Analog Devices Inc./Maxim Integrated LM4040AEM3-5.0+T

Overview

LM4040AEM3-5.0+T from Maxim Integrated is a precision 5.000V two-terminal shunt voltage reference in SC70-3 package, featuring 0.1% initial accuracy, ±100ppm/°C temperature coefficient over –40°C to +125°C, 60μA–15mA operating current range, and 80µVRMS wideband noise (10Hz–10kHz). It serves as a stable reference in high-reliability power management circuits for automotive and industrial systems.

For engineers reviewing the LM4040AEM3-5.0+T datasheet, LM4040AEM3-5.0+T pinout, LM4040AEM3-5.0+T application, or LM4040AEM3-5.0+T equivalent, key selection criteria include guaranteed extended-temperature operation, no-output-capacitor stability, low dynamic impedance (≤1.1Ω), AEC-Q100 qualification eligibility, and SC70 footprint compatibility with space-constrained PCB layouts.

Technical Context

The LM4040AEM3-5.0+T implements a laser-trimmed bandgap shunt reference architecture, delivering fixed 5.000V reverse breakdown voltage with minimal load regulation error (≤15mV across 1mA–15mA) and line regulation error (≤15mV across supply variations). Its internal pass transistor sinks current to maintain regulation without requiring external stabilization components.

Designed for extended-temperature environments, it guarantees performance from –40°C to +125°C with thermal drift bounded by ±100ppm/°C and long-term stability of 120ppm over 1000 hours. The device tolerates any capacitive load and exhibits stable output impedance below 10Ω up to 100kHz at 1mA shunt current.

Key Specifications

Pinout & Package

LM4040AEM3-5.0+T uses the 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23. 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 MAX6008AEUR+T, LM4040AEM3-5.0+T offers superior initial accuracy (0.1% vs. 0.2–0.5%), guaranteed +125°C operation, and AEC-Q100 qualification path - making it optimal for automotive and high-reliability embedded systems where reference stability directly impacts functional safety compliance.

Availability

LM4040AEM3-5.0+T is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor transmitters, portable medical devices, and high-reliability data acquisition systems requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for LM4040AEM3-5.0+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, designs precision analog and mixed-signal ICs for demanding industrial, automotive, and communications applications.

The LM4040 product line delivers micropower, high-accuracy shunt voltage references optimized for space-constrained, high-reliability systems where stability, low noise, and extended-temperature operation are critical.

FAQ

What is the guaranteed operating temperature range for LM4040AEM3-5.0+T?

The LM4040AEM3-5.0+T is fully specified and guaranteed over –40°C to +125°C. This extended temperature range is confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables, and applies specifically to the "E" grade (e.g., LM4040AEM3-5.0+T), distinguishing it from the "I" grade (–40°C to +85°C). Thermal performance remains within datasheet limits without derating.

Does LM4040AEM3-5.0+T require an external output capacitor for stability?

No, LM4040AEM3-5.0+T does not require an external output capacitor. The device is internally compensated and remains stable with any capacitive load, including zero capacitance. This is explicitly stated in the General Description and Applications Information sections, and verified in Typical Operating Characteristics (e.g., Output Impedance vs. Frequency plots).

What is the pin configuration and function of pin 3 on LM4040AEM3-5.0+T?

LM4040AEM3-5.0+T uses a 3-pin SC70 package with pin 1 = (+), pin 2 = (–), and pin 3 = N.C. (No Connection). Per the Pin Description and Pin Configuration diagrams, pin 3 must be left unconnected or tied to pin 2 - it has no internal connection and serves only as a mechanical placeholder. Incorrect connection to other nodes may introduce leakage or instability.

How does the 0.1% initial accuracy of LM4040AEM3-5.0+T translate to absolute voltage tolerance at 5.000V?

The 0.1% initial accuracy of LM4040AEM3-5.0+T corresponds to ±5.0mV tolerance at 5.000V (i.e., 4.995V to 5.005V at +25°C), as confirmed in the Electrical Characteristics table for the 5.000V version. This tolerance is guaranteed for all units in the A-grade bin and is laser-trimmed during production - no post-manufacturing calibration is needed to achieve this specification.

Is LM4040AEM3-5.0+T qualified to AEC-Q100 standards?

LM4040AEM3-5.0+T is offered in AEC-Q100 qualified variants (denoted by "/V" suffix, e.g., LM4040AEM3-5.0/V+T). While the base LM4040AEM3-5.0+T part is built on the same process and shares the same extended-temperature rating, formal AEC-Q100 qualification applies only to /V-marked versions. Customers requiring automotive qualification must select the /V variant and confirm test reports with Maxim/Analog Devices.