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 LM4041CICT-1.2

Name: LM4041CICT-1.2
Brand: STMicroelectronics
SKU: LM4041CICT-1.2
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: LM4041CICT-1.2

Manufacturer:: STMicroelectronics

Category:: Voltage Reference

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

Datasheet:: LM4041CICT-1.2.pdf

Description:: IC VREF SHUNT 0.5% SOT323-5

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,075

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

Product details

Overview

LM4041CICT-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 +85 °C in SOT323-5L package and serves as a compact, low-power reference in battery-operated instrumentation and energy management systems.

For engineers reviewing the LM4041CICT-1.2 datasheet, LM4041CICT-1.2 pinout, LM4041CICT-1.2 application, or LM4041CICT-1.2 equivalent, key selection criteria include shunt reference stability under capacitive loads, thermal drift performance in industrial temperature range, and compatibility with space-constrained PCB layouts using SOT323-5L footprint.

Technical Context

The LM4041CICT-1.2 functions as a two-terminal shunt reference, requiring only an external cathode resistor to set operating current. Its internal bandgap core achieves high initial accuracy without trimming resistors, and its low dynamic impedance (≤1 Ω) ensures minimal output variation over 100 µA–1 mA current changes.

Designed for direct replacement of Zener diodes in low-power regulation, it maintains stability with ≥1 µF capacitive loads and exhibits wideband noise of 60 µV_RMS (10 Hz–10 kHz), making it suitable for precision ADC biasing and sensor excitation where noise-sensitive analog front-ends are used.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	1.225 V typical; ±0.5% tolerance at 25 °C ensures predictable system-level calibration without post-fabrication trimming.
Operating Current	40 µA min at 25 °C; enables operation from microampere-level supply rails in always-on sensor nodes.
Temp Coefficient	100 ppm/°C max; limits output drift to ±0.12 mV over full -40 to +85 °C range for stable 12-bit ADC references.
Dynamic Impedance	1 Ω max at 100 µA–1 mA; minimizes load-induced voltage shift in varying-current applications like battery fuel gauging.
Noise (10 Hz–10 kHz)	60 µV_RMS; supports high-resolution data acquisition without added filtering overhead.
Capacitive Load Stability	Stable with ≥1 µF; eliminates need for isolation resistors when driving ADC input capacitors or LDO feedback networks.

Pinout & Package

LM4041CICT-1.2 is housed in a 5-pin SOT323-5L surface-mount package (3.2 × 1.8 × 1.1 mm). Pins 1, 3, and 5 form the functional cathode-anode-cathode configuration; pins 2 and 4 are internally connected to the anode and must be left floating or tied to pin 1 for improved noise immunity per ST layout guidance.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Cathode)	Reference output node	Main current sink path; connects to system ground via external resistor to set operating current and define reference voltage.
Pin 3 (Anode)	Reference return node	Connects directly to system ground; forms closed shunt loop with pin 1 and external resistor.
Pin 5 (Cathode)	Redundant cathode terminal	Internally tied to pin 1; provides additional solder joint reliability and lower parasitic inductance in high-frequency layouts.
Pins 2 & 4	Anode tie points	Internally connected to pin 3; must be left floating or shorted to pin 3 to reduce PCB trace inductance and improve EMI rejection.

Key Features

Feature	Design Value
Ultra-low quiescent current	40 µA minimum ensures >10-year battery life in coin-cell-powered IoT sensors operating at 1 µA average system current.
Capacitive load immunity	Stable with ≥1 µF output capacitance eliminates need for series isolation resistors in ADC reference buffers.
Industrial temperature range	-40 to +85 °C operation supports deployment in uncontrolled environments such as smart meter enclosures and outdoor gateways.
Low wideband noise	60 µV_RMS (10 Hz–10 kHz) enables direct use in 16-bit SAR ADC reference paths without noise-filtering components.

Applications

Battery Fuel Gauging

Portable Medical Sensors

Use Scenario: Real-time monitoring of lithium-ion cell voltage during charge/discharge cycles in handheld diagnostic devices.

IC Role / Device Role / Timing Role: Shunt reference providing stable 1.225 V reference for 12-bit ADC measuring cell voltage with <±1 mV error budget.

Use Value: 40 µA operating current extends single-CR2032 battery life beyond 3 years while maintaining ±0.5% reference accuracy across operating temperature.

Use Scenario: Low-power pulse oximetry sensor module powered by AAA batteries with continuous SpO₂ sampling every 5 seconds.

IC Role / Device Role / Timing Role: Precision voltage reference for transimpedance amplifier biasing and photodiode signal conditioning circuitry.

Use Value: 100 ppm/°C tempco ensures <±0.8 mV drift over patient-body-temperature range (32–42 °C), preserving clinical-grade saturation accuracy.

Smart Energy Meters

Industrial Data Loggers

Use Scenario: Revenue-grade electricity meter with metrology ASIC requiring stable reference for current/voltage channel calibration.

IC Role / Device Role / Timing Role: Primary shunt reference feeding metrology ADC inputs and internal DAC calibration loops.

Use Value: Long-term stability of 120 ppm over 1000 hours prevents recalibration drift in field-deployed meters meeting IEC 62053-21 Class 0.5S requirements.

Use Scenario: Ruggedized environmental logger deployed in remote substations recording temperature, humidity, and voltage waveforms over 10-year service life.

IC Role / Device Role / Timing Role: Reference source for isolated sigma-delta ADCs digitizing AC mains voltage and current transformers.

Use Value: SOT323-5L package withstands thermal cycling stress in non-climate-controlled enclosures while maintaining 1.225 V output within ±0.5% over full industrial temperature range.

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	Adjustable output (2.5–36 V); 1% initial accuracy; 90 ppm/°C tempco; 80 µA min operating current	Requires external resistor divider; higher current draw reduces battery life in ultra-low-power designs	Select when adjustable reference voltage or higher output voltage is required; avoid when fixed 1.225 V and sub-50 µA operation are mandatory
MAX6008AEUR+T	Fixed 1.25 V output; ±0.2% accuracy; 75 ppm/°C tempco; 35 µA min operating current	SOT23-3 package only; no redundant cathode terminals; slightly tighter accuracy but different nominal voltage	Prefer for highest accuracy in space-constrained SOT23-3 layouts; verify 1.25 V vs. 1.225 V impact on system gain calibration

Compared with TLVH431ACDBVR and MAX6008AEUR+T, LM4041CICT-1.2 uniquely combines fixed 1.225 V output, SOT323-5L layout flexibility with dual cathode terminals, and guaranteed 40 µA operation-making it optimal for battery-powered instrumentation where voltage, current, and package constraints align precisely.

Availability

LM4041CICT-1.2 is available at Aetrix Electronics and suitable for battery-operated equipment, energy management systems, and portable medical sensors requiring stable component supply with guaranteed long-term availability and consistent parametric performance.

Supply support for LM4041CICT-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 analog, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.

The LM4041 belongs to ST's precision analog reference product line, engineered specifically for space- and power-constrained applications demanding high accuracy, low drift, and robust capacitive-load stability without external compensation.

FAQ

What is the maximum cathode voltage rating for LM4041CICT-1.2?

The absolute maximum cathode voltage is 8 V, as specified in ST's datasheet Table 1. Exceeding this voltage risks permanent device damage. In normal operation, the cathode voltage equals the reference output (1.225 V) plus the IR drop across the external current-setting resistor, so design must ensure total cathode potential stays below 8 V even at maximum supply and minimum load conditions.

Can LM4041CICT-1.2 drive a 10 nF capacitor directly without oscillation?

Yes - the LM4041CICT-1.2 is explicitly characterized for stability with capacitive loads ≥1 µF, and 10 nF is well within that margin. Its internal compensation ensures phase margin remains sufficient even with small capacitors, eliminating need for series isolation resistors in most sensor interface or ADC decoupling applications.

How does the SOT323-5L package improve thermal performance versus SOT23-3L?

The SOT323-5L package has lower thermal resistance junction-to-ambient (233 °C/W vs. 248 °C/W for SOT23-3L), enabling ~6% higher power dissipation at the same ambient temperature. More critically, pins 2 and 4 provide additional anode connection points, reducing PCB trace inductance and improving thermal spreading across the copper pour, which enhances long-term stability in thermally cycled environments.

Is LM4041CICT-1.2 qualified for automotive applications?

No - LM4041CICT-1.2 is rated for industrial temperature range (-40 to +85 °C) only and is not AEC-Q100 qualified. ST offers automotive-grade variants (e.g., LM4041CECT-1.2) with extended -40 to +125 °C operation and additional qualification testing, but LM4041CICT-1.2 is intended for industrial, medical, and consumer equipment where automotive reliability standards do not apply.

LM4041CICT-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 ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-323-5

LM4041CICT-1.2 FAQ

1.How can I place an order for LM4041CICT-1.2 through Aetrix?

Please submit a Request for Quotation (RFQ) for LM4041CICT-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 LM4041CICT-1.2 reliable?

The price and inventory of LM4041CICT-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 LM4041CICT-1.2 is usually 5 days.

3.What payment methods are accepted for LM4041CICT-1.2?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041CICT-1.2 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LM4041CICT-1.2?

LM4041CICT-1.2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LM4041CICT-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 LM4041CICT-1.2?

For technical support, including LM4041CICT-1.2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041CICT-1.2 requirements.

6.How does Aetrix verify that LM4041CICT-1.2 is sourced from the original manufacturer or authorized distributors?

All LM4041CICT-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 LM4041CICT-1.2 meets industry standards.

7.What is the process for return or replacement of LM4041CICT-1.2?

All LM4041CICT-1.2 units undergo pre-shipment inspection (PSI). If there is an issue with LM4041CICT-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 LM4041CICT-1.2 part is unused and in its original packaging.

Return procedure for LM4041CICT-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…