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Texas Instruments LM4050QCEM3-8.2/NOPB
- Part No.:
- LM4050QCEM3-8.2/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QCEM3-8.2/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,668
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Product details
Overview
LM4050QCEM3-8.2/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering 8.192 V nominal reverse breakdown voltage with ±0.5% initial tolerance (C grade), 50 ppm/°C max temperature coefficient, and 150 μVrms wideband noise (10 Hz–10 kHz) at 150 μA operating current. It operates from −40°C to 125°C and serves as a stable reference in high-resolution ADC/DAC biasing and automotive sensor signal conditioning.
For engineers reviewing the LM4050QCEM3-8.2/NOPB datasheet, LM4050QCEM3-8.2/NOPB pinout, LM4050QCEM3-8.2/NOPB application, or LM4050QCEM3-8.2/NOPB equivalent, key selection criteria include its fixed 8.192 V output optimized for 12-bit systems (2 mV/LSB with ≥10 V supply), no-output-capacitor stability, capacitive load tolerance, and AEC-Q100 Grade 1 qualification for automotive use.
Technical Context
The LM4050QCEM3-8.2/NOPB implements a curvature-corrected bandgap shunt architecture with Zener-zap trim for voltage accuracy, enabling stable regulation without external compensation. Its internal dynamic impedance is 0.6 Ω at 1 mA, supporting low-load-regulation error across 74–100 μA minimum operating current (25°C to 125°C).
As an AEC-Q100 Grade 1 qualified device, it meets automotive reliability requirements including thermal hysteresis ≤2.3 mV after −40°C/125°C cycling and long-term stability of 120 ppm over 1000 hours. It functions exclusively in closed-loop shunt mode with fixed output-no external feedback or adjustment possible.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 8.192 V nominal at 150 μA - enables exact 2 mV LSB resolution for 12-bit converters with ≥10 V supplies |
| Initial Tolerance | ±0.5% (C grade) at 25°C - supports cost-sensitive precision applications where ±5 mV absolute accuracy suffices |
| Temp Coefficient | ≤50 ppm/°C over −40°C to 125°C - ensures <±0.42% total drift across full automotive range |
| Operating Current | 74–100 μA min (25°C to 125°C), up to 15 mA max - allows ultra-low-power operation while sustaining regulation under load transients |
| Noise (10 Hz–10 kHz) | 150 μVrms at 150 μA - limits added uncertainty to <0.02% of full-scale in 12-bit measurement systems |
| Dynamic Impedance | 0.6 Ω at 1 mA, 120 Hz - minimizes output voltage shift under varying load current (ΔV ≤ 18 mV over 0–15 mA range) |
| Thermal Hysteresis | 2.3 mV after −40°C/125°C cycling - defines repeatability error when ambient temperature cycles in vehicle ECUs |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, surface-mount, 3-pin configuration with exposed die attach pad not connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / reference voltage node | Carries total cathode current (IQ + IL); voltage regulated between this pin and Anode |
| Anode (Pin 2) | Reference ground / common return | Must be connected to system ground; forms the 0 V reference point for 8.192 V output |
| NC (Pin 3) | No internal connection | Must be left floating or tied to Pin 2 (Anode); prevents EMI coupling in noisy automotive environments |
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 cap |
| AEC-Q100 Grade 1 qualified | Validated for automotive operation from −40°C to 125°C with lifetime reliability testing - suitable for engine control and ADAS modules |
| Fixed 8.192 V output | Matches 12-bit converter full-scale with 2 mV/LSB resolution when supplied ≥10 V - removes resistor-divider design effort |
| Low micropower operation | 74 μA minimum cathode current at 25°C - enables battery-backed sensor nodes with multi-year runtime |
| Tolerates capacitive loads | Stable with >100 nF output capacitance - supports direct decoupling of downstream op-amps or ADCs without phase-margin risk |
Applications
| Automotive Sensor Signal Conditioning | Precision 12-Bit Data Acquisition |
|---|---|
Use Scenario: Front-end reference for pressure, temperature, and position sensors in engine control units and battery management systems. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 8.192 V bias to sensor signal chains and analog front-ends. Use Value: Enables <±0.02% measurement accuracy over −40°C to 125°C, meeting ASIL-B functional safety requirements for sensor calibration. | Use Scenario: Reference source for 12-bit SAR ADCs in industrial process controllers and energy metering ICs. IC Role / Device Role / Timing Role: Precision shunt reference setting full-scale input range for analog-to-digital conversion. Use Value: Delivers exact 2 mV/LSB resolution with <150 μVrms noise, eliminating need for post-conversion digital correction. |
| High-Voltage Bounded Amplifier Clamping | Automotive Infotainment Audio Biasing |
Use Scenario: Output voltage clamping in op-amp circuits protecting downstream components from overvoltage transients. IC Role / Device Role / Timing Role: Shunt reference used in parallel with diodes to define precise ±11.5 V clipping threshold. Use Value: Provides repeatable clamping within ±2.3 mV hysteresis, preventing amplifier saturation and reducing recovery delay in feedback loops. | Use Scenario: DC bias generation for Class AB audio amplifiers and DAC output buffers in vehicle head units. IC Role / Device Role / Timing Role: Stable 8.192 V reference for rail-splitting and offset nulling networks. Use Value: Reduces audible distortion by minimizing reference drift-induced DC offset shifts during cabin temperature swings. |
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%, SOT-23, but industrial-grade only (−40°C to 85°C), higher 200 μVrms noise | Not qualified for automotive under-hood use; limited to cabin infotainment or non-safety industrial systems | Select when AEC-Q100 qualification is unnecessary and cost is primary driver |
| MAX6008AEUR+T | 8.192 V, ±0.2%, SOT-23, 75 μVrms noise, but no AEC-Q100 rating and 100 μA min operating current | Better noise and tighter initial tolerance, but unqualified for automotive; requires higher minimum current | Select for high-precision test equipment where noise matters more than automotive compliance |
Compared with LM4050QCEM3-8.2/NOPB, LM4040C82IDCKR offers identical voltage and tolerance but lacks automotive qualification and has higher noise, while MAX6008AEUR+T improves noise and accuracy but sacrifices AEC-Q100 compliance and increases minimum current requirement-making LM4050QCEM3-8.2/NOPB the optimal choice for cost-constrained, thermally demanding automotive applications requiring proven reliability.
Availability
LM4050QCEM3-8.2/NOPB is available at Aetrix Electronics and suitable for automotive electronics, precision data acquisition, and industrial sensor signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4050QCEM3-8.2/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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and automotive electronics.
The LM4050-N product line delivers micropower shunt voltage references optimized for space-constrained, high-accuracy applications in automotive, industrial, and instrumentation systems-designed to replace discrete Zener solutions with superior stability and qualification.
FAQ
What is the output voltage tolerance of LM4050QCEM3-8.2/NOPB at 25°C?
The LM4050QCEM3-8.2/NOPB has a ±0.5% initial output voltage tolerance at 25°C (C grade), corresponding to ±41 mV around the nominal 8.192 V reverse breakdown voltage. This tolerance is verified at wafer sort using Zener-zap trimming and applies specifically to the LM4050QCEM3-8.2/NOPB variant per TI's SNOS455H datasheet Section 5.9.
Does LM4050QCEM3-8.2/NOPB require an external output capacitor?
No, LM4050QCEM3-8.2/NOPB does not require an external output capacitor due to internal compensation. It remains stable with any capacitive load-including >100 nF ceramic or tantalum types-eliminating the need for external stabilization components in designs like ADC reference buffers or op-amp bias networks.
What is the minimum operating current for LM4050QCEM3-8.2/NOPB over temperature?
The LM4050QCEM3-8.2/NOPB requires a minimum cathode current of 74 μA at 25°C, increasing to 100 μA across the full −40°C to 125°C operating range. This value is specified in Section 5.9 of the datasheet and must be maintained to ensure regulation accuracy and thermal stability in automotive under-hood applications.
Is LM4050QCEM3-8.2/NOPB qualified for automotive use?
Yes, LM4050QCEM3-8.2/NOPB is AEC-Q100 Grade 1 qualified, rated for operation from −40°C to 125°C and validated for automotive reliability including thermal cycling, humidity, and lifetime stress testing. Its Q1 suffix explicitly denotes automotive-grade manufacturing flow and qualification per TI's official documentation.
What is the wideband noise performance of LM4050QCEM3-8.2/NOPB?
The LM4050QCEM3-8.2/NOPB exhibits 150 μVrms wideband noise over 10 Hz to 10 kHz at 150 μA operating current, as measured per Section 5.9 of the datasheet. This noise level contributes <0.02% of full-scale error in 12-bit systems using 8.192 V reference, making it suitable for high-fidelity sensor signal chains and precision metrology.
LM4050QCEM3-8.2/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:
- ±0.5%
- 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
LM4050QCEM3-8.2/NOPB FAQ
1.How can I place an order for LM4050QCEM3-8.2/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QCEM3-8.2/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 LM4050QCEM3-8.2/NOPB reliable?
The price and inventory of LM4050QCEM3-8.2/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QCEM3-8.2/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QCEM3-8.2/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QCEM3-8.2/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QCEM3-8.2/NOPB?
LM4050QCEM3-8.2/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QCEM3-8.2/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 LM4050QCEM3-8.2/NOPB?
For technical support, including LM4050QCEM3-8.2/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QCEM3-8.2/NOPB requirements.
6.How does Aetrix verify that LM4050QCEM3-8.2/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QCEM3-8.2/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 LM4050QCEM3-8.2/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QCEM3-8.2/NOPB?
All LM4050QCEM3-8.2/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QCEM3-8.2/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 LM4050QCEM3-8.2/NOPB part is unused and in its original packaging.
Return procedure for LM4050QCEM3-8.2/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050QCEM3-8.2/NOPB Tags
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