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Texas Instruments LM4050QAEM3X2.0/NOPB
- Part No.:
- LM4050QAEM3X2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QAEM3X2.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,690
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Product details
Overview
LM4050QAEM3X2.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering 2.048 V ±0.1% (A-grade) output at 25°C, with 50 ppm/°C max temperature coefficient, 41 μVrms wideband noise (10 Hz–10 kHz), and stable operation from 60 μA to 15 mA load current. It enables high-accuracy ADC/DAC biasing in space-constrained battery-powered instrumentation.
For engineers reviewing the LM4050QAEM3X2.0/NOPB datasheet, LM4050QAEM3X2.0/NOPB pinout, LM4050QAEM3X2.0/NOPB application, or LM4050QAEM3X2.0/NOPB equivalent, key selection criteria include initial voltage tolerance, 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 LM4050QAEM3X2.0/NOPB implements a curvature-corrected bandgap shunt architecture with Zener-zap trim for ±0.1% initial accuracy. It operates as a two-terminal device-cathode and anode-with no internal feedback resistors, requiring only an external series resistor (RS) to set operating current.
Its stability is internally compensated: no output capacitor required, yet tolerant of capacitive loads up to 10 nF. The device maintains regulation across −40°C to 125°C (extended temp range), with thermal hysteresis of 0.7 mV and reverse dynamic impedance of 0.3 Ω at 1 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal; enables exact 1 mV LSB for 11-bit systems with 2 V full-scale |
| Initial Tolerance | ±0.1% at 25°C (A-grade); supports high-accuracy calibration without trimming |
| Temp Coefficient | ≤50 ppm/°C over −40°C to 125°C; ensures < ±0.102 mV drift across full range |
| Operating Current | 60 μA min / 15 mA max; allows ultra-low-power sensor nodes and robust industrial loads |
| Output Noise | 41 μVrms (10 Hz–10 kHz); preserves SNR in 12-bit+ data acquisition |
| Dynamic Impedance | 0.3 Ω at 1 mA; minimizes load-induced voltage shift in varying-current applications |
| Long-Term Stability | 120 ppm after 1000 hrs; reduces recalibration frequency in metering and test equipment |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, surface-mount, 3-pin configuration with exposed die attach pad not connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / reference output node | Carries total current (IQ + IL); voltage regulated between this and anode |
| Anode (Pin 2) | Reference ground / common return | Must be connected to system ground; serves as voltage reference reference point |
| NC (Pin 3) | No internal connection | Must be left floating or tied to Pin 2 per TI EMI guidance; not usable as signal or bypass path |
Key Features
| Feature | Design Value |
|---|---|
| Zero-output-capacitor stability | Internally compensated for unconditional stability-eliminates BOM item and layout risk |
| Capacitive load tolerance | Stable with ≥10 nF load capacitance; simplifies filtering in noisy environments |
| AEC-Q100 Grade 1 qualified | Validated for automotive ambient temperatures (−40°C to 125°C) and reliability stress tests |
| Low micropower operation | 60 μA minimum cathode current enables >10-year battery life in 10 μA sleep-mode systems |
| Fixed 2.048 V option | Matches binary-scaled full-scale ranges (e.g., 211 = 2048); avoids gain error in digital systems |
Applications
| Battery-Powered Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Portable multimeter with 12-bit SAR ADC powered by coin cell. IC Role / Device Role / Timing Role: Precision 2.048 V shunt reference for ADC VREF, directly setting full-scale range. Use Value: Enables 1 mV resolution without trimming; 41 μVrms noise preserves effective number of bits (ENOB > 11.5). |
Use Scenario: Industrial PLC analog input module measuring 4–20 mA loop signals. IC Role / Device Role / Timing Role: Stable reference for 16-bit sigma-delta ADC front-end, rejecting supply ripple. Use Value: 50 ppm/°C TC and 0.7 mV thermal hysteresis ensure <0.02% reading drift across field temperature swings. |
| Automotive Sensor Conditioning | Precision Audio Biasing |
Use Scenario: Engine coolant temperature sensor signal conditioning in powertrain ECU. IC Role / Device Role / Timing Role: AEC-Q100 qualified reference for ratiometric RTD bridge excitation and ADC conversion. Use Value: Grade 1 qualification and −40°C to 125°C operation guarantee accuracy across engine bay thermal cycles. |
Use Scenario: High-fidelity DAC output stage requiring ultra-low-noise DC bias. IC Role / Device Role / Timing Role: Low-noise 2.048 V reference for op-amp offset nulling and common-mode level setting. Use Value: 41 μVrms noise floor prevents audible hiss; 0.3 Ω dynamic impedance suppresses supply-induced distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040C20IDBZR | 2.048 V, ±0.5% initial tolerance, 100 ppm/°C max TC, 50 μVrms noise, SOT-23 | Lower accuracy and higher drift; suitable for cost-sensitive non-precision systems | Select when ±0.5% tolerance and relaxed TC meet system error budget and AEC-Q100 is not required. |
| MAX6002AEUR+T | 2.048 V, ±0.1% initial tolerance, 75 ppm/°C max TC, 35 μVrms noise, SOT-23 | Lower noise but higher TC; not AEC-Q100 qualified; max 10 mA operating current | Prefer for ultra-low-noise audio or medical sensors where automotive qualification is unnecessary. |
Compared with LM4050QAEM3X2.0/NOPB, LM4040C20IDBZR trades accuracy and stability for cost, while MAX6002AEUR+T offers lower noise but lacks automotive qualification and current headroom-making LM4050QAEM3X2.0/NOPB optimal for AEC-Q100-compliant, high-accuracy, wide-current industrial and automotive designs.
Availability
LM4050QAEM3X2.0/NOPB is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive sensor modules, and precision data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4050QAEM3X2.0/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 validation.
The LM4050-N product line delivers micropower shunt references optimized for space-constrained, high-accuracy applications-including automotive, industrial, and portable instrumentation-where low drift, low noise, and qualification rigor are mandatory.
FAQ
What is the maximum operating temperature range for LM4050QAEM3X2.0/NOPB?
The LM4050QAEM3X2.0/NOPB is rated for the extended temperature range of −40°C to +125°C, validated per AEC-Q100 Grade 1 requirements. This makes it suitable for under-hood automotive applications and industrial environments where junction temperatures exceed 85°C. Its thermal hysteresis remains limited to 0.7 mV across this full range, ensuring repeatable voltage accuracy after thermal cycling.
Does LM4050QAEM3X2.0/NOPB require an external output capacitor?
No, LM4050QAEM3X2.0/NOPB does not require an external output capacitor due to internal compensation. It remains stable with or without capacitive loading up to 10 nF. Adding a bypass capacitor is optional and does not affect regulation-this eliminates a BOM item and simplifies PCB layout while maintaining performance in noisy systems.
What is the minimum cathode current needed for regulation in LM4050QAEM3X2.0/NOPB?
The LM4050QAEM3X2.0/NOPB requires a minimum cathode current of 60 μA at 25°C (41 μA typical) to maintain regulation. At full temperature range (−40°C to 125°C), the minimum increases to 65 μA. Below this threshold, output voltage deviates beyond specification; proper RS sizing must ensure this current is met under worst-case supply and load conditions.
How does the 2.048 V output of LM4050QAEM3X2.0/NOPB benefit ADC/DAC systems?
The 2.048 V output of LM4050QAEM3X2.0/NOPB aligns precisely with binary scaling (211 = 2048), enabling 1 mV-per-LSB resolution in 11-bit systems and clean integer mapping in 12-bit converters with 2 V full-scale. This eliminates gain calibration and reduces firmware complexity-critical for metrology, energy metering, and portable test equipment using LM4050QAEM3X2.0/NOPB.
Is LM4050QAEM3X2.0/NOPB pin-compatible with other LM4050 variants?
Yes, LM4050QAEM3X2.0/NOPB shares identical SOT-23 (DBZ) pinout and footprint with all LM4050-N and LM4050-N-Q1 variants-including LM4050AIM3X2.0/NOPB and LM4050BEM3X2.0/NOPB. Pin 1 (Cathode), Pin 2 (Anode), and Pin 3 (NC) retain identical functions and mechanical placement, enabling drop-in replacement within the same voltage grade and package variant.
LM4050QAEM3X2.0/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):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 34µVrms
- 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
LM4050QAEM3X2.0/NOPB FAQ
1.How can I place an order for LM4050QAEM3X2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QAEM3X2.0/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 LM4050QAEM3X2.0/NOPB reliable?
The price and inventory of LM4050QAEM3X2.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QAEM3X2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QAEM3X2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QAEM3X2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QAEM3X2.0/NOPB?
LM4050QAEM3X2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QAEM3X2.0/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 LM4050QAEM3X2.0/NOPB?
For technical support, including LM4050QAEM3X2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QAEM3X2.0/NOPB requirements.
6.How does Aetrix verify that LM4050QAEM3X2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QAEM3X2.0/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 LM4050QAEM3X2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QAEM3X2.0/NOPB?
All LM4050QAEM3X2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QAEM3X2.0/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 LM4050QAEM3X2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4050QAEM3X2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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