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Texas Instruments LM4050AEM3X-8.2/NOPB
- Part No.:
- LM4050AEM3X-8.2/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050AEM3X-8.2/NOPB.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,039
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Product details
Overview
LM4050AEM3X-8.2/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering 8.192 V nominal reverse breakdown voltage with ±0.1% initial tolerance (A grade), 50 ppm/°C max temperature coefficient, and 150 μVRMS wideband noise (10 Hz–10 kHz) at 150 μA operating current. It operates from 74 μA to 15 mA and supports industrial (−40°C to +85°C) and extended (−40°C to +125°C) temperature ranges.
For engineers reviewing the LM4050AEM3X-8.2/NOPB datasheet, LM4050AEM3X-8.2/NOPB pinout, LM4050AEM3X-8.2/NOPB application, or LM4050AEM3X-8.2/NOPB equivalent, this device serves as a stable, capacitor-free reference for high-resolution ADCs, portable instrumentation, and automotive-grade sensor signal conditioning where low quiescent current and minimal thermal drift are critical.
Technical Context
The LM4050AEM3X-8.2/NOPB uses bandgap reference architecture with curvature-corrected Zener-zap trimming to achieve ±0.1% accuracy at 25°C and maintain stability across −40°C to +125°C. Its shunt topology requires only an external current-limiting resistor and tolerates any capacitive load without oscillation.
It features fuse-trimmed reverse breakdown voltage during wafer sort, low dynamic impedance (0.6 Ω typical at 1 mA), and no output capacitor requirement-enabling compact, low-BOM-count designs in space-constrained applications such as handheld test equipment and battery-powered data loggers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 8.192 V nominal reverse breakdown voltage, fixed and non-adjustable |
| Initial Tolerance | ±0.1% at 25°C (A grade), enabling high-accuracy calibration without post-manufacture trimming |
| Temp. Coefficient | ≤50 ppm/°C over −40°C to +125°C, minimizing system-level gain drift in precision measurement |
| Operating Current | 74 μA min to 15 mA max, supporting ultra-low-power sensor biasing and high-current reference buffering |
| Output Noise | 150 μVRMS (10 Hz–10 kHz), suitable for 16-bit+ ADC reference without additional filtering |
| Dynamic Impedance | 0.6 Ω typical at 1 mA, ensuring stable regulation under varying load transients |
| Long-Term Stability | 120 ppm after 1000 hrs, supporting reliable performance in deployed industrial systems |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, surface-mount, 3-pin configuration with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage sense node | Connects to regulated voltage rail; sinks all reference current plus load current |
| Anode (Pin 2) | Common return / ground reference | Must be connected to system ground; defines 0 V reference point for output |
| NC (Pin 3) | No internal connection | Left floating per datasheet; no PCB trace or solder required |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables single-resistor biasing and eliminates capacitor-related aging, ESR, and layout sensitivity |
| Tolerates capacitive loads | Stable operation with >100 nF bypass caps on cathode, simplifying noise filtering in mixed-signal PCBs |
| Sub-miniature SOT-23 package | 3 mm × 1.3 mm footprint saves board space in portable and wearable electronics |
| Wide operating current range | 74 μA to 15 mA allows use in both nanoamp sensor front-ends and op-amp buffer stages |
| Low thermal hysteresis | 2.3 mV over −40°C ↔ +125°C cycling ensures repeatable voltage after thermal stress |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter with 20-bit sigma-delta ADC requiring stable reference under battery voltage sag. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 8.192 V reference for ADC full-scale calibration. Use Value: ±0.1% initial tolerance and 50 ppm/°C TC ensure <0.02% total error across 0–40°C operating range without software correction. |
Use Scenario: Industrial PLC analog input module digitizing 4–20 mA sensor signals with 16-bit resolution. IC Role / Device Role / Timing Role: Precision reference for programmable gain instrumentation amplifier and SAR ADC reference input. Use Value: 150 μVRMS noise and 0.6 Ω dynamic impedance prevent reference-induced quantization noise floor elevation. |
| Automotive Sensor Conditioning | Precision Audio Components |
Use Scenario: Engine control unit (ECU) monitoring rail voltage and coolant temperature using ratiometric sensors. IC Role / Device Role / Timing Role: Stable 8.192 V reference for ratiometric ADC reference and microcontroller VREF input. Use Value: AEC-Q100 Grade 1 qualification (LM4050AEM3X-8.2/NOPB is pin-compatible with Q1 variant) ensures reliability in −40°C to +125°C under hood environments. |
Use Scenario: High-fidelity DAC-based audio line driver requiring ultra-low-noise analog supply reference. IC Role / Device Role / Timing Role: Low-noise shunt reference for op-amp bias networks and DAC reference buffers. Use Value: No-output-capacitor design avoids ceramic microphonic effects; 150 μVRMS noise preserves dynamic range in 110 dB SNR systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040AIX3-8.2/NOPB | Higher minimum operating current (100 μA vs. 74 μA); 40 ppm/°C TC; 120 μVRMS noise | Better noise performance but less suitable for ultra-low-current sensor biasing | Select when lower noise is prioritized over micropower operation |
| REF5040AIDR | Series topology; 4.096 V output; 3 ppm/°C TC; requires input capacitor; SOIC-8 package | Lower drift and higher accuracy, but larger footprint and higher quiescent current (1.1 mA) | Select for metrology-grade stability where board space and power budget allow |
Compared with LM4040AIX3-8.2/NOPB and REF5040AIDR, the LM4050AEM3X-8.2/NOPB uniquely balances micropower operation (74 μA), tight tolerance (±0.1%), and SOT-23 compactness-making it optimal for battery-powered, space-constrained, and automotive-qualified designs where shunt topology suffices.
Availability
LM4050AEM3X-8.2/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, automotive sensor modules, and industrial data acquisition systems requiring stable component supply with guaranteed long-term availability and TI-authorized traceability.
Supply support for LM4050AEM3X-8.2/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 digital signal technologies with over 50 years of precision reference design heritage.
The LM4050-N product line was engineered for space-constrained, micropower applications demanding high initial accuracy and low thermal drift-targeting portable test gear, automotive sensors, and industrial process control systems.
FAQ
What is the minimum operating current for LM4050AEM3X-8.2/NOPB?
The LM4050AEM3X-8.2/NOPB requires a minimum operating current of 74 μA at 25°C and up to 95 μA across the industrial temperature range (−40°C to +85°C). This value is specified in Section 6.9 of the datasheet under "Minimum Operating Current" for the 8.2-V option and A grade. Below this current, regulation degrades and output voltage deviates beyond tolerance limits. The LM4050AEM3X-8.2/NOPB must be biased above this threshold via an external series resistor.
Does LM4050AEM3X-8.2/NOPB require an output capacitor?
No, the LM4050AEM3X-8.2/NOPB does not require an output capacitor for stability. Its internal design eliminates the need for external capacitance while maintaining stability with any capacitive load-including large (>100 nF) bypass capacitors on the cathode. This feature simplifies layout and improves reliability in battery-powered systems where capacitor aging or microphonics matter. The LM4050AEM3X-8.2/NOPB achieves this via optimized dynamic impedance and internal compensation.
What is the temperature coefficient specification for LM4050AEM3X-8.2/NOPB?
The LM4050AEM3X-8.2/NOPB has a maximum average temperature coefficient of 50 ppm/°C over the full operating range of −40°C to +125°C. This value is guaranteed for the A grade and appears in Section 6.9 under "Average reverse breakdown voltage temperature coefficient." At 25°C, the typical TC is ±20 ppm/°C. This low drift enables accurate voltage references in environments with wide ambient swings-critical for automotive and industrial applications where the LM4050AEM3X-8.2/NOPB is commonly deployed.
Is LM4050AEM3X-8.2/NOPB qualified for automotive use?
The LM4050AEM3X-8.2/NOPB itself is not AEC-Q100 qualified; however, its pin-compatible counterpart LM4050AQEM3X-8.2/NOPB is AEC-Q100 Grade 1 qualified (−40°C to +125°C). Both share identical electrical specifications, SOT-23 (DBZ) package, and pinout. For automotive applications requiring qualification, designers should select the Q1 variant. The LM4050AEM3X-8.2/NOPB remains suitable for industrial and commercial systems where AEC-Q100 is not mandated.
What is the wideband noise performance of LM4050AEM3X-8.2/NOPB?
The LM4050AEM3X-8.2/NOPB delivers 150 μVRMS wideband noise over the 10 Hz to 10 kHz frequency range, measured at 150 μA operating current (Section 6.9, "Wideband Noise"). This noise level is confirmed in the Electrical Characteristics table for the 8.2-V option and directly impacts high-resolution ADC performance. When used as a reference for 16-bit or higher converters, this noise contributes <0.5 LSB error-making the LM4050AEM3X-8.2/NOPB appropriate for precision measurement without additional filtering.
LM4050AEM3X-8.2/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):
- 8.192V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 150µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 100 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050AEM3X-8.2/NOPB FAQ
1.How can I place an order for LM4050AEM3X-8.2/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AEM3X-8.2/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-8.2/NOPB reliable?
The price and inventory of LM4050AEM3X-8.2/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-8.2/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050AEM3X-8.2/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AEM3X-8.2/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AEM3X-8.2/NOPB?
LM4050AEM3X-8.2/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AEM3X-8.2/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-8.2/NOPB?
For technical support, including LM4050AEM3X-8.2/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AEM3X-8.2/NOPB requirements.
6.How does Aetrix verify that LM4050AEM3X-8.2/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050AEM3X-8.2/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-8.2/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050AEM3X-8.2/NOPB?
All LM4050AEM3X-8.2/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AEM3X-8.2/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-8.2/NOPB part is unused and in its original packaging.
Return procedure for LM4050AEM3X-8.2/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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