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Texas Instruments LM4050AEM3-10
- Part No.:
- LM4050AEM3-10
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050AEM3-10.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,752
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Product details
Overview
LM4050AEM3-10 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 data acquisition systems.
For engineers reviewing the LM4050AEM3-10 datasheet, LM4050AEM3-10 pinout, LM4050AEM3-10 application, or LM4050AEM3-10 equivalent, key selection criteria include output voltage accuracy over temperature, low dynamic impedance (0.7 Ω at 1 mA), wide operating current range (100 μA to 15 mA), absence of required output capacitor, and SOT-23 package compatibility with high-density PCB layouts.
Technical Context
The LM4050AEM3-10 uses bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation. Its reverse breakdown voltage is factory-trimmed via fuse and Zener-zap methods during wafer sort to guarantee ±0.1% accuracy at 25°C.
It exhibits low dynamic impedance (0.7 Ω typical at 1 mA, 120 Hz), tolerates capacitive loads without external stabilization, and maintains stability across 100 μA–15 mA operating current. Thermal hysteresis is 2.8 mV over −40°C to 125°C cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 10 V nominal reverse breakdown voltage at 150 μA test current |
| Initial Tolerance | ±0.1% maximum at 25°C (A-grade specification) |
| Temp Coefficient | 50 ppm/°C maximum over −40°C to 125°C |
| Min Operating Current | 100 μA - sets lower bound for stable regulation |
| Dynamic Impedance | 0.7 Ω typical at 1 mA, 120 Hz - ensures low load regulation error |
| Wideband Noise | 150 μVrms (10 Hz–10 kHz) - impacts high-resolution ADC reference performance |
| Long-Term Stability | 120 ppm over 1000 hours - critical for calibration-critical instrumentation |
Pinout & Package
SOT-23 (DBZ) package: 3-pin surface-mount, 2.92 mm × 1.30 mm body size, JEDEC standard footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / reference voltage node | Connects to regulated voltage rail; sinks current to maintain 10 V across anode–cathode |
| Anode (Pin 2) | Common return / ground reference | Must be connected to system ground; defines reference potential for cathode voltage |
| NC (Pin 3) | No internal connection | Left floating per datasheet; no electrical function or thermal role |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct integration into compact, low-BOM-count reference circuits without stability risk |
| Tolerates capacitive loads | Supports direct buffering with op-amps or driving ADC sample capacitors without oscillation |
| Fixed 10 V breakdown option | Eliminates external resistor network for 10 V reference generation in precision power supplies |
| Industrial & extended temp range | Validated operation from −40°C to 125°C supports automotive and industrial control applications |
| Low 100 μA start-up current | Extends battery life in portable instrumentation and wireless sensor nodes |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeters and battery-powered calibrators requiring stable 10 V reference under varying load and temperature. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 10 V基准 for ADC front-end scaling and DAC output calibration. Use Value: ±0.1% initial tolerance and 50 ppm/°C TC ensure <±0.5% total error over full temperature range without trimming. |
Use Scenario: 16-bit+ data loggers acquiring analog sensor signals in factory automation environments. IC Role / Device Role / Timing Role: Primary reference source for successive-approximation ADCs and programmable gain instrumentation amplifiers. Use Value: 150 μVrms noise floor and 0.7 Ω dynamic impedance minimize code spread and improve effective resolution. |
| Energy Management Units | Precision Audio Components |
Use Scenario: Smart metering modules measuring grid voltage/current with metrology-grade accuracy. IC Role / Device Role / Timing Role: Reference for isolated sigma-delta ADCs monitoring AC mains with anti-aliasing filtering. Use Value: 120 ppm long-term stability enables >10-year calibration intervals without field recalibration. |
Use Scenario: High-fidelity DAC-based audio line drivers requiring ultra-low-noise DC bias references. IC Role / Device Role / Timing Role: Low-noise 10 V reference for op-amp biasing and analog output stage level-setting. Use Value: Capacitive-load tolerance allows direct connection to op-amp non-inverting inputs without phase margin loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5010IDBZR | Series reference (not shunt); 10 V output; 3 ppm/°C TC; requires input voltage ≥11.5 V | Higher accuracy but needs higher supply headroom; unsuitable for low-voltage or sinking-current topologies | Select when ultra-low drift and series topology are acceptable; avoid if circuit relies on shunt configuration or ≤10.5 V supply |
| TL431CDBZR | Adjustable shunt reference; 2.5 V base; requires two external resistors for 10 V; ±1% initial tolerance; 50 ppm/°C TC | Lower cost but reduced accuracy and higher noise (200 μVrms); lacks guaranteed 10 V factory-trimmed option | Choose for cost-sensitive, non-critical 10 V references where ±1% tolerance is acceptable and resistor layout area is available |
Compared with REF5010IDBZR and TL431CDBZR, the LM4050AEM3-10 provides factory-trimmed 10 V output with shunt topology, enabling direct replacement in existing low-headroom designs without resistor networks or supply voltage increase - critical for retrofitting legacy instrumentation.
Availability
LM4050AEM3-10 is available at Aetrix Electronics and suitable for portable instrumentation, data acquisition systems, and energy management units requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LM4050AEM3-10 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and consumer markets since 1930.
The LM4050-N product line delivers precision micropower shunt voltage references optimized for space-constrained, battery-operated, and high-accuracy measurement systems - emphasizing factory-trimmed voltage accuracy, low quiescent current, and robust thermal performance.
FAQ
What is the minimum operating current for LM4050AEM3-10?
The LM4050AEM3-10 requires a minimum operating current of 100 μA to maintain regulation within specifications. This value is confirmed in Section 6.10 of the SNOS455G datasheet under "Minimum Operating Current" for the 10-V option. Below this threshold, the device may not sustain stable 10 V output, especially across temperature extremes. Designers must ensure the external current source or resistor network delivers ≥100 μA under all operating conditions for reliable LM4050AEM3-10 performance.
Does LM4050AEM3-10 require an output capacitor?
No, the LM4050AEM3-10 does not require an output capacitor for stability. Its internal design eliminates the need for external capacitance, as stated in the "Features" section of the datasheet. It remains stable with any capacitive load - including ADC input capacitors or op-amp inputs - making it ideal for compact, low-component-count reference circuits where board space is constrained. This behavior is intrinsic to the LM4050AEM3-10's architecture and verified across its full operating current range.
What is the temperature coefficient of LM4050AEM3-10?
The LM4050AEM3-10 has a maximum temperature coefficient of 50 ppm/°C over the full operating range of −40°C to 125°C. This value is specified in the "Key Specifications" table and confirmed in Section 6.10 under "Average reverse breakdown voltage temperature coefficient." It reflects the worst-case drift relative to the 10 V nominal output, ensuring predictable voltage variation in thermally demanding environments such as automotive engine control units or industrial PLCs using the LM4050AEM3-10.
Is LM4050AEM3-10 suitable for automotive applications?
The LM4050AEM3-10 is rated for extended temperature operation up to 125°C and meets industrial reliability standards, but it is not AEC-Q100 qualified. For automotive applications, TI offers the LM4050-N-Q1 variant (e.g., LM4050QAIM3-10), which is AEC-Q100 Grade 1 qualified. The LM4050AEM3-10 itself is intended for industrial and commercial use; using it in automotive contexts requires independent qualification per OEM requirements and is not supported by TI's automotive flow certification for the LM4050AEM3-10 part number.
What is the dynamic impedance of LM4050AEM3-10?
The LM4050AEM3-10 has a typical reverse dynamic impedance of 0.7 Ω at 1 mA and 120 Hz, as specified in Section 6.10 of the SNOS455G datasheet. This low impedance directly determines load regulation performance: for example, a 1 mA change in shunt current causes only ~0.7 mV output shift. This characteristic makes the LM4050AEM3-10 highly effective in precision applications where output voltage must remain stable despite varying sink currents - a key advantage over higher-impedance alternatives.
LM4050AEM3-10 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
LM4050AEM3-10 FAQ
1.How can I place an order for LM4050AEM3-10 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AEM3-10 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 LM4050AEM3-10 reliable?
The price and inventory of LM4050AEM3-10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050AEM3-10 is usually 5 days.
3.What payment methods are accepted for LM4050AEM3-10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AEM3-10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AEM3-10?
LM4050AEM3-10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AEM3-10 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 LM4050AEM3-10?
For technical support, including LM4050AEM3-10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AEM3-10 requirements.
6.How does Aetrix verify that LM4050AEM3-10 is sourced from the original manufacturer or authorized distributors?
All LM4050AEM3-10 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 LM4050AEM3-10 meets industry standards.
7.What is the process for return or replacement of LM4050AEM3-10?
All LM4050AEM3-10 units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AEM3-10, 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 LM4050AEM3-10 part is unused and in its original packaging.
Return procedure for LM4050AEM3-10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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