Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

STMicroelectronics LM4041CECT-1.2

Name: LM4041CECT-1.2
Brand: STMicroelectronics
SKU: LM4041CECT-1.2
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: LM4041CECT-1.2

Manufacturer:: STMicroelectronics

Category:: Voltage Reference

Package:: 5-TSSOP, SC-70-5, SOT-353

Datasheet:: LM4041CECT-1.2.pdf

Description:: IC VREF SHUNT 0.5% SOT323-5

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:1,638

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

LM4041CECT-1.2 from STMicroelectronics is a precision micropower shunt voltage reference delivering a stable 1.225 V output with ±0.5% initial accuracy at 25 °C, 100 ppm/°C max temperature coefficient, and ultra-low 40 µA operating current. It operates across –40 to +125 °C and is packaged in SOT323-5L for space-constrained battery-powered instrumentation and energy management systems.

For engineers reviewing the LM4041CECT-1.2 datasheet, LM4041CECT-1.2 pinout, LM4041CECT-1.2 application, or LM4041CECT-1.2 equivalent, key selection criteria include shunt reference stability under capacitive loads, low-current regulation capability down to 40 µA, extended temperature range suitability, and SOT323-5L footprint compatibility in compact power monitoring designs.

Technical Context

The LM4041CECT-1.2 functions as a two-terminal shunt reference, sinking current to maintain a precise 1.225 V cathode-to-anode voltage. Its operation requires an external current source and load resistor, with regulation established when cathode current exceeds 40 µA across –40 to +125 °C.

It exhibits 0.4 Ω typical static impedance (ΔIk = 100 µA to 1 mA), 60 µV_RMS wideband noise (10 Hz–10 kHz), and maintains stability with ≥1 µF capacitive loads-enabling direct integration into ADC reference inputs and SMPS feedback networks without series isolation.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	1.225 V nominal; ±0.5% tolerance at 25 °C ensures accurate ADC reference or feedback setpoint in precision analog circuits.
Operating Current	40 µA minimum; enables operation in ultra-low-power battery systems where supply current must stay below 50 µA.
Temp Coefficient	100 ppm/°C max; limits voltage drift to ≤1.2 mV over full –40 to +125 °C range for industrial-grade stability.
Static Impedance	0.4 Ω typical; minimizes load-induced error in high-impedance sensing nodes and improves PSRR in regulator feedback paths.
Noise (10 Hz–10 kHz)	60 µV_RMS; supports high-resolution data acquisition without added filtering in 12–16-bit measurement systems.
Capacitive Load Stability	Stable with ≥1 µF; allows direct connection to ADC reference pins or LDO input bypass caps without oscillation risk.

Pinout & Package

LM4041CECT-1.2 is housed in a 5-pin SOT323-5L surface-mount package. Pins 1, 3, and 5 are internally connected to the cathode; pins 2 and 4 are tied to the anode and must be left floating or shorted to pin 1 for optimal noise immunity per PCB layout.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Cathode)	Main current-sinking terminal	Primary connection point for reference current path; voltage regulated at 1.225 V relative to anode.
Pins 2 & 4 (Anode)	Reference ground node	Must be tied together and connected to system ground; floating or shorted to Pin 1 improves EMI rejection.
Pins 3 & 5 (Cathode)	Redundant cathode terminals	Provide parallel current paths to reduce thermal resistance and improve layout flexibility in high-density boards.

Key Features

Feature	Design Value
Micropower operation	40 µA min operating current enables >10-year battery life in coin-cell–powered sensors and portable meters.
Extended temperature range	–40 to +125 °C operation supports deployment in automotive engine control modules and industrial motor drives.
Low tempco	100 ppm/°C max ensures <±1.5 mV total drift across full range-critical for uncalibrated field instruments.
Capacitive load tolerance	Stable with ≥1 µF output capacitance eliminates need for external series resistors in ADC reference buffers.
Small-footprint packaging	SOT323-5L (2.0 × 2.1 mm) saves >40% board area vs. SOIC-8 references in space-limited IoT edge nodes.

Applications

Battery-Powered Data Loggers

Switch-Mode Power Supply Feedback

Use Scenario: Long-term environmental monitoring using coin-cell batteries and 16-bit SAR ADCs.

IC Role / Device Role / Timing Role: Shunt reference providing stable 1.225 V reference voltage for ADC conversion and sensor biasing.

Use Value: 40 µA operating current extends battery life beyond 5 years; 60 µV_RMS noise avoids resolution loss in sub-mV measurements.

Use Scenario: Isolated flyback converter with optocoupler feedback and TL431 replacement.

IC Role / Device Role / Timing Role: Precision shunt reference setting output voltage via resistor divider on secondary side.

Use Value: ±0.5% accuracy and 100 ppm/°C tempco enable ±1.2% output regulation over temperature-tighter than standard TL431 designs.

Portable Medical Sensors

Energy Management ICs

Use Scenario: Wearable pulse oximeter with analog front-end and low-noise signal chain.

IC Role / Device Role / Timing Role: Low-noise voltage reference for transimpedance amplifier bias and ADC reference rail.

Use Value: 60 µV_RMS noise prevents SNR degradation in photodiode current measurement; SOT323-5L fits within 3×3 mm module footprint.

Use Scenario: Smart battery gauge IC requiring accurate cell voltage monitoring in multi-cell packs.

IC Role / Device Role / Timing Role: Stable reference for internal ADC used to measure pack voltage and current sense amplifier gain calibration.

Use Value: 0.4 Ω static impedance minimizes loading error during fast transient current sampling; –40 to +125 °C rating covers under-hood automotive environments.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLVH431ACDBVR	2.5 V fixed output; 80 µA min operating current; ±0.5% accuracy; SOT23-5 package	Requires external resistor divider to scale down to 1.225 V; higher current draw reduces battery life	Select when 2.5 V reference is acceptable or when existing design uses TLVH431 footprint and scaling is feasible
MAX6008AEUR+T	1.25 V output; ±0.2% accuracy; 35 µA max quiescent current; SOT23-3 package	Higher initial accuracy but narrower –40 to +85 °C range; no anode redundancy for noise immunity	Select for higher-accuracy industrial systems operating only up to +85 °C and where SOT23-3 layout reuse is critical

Compared with TLVH431ACDBVR and MAX6008AEUR+T, LM4041CECT-1.2 uniquely combines true 1.225 V output, extended temperature range, redundant anode pins for noise suppression, and proven stability with large capacitive loads-making it optimal for compact, battery-critical, and thermally demanding applications.

Availability

LM4041CECT-1.2 is available at Aetrix Electronics and suitable for battery-operated equipment, energy management systems, and portable instrumentation requiring stable component supply with guaranteed long-term availability and consistent parametric performance.

Supply support for LM4041CECT-1.2 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, analog components, and MEMS sensors for industrial, automotive, and consumer markets.

LM4041CECT-1.2 belongs to ST's precision analog reference product line, engineered specifically for ultra-low-power, high-stability voltage referencing in space- and energy-constrained systems-from portable medical devices to automotive body electronics.

FAQ

What is the minimum cathode current required for regulation at –40 °C?

At –40 °C, the LM4041CECT-1.2 requires a minimum cathode current of 50 µA to maintain regulation, as specified in Table 3 of the datasheet. This is higher than the 40 µA typical value at 25 °C due to increased bandgap-related leakage at low temperatures, and must be accounted for in worst-case current-source design.

Can LM4041CECT-1.2 drive a 10 nF capacitor directly without instability?

Yes-LM4041CECT-1.2 is explicitly characterized for stability with ≥1 µF capacitive loads, and 10 nF falls well within its stable operating region. The device's low output impedance and internal compensation eliminate need for series resistance or isolation, unlike many older shunt references.

How does the SOT323-5L pin configuration improve noise immunity?

The SOT323-5L package provides two dedicated anode pins (2 and 4) that can be shorted to the cathode (pin 1) to form a local ground loop, reducing PCB trace inductance and minimizing high-frequency noise coupling. This layout technique is validated in ST's application notes for EMI-sensitive measurement circuits.

Is LM4041CECT-1.2 qualified for automotive applications?

No-LM4041CECT-1.2 is rated for extended industrial temperature range (–40 to +125 °C) but is not AEC-Q100 qualified. For automotive use, ST offers the pin-compatible LM4041QCECT-1.2 variant, which includes automotive-grade screening, enhanced ESD robustness (8 kV HBM), and PPAP documentation support.

LM4041CECT-1.2 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 5-TSSOP, SC-70-5, SOT-353

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:: ±0.5%

Temperature Coefficient:: 100ppm/°C

Noise - 0.1Hz to 10Hz:: -

Noise - 10Hz to 10kHz:: 60µVrms

Voltage - Input:: -

Current - Supply:: -

Current - Cathode:: 50 µA

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-323-5

LM4041CECT-1.2 FAQ

1.How can I place an order for LM4041CECT-1.2 through Aetrix?

Please submit a Request for Quotation (RFQ) for LM4041CECT-1.2 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 LM4041CECT-1.2 reliable?

The price and inventory of LM4041CECT-1.2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041CECT-1.2 is usually 5 days.

3.What payment methods are accepted for LM4041CECT-1.2?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041CECT-1.2 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LM4041CECT-1.2?

LM4041CECT-1.2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LM4041CECT-1.2 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 LM4041CECT-1.2?

For technical support, including LM4041CECT-1.2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041CECT-1.2 requirements.

6.How does Aetrix verify that LM4041CECT-1.2 is sourced from the original manufacturer or authorized distributors?

All LM4041CECT-1.2 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 LM4041CECT-1.2 meets industry standards.

7.What is the process for return or replacement of LM4041CECT-1.2?

All LM4041CECT-1.2 units undergo pre-shipment inspection (PSI). If there is an issue with LM4041CECT-1.2, 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 LM4041CECT-1.2 part is unused and in its original packaging.

Return procedure for LM4041CECT-1.2:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…