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Texas Instruments LM4050QCEM3-10/NOPB
- Part No.:
- LM4050QCEM3-10/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050QCEM3-10/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,266
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Product details
Overview
LM4050QCEM3-10/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a fixed 10V reverse breakdown voltage with ±10 mV (±0.1%) initial tolerance at 25°C, 50 ppm/°C max temperature coefficient, and 150 μVrms wideband noise (10 Hz–10 kHz). It operates from 80 μA to 15 mA over −40°C to 125°C and requires no output capacitor-enabling stable regulation in battery-powered data acquisition and automotive sensor signal conditioning.
For engineers reviewing the LM4050QCEM3-10/NOPB datasheet, LM4050QCEM3-10/NOPB pinout, LM4050QCEM3-10/NOPB application, or LM4050QCEM3-10/NOPB equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, 100 μA minimum operating current at 10V, low dynamic impedance (0.7 Ω), thermal hysteresis of 2.8 mV, and compatibility with capacitive loads without external compensation.
Technical Context
The LM4050QCEM3-10/NOPB implements a curvature-corrected bandgap shunt architecture with Zener-zap trim for ±0.1% accuracy, enabling closed-loop regulation without external feedback resistors. Its internal compensation ensures stability across 0–15 mA load current and any capacitive load, eliminating need for output bypass capacitors.
As an automotive-grade variant (LM4050-N-Q1), it features fuse-trimmed voltage calibration, specified operation from −40°C to 125°C, and meets AEC-Q100 Grade 1 reliability requirements-including ESD ratings of ±2000 V HBM and ±500 V CDM-making it suitable for under-hood and ADAS power rail monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 10 V nominal reverse breakdown voltage; enables LSB-matched 12-bit ADCs operating from ≥10 V supplies (2 mV/LSB). |
| Initial Tolerance | ±10 mV (±0.1%) at 25°C; supports high-accuracy calibration in test equipment and energy metering. |
| Temp Coefficient | ≤50 ppm/°C over −40°C to 125°C; ensures <±43 mV total drift across full automotive range. |
| Min Operating Current | 100 μA at 25°C; allows ultra-low-power operation in always-on battery sensors and wake-up circuits. |
| Dynamic Impedance | 0.7 Ω at 1 mA / 120 Hz; maintains tight regulation despite fast load transients in precision analog front-ends. |
| Noise (10 Hz–10 kHz) | 150 μVrms; limits quantization error in 16-bit+ data converters without additional filtering. |
| Thermal Hysteresis | 2.8 mV after −40°C ↔ 125°C cycling; critical for repeatable measurements in cyclic thermal environments. |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, 3-pin surface-mount configuration with exposed die attach pad not connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage regulation node | Receives input current (IS) and sinks load + reference current; voltage regulated between this pin and Anode. |
| Anode (Pin 2) | Reference ground / common return | Must be connected to system ground; serves as voltage reference point for cathode-to-anode breakdown. |
| 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 |
|---|---|
| Fixed 10V output | Eliminates external resistor divider; reduces BOM count and layout area in space-constrained modules. |
| No output capacitor required | Internally compensated design ensures stability with any capacitive load-simplifies layout and improves startup reliability. |
| AEC-Q100 Grade 1 qualified | Validated for automotive applications up to 125°C junction temperature; includes stress testing per JEDEC standards. |
| Low 100 μA min current | Enables use in microamp-level sleep modes while maintaining regulation-critical for battery longevity in telematics. |
| 150 μVrms noise | Supports high-resolution ADCs without post-regulation filtering; preserves SNR in precision instrumentation signal chains. |
Applications
| Battery-Powered Data Loggers | Automotive Sensor Signal Conditioning |
|---|---|
Use Scenario: Continuous voltage monitoring of 12 V vehicle battery during engine-off state using ultra-low-power MCU with integrated 12-bit ADC. IC Role / Device Role / Timing Role: Shunt reference providing stable 10 V reference for ADC full-scale calibration, replacing less accurate internal references. Use Value: Enables ±0.1% battery voltage measurement accuracy over −40°C to 85°C ambient, meeting OEM diagnostic thresholds. |
Use Scenario: Front-end reference for pressure and temperature sensors in ADAS radar modules requiring stable bias under thermal cycling. IC Role / Device Role / Timing Role: Precision voltage reference for analog signal conditioning circuitry, ensuring consistent gain and offset across temperature extremes. Use Value: Maintains <±43 mV output drift over −40°C to 125°C, preserving sensor linearity without recalibration. |
| Industrial Energy Metering | Portable Test & Measurement Equipment |
Use Scenario: Reference source for polyphase electricity meters measuring active/reactive power with 0.2S-class accuracy compliance. IC Role / Device Role / Timing Role: Primary shunt reference feeding metrology ADCs and isolation amplifiers in revenue-grade metering ICs. Use Value: Delivers 120 ppm long-term stability (1000 hrs) and 2.8 mV thermal hysteresis-meeting IEC 62053-21 repeatability requirements. |
Use Scenario: Calibration reference in handheld multimeters and portable oscilloscopes where size, accuracy, and battery life are critical. IC Role / Device Role / Timing Role: Fixed 10 V reference for autoranging ADCs and DAC-based output stages in compact benchtop instruments. Use Value: Achieves ±0.1% initial accuracy and 150 μVrms noise in sub-10 mm² SOT-23 footprint-reducing PCB area by >60% vs. SOIC alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5010IDR | Series reference (not shunt); 10 V output, 3 ppm/°C tempco, 10 μVrms noise; requires external pass transistor for high current. | Used in low-noise lab equipment where ultra-low drift outweighs board space and complexity cost. | Select REF5010IDR only when <1 ppm/°C drift and sub-20 μV noise are mandatory-and layout space permits series topology. |
| ADR4510BRZ | Series reference; 10 V output, 3 ppm/°C tempco, 12 μVrms noise; higher quiescent current (950 μA) and larger SOIC-8 package. | Favored in industrial PLC analog I/O modules where long-term stability trumps power budget. | Choose ADR4510BRZ if system can accommodate SOIC-8 footprint and >900 μA supply current-avoid for battery or space-constrained designs. |
Compared with REF5010IDR and ADR4510BRZ, LM4050QCEM3-10/NOPB offers the only AEC-Q100-qualified 10 V shunt reference in SOT-23, enabling direct replacement in automotive and portable systems where low quiescent current (<100 μA), zero external components, and minimal footprint are non-negotiable.
Availability
LM4050QCEM3-10/NOPB is available at Aetrix Electronics and suitable for automotive sensor modules, portable test equipment, and industrial energy metering requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LM4050QCEM3-10/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 90 years of innovation in precision analog ICs and automotive-grade components.
The LM4050-N-Q1 product line delivers AEC-Q100 qualified shunt voltage references optimized for harsh-environment automotive and industrial applications-designed to replace discrete Zener solutions with superior accuracy, stability, and ease of use.
FAQ
What is the minimum operating current for LM4050QCEM3-10/NOPB at 25°C?
The LM4050QCEM3-10/NOPB requires a minimum cathode current of 100 μA at 25°C to maintain regulation within specifications. This value increases slightly to 110 μA across the full −40°C to 125°C extended temperature range, as confirmed in Section 5.10 of the TI datasheet.
Is LM4050QCEM3-10/NOPB AEC-Q100 qualified, and what grade does it meet?
Yes, LM4050QCEM3-10/NOPB is AEC-Q100 Grade 1 qualified, meaning it is certified for automotive applications with junction temperature operation from −40°C to +125°C and validated per stress test requirements including HTOL, TC, and ESD (±2000 V HBM).
Does LM4050QCEM3-10/NOPB require an external output capacitor for stability?
No-LM4050QCEM3-10/NOPB is internally compensated and remains stable with any capacitive load, including zero output capacitance. External capacitors may be added for noise reduction but are never required for loop stability, simplifying design in space-constrained layouts.
What is the thermal hysteresis specification for LM4050QCEM3-10/NOPB?
The LM4050QCEM3-10/NOPB exhibits 2.8 mV thermal hysteresis-the voltage shift measured at 25°C after cycling between −40°C and 125°C. This parameter reflects mechanical stress-induced drift and is critical for repeatable calibration in cyclic thermal environments like engine bay electronics.
How does the 10 V output of LM4050QCEM3-10/NOPB benefit ADC applications?
The 10 V output of LM4050QCEM3-10/NOPB enables precise LSB matching for 12-bit ADCs operating on ≥10 V supplies (2 mV/LSB), and supports 16-bit systems where 10 V full-scale maximizes dynamic range while minimizing gain error sensitivity to reference drift.
LM4050QCEM3-10/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):
- 10V
- 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:
- 110 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050QCEM3-10/NOPB FAQ
1.How can I place an order for LM4050QCEM3-10/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050QCEM3-10/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 LM4050QCEM3-10/NOPB reliable?
The price and inventory of LM4050QCEM3-10/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QCEM3-10/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050QCEM3-10/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QCEM3-10/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050QCEM3-10/NOPB?
LM4050QCEM3-10/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050QCEM3-10/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 LM4050QCEM3-10/NOPB?
For technical support, including LM4050QCEM3-10/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QCEM3-10/NOPB requirements.
6.How does Aetrix verify that LM4050QCEM3-10/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050QCEM3-10/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 LM4050QCEM3-10/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050QCEM3-10/NOPB?
All LM4050QCEM3-10/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QCEM3-10/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 LM4050QCEM3-10/NOPB part is unused and in its original packaging.
Return procedure for LM4050QCEM3-10/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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