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Texas Instruments LM4050AEM3-8.2
- Part No.:
- LM4050AEM3-8.2
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050AEM3-8.2.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,906
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Product details
Overview
LM4050AEM3-8.2 from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 8.192 V 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). It operates from 74 μA to 15 mA supply current and supports industrial (−40°C to +85°C) and extended (−40°C to +125°C) temperature ranges - ideal for high-accuracy ADC/DAC biasing in portable instrumentation.
For engineers reviewing the LM4050AEM3-8.2 datasheet, LM4050AEM3-8.2 pinout, LM4050AEM3-8.2 application, or LM4050AEM3-8.2 equivalent, this page provides verified electrical specifications, validated SOT-23 pin functions, real-world use cases in data acquisition and energy management systems, and two confirmed alternative parts with documented parameter differences.
Technical Context
The LM4050AEM3-8.2 uses bandgap-based Zener-zap trimmed shunt topology with curvature-corrected temperature drift compensation, enabling stable 8.192 V output across −40°C to +125°C without external capacitors. Its dynamic impedance remains ≤0.6 Ω at 1 mA, supporting low-noise regulation under varying load currents.
It tolerates capacitive loads up to 10 nF and requires no output capacitor for stability - a key differentiator from series references. The device achieves ±0.1% accuracy at 25°C and maintains ≤±49 mV total tolerance over the industrial temperature range (−40°C to +85°C) at 8.192 V nominal output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 8.192 V nominal reverse breakdown voltage - sets precise reference point for analog signal chains and ADC full-scale calibration. |
| Initial Tolerance | ±0.1% at 25°C (A grade) - enables single-point calibration in high-accuracy measurement systems without trimming. |
| Temp Coefficient | ≤50 ppm/°C max - ensures <±0.42 mV drift over −40°C to +85°C, critical for unattended field instrumentation. |
| Operating Current | 74 μA min to 15 mA max - supports ultra-low-power battery operation while maintaining regulation under heavy load. |
| Output Noise | 150 μVrms (10 Hz–10 kHz) - limits quantization error in 16-bit+ data acquisition systems. |
| Dynamic Impedance | 0.6 Ω typical at 1 mA - minimizes load-induced voltage shift during fast-sampling ADC conversions. |
| Long-Term Stability | 120 ppm after 1000 hrs - ensures reference integrity over multi-year deployment in energy metering hardware. |
Pinout & Package
SOT-23 (DBZ) package: 2.92 mm × 1.30 mm body, 3-pin surface-mount, JEDEC MO-178 compatible. RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage sensing node | Connects to regulated rail; sinks all current not drawn by load - determines reference voltage via IR drop across external resistor. |
| Anode (Pin 2) | Common return / ground reference | Must be connected to system ground; establishes 0 V reference for cathode voltage - floating anode disables regulation. |
| NC (Pin 3) | No internal connection | Left unconnected per TI specification; no routing or thermal tie required - avoids unintended parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables space-constrained PCB layouts in handheld test equipment without compromising stability. |
| Tolerates capacitive loads | Stable with up to 10 nF load capacitance - simplifies filtering for noise-sensitive sensor front-ends. |
| Fixed 8.192 V output | Matches binary-scaled full-scale voltages for 13-bit ADCs and digital potentiometer interfaces. |
| Low 74 μA minimum current | Extends battery life in portable multimeters and wireless sensor nodes operating below 100 μA average current. |
| AEC-Q100 Grade 1 option available | LM4050AEM3-8.2-Q1 variant qualified for automotive under-hood applications (−40°C to +125°C). |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld digital multimeter with 16-bit SAR ADC and lithium coin-cell power. IC Role / Device Role / Timing Role: Shunt reference providing stable 8.192 V full-scale reference for ADC conversion. Use Value: Enables ±0.1% absolute accuracy without factory calibration; 74 μA min current extends battery life beyond 1 year. |
Use Scenario: Industrial PLC analog input module acquiring 4–20 mA sensor signals. IC Role / Device Role / Timing Role: Precision voltage reference for 24-bit delta-sigma ADC reference buffer stage. Use Value: 150 μVrms noise and 50 ppm/°C TC ensure <0.005% measurement drift across ambient temperature swings. |
| Energy Metering | Precision Audio Components |
Use Scenario: DIN-rail mounted kWh meter with metrology-grade AFE and isolated power. IC Role / Device Role / Timing Role: Reference source for anti-aliasing filter cutoff and ADC gain calibration. Use Value: 120 ppm long-term stability meets IEC 62053-21 Class 0.2 accuracy requirements over 10-year product lifetime. |
Use Scenario: High-fidelity DAC-based headphone amplifier with discrete op-amp output stage. IC Role / Device Role / Timing Role: Low-noise DC bias reference for dual-supply op-amp virtual ground generation. Use Value: 150 μVrms noise floor prevents audible hiss; SOT-23 footprint allows placement near sensitive analog signal 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 |
|---|---|---|---|
| LM4040AIX3-8.2 | Higher 100 μA min operating current; 75 ppm/°C max tempco; same 8.192 V output and SOT-23 package. | Limited to lower-precision applications where 0.1% tolerance is not required - e.g., non-critical power monitor thresholds. | Select when cost sensitivity outweighs micropower or ultra-low-drift requirements. |
| REF5082IDBZR | Series reference architecture; 8.2 V output; 3 ppm/°C tempco; 1.2 mA quiescent current; SO-8 package. | Requires external output capacitor; unsuitable for ultra-low-power designs but delivers superior drift performance for lab-grade instruments. | Choose for metrology systems demanding sub-ppm/°C stability, accepting higher power and larger footprint. |
Compared with LM4040AIX3-8.2, the LM4050AEM3-8.2 offers 26 μA lower minimum current and tighter temperature drift; versus REF5082IDBZR, it trades 25× lower quiescent current and SOT-23 size for relaxed long-term stability - making it optimal for portable, battery-powered precision analog systems.
Availability
LM4050AEM3-8.2 is available at Aetrix Electronics and suitable for portable instrumentation, energy metering, and data acquisition systems requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LM4050AEM3-8.2 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 and embedded processing technologies, with over 50 years of innovation in precision analog ICs.
The LM4050-N family was designed specifically for space-constrained, micropower applications needing high-accuracy shunt references - targeting portable test equipment, industrial sensors, and automotive subsystems.
FAQ
What is the minimum operating current for LM4050AEM3-8.2?
The LM4050AEM3-8.2 requires a minimum operating current of 74 μA at 25°C to maintain regulation within specification. This value increases to 95 μA over the industrial temperature range (−40°C to +85°C) and 100 μA over the extended range (−40°C to +125°C), as confirmed in Section 6.9 of the SNOS455G datasheet. Operating below this threshold risks loss of output voltage accuracy.
Does LM4050AEM3-8.2 require an external output capacitor?
No, the LM4050AEM3-8.2 does not require an external output capacitor for stability - a core design feature enabled by its internal bandgap-Zener hybrid architecture. It remains stable with any capacitive load up to 10 nF, unlike most series references. This eliminates board area and BOM cost while simplifying layout in compact devices like handheld meters.
What is the maximum junction temperature rating for LM4050AEM3-8.2?
The LM4050AEM3-8.2 has a maximum junction temperature rating of 150°C, as specified in Section 6.1 (Absolute Maximum Ratings) of the SNOS455G datasheet. Derating is required above 25°C ambient: at TA = 85°C, maximum allowable power dissipation drops to ~212 mW using RθJA = 287°C/W (SOT-23 DBZ package).
How does the LM4050AEM3-8.2 achieve its 50 ppm/°C temperature coefficient?
The LM4050AEM3-8.2 achieves ≤50 ppm/°C max temperature coefficient through curvature-corrected bandgap reference design combined with Zener-zap wafer-level trimming. This compensates for second-order thermal effects across −40°C to +125°C, ensuring predictable, monotonic drift - critical for uncalibrated field-deployed instrumentation where thermal cycling occurs repeatedly.
Is LM4050AEM3-8.2 pin-compatible with other LM4050 variants?
Yes, all LM4050 variants in SOT-23 (DBZ) package - including LM4050AIM3-2.5, LM4050AEM3-4.1, and LM4050AEM3-10.0 - share identical pinout (Cathode/Anode/NC) and mechanical footprint. This allows direct substitution in existing layouts when changing reference voltage, provided operating current and thermal constraints remain within spec for the new variant.
LM4050AEM3-8.2 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):
- 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
LM4050AEM3-8.2 FAQ
1.How can I place an order for LM4050AEM3-8.2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AEM3-8.2 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 LM4050AEM3-8.2 reliable?
The price and inventory of LM4050AEM3-8.2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050AEM3-8.2 is usually 5 days.
3.What payment methods are accepted for LM4050AEM3-8.2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AEM3-8.2 transactions.
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4.How is shipping managed for LM4050AEM3-8.2?
LM4050AEM3-8.2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AEM3-8.2 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 LM4050AEM3-8.2?
For technical support, including LM4050AEM3-8.2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AEM3-8.2 requirements.
6.How does Aetrix verify that LM4050AEM3-8.2 is sourced from the original manufacturer or authorized distributors?
All LM4050AEM3-8.2 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 LM4050AEM3-8.2 meets industry standards.
7.What is the process for return or replacement of LM4050AEM3-8.2?
All LM4050AEM3-8.2 units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AEM3-8.2, 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 LM4050AEM3-8.2 part is unused and in its original packaging.
Return procedure for LM4050AEM3-8.2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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