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

STMicroelectronics LM4040CELT-5.0

Name: LM4040CELT-5.0
Brand: STMicroelectronics
SKU: LM4040CELT-5.0
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LM4040CELT-5.0

Manufacturer:: STMicroelectronics

Category:: Voltage Reference

Package:: SC-70, SOT-323

Datasheet:: LM4040CELT-5.0.pdf

Description:: IC VREF SHUNT 5V SC70

Quantity:: RFQ Add To RFQ list

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Inventory:1,242

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Product details

Overview

LM4040CELT-5.0 from STMicroelectronics is a precision micropower shunt voltage reference delivering a stable 5.0 V output with ±0.5% initial accuracy at 25 °C, 70 ppm/°C max temperature coefficient, and ultra-low 10 µA operating current. It operates across -40 to +125 °C and supports capacitive loads without instability-used in high-resolution ADC biasing and portable sensor signal conditioning.

For engineers reviewing the LM4040CELT-5.0 datasheet, LM4040CELT-5.0 pinout, LM4040CELT-5.0 application, or LM4040CELT-5.0 equivalent, key selection criteria include shunt reference stability under low-current operation, thermal hysteresis (120 ppm), low-frequency noise (10 µVp-p), and SOT23-3L footprint compatibility for space-constrained PCB layouts.

Technical Context

The LM4040CELT-5.0 functions as a two-terminal shunt reference, regulating voltage by sinking adjustable cathode current while maintaining precise reverse breakdown behavior. Its bandgap-derived core achieves 5.0 V output with 0.5% tolerance and 70 ppm/°C tempco over full industrial range.

It exhibits 0.15–0.3 Ω static impedance (ΔIk = 10 µA to 10 mA), 10 µVp-p low-frequency noise (0.1–10 Hz), and stable performance with ≥1 µF capacitive loads-enabling direct use in data acquisition front-ends without external compensation.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	5.0 V nominal, ±0.5% initial accuracy at 25 °C - ensures consistent ADC reference level without trimming.
Operating Current	10 µA minimum, 15 mA maximum - enables battery-powered operation with >10-year runtime in µA-scale systems.
Tempco	≤70 ppm/°C - limits voltage drift to ±0.84 mV over -40 to +125 °C, critical for wide-temperature instrumentation.
Low-Frequency Noise	10 µVp-p (0.1–10 Hz) - preserves SNR in precision 24-bit sigma-delta ADC applications.
Static Impedance	0.15–0.3 Ω - minimizes load-induced error during dynamic current draw in multiplexed sensor arrays.
Thermal Hysteresis	120 ppm - guarantees repeatable voltage after thermal cycling, essential for calibration-critical test equipment.

Pinout & Package

SOT23-3L package: 3-pin surface-mount, 2.9 mm × 2.6 mm × 1.1 mm body, 0.95 mm pitch, RoHS-compliant ECOPACK2.

Pin/Terminal	Circuit Role	Design Meaning
1 (Anode)	Reference ground return path	Must be connected to system ground; forms current sink return for regulation loop.
2 (Cathode)	Output/reference node	Delivers regulated 5.0 V; connects to ADC REF+ or op-amp non-inverting input.
3 (NC)	No-connect terminal	Internally unconnected; must remain floating or tied to anode per datasheet guidance.

Key Features

Feature	Design Value
Ultra-low quiescent current	10 µA typical at 25 °C - extends battery life in wireless sensor nodes and handheld meters.
Capacitive-load stability	Stable with ≥1 µF output capacitance - eliminates need for series resistance or external compensation networks.
Industrial temperature range	-40 to +125 °C operation - supports deployment in automotive engine control modules and industrial PLC I/O stages.
Low thermal hysteresis	120 ppm - ensures voltage repeatability after thermal stress, vital for metrology-grade calibration references.

Applications

Portable Data Loggers

Industrial Sensor Transmitters

Use Scenario: Battery-powered environmental monitors logging temperature, humidity, and pressure over multi-year deployments.

IC Role / Device Role / Timing Role: Shunt reference supplying stable 5.0 V to SAR ADC and analog front-end op-amps.

Use Value: 10 µA operating current enables >5-year coin-cell operation; ±0.5% accuracy maintains measurement traceability without field recalibration.

Use Scenario: 4–20 mA loop-powered transmitters converting RTD or strain-gauge signals in factory automation.

IC Role / Device Role / Timing Role: Precision voltage reference for excitation and ADC bias in isolated analog signal chains.

Use Value: 70 ppm/°C tempco ensures <±1 LSB error over ambient temperature swings; SOT23-3L footprint fits tight 4–20 mA module PCBs.

Medical Patient Monitors

Automotive Cabin Sensors

Use Scenario: Portable ECG and pulse oximetry devices requiring low-noise, low-power analog signal conditioning.

IC Role / Device Role / Timing Role: Low-noise 5.0 V reference for instrumentation amplifiers and 24-bit delta-sigma ADCs.

Use Value: 10 µVp-p low-frequency noise prevents baseline wander in sub-Hz biopotential measurements.

Use Scenario: Occupancy and air quality sensors mounted near vehicle HVAC ducts with wide thermal exposure.

IC Role / Device Role / Timing Role: Stable reference for MEMS pressure and CO₂ sensor signal conditioning ICs.

Use Value: -40 to +125 °C rating and 120 ppm hysteresis ensure consistent calibration across cabin temperature extremes.

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 (2.5 V setpoint), ±0.5% accuracy, 80 ppm/°C, 80 µA min current	Requires external resistor divider; higher current demand reduces battery life	Select when programmable reference voltage is needed and board space allows extra resistors.
MAX6008AEUR+T	Fixed 5.0 V, ±0.2% accuracy, 50 ppm/°C, 35 µA min current, SOT23-3	Higher precision and lower tempco but 3.5× higher operating current	Choose for metrology-grade accuracy where power budget permits >30 µA continuous draw.

Compared with TLVH431ACDBVR and MAX6008AEUR+T, the LM4040CELT-5.0 uniquely balances ultra-low 10 µA operation, 0.5% accuracy, and SOT23-3L compatibility-making it optimal for space- and energy-constrained industrial and portable sensing nodes where fixed 5.0 V is acceptable.

Availability

LM4040CELT-5.0 is available at Aetrix Electronics and suitable for portable data loggers, industrial sensor transmitters, medical patient monitors, and automotive cabin sensors requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LM4040CELT-5.0 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, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The LM4040 belongs to ST's precision analog reference product line, engineered specifically for high-accuracy, low-power shunt regulation in space-constrained, thermally demanding applications-from portable instrumentation to under-hood automotive electronics.

FAQ

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

The LM4040CELT-5.0 requires 25 µA minimum cathode current (Ikmin) at -40 °C to maintain regulation, per Table 3 of DS13886 Rev 4. This increases from 10 µA at 25 °C due to bandgap curvature effects at temperature extremes.

Can the NC pin on the SOT23-3L package be grounded?

No-the NC pin (Pin 3) must remain unconnected or be tied to the anode (Pin 1) only, as specified in Figure 1 and the note on page 2 of DS13886. Grounding it may cause unpredictable regulation behavior or damage due to internal node contention.

How does load capacitance affect stability?

The LM4040CELT-5.0 remains stable with output capacitance up to 10 µF, as confirmed in Figure 11 (Stability plane vs. Cout). Instability occurs only below ~20 nF or above ~20 µF; 1 µF is the recommended value for optimal transient response and noise filtering.

Is the 5.0 V output guaranteed across the full -40 to +125 °C range?

Yes-the 5.0 V output is guaranteed within ±0.5% initial tolerance at 25 °C and exhibits ≤70 ppm/°C temperature coefficient, resulting in total variation of ≤±42 mV (±0.84%) over -40 to +125 °C, as validated in Table 4 and Figure 2 of DS13886 Rev 4.

LM4040CELT-5.0 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: SC-70, SOT-323

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Active

Reference Type:: Shunt

Output Type:: Fixed

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

Voltage - Output (Max):: -

Current - Output:: 15 mA

Tolerance:: ±0.5%

Temperature Coefficient:: 70ppm/°C

Noise - 0.1Hz to 10Hz:: 10µVp-p

Noise - 10Hz to 10kHz:: 95µVrms

Voltage - Input:: -

Current - Supply:: -

Current - Cathode:: 25 µA

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-323-3

LM4040CELT-5.0 FAQ

1.How can I place an order for LM4040CELT-5.0 through Aetrix?

Please submit a Request for Quotation (RFQ) for LM4040CELT-5.0 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 LM4040CELT-5.0 reliable?

The price and inventory of LM4040CELT-5.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040CELT-5.0 is usually 5 days.

3.What payment methods are accepted for LM4040CELT-5.0?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040CELT-5.0 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LM4040CELT-5.0?

LM4040CELT-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LM4040CELT-5.0 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 LM4040CELT-5.0?

For technical support, including LM4040CELT-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040CELT-5.0 requirements.

6.How does Aetrix verify that LM4040CELT-5.0 is sourced from the original manufacturer or authorized distributors?

All LM4040CELT-5.0 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 LM4040CELT-5.0 meets industry standards.

7.What is the process for return or replacement of LM4040CELT-5.0?

All LM4040CELT-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040CELT-5.0, 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 LM4040CELT-5.0 part is unused and in its original packaging.

Return procedure for LM4040CELT-5.0:

1.Submit a request within 90 days.

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

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