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Texas Instruments LM4050QCEM3-4.1/NOPB
- Part No.:
- LM4050QCEM3-4.1/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QCEM3-4.1/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,815
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Product details
Overview
LM4050QCEM3-4.1/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a fixed 4.096 V reverse breakdown voltage with ±0.5% initial tolerance (C grade), 50 ppm/°C max temperature coefficient, and 93 μVrms wideband noise (10 Hz–10 kHz). It operates from 52 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 automotive sensor interfaces.
For engineers reviewing the LM4050QCEM3-4.1/NOPB datasheet, LM4050QCEM3-4.1/NOPB pinout, LM4050QCEM3-4.1/NOPB application, or LM4050QCEM3-4.1/NOPB equivalent, key selection criteria include its 4.096 V output (ideal for 12-bit ADCs with 1 mV LSB), extended temperature range qualification, AEC-Q100 Grade 1 compliance, and low dynamic impedance (0.5 Ω at 1 mA).
Technical Context
The LM4050QCEM3-4.1/NOPB implements a curvature-corrected bandgap shunt reference architecture with internal Zener-zap voltage trim, enabling ±0.5% accuracy at 25°C and stable regulation across load current (52 μA–15 mA) and temperature (−40°C to 125°C). Its design eliminates external compensation while tolerating capacitive loads.
As a two-terminal device, it functions as a precision shunt regulator: cathode draws current to maintain 4.096 V between cathode and anode (grounded terminal), with dynamic impedance of 0.5 Ω and thermal hysteresis of 1.148 mV after −40°C/125°C cycling-critical for metrology-grade stability in energy metering and instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal reverse breakdown voltage-enables exact 1 mV LSB for 12-bit ADCs powered from 5 V rails. |
| Initial Tolerance | ±0.5% at 25°C (C grade)-specifies maximum deviation before temperature or aging effects. |
| Temp. Coefficient | ±50 ppm/°C max over −40°C to 125°C-limits voltage drift to ±0.25 mV/°C across full range. |
| Operating Current | 52–68 μA min (25°C), up to 15 mA max-supports ultra-low-power sensor nodes and high-current precision buffers. |
| Wideband Noise | 93 μVrms (10 Hz–10 kHz)-directly impacts effective resolution in high-accuracy analog front-ends. |
| Dynamic Impedance | 0.5 Ω at 1 mA, 120 Hz-ensures minimal load-induced voltage shift in varying current conditions. |
| Thermal Hysteresis | 1.148 mV-quantifies irreversible voltage shift after extreme temperature cycling, critical for field-reliable calibration. |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, surface-mount, three-terminal shunt configuration with exposed die attach pad not connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Input/Regulated node | Receives input current (IQ + IL) and sets regulated 4.096 V potential relative to anode; must be driven through series resistor RS. |
| Anode (Pin 2) | Reference ground | Common return path for load and reference current; electrically tied to system ground in all standard configurations. |
| NC (Pin 3) | No internal connection | Die attach interface contact-must remain floating or be tied to Pin 2 to prevent EMI-induced errors in noisy environments. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Internally compensated for stability with any capacitive load-reduces BOM count and PCB area in space-constrained designs. |
| Fixed 4.096 V output | Matches 12-bit ADC/DAC full-scale with exactly 1 mV per LSB when referenced to 5 V supply-eliminates trimming resistors. |
| AEC-Q100 Grade 1 qualified | Validated for automotive applications operating from −40°C to 125°C ambient-supports engine control, ADAS sensors, and infotainment power rails. |
| Low 52 μA minimum current | Enables operation from coin cells or energy-harvesting sources while maintaining regulation-extends battery life in portable instrumentation. |
| Curvature-corrected bandgap | Minimizes parabolic temperature drift-achieves ±50 ppm/°C max TC without external compensation networks. |
Applications
| Battery-Powered Data Acquisition | Automotive Sensor Signal Conditioning |
|---|---|
Use Scenario: Portable multimeter or handheld environmental sensor logging analog inputs via 12-bit SAR ADC. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 4.096 V reference rail for ADC conversion. Use Value: Enables true 1 mV LSB resolution without calibration drift over temperature or battery discharge. |
Use Scenario: Engine coolant temperature or exhaust gas oxygen sensor signal conditioning in powertrain control module. IC Role / Device Role / Timing Role: Precision reference for op-amp gain-setting and ADC bias in harsh under-hood environment. Use Value: Maintains <±0.5% accuracy across −40°C to 125°C and survives automotive EMI due to SOT-23 layout robustness. |
| Energy Metering Calibration | Industrial Process Controller Reference |
Use Scenario: Revenue-grade electricity meter requiring traceable voltage reference for metrological accuracy. IC Role / Device Role / Timing Role: Primary shunt reference for polyphase energy measurement ICs (e.g., ADE78xx series). Use Value: Delivers long-term stability (120 ppm @ 1000 hrs) and low thermal hysteresis (1.148 mV) to meet IEC 62053 standards. |
Use Scenario: PLC analog I/O module converting 4–20 mA loop signals with 16-bit DACs and precision amplifiers. IC Role / Device Role / Timing Role: Stable 4.096 V reference for DAC output scaling and current-loop transmitter biasing. Use Value: Supports 0.01% system accuracy over industrial temperature range with no external trimming components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040C41IDBZR | Same 4.096 V output, ±0.5% tolerance, but rated only for −40°C to 85°C industrial range-not AEC-Q100 qualified. | Lacks automotive qualification and extended temperature support; suitable for commercial industrial controllers but not under-hood use. | Select when cost sensitivity outweighs automotive qualification and extended temp requirement. |
| REF3040AIDBZR | Series reference (not shunt); 4.096 V, ±0.2% initial accuracy, higher 50 μA quiescent current, requires output capacitor. | Higher accuracy but incompatible topology-requires redesign of bias network and adds capacitor footprint. | Choose only if system already uses series references and board layout allows added capacitor and higher drive capability. |
Compared with LM4040C41IDBZR, LM4050QCEM3-4.1/NOPB adds AEC-Q100 Grade 1 and 125°C operation at same accuracy; versus REF3040AIDBZR, it offers shunt topology simplicity and capacitor-free operation but trades off initial tolerance for automotive robustness.
Availability
LM4050QCEM3-4.1/NOPB is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive sensor modules, energy metering, and industrial process controllers requiring stable component supply with guaranteed long-term availability.
Supply support for LM4050QCEM3-4.1/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-qualified components.
The LM4050-N/Q1 product line delivers micropower shunt voltage references optimized for space-constrained, high-accuracy applications including automotive sensors, portable test equipment, and smart grid infrastructure.
FAQ
What is the maximum operating current for LM4050QCEM3-4.1/NOPB?
The LM4050QCEM3-4.1/NOPB supports a maximum operating current of 15 mA. This limit ensures safe junction temperature operation within the SOT-23 package's thermal constraints (RθJA = 287°C/W) and prevents degradation of long-term stability or voltage accuracy. Exceeding 15 mA risks permanent damage per absolute maximum ratings.
Does LM4050QCEM3-4.1/NOPB require an external output capacitor?
No, LM4050QCEM3-4.1/NOPB does not require an external output capacitor. Its internal compensation guarantees stability across all capacitive loads-including direct connection to ADC reference inputs or op-amp feedback networks-eliminating the need for additional components and reducing PCB area.
Is LM4050QCEM3-4.1/NOPB qualified for automotive applications?
Yes, LM4050QCEM3-4.1/NOPB is LM4050-N-Q1 variant and AEC-Q100 Grade 1 qualified, rated for operation from −40°C to 125°C ambient temperature. It is manufactured on an automotive-grade flow and meets stress testing requirements for engine control, body electronics, and ADAS subsystems.
What is the minimum cathode current needed for regulation in LM4050QCEM3-4.1/NOPB?
The LM4050QCEM3-4.1/NOPB requires a minimum cathode current of 52 μA at 25°C and 78 μA across the full −40°C to 125°C range to maintain regulation. Below this threshold, output voltage deviates beyond specified tolerance, making it suitable for ultra-low-power wake-up circuits and energy-harvesting systems.
How does the 4.096 V output of LM4050QCEM3-4.1/NOPB benefit ADC applications?
The 4.096 V output of LM4050QCEM3-4.1/NOPB aligns precisely with 12-bit ADC full-scale range when powered from a 5 V supply, yielding exactly 1 mV per LSB (4096 mV ÷ 4096 steps). This eliminates software or hardware scaling, reduces quantization error, and simplifies calibration in data-acquisition systems.
LM4050QCEM3-4.1/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:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 93µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 78 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050QCEM3-4.1/NOPB FAQ
1.How can I place an order for LM4050QCEM3-4.1/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QCEM3-4.1/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 LM4050QCEM3-4.1/NOPB reliable?
The price and inventory of LM4050QCEM3-4.1/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QCEM3-4.1/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QCEM3-4.1/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QCEM3-4.1/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QCEM3-4.1/NOPB?
LM4050QCEM3-4.1/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QCEM3-4.1/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 LM4050QCEM3-4.1/NOPB?
For technical support, including LM4050QCEM3-4.1/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QCEM3-4.1/NOPB requirements.
6.How does Aetrix verify that LM4050QCEM3-4.1/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QCEM3-4.1/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 LM4050QCEM3-4.1/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QCEM3-4.1/NOPB?
All LM4050QCEM3-4.1/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QCEM3-4.1/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 LM4050QCEM3-4.1/NOPB part is unused and in its original packaging.
Return procedure for LM4050QCEM3-4.1/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050QCEM3-4.1/NOPB Tags
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