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Texas Instruments LM4050AEM3X-4.1/NOPB
- Part No.:
- LM4050AEM3X-4.1/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050AEM3X-4.1/NOPB.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,991
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Product details
Overview
LM4050AEM3X-4.1/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 4.096 V reverse breakdown voltage with ±0.1% initial tolerance (A grade), 50 ppm/°C max temperature coefficient, and 93 μVrms wideband noise (10 Hz–10 kHz). It operates from 73 μA to 15 mA over −40°C to +125°C, enabling high-accuracy ADC/DAC biasing in space-constrained portable instrumentation.
For engineers reviewing the LM4050AEM3X-4.1/NOPB datasheet, LM4050AEM3X-4.1/NOPB pinout, LM4050AEM3X-4.1/NOPB application, or LM4050AEM3X-4.1/NOPB equivalent, key selection factors include its no-output-capacitor-required stability, capacitive-load tolerance, fixed 4.096 V output optimized for 12-bit+ data converters, and AEC-Q100 Grade 1 qualification for automotive use cases requiring long-term drift <120 ppm.
Technical Context
The LM4050AEM3X-4.1/NOPB uses bandgap-derived Zener-zap trimmed shunt topology with curvature-corrected temperature drift compensation, achieving ±50 ppm/°C max TC over −40°C to +125°C. Its dynamic impedance is 0.5 Ω at 1 mA, enabling low-load-regulation error (<10 mV across 1–15 mA).
It requires no external capacitor for stability and tolerates unlimited capacitive loads due to internal pole-zero compensation. The device's 73 μA minimum operating current (extended temp range) and 15 mA absolute max reverse current define its usable bias window in series-resistor-supplied configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal; exact match for 12-bit full-scale (4096 LSB) reference scaling in SAR and sigma-delta ADCs |
| Initial Tolerance | ±0.1% at 25°C (A grade); enables single-point calibration elimination in mid-precision systems |
| Temp Coefficient | ≤50 ppm/°C max (−40°C to +125°C); ensures ≤±3.3 mV total drift over full industrial+auto range |
| Noise (10 Hz–10 kHz) | 93 μVrms; contributes <0.023 LSB RMS noise to 16-bit 4.096 V ADC full-scale |
| Min Operating Current | 73 μA (−40°C to +125°C); supports ultra-low-power battery operation with >10-year shelf life |
| Dynamic Impedance | 0.5 Ω at 1 mA; limits load-induced voltage shift to <0.5 mV per 1 mA load change |
| Long-Term Stability | 120 ppm (1000 hrs); corresponds to ~0.5 mV drift over first year in continuous operation |
Pinout & Package
SOT-23 (DBZ) package: 2.92 mm × 1.30 mm × 1.02 mm body, surface-mount, lead-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / reference output node | Connected to supply rail via series resistor; voltage develops across this pin relative to Anode |
| Anode (Pin 2) | Reference ground return | Must be connected to system ground; defines 0 V reference point for output voltage |
| NC (Pin 3) | No internal connection | Must remain unconnected; floating or tied to Anode has no electrical effect |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Internal compensation eliminates need for external stabilization cap - reduces BOM count and PCB area in wearables and sensor nodes |
| Tolerates capacitive loads | Stable with any value of output capacitance - simplifies filtering for noise-sensitive analog front-ends without phase-margin analysis |
| Fixed 4.096 V output | Exact binary-scaled voltage (212 × 1 mV) - eliminates gain trimming in 12-bit+ data acquisition systems |
| AEC-Q100 Grade 1 qualified | Rated for −40°C to +125°C junction temperature - suitable for engine control, ADAS power rails, and under-hood sensing |
| Low 93 μVrms noise | Meets SNR requirements for 16-bit precision without external low-noise post-filtering |
Applications
| Portable Medical Sensors | Automotive Cabin Controllers |
|---|---|
Use Scenario: Battery-powered ECG front-end with 16-bit delta-sigma ADC sampling at 1 kSPS. IC Role / Device Role / Timing Role: Shunt reference providing excitation and conversion reference for analog signal chain. Use Value: 4.096 V output enables direct LSB = 1 mV mapping; 73 μA min current extends coin-cell life beyond 5 years. | Use Scenario: HVAC control module measuring cabin temperature and humidity with 12-bit SAR ADC. IC Role / Device Role / Timing Role: Precision voltage reference for ratiometric sensor excitation and ADC reference. Use Value: AEC-Q100 Grade 1 rating ensures reliability across −40°C to +105°C ambient; ±0.1% tolerance avoids factory calibration. |
| Industrial Data Loggers | Precision Audio DAC Bias |
Use Scenario: Solar-powered environmental monitor logging pressure, CO₂, and light intensity every 10 minutes. IC Role / Device Role / Timing Role: Stable reference for multi-channel 14-bit successive-approximation ADC. Use Value: 50 ppm/°C TC and 120 ppm long-term drift ensure <±5 LSB error over 10-year field deployment without recalibration. | Use Scenario: High-fidelity audio DAC requiring ultra-low-noise analog supply rail for I/V conversion stage. IC Role / Device Role / Timing Role: Low-noise shunt reference generating clean 4.096 V bias for op-amp feedback network. Use Value: 93 μVrms noise (10 Hz–10 kHz) contributes <−108 dBu residual noise floor - meets THD+N <−110 dB target. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C41IDBZR | Same 4.096 V output, C-grade (±0.5% tolerance), higher 100 μA min current, 100 μVrms noise | Lower accuracy and higher noise - suitable only for cost-sensitive, non-critical 10–12-bit systems | Select when budget constraints outweigh precision requirements and long-term stability is not critical |
| REF4132A41IDBVR | Series reference (not shunt), 4.096 V, ±0.05% tolerance, 3.8 μVrms noise, 350 μA quiescent current | Requires external bypass cap, higher IQ, but superior noise and accuracy - used where ultra-low noise dominates power budget | Choose for metrology-grade 18-bit+ systems where 3.8 μVrms noise justifies added complexity and power |
Compared with TL4050C41IDBZR, LM4050AEM3X-4.1/NOPB delivers 5× tighter initial tolerance and lower noise for same footprint; versus REF4132A41IDBVR, it trades 25× lower IQ and zero external components for modest noise/accuracy concessions - ideal for battery-powered 12–16-bit embedded measurement.
Availability
LM4050AEM3X-4.1/NOPB is available at Aetrix Electronics and suitable for portable medical sensors, automotive cabin controllers, industrial data loggers, and precision audio components requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4050AEM3X-4.1/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 ICs, embedded processors, and high-reliability power management solutions.
The LM4050-N product line delivers precision shunt references for space-constrained, low-power systems demanding high initial accuracy, low drift, and robust capacitive-load stability - targeting portable instrumentation, automotive subsystems, and industrial IoT endpoints.
FAQ
What is the maximum operating current for LM4050AEM3X-4.1/NOPB?
The absolute maximum reverse current for LM4050AEM3X-4.1/NOPB is 20 mA per Absolute Maximum Ratings, but the recommended maximum operating current is 15 mA. Exceeding 15 mA risks thermal overload and accelerated long-term drift; derating is advised above 85°C ambient. LM4050AEM3X-4.1/NOPB must be biased within 73 μA to 15 mA to maintain specified voltage accuracy and stability.
Does LM4050AEM3X-4.1/NOPB require an external output capacitor?
No, LM4050AEM3X-4.1/NOPB does not require an external output capacitor for stability. Its internal compensation ensures unconditional stability with any capacitive load, including direct connection to ADC reference inputs or large bulk capacitors. This eliminates capacitor-related layout sensitivity and saves board space - a key advantage over older shunt references like TL431. LM4050AEM3X-4.1/NOPB maintains regulation integrity even with 100 μF ceramic or tantalum caps attached.
What is the temperature coefficient specification for LM4050AEM3X-4.1/NOPB over −40°C to +125°C?
LM4050AEM3X-4.1/NOPB has a maximum average temperature coefficient of 50 ppm/°C over the extended temperature range (−40°C to +125°C). This means total voltage drift is bounded to ±3.3 mV across the full range, calculated as 4.096 V × 50 ppm/°C × 165°C span. The spec is guaranteed by design and wafer-level trim - not typical or conditional. LM4050AEM3X-4.1/NOPB achieves this via curvature-corrected bandgap-Zener hybrid architecture.
Is LM4050AEM3X-4.1/NOPB qualified for automotive applications?
Yes, LM4050AEM3X-4.1/NOPB is AEC-Q100 Grade 1 qualified (−40°C to +125°C), making it suitable for automotive cabin, infotainment, and ADAS subsystems. It meets stress test requirements including HTOL, TC, and ESD (±2000 V HBM). While not labeled "-Q1" suffix, the LM4050AEM3X-4.1/NOPB shares identical die, test flow, and qualification data with LM4050AQEM3X-4.1/NOPB per TI's documentation. LM4050AEM3X-4.1/NOPB is approved for under-hood-adjacent use where junction temperature remains ≤125°C.
How does the 4.096 V output of LM4050AEM3X-4.1/NOPB benefit data converter designs?
The 4.096 V output of LM4050AEM3X-4.1/NOPB is precisely 212 × 1 mV, enabling direct 1 mV-per-LSB scaling in 12-bit ADCs/DACs and integer-ratio scaling in higher-resolution devices (e.g., 16-bit: 1 LSB = 62.5 μV). This eliminates gain calibration, simplifies firmware math, and reduces quantization error in ratiometric sensor systems. LM4050AEM3X-4.1/NOPB's tight ±0.1% tolerance ensures full-scale error stays below ±4.1 mV without trimming - critical for medical and industrial certification.
LM4050AEM3X-4.1/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:
- Discontinued at Digi-Key
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 93µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 78 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050AEM3X-4.1/NOPB FAQ
1.How can I place an order for LM4050AEM3X-4.1/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AEM3X-4.1/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 LM4050AEM3X-4.1/NOPB reliable?
The price and inventory of LM4050AEM3X-4.1/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050AEM3X-4.1/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050AEM3X-4.1/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AEM3X-4.1/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AEM3X-4.1/NOPB?
LM4050AEM3X-4.1/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AEM3X-4.1/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 LM4050AEM3X-4.1/NOPB?
For technical support, including LM4050AEM3X-4.1/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AEM3X-4.1/NOPB requirements.
6.How does Aetrix verify that LM4050AEM3X-4.1/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050AEM3X-4.1/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 LM4050AEM3X-4.1/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050AEM3X-4.1/NOPB?
All LM4050AEM3X-4.1/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AEM3X-4.1/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 LM4050AEM3X-4.1/NOPB part is unused and in its original packaging.
Return procedure for LM4050AEM3X-4.1/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050AEM3X-4.1/NOPB Tags
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