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Texas Instruments LM4050QBEM3-8.2/NOPB
- Part No.:
- LM4050QBEM3-8.2/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QBEM3-8.2/NOPB.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,855
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Product details
Overview
LM4050QBEM3-8.2/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a fixed 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 over −40°C to 125°C and requires no output capacitor-enabling stable regulation in battery-powered data-acquisition systems and high-resolution ADC references.
For engineers reviewing the LM4050QBEM3-8.2/NOPB datasheet, LM4050QBEM3-8.2/NOPB pinout, LM4050QBEM3-8.2/NOPB application, or LM4050QBEM3-8.2/NOPB equivalent, key selection criteria include its 8.192 V output for 12-bit DAC/ADC LSB alignment, low thermal hysteresis (2.3 mV), micropower operation down to 74 μA, and AEC-Q100 Grade 1 qualification for automotive use.
Technical Context
The LM4050QBEM3-8.2/NOPB implements a curvature-corrected bandgap shunt reference architecture with Zener-zap trim at wafer sort, ensuring ±0.1% accuracy at 25°C. Its internal compensation eliminates external capacitor requirements while maintaining stability across capacitive loads.
It functions as a two-terminal device: cathode regulates voltage relative to anode (ground), with current-sourced operation requiring an external series resistor (RS). Minimum operating current is 74 μA (typical) at 25°C, rising to 100 μA over full −40°C to 125°C range; dynamic impedance is 0.6 Ω at 1 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 8.192 V nominal reverse breakdown voltage - enables exact 2 mV/LSB scaling for 12-bit converters operating from ≥10 V supplies. |
| Initial Tolerance | ±0.1% at 25°C (A-grade) - supports high-accuracy calibration without trimming in production test. |
| Temp Coefficient | ≤50 ppm/°C over −40°C to 125°C - ensures ≤±0.492 V total drift across full industrial+extended range. |
| Noise (10 Hz–10 kHz) | 150 μVrms at 150 μA - limits added uncertainty to <0.02% of full-scale in precision measurement front-ends. |
| Operating Current | 74 μA to 15 mA - allows ultra-low-power sensor nodes (<100 μA standby) and robust regulation under heavy load transients. |
| Thermal Hysteresis | 2.3 mV after −40°C ↔ 125°C cycling - defines repeatability error in systems subject to thermal cycling. |
| Dynamic Impedance | 0.6 Ω at 1 mA, 120 Hz - maintains tight regulation during fast load current steps in closed-loop feedback paths. |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, 3-pin surface-mount configuration. Pin 3 is NC (no internal connection) and must be left floating or tied to pin 2 per TI layout guidance for EMI-sensitive applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / regulated voltage node | Connects to supply via RS; voltage referenced to anode; carries all load + reference current. |
| Anode (Pin 2) | Ground reference / common return | Must be connected to system ground; serves as voltage reference point for VOUT. |
| NC (Pin 3) | No internal connection | Leave unconnected or tie to pin 2 only in high-EMI environments; not used for regulation or biasing. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Internally compensated for stability with any capacitive load - eliminates BOM cost and layout area for bypass caps. |
| Fixed 8.192 V output | Enables exact 2 mV/LSB resolution for 12-bit converters on ≥10 V rails - avoids resistor-divider errors and drift. |
| AEC-Q100 Grade 1 qualified | Rated for −40°C to 125°C operation with automotive flow manufacturing - suitable for engine control, ADAS sensors. |
| Low micropower start-up | Regulates stably from 74 μA (typical) - supports energy harvesting and coin-cell-powered instrumentation. |
| Low thermal hysteresis | 2.3 mV post-cycle shift - preserves calibration integrity in field-deployed equipment undergoing ambient temperature swings. |
Applications
| Battery-Powered Data Loggers | Automotive Sensor Signal Conditioning |
|---|---|
Use Scenario: Portable environmental monitor logging temperature, humidity, and pressure using 12-bit SAR ADCs powered by Li-SOCl₂ cells. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 8.192 V reference to ADC and analog front-end op-amps. Use Value: Enables 2 mV/LSB resolution without trimming; 74 μA minimum current extends 10-year battery life; no capacitor reduces PCB area by 0.5 mm². |
Use Scenario: Exhaust gas oxygen (EGO) sensor interface in Tier-1 powertrain module operating at 125°C under hood. IC Role / Device Role / Timing Role: Precision reference for ratiometric signal conditioning amplifier feeding engine control unit ADC. Use Value: AEC-Q100 Grade 1 rating ensures reliability; 50 ppm/°C TC and 2.3 mV hysteresis maintain <0.1% total error across thermal cycles. |
| Industrial Process Transmitters | Energy Metering Reference |
Use Scenario: 4–20 mA loop-powered pressure transmitter with HART modulation, housed in IP67 enclosure. IC Role / Device Role / Timing Role: Primary voltage reference for DAC generating analog output and for internal ADC monitoring supply rail. Use Value: Stable 8.192 V output ensures 0.05% span accuracy over −40°C to 85°C; 15 mA max current supports HART comms bursts. |
Use Scenario: Class 0.2 polyphase electricity meter using 24-bit sigma-delta ADCs for revenue-grade kWh measurement. IC Role / Device Role / Timing Role: Secondary reference for ADC gain calibration and anti-aliasing filter biasing. Use Value: 150 μVrms noise contributes <0.002% of full-scale error; long-term stability of 120 ppm/1000 hrs maintains metrology certification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040C82IDCKR | 8.192 V, ±0.5% initial tolerance, 100 ppm/°C max TC, SOT-23, no AEC-Q100 qualification | Lower accuracy and higher drift - suitable for non-critical industrial controls but not automotive or metrology | Select when cost sensitivity outweighs accuracy and qualification requirements; verify thermal drift impact on system error budget. |
| REF5082IDR | 8.2 V, ±0.05% initial tolerance, 3 ppm/°C max TC, SOIC-8, series topology, 10 mA max load | Higher accuracy, lower drift, but larger package and series architecture - requires different biasing and cannot sink current | Choose for lab-grade instrumentation where 0.05% tolerance and ultra-low TC justify SOIC footprint and design rework. |
Compared with LM4040C82IDCKR, LM4050QBEM3-8.2/NOPB delivers 5× tighter initial tolerance and half the tempco, enabling automotive use; versus REF5082IDR, it offers smaller SOT-23 size and shunt flexibility but trades 6× higher noise and looser long-term stability.
Availability
LM4050QBEM3-8.2/NOPB is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive sensor modules, industrial process transmitters, and energy metering systems requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4050QBEM3-8.2/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 and embedded processing technologies, with over 50 years of innovation in precision analog ICs and automotive-grade components.
The LM4050-N product line delivers micropower shunt voltage references optimized for space-constrained, high-accuracy applications including portable test equipment, automotive sensors, and industrial IoT edge nodes-prioritizing low drift, low noise, and qualification for harsh environments.
FAQ
What is the output voltage tolerance of LM4050QBEM3-8.2/NOPB at 25°C?
The LM4050QBEM3-8.2/NOPB has a ±0.1% initial output voltage tolerance at 25°C (A-grade specification), corresponding to ±8.192 mV around the nominal 8.192 V reverse breakdown voltage. This tolerance is verified at wafer sort using fuse and Zener-zap trimming, and applies specifically to the LM4050QBEM3-8.2/NOPB variant per TI's SNOS455H datasheet Section 5.9.
Does LM4050QBEM3-8.2/NOPB require an external output capacitor?
No, LM4050QBEM3-8.2/NOPB does not require an external output capacitor due to internal compensation. It remains stable with any capacitive load-including ADC input capacitance or PCB trace capacitance-eliminating the need for a dedicated bypass capacitor. This is confirmed in the "Features" and "Description" sections of the official TI datasheet.
What is the minimum operating current for LM4050QBEM3-8.2/NOPB over temperature?
The LM4050QBEM3-8.2/NOPB requires a minimum operating current of 74 μA (typical) at 25°C, increasing to 100 μA maximum over the full −40°C to 125°C extended temperature range. This value is specified in Section 5.9 "Electrical Characteristics: 8.2V Option" of the TI datasheet and is critical for maintaining regulation under cold-start or low-power conditions.
Is LM4050QBEM3-8.2/NOPB qualified for automotive applications?
Yes, LM4050QBEM3-8.2/NOPB is AEC-Q100 Grade 1 qualified (−40°C to 125°C), manufactured on an automotive-grade flow, and explicitly designated as LM4050-N-Q1 in TI documentation. This qualification covers stress testing, reliability validation, and process controls required for safety-critical automotive subsystems such as engine management and ADAS sensors.
How does thermal hysteresis affect LM4050QBEM3-8.2/NOPB performance?
LM4050QBEM3-8.2/NOPB exhibits 2.3 mV thermal hysteresis-the voltage shift measured at 25°C after cycling between −40°C and 125°C. This mechanical stress-induced offset impacts calibration repeatability in field-deployed equipment but is fully characterized and bounded in TI's datasheet Section 5.9, enabling system-level error budgeting.
LM4050QBEM3-8.2/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:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 8.192V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050QBEM3-8.2/NOPB FAQ
1.How can I place an order for LM4050QBEM3-8.2/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QBEM3-8.2/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 LM4050QBEM3-8.2/NOPB reliable?
The price and inventory of LM4050QBEM3-8.2/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QBEM3-8.2/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QBEM3-8.2/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QBEM3-8.2/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QBEM3-8.2/NOPB?
LM4050QBEM3-8.2/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QBEM3-8.2/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 LM4050QBEM3-8.2/NOPB?
For technical support, including LM4050QBEM3-8.2/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QBEM3-8.2/NOPB requirements.
6.How does Aetrix verify that LM4050QBEM3-8.2/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QBEM3-8.2/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 LM4050QBEM3-8.2/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QBEM3-8.2/NOPB?
All LM4050QBEM3-8.2/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QBEM3-8.2/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 LM4050QBEM3-8.2/NOPB part is unused and in its original packaging.
Return procedure for LM4050QBEM3-8.2/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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