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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Reference

Texas Instruments LM4050QCEM3X5.0/NOPB

Name: LM4050QCEM3X5.0/NOPB
Brand: Texas Instruments
SKU: LM4050QCEM3X5.0/NOPB
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LM4050QCEM3X5.0/NOPB

Manufacturer:: Texas Instruments

Category:: Voltage Reference

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: LM4050QCEM3X5.0/NOPB.pdf

Description:: IC VREF SHUNT 0.5% SOT23-3

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Product details

Overview

LM4050QCEM3X5.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a fixed 5.0 V reverse breakdown voltage with ±5 mV (±0.1%) initial tolerance at 25°C, 50 ppm/°C max temperature coefficient, and 93 μV_rms wideband noise (10 Hz–10 kHz). It operates from 60 μA to 15 mA over −40°C to 125°C and requires no output capacitor - used in high-accuracy ADC/DAC references and automotive sensor signal conditioning.

For engineers reviewing the LM4050QCEM3X5.0/NOPB datasheet, LM4050QCEM3X5.0/NOPB pinout, LM4050QCEM3X5.0/NOPB application, or LM4050QCEM3X5.0/NOPB equivalent, key selection criteria include AEC-Q100 Grade 1 qualification, cathode-anode shunt topology, thermal hysteresis ≤1.4 mV, and compatibility with capacitive loads without external stabilization.

Technical Context

The LM4050QCEM3X5.0/NOPB implements a curvature-corrected bandgap reference architecture with Zener-zap trim for ±0.1% initial accuracy. Its internal compensation eliminates need for output capacitance while maintaining stability across 60 μA–15 mA operating current and all capacitive load conditions.

As an AEC-Q100 Grade 1 qualified device, it supports automotive applications with guaranteed operation from −40°C to +125°C ambient, 50 ppm/°C max tempco, and thermal hysteresis of 1.4 mV after −40°C ↔ 125°C cycling - verified via fuse-trimmed wafer-sort calibration and dynamic impedance <0.5 Ω at 1 mA.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	5.0 V nominal reverse breakdown voltage - enables direct 12-bit ADC full-scale reference with 1.22 mV LSB on 5 V supply.
Initial Tolerance	±5 mV (±0.1%) at 25°C - ensures single-point calibration suffices for high-precision measurement systems.
Tempco	≤50 ppm/°C over −40°C to 125°C - limits drift to ±0.625 mV across full automotive temperature range.
Noise (10 Hz–10 kHz)	93 μV_rms - preserves SNR in 16-bit+ data acquisition without additional filtering.
Operating Current Range	60 μA to 15 mA - supports ultra-low-power battery monitoring and high-current precision regulation in same footprint.
Dynamic Impedance	0.5 Ω at 1 mA - minimizes load-induced voltage shift in varying-current applications like sensor excitation.
Thermal Hysteresis	1.4 mV - defines repeatability error after thermal cycling, critical for field-deployed instrumentation.

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 electrically connected.

Pin/Terminal	Circuit Role	Design Meaning
Cathode (Pin 1)	Shunt current input / reference voltage node	Carries total current (I_Q + I_L); voltage regulated between this pin and Anode; must be driven above 5.0 V via series resistor for regulation.
Anode (Pin 2)	Reference ground / common return	Connected to system ground; forms low-impedance return path; all voltage specs referenced to this node.
NC (Pin 3)	No internal connection	Die attach interface contact; must remain floating or tied to Pin 2 per TI layout guidance to avoid EMI coupling.

Key Features

Feature	Design Value
Fixed 5.0 V output	Eliminates external feedback resistors - 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 avoids capacitor aging effects.
AEC-Q100 Grade 1 qualified	Validated for automotive powertrain and chassis systems with operation up to +125°C ambient and robust ESD immunity (±2 kV HBM).
Low 60 μA minimum operating current	Enables use in always-on battery-powered nodes such as tire pressure sensors and telematics backup supplies.
Curvature-corrected bandgap core	Delivers flat temperature response - achieves ±50 ppm/°C max drift without external trimming components.

Applications

Battery-Powered Precision Sensors	Automotive Engine Control Units
Use Scenario: Low-power gas concentration sensor with 16-bit sigma-delta ADC in portable emissions tester. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 5.0 V excitation and ADC reference under varying battery voltage (3.0–4.2 V) and temperature. Use Value: ±5 mV initial tolerance and 50 ppm/°C tempco ensure <0.01% full-scale error across operating life without recalibration.	Use Scenario: Throttle position sensor signal conditioning in gasoline direct injection engine control module. IC Role / Device Role / Timing Role: Precision 5.0 V reference for ratiometric potentiometer interface and analog front-end ADC. Use Value: AEC-Q100 Grade 1 rating and 1.4 mV thermal hysteresis guarantee repeatable readings after cold-start thermal cycling.
Industrial Data Acquisition Modules	Energy Metering Reference Subsystem
Use Scenario: DIN-rail mounted 8-channel 24-bit isolated analog input module for PLCs. IC Role / Device Role / Timing Role: Primary reference for simultaneous-sampling SAR ADCs, shared across multiple channels via low-noise distribution. Use Value: 93 μV_rms noise and 0.5 Ω dynamic impedance prevent channel-to-channel crosstalk and maintain >100 dB SNR.	Use Scenario: Revenue-grade electricity meter using metrology-grade ADC with anti-tampering diagnostics. IC Role / Device Role / Timing Role: Stable 5.0 V reference for both voltage and current channel ADCs, enabling true RMS calculation with <0.1% error. Use Value: Long-term stability of 120 ppm/1000 hrs and ±50 ppm/°C tempco meet IEC 62053-21 Class 0.2 accuracy requirements.

Battery-Powered Precision Sensors

Automotive Engine Control Units

Use Scenario: Low-power gas concentration sensor with 16-bit sigma-delta ADC in portable emissions tester.

IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 5.0 V excitation and ADC reference under varying battery voltage (3.0–4.2 V) and temperature.

Use Value: ±5 mV initial tolerance and 50 ppm/°C tempco ensure <0.01% full-scale error across operating life without recalibration.

Use Scenario: Throttle position sensor signal conditioning in gasoline direct injection engine control module.

IC Role / Device Role / Timing Role: Precision 5.0 V reference for ratiometric potentiometer interface and analog front-end ADC.

Use Value: AEC-Q100 Grade 1 rating and 1.4 mV thermal hysteresis guarantee repeatable readings after cold-start thermal cycling.

Industrial Data Acquisition Modules

Energy Metering Reference Subsystem

Use Scenario: DIN-rail mounted 8-channel 24-bit isolated analog input module for PLCs.

IC Role / Device Role / Timing Role: Primary reference for simultaneous-sampling SAR ADCs, shared across multiple channels via low-noise distribution.

Use Value: 93 μV_rms noise and 0.5 Ω dynamic impedance prevent channel-to-channel crosstalk and maintain >100 dB SNR.

Use Scenario: Revenue-grade electricity meter using metrology-grade ADC with anti-tampering diagnostics.

IC Role / Device Role / Timing Role: Stable 5.0 V reference for both voltage and current channel ADCs, enabling true RMS calculation with <0.1% error.

Use Value: Long-term stability of 120 ppm/1000 hrs and ±50 ppm/°C tempco meet IEC 62053-21 Class 0.2 accuracy requirements.

Equivalent & Alternatives

The following parts are listed as comparable options for similar shunt voltage reference applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
REF5050IDBZR	Series reference (not shunt); 5.0 V, ±0.05% initial accuracy; 3 μV_rms noise; requires input voltage ≥5.3 V.	Used where higher accuracy and lower noise justify added complexity and headroom; unsuitable for low-voltage or battery-fed shunt topologies.	Select REF5050IDBZR only when supply margin allows ≥5.3 V and sub-10 μV_rms noise is mandatory.
TL431CDBVR	Adjustable shunt reference; 2.495 V nominal; ±1% initial tolerance; 200 ppm/°C tempco; 15 μV_rms noise; requires two external resistors.	Cost-sensitive industrial controls where 5 V is not required and ±1% tolerance is acceptable.	Choose TL431CDBVR for non-automotive, non-precision applications where BOM cost dominates performance needs.

Compared with REF5050IDBZR and TL431CDBVR, the LM4050QCEM3X5.0/NOPB uniquely combines AEC-Q100 qualification, fixed 5.0 V output, zero-external-component operation, and 50 ppm/°C tempco - making it optimal for automotive and industrial shunt-regulated systems needing drop-in reliability without layout redesign.

Availability

LM4050QCEM3X5.0/NOPB is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive sensor interfaces, and industrial data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LM4050QCEM3X5.0/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 in automotive, industrial, and portable electronics - designed to replace discrete Zener solutions with superior stability and qualification.

FAQ

What is the maximum operating temperature for LM4050QCEM3X5.0/NOPB?

The LM4050QCEM3X5.0/NOPB is rated for operation from −40°C to +125°C ambient temperature as part of its AEC-Q100 Grade 1 qualification. This extended temperature range is validated per TI's automotive flow and supports under-hood and transmission-control applications where junction temperatures may approach 150°C under sustained load.

Does LM4050QCEM3X5.0/NOPB require an external capacitor for stability?

No, the LM4050QCEM3X5.0/NOPB is internally compensated and does not require an external output capacitor to maintain stability - even with capacitive loads. This eliminates capacitor-related aging, leakage, and PCB area concerns. A bypass capacitor may be added optionally for further noise reduction, but it is not necessary for regulation integrity.

What is the minimum cathode current needed for regulation in LM4050QCEM3X5.0/NOPB?

The LM4050QCEM3X5.0/NOPB requires a minimum cathode current of 60 μA at 25°C to maintain regulation, rising to 90 μA across the full −40°C to +125°C range. This value is specified in the Electrical Characteristics table for the 5 V option and must be supplied via the series resistor (R_S) regardless of load current variation.

How does thermal hysteresis affect LM4050QCEM3X5.0/NOPB performance?

Thermal hysteresis in the LM4050QCEM3X5.0/NOPB is measured as 1.4 mV - the voltage shift observed at 25°C after cycling between −40°C and +125°C. This mechanical stress-induced offset impacts absolute accuracy in field-redeployed equipment but does not affect short-term stability or repeatability within a single thermal cycle.

Is LM4050QCEM3X5.0/NOPB pin-compatible with other LM4050 variants?

Yes, all LM4050-N and LM4050-Q1 variants in SOT-23 (DBZ) package share identical pinout: Cathode (Pin 1), Anode (Pin 2), and NC (Pin 3). The LM4050QCEM3X5.0/NOPB is mechanically and electrically interchangeable with LM4050AIM3X5.0/NOPB or LM4050BEM3X5.0/NOPB - only voltage tolerance grade and qualification level differ.

LM4050QCEM3X5.0/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):: 5V

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:: 90 µA

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

LM4050QCEM3X5.0/NOPB FAQ

1.How can I place an order for LM4050QCEM3X5.0/NOPB through Aetrix?

Please submit a Request for Quotation (RFQ) for LM4050QCEM3X5.0/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 LM4050QCEM3X5.0/NOPB reliable?

The price and inventory of LM4050QCEM3X5.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QCEM3X5.0/NOPB is usually 5 days.

3.What payment methods are accepted for LM4050QCEM3X5.0/NOPB?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QCEM3X5.0/NOPB transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LM4050QCEM3X5.0/NOPB?

LM4050QCEM3X5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LM4050QCEM3X5.0/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 LM4050QCEM3X5.0/NOPB?

For technical support, including LM4050QCEM3X5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QCEM3X5.0/NOPB requirements.

6.How does Aetrix verify that LM4050QCEM3X5.0/NOPB is sourced from the original manufacturer or authorized distributors?

All LM4050QCEM3X5.0/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 LM4050QCEM3X5.0/NOPB meets industry standards.

7.What is the process for return or replacement of LM4050QCEM3X5.0/NOPB?

All LM4050QCEM3X5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QCEM3X5.0/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 LM4050QCEM3X5.0/NOPB part is unused and in its original packaging.

Return procedure for LM4050QCEM3X5.0/NOPB:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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