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Texas Instruments LM4050AEM3X-10
- Part No.:
- LM4050AEM3X-10
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050AEM3X-10.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,360
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Product details
Overview
LM4050AEM3X-10 from Texas Instruments is a precision micropower shunt voltage reference with 10 V nominal reverse breakdown voltage, ±0.1% initial tolerance (A grade), 50 ppm/°C max temperature coefficient, and 100 μA minimum operating current. It operates across −40°C to 125°C and delivers stable reference voltage in space-constrained analog signal chains for high-resolution data acquisition systems.
For engineers reviewing the LM4050AEM3X-10 datasheet, LM4050AEM3X-10 pinout, LM4050AEM3X-10 application, or LM4050AEM3X-10 equivalent, key selection criteria include its SOT-23 package compatibility, no-output-capacitor-required operation, capacitive load tolerance, low 150 μVrms wideband noise (10 Hz–10 kHz), and industrial/automotive-grade thermal stability.
Technical Context
The LM4050AEM3X-10 uses bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation. Its dynamic impedance remains below 0.7 Ω at 1 mA, enabling stable regulation under varying load currents from 100 μA to 15 mA.
It achieves ±0.1% accuracy at 25°C via wafer-level fuse trimming and maintains tight long-term stability (120 ppm after 1000 hrs) and low thermal hysteresis (2.8 mV over −40°C to 125°C cycling). No external capacitor is required, and it tolerates arbitrary capacitive loads without oscillation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 10 V nominal reverse breakdown voltage, verified at 150 μA test current |
| Initial Tolerance | ±0.1% at 25°C (A grade), enabling high-accuracy ADC/DAC biasing without calibration |
| Temp Coefficient | 50 ppm/°C max over −40°C to 125°C, ensuring <±5.2 mV total drift across full range |
| Min Operating Current | 100 μA (typical), supporting ultra-low-power battery-operated sensor nodes |
| Dynamic Impedance | 0.7 Ω max at 1 mA, minimizing load-induced voltage shift in precision feedback paths |
| Wideband Noise | 150 μVrms (10 Hz–10 kHz), suitable for 16-bit+ data converters requiring clean references |
| Long-Term Stability | 120 ppm after 1000 hours, reducing recalibration frequency in field-deployed instrumentation |
Pinout & Package
SOT-23 (DBZ) package: 2.92 mm × 1.30 mm body, 3-pin surface-mount, JEDEC MO-178 compatible. Thermal resistance RθJA = 287°C/W (board mounted).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / reference output node | Connects to regulated voltage rail; sinks all current not drawn by load |
| Anode (Pin 2) | Common reference ground | Must be connected to system ground; defines 0 V reference point |
| NC (Pin 3) | No internal connection | Left floating per datasheet; no PCB trace or pad required |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable operation with zero external capacitance, simplifying layout and reducing BOM count |
| Capacitive load tolerance | Immune to instability with any value or ESR of output capacitance, enabling direct buffering |
| Fixed 10 V breakdown option | Matches standard DAC/ADC full-scale ranges and eliminates resistor-divider error sources |
| Low 150 μVrms noise | Preserves SNR in 16-bit+ SAR and delta-sigma converters without additional filtering |
| −40°C to 125°C operation | Validated performance across automotive under-hood and industrial control environments |
Applications
| Portable Instrumentation | Data Acquisition Front-End |
|---|---|
Use Scenario: Handheld multimeter with 200 kSPS sampling and 16-bit resolution. IC Role / Device Role / Timing Role: Shunt reference providing stable 10 V reference for SAR ADC driver stage. Use Value: Enables ±0.1% absolute accuracy without factory calibration; 100 μA min current supports >100 hr battery life. |
Use Scenario: Isolated industrial DAQ module measuring thermocouple and RTD signals. IC Role / Device Role / Timing Role: Primary reference for dual 24-bit delta-sigma ADCs in isolated analog front-end. Use Value: 150 μVrms noise and 50 ppm/°C TC ensure <1 LSB error over temperature; SOT-23 saves space on isolated side. |
| Precision Process Control | Automotive Sensor Signal Conditioning |
Use Scenario: Loop-powered 4–20 mA transmitter with HART modulation. IC Role / Device Role / Timing Role: Reference for 16-bit DAC generating precise current setpoint. Use Value: 120 ppm long-term stability reduces annual recalibration; 10 V output matches DAC full-scale for 0–5 V output scaling. |
Use Scenario: Engine control unit (ECU) pressure sensor interface with AEC-Q100 compliance requirement. IC Role / Device Role / Timing Role: Stable reference for ratiometric bridge amplifier and ADC in harsh under-hood environment. Use Value: Validated −40°C to 125°C operation and 2.8 mV thermal hysteresis ensure repeatable readings after thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3010AIDBZR | Series reference (not shunt); requires ≥20 μA quiescent + load current; 100 μVrms noise | Needs input supply ≥10.3 V; unsuitable for low-voltage or floating-bus designs | Select when higher PSRR or lower noise is critical and supply headroom permits series topology |
| ADR3410ARJZ-R7 | Series reference; 10 ppm/°C max TC; 12 μVp-p (0.1–10 Hz); 100 μA quiescent | Requires ≥11.5 V supply; incompatible with shunt-based current-source topologies | Prefer for ultra-low-drift applications where supply margin allows and noise below 10 Hz dominates |
Compared with REF3010AIDBZR and ADR3410ARJZ-R7, the LM4050AEM3X-10 offers true shunt operation with no minimum supply voltage constraint, supports floating or grounded configurations, and delivers proven stability with capacitive loads-critical for compact, low-headroom, or isolated reference designs.
Availability
LM4050AEM3X-10 is available at Aetrix Electronics and suitable for portable instrumentation, industrial data acquisition, and automotive sensor conditioning requiring stable component supply, long-lifecycle support, and guaranteed AEC-Q100-compatible variants.
Supply support for LM4050AEM3X-10 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 expertise in precision reference design.
The LM4050-N product line delivers micropower shunt voltage references optimized for space-constrained, battery-powered, and high-accuracy measurement systems demanding low drift, low noise, and robust thermal performance.
FAQ
What is the minimum operating current for LM4050AEM3X-10?
The LM4050AEM3X-10 requires a minimum operating current of 100 μA (typical) to maintain regulation within specification. This value is confirmed in Section 6.10 of the TI datasheet (SNOS455G) under Electrical Characteristics for the 10-V option. Below this current, reverse breakdown voltage may deviate beyond the ±0.1% A-grade tolerance. The LM4050AEM3X-10 must be biased above this threshold in all operating conditions.
Does LM4050AEM3X-10 require an external output capacitor?
No, the LM4050AEM3X-10 does not require an external output capacitor for stability. Its internal design ensures unconditional stability with any capacitive load, including zero capacitance. This is explicitly stated in the Features section and validated in the Functional Block Diagram and Application Information sections of the TI datasheet. Adding capacitance does not degrade performance but is unnecessary for basic operation of the LM4050AEM3X-10.
What is the temperature coefficient specification for LM4050AEM3X-10?
The LM4050AEM3X-10 has a maximum average temperature coefficient of 50 ppm/°C over the full industrial temperature range (−40°C to 125°C). This value is specified in the Key Specifications table and confirmed in Section 6.10 (Electrical Characteristics: 10-V Option) of the TI datasheet. At 25°C, the typical TC is ±20 ppm/°C, but the guaranteed worst-case is 50 ppm/°C across temperature extremes for the A-grade device.
Is LM4050AEM3X-10 qualified for automotive applications?
The LM4050AEM3X-10 is not AEC-Q100 qualified. Only the LM4050-N-Q1 variant (e.g., LM4050QAIM3X-10) carries AEC-Q100 Grade 1 qualification. The LM4050AEM3X-10 belongs to the industrial-grade LM4050-N family and is rated for −40°C to 125°C operation but lacks automotive-specific stress testing and documentation. For automotive use, specify the Q1 suffix version of the LM4050AEM3X-10.
What is the wideband noise performance of LM4050AEM3X-10?
The LM4050AEM3X-10 exhibits 150 μVrms wideband noise over the 10 Hz to 10 kHz bandwidth, as measured at 150 μA operating current (Section 6.10, Electrical Characteristics: 10-V Option). This noise level is typical for the 10 V variant and is higher than lower-voltage versions due to inherent Zener noise scaling. It is sufficient for 16-bit precision systems but may require filtering for 18-bit+ applications.
LM4050AEM3X-10 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:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 10V
- 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:
- 110 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050AEM3X-10 FAQ
1.How can I place an order for LM4050AEM3X-10 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AEM3X-10 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-10 reliable?
The price and inventory of LM4050AEM3X-10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050AEM3X-10 is usually 5 days.
3.What payment methods are accepted for LM4050AEM3X-10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AEM3X-10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AEM3X-10?
LM4050AEM3X-10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AEM3X-10 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-10?
For technical support, including LM4050AEM3X-10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AEM3X-10 requirements.
6.How does Aetrix verify that LM4050AEM3X-10 is sourced from the original manufacturer or authorized distributors?
All LM4050AEM3X-10 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-10 meets industry standards.
7.What is the process for return or replacement of LM4050AEM3X-10?
All LM4050AEM3X-10 units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AEM3X-10, 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-10 part is unused and in its original packaging.
Return procedure for LM4050AEM3X-10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050AEM3X-10 Tags
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