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Texas Instruments LM4050AEM3-2.0/NOPB
- Part No.:
- LM4050AEM3-2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050AEM3-2.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,315
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Product details
Overview
LM4050AEM3-2.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering 2.048 V ±0.1% (A-grade) 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. It serves as a low-drift, low-noise reference in high-resolution ADCs and portable instrumentation.
For engineers reviewing the LM4050AEM3-2.0/NOPB datasheet, LM4050AEM3-2.0/NOPB pinout, LM4050AEM3-2.0/NOPB application, or LM4050AEM3-2.0/NOPB equivalent, key selection criteria include initial accuracy, thermal stability over −40°C to +125°C, capacitive load tolerance without external capacitor, dynamic impedance ≤0.3 Ω, and long-term drift <120 ppm.
Technical Context
The LM4050AEM3-2.0/NOPB uses bandgap-based Zener-zap trimmed reverse breakdown architecture with curvature-corrected temperature compensation. Its shunt topology requires an external current-limiting resistor but eliminates need for output capacitor while maintaining stability with any capacitive load up to 10 nF.
It operates across 60 μA–15 mA cathode current, with reverse dynamic impedance of 0.3 Ω at 1 mA and thermal hysteresis of 0.7 mV over −40°C to +125°C cycling. The device achieves ±0.1% initial tolerance via wafer-level fuse trimming and supports both industrial (−40°C to +85°C) and extended (−40°C to +125°C) temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal, ±0.1% max tolerance at 25°C - enables 12-bit+ system accuracy without calibration |
| Temp Coefficient | 50 ppm/°C max over −40°C to +125°C - ensures <±1.3 mV total drift across full range |
| Output Noise | 41 μVrms (10 Hz–10 kHz) - supports low-noise precision measurement front-ends |
| Dynamic Impedance | 0.3 Ω at 1 mA - minimizes load-induced voltage variation in varying-current applications |
| Operating Current | 60 μA min to 15 mA max - allows ultra-low-power battery operation and robust drive capability |
| Long-Term Drift | 120 ppm over 1000 hrs - ensures stable reference performance in deployed systems |
| Thermal Hysteresis | 0.7 mV over −40°C ↔ +125°C cycle - maintains repeatability after thermal stress |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, 3-pin surface-mount configuration with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / reference voltage node | Connects to regulated voltage rail via series resistor; voltage develops across this terminal |
| Anode (Pin 2) | Common return / ground reference | Must be connected to system ground; defines 0 V reference for output voltage |
| NC (Pin 3) | No internal connection | Left floating per datasheet; no PCB trace or component required |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable with any capacitive load up to 10 nF - simplifies layout and reduces BOM count |
| Tolerates capacitive loads | Guaranteed stability without external compensation - eliminates risk of oscillation in sensor interfaces |
| Fuse and Zener-zap trim | Wafer-sort accuracy better than ±0.1% (A grade) - reduces post-manufacturing calibration effort |
| Low quiescent current | 60 μA minimum operating current - extends battery life in portable equipment |
| Wide temperature range | Specified from −40°C to +125°C - suitable for automotive under-hood and industrial control environments |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter with 16-bit SAR ADC requiring stable excitation and reference. IC Role / Device Role / Timing Role: Shunt voltage reference providing 2.048 V reference for ADC and analog front-end. Use Value: ±0.1% initial accuracy and 50 ppm/°C drift ensure <±0.02% full-scale error over temperature without recalibration. |
Use Scenario: Industrial PLC analog input module measuring 4–20 mA sensor signals. IC Role / Device Role / Timing Role: Precision reference for current-to-voltage conversion and ADC reference. Use Value: 41 μVrms noise and 0.3 Ω dynamic impedance minimize quantization uncertainty and load-induced error. |
| Energy Management | Precision Audio Components |
Use Scenario: Smart meter voltage monitoring channel with metrology-grade accuracy requirements. IC Role / Device Role / Timing Role: Reference for isolated voltage sensing and energy calculation IC. Use Value: 120 ppm long-term stability ensures >10-year calibration retention in field-deployed units. |
Use Scenario: High-fidelity DAC reference supply in professional audio interface. IC Role / Device Role / Timing Role: Low-noise shunt reference for DAC voltage reference input. Use Value: 41 μVrms noise floor preserves SNR >110 dB in 24-bit audio conversion paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3020AIDBZR | 2.048 V, ±0.2% initial accuracy, 50 ppm/°C, 25 μVrms noise, 50 μA min current | Lower noise but looser initial tolerance; requires 1-μF output capacitor for stability | Prefer when ultra-low noise dominates over initial accuracy and board space permits capacitor |
| ADR3420ARJZ-R7 | 2.048 V, ±0.1% initial accuracy, 30 ppm/°C, 50 μVrms noise, 100 μA min current | Lower tempco but higher minimum current; SOT-23-5 package with enable pin | Prefer when tighter thermal drift is critical and system can support 100 μA minimum bias |
Compared with REF3020AIDBZR and ADR3420ARJZ-R7, the LM4050AEM3-2.0/NOPB offers the lowest minimum operating current (60 μA) and capacitor-free stability, making it optimal for space-constrained, ultra-low-power designs where initial accuracy and moderate noise are prioritized over absolute minimum drift or lowest noise floor.
Availability
LM4050AEM3-2.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, data acquisition systems, and energy management applications requiring stable component supply, long-lifecycle availability, and guaranteed TI original sourcing.
Supply support for LM4050AEM3-2.0/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, embedded processing, and power management technologies, with decades of leadership in precision reference design.
The LM4050-N family was engineered for space-constrained, low-power systems needing high-accuracy shunt references-targeting portable test equipment, industrial sensors, and automotive subsystems where reliability and thermal stability are critical.
FAQ
What is the output voltage tolerance of LM4050AEM3-2.0/NOPB at 25°C?
The LM4050AEM3-2.0/NOPB has a guaranteed initial output voltage tolerance of ±0.1% at 25°C, corresponding to ±2.048 mV around its nominal 2.048 V output. This A-grade specification is achieved via wafer-level Zener-zap trimming and is fully production-tested per the TI datasheet SNOS455G.
Does LM4050AEM3-2.0/NOPB require an external output capacitor?
No, the LM4050AEM3-2.0/NOPB does not require an external output capacitor. Its internal design ensures stability with any capacitive load, including direct connection to ADC reference inputs or op-amp feedback networks up to 10 nF-eliminating capacitor-related layout constraints and BOM cost.
What is the minimum operating current for LM4050AEM3-2.0/NOPB?
The LM4050AEM3-2.0/NOPB requires a minimum cathode current of 60 μA at 25°C to maintain regulation within specifications. At full temperature range (−40°C to +125°C), the minimum increases to 65 μA. Below this, output voltage deviates beyond tolerance limits.
Can LM4050AEM3-2.0/NOPB operate over the automotive temperature range?
Yes, the LM4050AEM3-2.0/NOPB is specified for operation from −40°C to +125°C (extended temperature range), meeting requirements for under-hood automotive applications. While not AEC-Q100 qualified itself, its parametric performance matches that of the automotive-grade LM4050-Q1 variants.
What is the thermal hysteresis of LM4050AEM3-2.0/NOPB?
The LM4050AEM3-2.0/NOPB exhibits 0.7 mV thermal hysteresis over a −40°C to +125°C temperature cycle, defined as the voltage difference measured at 25°C after exposure to −40°C versus after exposure to +125°C. This low hysteresis supports repeatable measurements in thermally cycled systems.
LM4050AEM3-2.0/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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050AEM3-2.0/NOPB FAQ
1.How can I place an order for LM4050AEM3-2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AEM3-2.0/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 LM4050AEM3-2.0/NOPB reliable?
The price and inventory of LM4050AEM3-2.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050AEM3-2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050AEM3-2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AEM3-2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AEM3-2.0/NOPB?
LM4050AEM3-2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AEM3-2.0/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 LM4050AEM3-2.0/NOPB?
For technical support, including LM4050AEM3-2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AEM3-2.0/NOPB requirements.
6.How does Aetrix verify that LM4050AEM3-2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050AEM3-2.0/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 LM4050AEM3-2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050AEM3-2.0/NOPB?
All LM4050AEM3-2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AEM3-2.0/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 LM4050AEM3-2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4050AEM3-2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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