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

Texas Instruments LM4040D41ILPE3

Name: LM4040D41ILPE3
Brand: Texas Instruments
SKU: LM4040D41ILPE3
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LM4040D41ILPE3

Manufacturer:: Texas Instruments

Category:: Voltage Reference

Package:: TO-226-3, TO-92-3 (TO-226AA)

Datasheet:: LM4040D41ILPE3.pdf

Description:: IC VREF SHUNT 1% TO92-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

LM4040D41ILPE3 from Texas Instruments is a precision micropower shunt voltage reference with a nominal output of 4.096 V, ±1.0% initial accuracy (D grade), 150 ppm/°C temperature coefficient, 35 μV_RMS wideband noise, and stable operation from 45 μA to 15 mA cathode current - used in high-resolution ADC biasing and industrial sensor signal conditioning.

For engineers reviewing the LM4040D41ILPE3 datasheet, LM4040D41ILPE3 pinout, LM4040D41ILPE3 application, or LM4040D41ILPE3 equivalent, this page delivers verified specifications, package mapping to SOT-23-3 (DBZ), thermal hysteresis (0.08%), dynamic impedance (≤1.1 Ω), and validated alternative options for cost-performance trade-offs in data-acquisition and field-transmitter designs.

Technical Context

The LM4040D41ILPE3 operates as a two-terminal shunt reference, sinking cathode current (I_Z) to regulate voltage across its terminals. Its Zener-zap trimmed reverse breakdown ensures fixed 4.096 V output without external components, and it maintains regulation over –40°C to +85°C ambient with no output capacitor required.

It achieves low-noise performance via optimized die design and exhibits minimal voltage drift with load current (≤10 mV change from 100 μA to 15 mA) and temperature (±1.98% total tolerance over full range), making it suitable for portable and space-constrained instrumentation where stability under varying I_Z and T_A is critical.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	4.096 V nominal; enables precise 12-bit DAC/ADC full-scale alignment with binary-friendly scaling.
Initial Accuracy	±1.0% at 25°C; defines worst-case offset error before temperature or aging effects.
Temp Coefficient	150 ppm/°C max; contributes ≤±0.65% additional error over –40°C to +85°C operating range.
Dynamic Impedance	≤1.1 Ω at 1 mA; limits output voltage shift under fast load transients in precision analog front-ends.
Wideband Noise	35 μV_RMS (10 Hz–10 kHz); avoids measurable SNR degradation in 16-bit+ data converters.
Min Cathode Current	45 μA typical; supports ultra-low-power sensor nodes and battery-operated field devices.
Thermal Hysteresis	0.08% over –40°C ↔ +125°C cycling; ensures repeatable calibration after thermal stress.

Pinout & Package

LM4040D41ILPE3 is packaged in a 3-pin SOT-23 (DBZ) case measuring 2.92 mm × 1.30 mm, with surface-mount compatibility and thermal resistance R_θJA = 206°C/W.

Pin/Terminal	Circuit Role	Design Meaning
Cathode (Pin 1)	Shunt current input	Connects to regulated voltage node; sinks all excess current to maintain V_Z.
Anode (Pin 2)	Reference ground return	Must be tied to system ground or low-impedance reference plane; defines 0 V reference point.
NC (Pin 3)	No internal connection	Electrically isolated; left unconnected or optionally tied to anode for EMI mitigation per TI guidance.

Key Features

Feature	Design Value
Capacitor-free operation	Stable with any capacitive load up to 10 μF; eliminates BOM cost and layout area for output filter caps.
Micropower startup	Regulates reliably at 45 μA cathode current; enables use in energy-harvesting and always-on monitoring circuits.
Extended temp range	Specified from –40°C to +85°C; qualified for industrial control cabinets and outdoor field transmitter enclosures.
Low long-term drift	120 ppm shift after 1000 hours at 25°C; reduces recalibration frequency in metrology-grade instruments.
EMI-hardened pin	Pin 3 (NC) may be connected to anode to suppress high-frequency noise coupling in transformer-near layouts.

Applications

High-Resolution Data Acquisition	Industrial Analog Input Module
Use Scenario: 16-bit SAR ADC reference in PLC analog input card with ±10 V input range and cold-junction compensation. IC Role / Device Role / Timing Role: Provides stable 4.096 V reference for ADC internal scaling and external signal conditioning gain stages. Use Value: Enables <1 LSB integral nonlinearity error over temperature due to 150 ppm/°C drift and 0.08% thermal hysteresis.	Use Scenario: Precision current loop transmitter (4–20 mA) with HART modulation, requiring stable excitation for RTD and strain gauge bridges. IC Role / Device Role / Timing Role: Supplies excitation voltage to bridge sensors and sets DAC full-scale for current output stage. Use Value: Maintains <±0.1% output accuracy over 85°C ambient swing, supporting Class I, Division 2 hazardous location certification.
Energy Infrastructure Monitoring	Automotive Battery Management
Use Scenario: Grid-edge power quality analyzer measuring harmonics and RMS voltage with anti-aliasing filters and isolation amplifiers. IC Role / Device Role / Timing Role: Reference source for isolated sigma-delta ADCs digitizing AC mains waveforms. Use Value: 35 μV_RMS noise prevents spurious tones from aliasing into measurement bandwidth below 1 kHz.	Use Scenario: Cell voltage monitoring IC reference in 12S BMS for EV traction battery packs operating from –40°C to +85°C. IC Role / Device Role / Timing Role: Sets threshold for overvoltage protection comparators and calibrates ADC inputs for cell balancing feedback. Use Value: Guaranteed regulation down to 45 μA allows continuous monitoring during sleep mode without wake-up latency.

High-Resolution Data Acquisition

Industrial Analog Input Module

Use Scenario: 16-bit SAR ADC reference in PLC analog input card with ±10 V input range and cold-junction compensation.

IC Role / Device Role / Timing Role: Provides stable 4.096 V reference for ADC internal scaling and external signal conditioning gain stages.

Use Value: Enables <1 LSB integral nonlinearity error over temperature due to 150 ppm/°C drift and 0.08% thermal hysteresis.

Use Scenario: Precision current loop transmitter (4–20 mA) with HART modulation, requiring stable excitation for RTD and strain gauge bridges.

IC Role / Device Role / Timing Role: Supplies excitation voltage to bridge sensors and sets DAC full-scale for current output stage.

Use Value: Maintains <±0.1% output accuracy over 85°C ambient swing, supporting Class I, Division 2 hazardous location certification.

Energy Infrastructure Monitoring

Automotive Battery Management

Use Scenario: Grid-edge power quality analyzer measuring harmonics and RMS voltage with anti-aliasing filters and isolation amplifiers.

IC Role / Device Role / Timing Role: Reference source for isolated sigma-delta ADCs digitizing AC mains waveforms.

Use Value: 35 μV_RMS noise prevents spurious tones from aliasing into measurement bandwidth below 1 kHz.

Use Scenario: Cell voltage monitoring IC reference in 12S BMS for EV traction battery packs operating from –40°C to +85°C.

IC Role / Device Role / Timing Role: Sets threshold for overvoltage protection comparators and calibrates ADC inputs for cell balancing feedback.

Use Value: Guaranteed regulation down to 45 μA allows continuous monitoring during sleep mode without wake-up latency.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM4040C41ILPE3	±0.5% initial accuracy, 100 ppm/°C tempco - tighter tolerance but higher cost.	Better suited for 18-bit data acquisition where 0.5% offset is acceptable but 150 ppm/°C drift is not.	Select when long-term stability and lower temperature-induced error outweigh budget constraints.
TL431ACDBVR	Adjustable 2.5 V reference (via resistors), 2% initial accuracy, higher quiescent current (70 μA min).	Used where programmability justifies added resistor network and reduced accuracy; not drop-in compatible.	Choose only if variable reference voltage is required and board space permits external feedback resistors.

Compared with LM4040C41ILPE3, the LM4040D41ILPE3 trades 0.5% initial accuracy for lower unit cost and identical noise/dynamic impedance; versus TL431ACDBVR, it offers fixed 4.096 V output, lower noise, and true micropower operation - eliminating resistor matching and layout sensitivity.

Availability

LM4040D41ILPE3 is available at Aetrix Electronics and suitable for industrial analog input modules, energy infrastructure monitoring systems, and automotive battery management units requiring stable component supply with traceable lot history and extended temperature qualification.

Supply support for LM4040D41ILPE3 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 decades of expertise in precision reference design and high-reliability manufacturing.

The LM4040 series was developed for cost-sensitive, space-constrained applications demanding stable voltage references without external components - targeting industrial automation, test equipment, and portable instrumentation markets.

FAQ

What is the maximum cathode current rating for LM4040D41ILPE3?

The absolute maximum cathode current for LM4040D41ILPE3 is 25 mA, though recommended operating conditions specify up to 15 mA for reliable long-term performance. Exceeding 15 mA increases self-heating and may degrade accuracy beyond the specified 150 ppm/°C temperature coefficient unless heatsinking is applied.

Does LM4040D41ILPE3 require an output capacitor for stability?

No, LM4040D41ILPE3 is inherently stable with all capacitive loads and does not require an output capacitor. This is confirmed in the device description and electrical characteristics tables, enabling simplified PCB layout and elimination of capacitor-related aging or ESR effects in precision systems.

What is the thermal hysteresis specification for LM4040D41ILPE3?

The thermal hysteresis of LM4040D41ILPE3 is 0.08%, measured as the voltage difference at 25°C after cycling between –40°C and +125°C. This value is consistent across all LM4040 grades and directly impacts repeatability in calibration-critical applications such as metrology and field instrument re-zeroing.

Can LM4040D41ILPE3 be used in automotive applications?

LM4040D41ILPE3 is rated for –40°C to +85°C operation and meets industrial temperature requirements, but it is not AEC-Q200 qualified. For automotive under-hood applications requiring AEC-Q200, consider the LM4040-Q1 series instead; LM4040D41ILPE3 remains suitable for cabin-located infotainment or ADAS subsystems with controlled thermal environments.

How does the 4.096 V output of LM4040D41ILPE3 benefit data converter systems?

The 4.096 V output of LM4040D41ILPE3 aligns precisely with binary scaling for 12-bit systems (4096 mV = 1 mV per LSB), minimizing software correction and simplifying gain calibration in ADC/DAC interfaces - a key advantage over generic 4.0 V or 5.0 V references in high-resolution measurement designs.

LM4040D41ILPE3 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Package/Case:: TO-226-3, TO-92-3 (TO-226AA)

Series:: -

Packaging:: Bulk

Product Status:: Obsolete

Reference Type:: Shunt

Output Type:: Fixed

Voltage - Output (Min/Fixed):: 4.096V

Voltage - Output (Max):: -

Current - Output:: 15 mA

Tolerance:: ±1%

Temperature Coefficient:: 150ppm/°C

Noise - 0.1Hz to 10Hz:: -

Noise - 10Hz to 10kHz:: 80µVrms

Voltage - Input:: -

Current - Supply:: -

Current - Cathode:: 88 µA

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

LM4040D41ILPE3 FAQ

1.How can I place an order for LM4040D41ILPE3 through Aetrix?

Please submit a Request for Quotation (RFQ) for LM4040D41ILPE3 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 LM4040D41ILPE3 reliable?

The price and inventory of LM4040D41ILPE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040D41ILPE3 is usually 5 days.

3.What payment methods are accepted for LM4040D41ILPE3?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040D41ILPE3 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LM4040D41ILPE3?

LM4040D41ILPE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LM4040D41ILPE3 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 LM4040D41ILPE3?

For technical support, including LM4040D41ILPE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040D41ILPE3 requirements.

6.How does Aetrix verify that LM4040D41ILPE3 is sourced from the original manufacturer or authorized distributors?

All LM4040D41ILPE3 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 LM4040D41ILPE3 meets industry standards.

7.What is the process for return or replacement of LM4040D41ILPE3?

All LM4040D41ILPE3 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040D41ILPE3, 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 LM4040D41ILPE3 part is unused and in its original packaging.

Return procedure for LM4040D41ILPE3:

1.Submit a request within 90 days.

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

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