applications
| Battery-Powered Instrumentation | Automotive Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Portable multimeter with 16-bit ADC and lithium coin-cell supply. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 2.5 V reference for ADC full-scale calibration. Use Value: 41 μVrms noise and 50 ppm/°C tempco enable ±0.01% measurement accuracy across 0–40°C ambient range without recalibration. |
Use Scenario: Engine coolant temperature sensor module in powertrain ECU. IC Role / Device Role / Timing Role: Precision reference for ratiometric RTD-to-digital conversion circuitry. Use Value: AEC-Q100 Grade 1 rating and 0.7 mV thermal hysteresis ensure repeatable sensor readings after thermal cycling during vehicle cold-start/warm-up cycles. |
| Industrial Energy Metering | Medical-Grade Data Acquisition |
|
Use Scenario: DIN-rail mounted kWh meter with isolated 24-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Primary reference for analog front-end gain/offset calibration and ADC reference rail. Use Value: 120 ppm long-term stability (1000 hrs) and ±2.5 mV initial tolerance meet IEC 62053-21 Class 0.2 accuracy requirements over 15-year product lifetime. |
Use Scenario: Portable ECG monitor with ultra-low-power microcontroller and 20-bit ADC. IC Role / Device Role / Timing Role: Low-noise, micropower reference for analog signal chain powering patient isolation amplifiers. Use Value: 60 μA min operating current extends single-charge battery life beyond 72 hours; 41 μVrms noise preserves diagnostic SNR in sub-μV biopotential signals. |
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 ppm/°C max, 50 μVrms noise, SOT-23, but requires 1 μF output capacitor for stability | Higher noise and mandatory capacitor reduce suitability for space-constrained, capacitor-free designs | Prefer LM4050QAEM3X2.5/NOPB where board area is limited and capacitor elimination is critical |
| ADR3425ARJZ-R7 | 2.5 V, ±0.1% initial accuracy, 30 ppm/°C max, 35 μVrms noise, but only rated for −40°C to +125°C industrial grade (not AEC-Q100) | Lacks automotive qualification and has higher minimum current (100 μA) limiting ultra-low-power use | Choose LM4050QAEM3X2.5/NOPB for automotive deployments or when <60 μA operation is required |
Compared with REF3025AIDBZR and ADR3425ARJZ-R7, the LM4050QAEM3X2.5/NOPB uniquely combines AEC-Q100 Grade 1 qualification, capacitor-free operation, and 60 μA minimum current - making it the only option qualified for automotive shunt references needing both space efficiency and extended temperature reliability.
Availability
LM4050QAEM3X2.5/NOPB is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive sensor signal conditioning, industrial energy metering, medical-grade data acquisition, and precision analog front-end designs requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4050QAEM3X2.5/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, embedded processing, and connectivity technologies, with decades of leadership in precision analog ICs and automotive-qualified components.
The LM4050-N series was designed specifically for space-constrained, high-accuracy shunt reference applications demanding micropower operation, low noise, and automotive-grade reliability - targeting instrumentation, energy metering, and safety-critical vehicle subsystems.
FAQ
What is the maximum operating current for LM4050QAEM3X2.5/NOPB?
The LM4050QAEM3X2.5/NOPB supports a maximum operating current of 15 mA. Exceeding this value risks exceeding the device's 280 mW power dissipation limit at 25°C ambient and may cause thermal shutdown or permanent damage. Derating is required above 25°C using RθJA = 287°C/W.
Does LM4050QAEM3X2.5/NOPB require an external output capacitor?
No, the LM4050QAEM3X2.5/NOPB is internally compensated and does not require an external output capacitor for stability. It remains stable with any capacitive load up to 10 nF, enabling capacitor-free designs that reduce PCB area and BOM cost - a key differentiator versus alternatives like REF3025AIDBZR.
Is LM4050QAEM3X2.5/NOPB qualified for automotive applications?
Yes, LM4050QAEM3X2.5/NOPB is AEC-Q100 Grade 1 qualified (−40°C to +125°C), manufactured on an automotive-grade flow, and specified for use in engine control units, ADAS sensors, and other safety-critical vehicle subsystems requiring validated reliability and thermal robustness.
What is the thermal hysteresis specification for LM4050QAEM3X2.5/NOPB?
The LM4050QAEM3X2.5/NOPB exhibits 0.7 mV thermal hysteresis - defined as the voltage shift measured at 25°C after cycling between −40°C and +125°C. This parameter directly impacts repeatability in field-deployed equipment such as smart meters and automotive sensors subject to repeated thermal stress.
How does LM4050QAEM3X2.5/NOPB achieve ±0.1% initial accuracy?
The LM4050QAEM3X2.5/NOPB achieves ±0.1% initial accuracy (A-grade) via wafer-level fuse and Zener-zap trimming during sort, combined with curvature-corrected bandgap design. This process ensures the 2.500 V nominal output falls within ±2.5 mV at 25°C before packaging and final test.
LM4050QAEM3X2.5/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
LM4050QAEM3X2.5/NOPB FAQ
1.How can I place an order for LM4050QAEM3X2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QAEM3X2.5/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 LM4050QAEM3X2.5/NOPB reliable?
The price and inventory of LM4050QAEM3X2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QAEM3X2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QAEM3X2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QAEM3X2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QAEM3X2.5/NOPB?
LM4050QAEM3X2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QAEM3X2.5/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 LM4050QAEM3X2.5/NOPB?
For technical support, including LM4050QAEM3X2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QAEM3X2.5/NOPB requirements.
6.How does Aetrix verify that LM4050QAEM3X2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QAEM3X2.5/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 LM4050QAEM3X2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QAEM3X2.5/NOPB?
All LM4050QAEM3X2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QAEM3X2.5/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 LM4050QAEM3X2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4050QAEM3X2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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