Analog Devices Inc./Maxim Integrated MAX9041AESA+

Overview

MAX9041AESA+ from Analog Devices is a micropower single-supply comparator with integrated 2.048V precision voltage reference in an 8-pin SO package. It features rail-to-rail inputs/outputs, 40μA supply current at 5V, 400ns propagation delay, ±0.5mV typical input offset voltage, and internal ±3mV hysteresis - enabling precise threshold detection in low-power battery management and sensor interface applications.

For engineers reviewing the MAX9041AESA+ datasheet, MAX9041AESA+ pinout, MAX9041AESA+ application, or MAX9041AESA+ equivalent, key selection criteria include its A-grade 0.4% initial reference accuracy, 6ppm/°C tempco, rail-to-rail output sourcing/sinking capability (8mA), and compatibility with capacitive loads up to 4.7nF on the REF pin.

Technical Context

The MAX9041AESA+ integrates a single high-precision comparator and a laser-trimmed series-mode voltage reference sharing a common 2.5V–5.5V supply. Its input stage supports common-mode voltages from VEE − 0.25V to VCC + 0.25V, with 1.0pA typical input bias current and 2.5pF input capacitance.

The comparator employs a push-pull output stage delivering rail-to-rail swing and capable of sinking/source 8mA, while the reference uses curvature correction and thin-film resistors to achieve 6ppm/°C typical temperature coefficient and stability with up to 4.7nF load capacitance.

Key Specifications

Pinout & Package

MAX9041AESA+ is housed in an 8-pin Small Outline (SO) package with standard 1.27mm pitch and surface-mount footprint per outline 21-0041.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar comparator + reference applications.

Compared with MAX9041BESA+, the MAX9041AESA+ delivers 2.5× better reference accuracy and 16× lower tempco - essential for precision industrial trip points. Versus TLV4041IDBVR, it provides 80× higher output drive and a 2.048V reference that aligns directly with 12-bit ADC/DAC full-scale, eliminating scaling resistors.

Availability

MAX9041AESA+ is available at Aetrix Electronics and suitable for precision battery management, window comparator circuits, IR receiver modules, level translation interfaces, and sensor signal conditioning requiring stable component supply across industrial temperature ranges.

Supply support for MAX9041AESA+ 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

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The MAX9038–MAX9053 family was designed to integrate precision voltage references with ultra-low-power comparators in miniature packages - targeting space-constrained, battery-operated systems demanding long-term stability and minimal supply current.

FAQ

What is the reference voltage accuracy and temperature coefficient of the MAX9041AESA+?

The MAX9041AESA+ features an A-grade 2.048V reference with ±0.4% initial accuracy over temperature and a typical temperature coefficient of 6ppm/°C. These specifications are guaranteed across the −40°C to +85°C operating range and enable stable threshold generation in precision sensing applications without external calibration.

Does the MAX9041AESA+ have rail-to-rail input and output capability?

Yes, the MAX9041AESA+ supports rail-to-rail inputs with a common-mode range extending 250mV beyond both supply rails (VEE − 0.25V to VCC + 0.25V), and a rail-to-rail push-pull output stage that can source and sink up to 8mA. This allows full utilization of supply voltage headroom in low-voltage systems.

What is the maximum capacitive load supported on the REF pin of the MAX9041AESA+?

The MAX9041AESA+ REF pin is stable with capacitive loads up to 4.7nF, as confirmed in the datasheet's Electrical Characteristics table and Typical Operating Characteristics. This allows local filtering without risk of oscillation, though capacitors are optional unless transient load steps require improved settling behavior.

How does the internal hysteresis of the MAX9041AESA+ affect its use in noisy environments?

The MAX9041AESA+ includes fixed ±3mV internal hysteresis, which prevents output chatter when input signals cross the threshold slowly or contain noise near the trip point. This eliminates the need for external positive feedback resistors in most applications, simplifying design and improving reliability in electrically noisy industrial settings.

Can the MAX9041AESA+ operate from a 2.5V supply, and what is its supply current at that voltage?

Yes, the MAX9041AESA+ operates from 2.5V to 5.5V. At 2.7V supply, its typical supply current is 47μA; at 2.5V (minimum specified), current remains within the 40–67μA range per datasheet Electrical Characteristics - confirming robust micropower operation even at the lower supply limit.