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

Texas Instruments LM4041B12IDBZT

Name: LM4041B12IDBZT
Brand: Texas Instruments
SKU: LM4041B12IDBZT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LM4041B12IDBZT

Manufacturer:: Texas Instruments

Category:: Voltage Reference

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

Datasheet:: LM4041B12IDBZT.pdf

Description:: IC VREF SHUNT 0.2% SOT23-3

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Product details

Overview

LM4041B12IDBZT from Texas Instruments is a precision micropower shunt voltage reference with fixed 1.225 V output, ±0.2% initial tolerance (max), 100 ppm/°C temperature coefficient, 20 μV_RMS wideband noise, and operation from 45 μA to 12 mA cathode current. It serves as a stable voltage reference in low-power analog signal chains and battery-powered instrumentation.

For engineers reviewing the LM4041B12IDBZT datasheet, LM4041B12IDBZT pinout, LM4041B12IDBZT application, or LM4041B12IDBZT equivalent, key selection criteria include its SOT-23-3 package, industrial temperature range (–40°C to +85°C), no-output-capacitor stability, and tight DC accuracy under varying load and temperature conditions.

Technical Context

The LM4041B12IDBZT implements a trimmed Zener-based shunt architecture with fuse and Zener-zap wafer-level trimming to achieve ±0.2% output tolerance. Its low dynamic impedance (≤1.5 Ω at 1 mA) and minimal cathode current sensitivity (ΔV_Z/ΔI_Z ≤ 6 mV over 1–12 mA) ensure stable regulation across wide operating currents.

It operates without external capacitors and remains stable with all capacitive loads due to inherent pole-zero compensation. The device's feedback pin is absent in the fixed 1.225 V version (LM4041B12IDBZT), distinguishing it from adjustable variants and simplifying PCB layout for dedicated reference use cases.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.225 V nominal; enables direct replacement of legacy 1.2 V references with improved accuracy
Initial Tolerance	±0.2% max at 25°C; ensures system-level calibration drift remains within 2.45 mV without post-production trimming
Temp Coefficient	100 ppm/°C max over –40°C to +85°C; contributes ≤12.25 mV total drift across full industrial range
Noise (10 Hz–10 kHz)	20 μV_RMS typical; supports 16-bit+ SAR ADCs without added filtering in precision data acquisition
Min Cathode Current	45 μA typical; allows operation in ultra-low-power systems such as energy-harvesting sensors
Max Cathode Current	12 mA; supports reference buffering or driving moderate loads without external series resistance
Dynamic Impedance	≤1.5 Ω at 1 mA; maintains <1.5 mV output shift per 1 mA load transient, critical for dynamic supply monitoring

Pinout & Package

SOT-23-3 (DBZ) package: compact 2.92 mm × 1.3 mm surface-mount outline with gull-wing leads, JEDEC MO-178 compliant, rated for industrial temperature range (–40°C to +85°C).

Pin/Terminal	Circuit Role	Design Meaning
Cathode (Pin 1)	Shunt current sink and output node	Connects to regulated voltage rail; carries total current (load + reference bias); reverse-biased during normal operation
Anode (Pin 2)	Reference ground reference	Must be connected to system ground; defines 0 V reference point for output voltage measurement
NC (Pin 3)	No-connect terminal	Internally unconnected; must float or tie to Anode (Pin 2) per TI EMI mitigation guidance

Key Features

Feature	Design Value
Capacitor-free stability	Operates stably with any capacitive load (0–∞), eliminating need for output bypass capacitor and reducing BOM count
Micropower operation	45 μA minimum cathode current enables use in always-on battery monitors and IoT endpoint sensors
Low-noise reference	20 μV_RMS noise over 10 Hz–10 kHz supports high-resolution ADCs without external filtering
Wide current range	Supports 45 μA–12 mA cathode current, accommodating both ultra-low-power and moderate-load applications
Industrial temp grade	Specified from –40°C to +85°C, enabling deployment in factory automation, motor drives, and outdoor metering

Applications

Power-Supply Monitors	Data-Acquisition Systems
Use Scenario: Monitoring 3.3 V or 5 V rails in PLC I/O modules for brownout detection and fault logging. IC Role / Device Role / Timing Role: Shunt reference providing precise threshold voltage for comparator-based undervoltage lockout (UVLO). Use Value: ±0.2% tolerance ensures UVLO triggers within ±6.6 mV of setpoint, minimizing false trips in noisy industrial environments.	Use Scenario: Providing reference voltage for 16-bit SAR ADCs in portable handheld test equipment. IC Role / Device Role / Timing Role: Fixed-voltage reference source with low noise and low drift, directly connected to ADC REF+ input. Use Value: 20 μV_RMS noise and 100 ppm/°C drift preserve ENOB >15.2 bits across –20°C to +70°C ambient.
Process Control Sensors	Battery-Powered Equipment
Use Scenario: Calibrating 4–20 mA transmitter circuits in chemical plant field instruments. IC Role / Device Role / Timing Role: Precision voltage reference for DAC output scaling and sensor excitation circuitry. Use Value: Long-term stability of 120 ppm over 1000 hours ensures calibration validity between scheduled maintenance cycles.	Use Scenario: Reference for fuel gauging ICs and low-power microcontroller ADCs in wireless sensor nodes. IC Role / Device Role / Timing Role: Micropower shunt reference enabling continuous voltage monitoring during sleep modes. Use Value: 45 μA minimum cathode current allows operation from coin cells (e.g., CR2032) for >5 years at 1-sample-per-minute duty cycle.

Power-Supply Monitors

Data-Acquisition Systems

Use Scenario: Monitoring 3.3 V or 5 V rails in PLC I/O modules for brownout detection and fault logging.

IC Role / Device Role / Timing Role: Shunt reference providing precise threshold voltage for comparator-based undervoltage lockout (UVLO).

Use Value: ±0.2% tolerance ensures UVLO triggers within ±6.6 mV of setpoint, minimizing false trips in noisy industrial environments.

Use Scenario: Providing reference voltage for 16-bit SAR ADCs in portable handheld test equipment.

IC Role / Device Role / Timing Role: Fixed-voltage reference source with low noise and low drift, directly connected to ADC REF+ input.

Use Value: 20 μV_RMS noise and 100 ppm/°C drift preserve ENOB >15.2 bits across –20°C to +70°C ambient.

Process Control Sensors

Battery-Powered Equipment

Use Scenario: Calibrating 4–20 mA transmitter circuits in chemical plant field instruments.

IC Role / Device Role / Timing Role: Precision voltage reference for DAC output scaling and sensor excitation circuitry.

Use Value: Long-term stability of 120 ppm over 1000 hours ensures calibration validity between scheduled maintenance cycles.

Use Scenario: Reference for fuel gauging ICs and low-power microcontroller ADCs in wireless sensor nodes.

IC Role / Device Role / Timing Role: Micropower shunt reference enabling continuous voltage monitoring during sleep modes.

Use Value: 45 μA minimum cathode current allows operation from coin cells (e.g., CR2032) for >5 years at 1-sample-per-minute duty cycle.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV431ACDBVR	Adjustable 1.24 V reference; 0.5% initial tolerance; higher 150 ppm/°C tempco; requires external resistors for fixed output	Not drop-in: needs resistor network redesign; less accurate and noisier (45 μV_RMS)	Select when adjustable output or cost sensitivity outweighs need for 1.225 V precision and low noise
MAX6008BAUT12+T	Fixed 1.2 V output; ±0.2% tolerance; 75 ppm/°C tempco; 35 μV_RMS noise; 1.8–5.5 V supply-compatible	Different output voltage (1.2 V vs. 1.225 V); higher noise limits resolution in 16-bit+ systems	Choose if 1.2 V output suffices and lower tempco is prioritized over noise performance

Compared with TLV431ACDBVR and MAX6008BAUT12+T, the LM4041B12IDBZT delivers superior DC accuracy alignment to 1.225 V systems, lower noise for high-resolution conversion, and true capacitor-free stability-making it optimal for space-constrained, low-drift, low-noise reference designs where pin compatibility and fixed output are required.

Availability

LM4041B12IDBZT is available at Aetrix Electronics and suitable for power-supply monitors, data-acquisition systems, and battery-powered equipment requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for LM4041B12IDBZT 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 broad industrial portfolio coverage.

The LM4041 product line delivers micropower shunt voltage references optimized for accuracy, stability, and ease of use in space-constrained, low-power applications including instrumentation, energy metering, and portable electronics.

FAQ

What is the output voltage tolerance of the LM4041B12IDBZT over temperature?

The LM4041B12IDBZT has a maximum initial tolerance of ±0.2% at 25°C and maintains ≤±0.2% total error over the full industrial temperature range (–40°C to +85°C) when combined with its 100 ppm/°C temperature coefficient. This yields worst-case deviation of ±10.4 mV relative to 1.225 V across temperature, verified per Section 5.4 of the TI datasheet SLCS146H.

Does the LM4041B12IDBZT require an output capacitor for stability?

No, the LM4041B12IDBZT does not require an output capacitor and is explicitly designed to remain stable with all capacitive loads-including zero capacitance. This eliminates the need for external bypass components and simplifies layout, as confirmed in Section 7.1 and Figure 4-1 of the LM4041 datasheet.

What is the minimum cathode current needed for proper regulation of the LM4041B12IDBZT?

The LM4041B12IDBZT requires a minimum cathode current of 45 μA (typical) and 80 μA (maximum over temperature) to maintain regulation. Below this threshold, output voltage deviates from specification; design must ensure RS resistor sizing guarantees ≥80 μA under worst-case low-VS/high-IL conditions, per Section 7.4.

Is the LM4041B12IDBZT pin-compatible with other LM4041 variants in SOT-23-3?

Yes, the LM4041B12IDBZT shares identical SOT-23-3 (DBZ) pinout with all other LM4041x12x DBZ variants-including A-grade, C-grade, and Q-temp versions. Pin 1 = Cathode, Pin 2 = Anode, Pin 3 = NC-enabling direct substitution within the same grade and temperature rating without layout changes.

What packaging and reel options are available for the LM4041B12IDBZT?

The LM4041B12IDBZT is supplied in tape-and-reel format with 250 units per reel (SMALL T&R), using RoHS-compliant NiPdAu lead finish and meeting JEDEC Level-1 moisture sensitivity. Part marking is "(4ML3, 4MLU)", and it is qualified for industrial temperature operation (–40°C to +85°C), per TI's PACKAGE OPTION ADDENDUM.

LM4041B12IDBZT 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):: 1.225V

Voltage - Output (Max):: -

Current - Output:: 12 mA

Tolerance:: ±0.2%

Temperature Coefficient:: 100ppm/°C

Noise - 0.1Hz to 10Hz:: -

Noise - 10Hz to 10kHz:: 20µVrms

Voltage - Input:: -

Current - Supply:: -

Current - Cathode:: 80 µA

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

LM4041B12IDBZT FAQ

1.How can I place an order for LM4041B12IDBZT through Aetrix?

Please submit a Request for Quotation (RFQ) for LM4041B12IDBZT 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 LM4041B12IDBZT reliable?

The price and inventory of LM4041B12IDBZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041B12IDBZT is usually 5 days.

3.What payment methods are accepted for LM4041B12IDBZT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041B12IDBZT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LM4041B12IDBZT?

LM4041B12IDBZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LM4041B12IDBZT 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 LM4041B12IDBZT?

For technical support, including LM4041B12IDBZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041B12IDBZT requirements.

6.How does Aetrix verify that LM4041B12IDBZT is sourced from the original manufacturer or authorized distributors?

All LM4041B12IDBZT 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 LM4041B12IDBZT meets industry standards.

7.What is the process for return or replacement of LM4041B12IDBZT?

All LM4041B12IDBZT units undergo pre-shipment inspection (PSI). If there is an issue with LM4041B12IDBZT, 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 LM4041B12IDBZT part is unused and in its original packaging.

Return procedure for LM4041B12IDBZT:

1.Submit a request within 90 days.

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

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