Analog Devices Inc./Maxim Integrated LM4040CEM3-5.0/V+T

Overview

LM4040CEM3-5.0/V+T from Maxim Integrated is a precision 5.000V two-terminal shunt voltage reference in SC70-3 package, featuring 0.5% initial accuracy, ±100ppm/°C temperature coefficient, and guaranteed operation from –40°C to +125°C. It delivers stable reverse-breakdown voltage with 60μA to 15mA shunt current capability and low 80μVRMS wideband noise (10Hz–10kHz), ideal for high-reliability automotive power-supply monitoring and sensor biasing circuits.

For engineers reviewing the LM4040CEM3-5.0/V+T datasheet, LM4040CEM3-5.0/V+T pinout, LM4040CEM3-5.0/V+T application, or LM4040CEM3-5.0/V+T equivalent, key selection criteria include AEC-Q100 qualification, no-output-capacitor stability, subminiature SC70 footprint, and tight thermal drift performance across extended industrial temperature range.

Technical Context

The LM4040CEM3-5.0/V+T uses bandgap-based shunt architecture to maintain a fixed 5.000V reverse breakdown voltage without external capacitors. Its internal laser-trimmed resistor network ensures precise initial accuracy, while dynamic impedance remains ≤1.1Ω at 1mA (120Hz), enabling stable regulation under varying load currents.

Designed for automotive-grade reliability, the /V suffix denotes AEC-Q100 qualification. The device tolerates capacitive loads and operates stably over full –40°C to +125°C junction temperature range, with maximum 20mA absolute reverse current rating and 120ppm long-term voltage stability after 1000 hours.

Key Specifications

Pinout & Package

LM4040CEM3-5.0/V+T is housed in a RoHS-compliant, lead(Pb)-free 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23 equivalents. Pin 3 is NC and must be left unconnected or tied to pin 2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLVH431ACDBVR and ADR3450ARJZ-R7, LM4040CEM3-5.0/V+T offers the only combination of fixed 5.000V output, AEC-Q100 qualification, zero-external-component operation, and SC70 footprint-making it uniquely suited for space- and reliability-constrained automotive and industrial shunt reference designs.

Availability

LM4040CEM3-5.0/V+T is available at Aetrix Electronics and suitable for automotive power monitoring, industrial sensor biasing, portable medical devices, and energy metering applications requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for LM4040CEM3-5.0/V+T 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

Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, communications, and computing markets.

The LM4040 product line delivers precision micropower shunt voltage references optimized for space-constrained, high-reliability applications demanding stable reference voltages without external components-especially in automotive and industrial environments.

FAQ

What is the operating temperature range for LM4040CEM3-5.0/V+T?

The LM4040CEM3-5.0/V+T is rated for continuous operation from –40°C to +125°C ambient temperature. This extended range is validated per AEC-Q100 Grade 1 requirements, making it suitable for under-hood automotive applications and harsh industrial environments where thermal stability is critical. The device maintains its 5.000V output and 0.5% accuracy across this full range.

Does LM4040CEM3-5.0/V+T require an external capacitor for stability?

No, LM4040CEM3-5.0/V+T does not require an external output capacitor for stability. Its internal design ensures unconditional stability with any capacitive load, including direct connection to large bulk capacitors or long PCB traces. This eliminates BOM cost, saves board space, and simplifies layout-particularly valuable in compact automotive modules and portable medical devices.

What does the "/V+T" suffix mean in LM4040CEM3-5.0/V+T?

The "/V" suffix indicates AEC-Q100 qualification for automotive applications, confirming reliability testing per stress test conditions for Grade 1 (–40°C to +125°C). The "+T" denotes RoHS-compliant, lead(Pb)-free packaging in tape-and-reel format. Together, they signify that LM4040CEM3-5.0/V+T meets automotive quality and environmental standards for production deployment.

How does LM4040CEM3-5.0/V+T compare to the LM4040CIM3-5.0+T variant?

LM4040CEM3-5.0/V+T and LM4040CIM3-5.0+T share identical electrical specs (0.5% accuracy, 5.000V output, SC70-3 package), but differ in qualification and temperature range: LM4040CEM3-5.0/V+T is AEC-Q100 qualified and rated for –40°C to +125°C, whereas LM4040CIM3-5.0+T is commercial-grade (–40°C to +85°C) and lacks automotive validation. Use LM4040CEM3-5.0/V+T for automotive or extended-temperature industrial use.

What is the minimum shunt current required for LM4040CEM3-5.0/V+T to regulate properly?

The LM4040CEM3-5.0/V+T requires a minimum shunt current of 60μA to maintain regulation at 5.000V. This value is guaranteed across the full –40°C to +125°C temperature range and applies to all grades. Designers must ensure the series resistor (RS) and supply voltage (VS) combination sustains ≥60μA under worst-case conditions (min VS, max load current) to avoid reference dropout.