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

Texas Instruments LM4050QBIM3X5.0/NOPB

Name: LM4050QBIM3X5.0/NOPB
Brand: Texas Instruments
SKU: LM4050QBIM3X5.0/NOPB
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LM4050QBIM3X5.0/NOPB

Manufacturer:: Texas Instruments

Category:: Voltage Reference

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

Datasheet:: LM4050QBIM3X5.0/NOPB.pdf

Description:: IC VREF SHUNT 0.5% SOT23-3

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Product details

Overview

LM4050QBIM3X5.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 5.0 V reverse breakdown voltage with ±0.1% initial tolerance (A-grade), 50 ppm/°C max temperature coefficient, and 93 μV_rms wideband noise (10 Hz–10 kHz). It operates from 56 μA to 15 mA supply current and supports industrial (−40°C to +85°C) and extended (−40°C to +125°C) temperature ranges - ideal for high-accuracy ADC/DAC biasing in portable instrumentation.

For engineers reviewing the LM4050QBIM3X5.0/NOPB datasheet, LM4050QBIM3X5.0/NOPB pinout, LM4050QBIM3X5.0/NOPB application, or LM4050QBIM3X5.0/NOPB equivalent, key selection criteria include guaranteed 5.0 V output accuracy over temperature, no-output-capacitor operation, capacitive load tolerance, low dynamic impedance (0.5 Ω at 1 mA), and AEC-Q100 Grade 1 qualification for automotive use.

Technical Context

The LM4050QBIM3X5.0/NOPB uses bandgap-based Zener-zap trimmed shunt topology with curvature-corrected temperature drift compensation, enabling stable 5.0 V reference performance across −40°C to +125°C. Its design eliminates external stabilization capacitors while maintaining stability with any capacitive load.

It features fuse-trimmed reverse breakdown voltage during wafer sort, achieving ±0.1% initial accuracy at 25°C (A-grade), and integrates low-noise circuitry yielding 93 μV_rms output noise over 10 Hz–10 kHz. Dynamic impedance remains ≤0.5 Ω across 1 mA operating current, supporting precise regulation under varying load conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	5.0 V nominal reverse breakdown voltage, fixed and factory-trimmed - enables direct replacement of 5 V references without resistor networks.
Initial Tolerance	±0.1% at 25°C (A-grade) - ensures system-level calibration accuracy without post-manufacturing trimming.
Temp Coefficient	≤50 ppm/°C (max, −40°C to +125°C) - limits voltage drift to ±0.25 mV/°C over full range, critical for precision sensor signal chains.
Operating Current	56 μA min to 15 mA max - supports ultra-low-power battery operation and high-current analog front-ends simultaneously.
Output Noise	93 μV_rms (10 Hz–10 kHz) - minimizes added noise in high-resolution data acquisition systems (e.g., 16-bit+ ADCs).
Dynamic Impedance	0.5 Ω at 1 mA - maintains tight regulation under fast load transients, reducing error in feedback-controlled power supplies.
Long-Term Stability	120 ppm (1000 hrs at 25°C) - ensures reference integrity over product lifetime without recalibration.

Pinout & Package

SOT-23 (DBZ) package, 3-pin surface-mount, body size 2.92 mm × 1.30 mm - optimized for space-constrained PCB layouts in portable and automotive modules.

Pin/Terminal	Circuit Role	Design Meaning
Cathode (Pin 1)	Shunt current input / reference voltage node	Connects to regulated voltage rail; sinks all current not drawn by load - sets reference potential via external series resistor.
Anode (Pin 2)	Ground reference terminal	Must be connected to system ground; serves as common return path for cathode current and defines 0 V reference point.
NC (Pin 3)	No internal connection	Left floating per datasheet; no electrical function - avoids unintended parasitic coupling or layout errors.

Key Features

Feature	Design Value
No output capacitor required	Stable operation with zero external capacitance - reduces BOM count and board area in compact designs.
Tolerates capacitive loads	Remains stable with any value of output capacitance - simplifies filtering for noise-sensitive applications like audio DACs.
Fixed 5.0 V breakdown voltage	Factory-trimmed to exact 5.0 V - eliminates need for external resistive dividers or trimming potentiometers.
AEC-Q100 Grade 1 qualified	Rated for −40°C to +125°C operation with automotive reliability testing - suitable for engine control, ADAS, and infotainment systems.
Low 93 μV_rms noise	Minimizes quantization uncertainty in precision measurement circuits - directly improves effective resolution of 16-bit ADCs.

Applications

Portable Instrumentation	Data Acquisition Systems
Use Scenario: Handheld multimeters and battery-powered sensor loggers requiring stable 5 V reference for 16-bit SAR ADCs. IC Role / Device Role / Timing Role: Shunt voltage reference providing excitation and scaling voltage for analog front-end and ADC reference inputs. Use Value: Enables ±0.1% measurement accuracy over temperature without recalibration, extending field service intervals.	Use Scenario: Industrial PLC analog input modules digitizing 4–20 mA sensor signals with 24-bit delta-sigma ADCs. IC Role / Device Role / Timing Role: Precision 5 V reference for ADC VREF and DAC output buffer biasing in isolated signal chains. Use Value: 93 μV_rms noise and 50 ppm/°C drift ensure <0.001% total unadjusted error across operating temperature range.
Automotive Body Control	Precision Audio Components
Use Scenario: In-vehicle HVAC control units monitoring thermistor-based temperature sensors with microcontroller ADCs. IC Role / Device Role / Timing Role: AEC-Q100 Grade 1 shunt reference supplying stable 5 V to MCU analog peripherals in harsh environments. Use Value: Guaranteed operation from −40°C to +125°C and 120 ppm long-term stability prevent calibration drift over vehicle lifetime.	Use Scenario: High-fidelity DAC output stages in portable audio players where reference noise directly impacts THD+N. IC Role / Device Role / Timing Role: Low-noise 5 V shunt reference for op-amp biasing and DAC reference voltage generation. Use Value: 93 μV_rms noise floor contributes <−105 dBc to audio signal path, preserving dynamic range in 24-bit playback.

Portable Instrumentation

Data Acquisition Systems

Use Scenario: Handheld multimeters and battery-powered sensor loggers requiring stable 5 V reference for 16-bit SAR ADCs.

IC Role / Device Role / Timing Role: Shunt voltage reference providing excitation and scaling voltage for analog front-end and ADC reference inputs.

Use Value: Enables ±0.1% measurement accuracy over temperature without recalibration, extending field service intervals.

Use Scenario: Industrial PLC analog input modules digitizing 4–20 mA sensor signals with 24-bit delta-sigma ADCs.

IC Role / Device Role / Timing Role: Precision 5 V reference for ADC VREF and DAC output buffer biasing in isolated signal chains.

Use Value: 93 μV_rms noise and 50 ppm/°C drift ensure <0.001% total unadjusted error across operating temperature range.

Automotive Body Control

Precision Audio Components

Use Scenario: In-vehicle HVAC control units monitoring thermistor-based temperature sensors with microcontroller ADCs.

IC Role / Device Role / Timing Role: AEC-Q100 Grade 1 shunt reference supplying stable 5 V to MCU analog peripherals in harsh environments.

Use Value: Guaranteed operation from −40°C to +125°C and 120 ppm long-term stability prevent calibration drift over vehicle lifetime.

Use Scenario: High-fidelity DAC output stages in portable audio players where reference noise directly impacts THD+N.

IC Role / Device Role / Timing Role: Low-noise 5 V shunt reference for op-amp biasing and DAC reference voltage generation.

Use Value: 93 μV_rms noise floor contributes <−105 dBc to audio signal path, preserving dynamic range in 24-bit playback.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM4040C50IDBZR	5.0 V, ±0.5% initial tolerance (C-grade), 100 ppm/°C tempco, higher 200 μV_rms noise	Lower accuracy and higher drift - suitable for cost-sensitive, non-precision applications only	Select when ±0.5% tolerance and relaxed noise specs meet system requirements and BOM cost is primary driver.
ADR3450ARJZ-R7	5.0 V, ±0.1% tolerance, 10 ppm/°C max tempco, 5.5 μV_rms noise, but requires 100 nF output capacitor	Superior stability and noise, but adds capacitor and footprint - incompatible with no-capacitor designs	Choose when ultra-low drift/noise justifies added component and layout complexity; not drop-in compatible.

Compared with LM4050QBIM3X5.0/NOPB, LM4040C50IDBZR trades accuracy and noise for lower cost, while ADR3450ARJZ-R7 delivers superior specs at the expense of capacitor dependency - making LM4050QBIM3X5.0/NOPB the optimal balance of precision, simplicity, and automotive qualification.

Availability

LM4050QBIM3X5.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, automotive body control modules, and precision data acquisition systems requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for LM4050QBIM3X5.0/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 leader specializing in analog, embedded processing, and connectivity technologies, with decades of leadership in precision analog ICs.

The LM4050-N family was designed specifically for space-constrained, high-accuracy applications demanding micropower operation, no-output-capacitor simplicity, and robust temperature performance - targeting portable, industrial, and automotive markets.

FAQ

What is the output voltage tolerance of LM4050QBIM3X5.0/NOPB at 25°C?

The LM4050QBIM3X5.0/NOPB has a guaranteed ±0.1% initial output voltage tolerance at 25°C (A-grade specification), verified through wafer-level Zener-zap trimming. This tolerance holds for the nominal 5.0 V reverse breakdown voltage under test condition IR = 100 μA, and is documented in Section 6.8 of the SNOS455G datasheet.

Does LM4050QBIM3X5.0/NOPB require an external output capacitor?

No, the LM4050QBIM3X5.0/NOPB does not require an external output capacitor for stability. Its internal design ensures unconditional stability with any capacitive load, including zero capacitance - a key differentiator versus many competing shunt references that mandate minimum output capacitance.

What is the minimum operating current for LM4050QBIM3X5.0/NOPB?

The LM4050QBIM3X5.0/NOPB requires a minimum operating current of 56 μA at 25°C (industrial grade) and up to 90 μA across the full −40°C to +125°C range. This current must be supplied via an external series resistor to maintain regulation; operation below this threshold results in loss of specified voltage accuracy.

Is LM4050QBIM3X5.0/NOPB qualified for automotive applications?

Yes, LM4050QBIM3X5.0/NOPB is the Q1 variant (LM4050-N-Q1 family) and is AEC-Q100 Grade 1 qualified, rated for operation from −40°C to +125°C ambient temperature with full automotive reliability testing - making it suitable for engine bay, chassis, and infotainment applications.

What is the wideband output noise of LM4050QBIM3X5.0/NOPB?

The LM4050QBIM3X5.0/NOPB delivers 93 μV_rms wideband noise over the 10 Hz to 10 kHz frequency range, measured at IR = 100 μA. This low-noise performance is critical for high-resolution data converters and precision analog signal conditioning where reference noise directly limits system dynamic range.

LM4050QBIM3X5.0/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:: Obsolete

Reference Type:: Shunt

Output Type:: Fixed

Voltage - Output (Min/Fixed):: 5V

Voltage - Output (Max):: -

Current - Output:: 15 mA

Tolerance:: ±0.2%

Temperature Coefficient:: 50ppm/°C

Noise - 0.1Hz to 10Hz:: -

Noise - 10Hz to 10kHz:: 93µVrms

Voltage - Input:: -

Current - Supply:: -

Current - Cathode:: 80 µA

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

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

LM4050QBIM3X5.0/NOPB FAQ

1.How can I place an order for LM4050QBIM3X5.0/NOPB through Aetrix?

Please submit a Request for Quotation (RFQ) for LM4050QBIM3X5.0/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 LM4050QBIM3X5.0/NOPB reliable?

The price and inventory of LM4050QBIM3X5.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050QBIM3X5.0/NOPB is usually 5 days.

3.What payment methods are accepted for LM4050QBIM3X5.0/NOPB?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050QBIM3X5.0/NOPB transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LM4050QBIM3X5.0/NOPB?

LM4050QBIM3X5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LM4050QBIM3X5.0/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 LM4050QBIM3X5.0/NOPB?

For technical support, including LM4050QBIM3X5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050QBIM3X5.0/NOPB requirements.

6.How does Aetrix verify that LM4050QBIM3X5.0/NOPB is sourced from the original manufacturer or authorized distributors?

All LM4050QBIM3X5.0/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 LM4050QBIM3X5.0/NOPB meets industry standards.

7.What is the process for return or replacement of LM4050QBIM3X5.0/NOPB?

All LM4050QBIM3X5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050QBIM3X5.0/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 LM4050QBIM3X5.0/NOPB part is unused and in its original packaging.

Return procedure for LM4050QBIM3X5.0/NOPB:

1.Submit a request within 90 days.

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

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