Analog Devices Inc./Maxim Integrated MAX9043AEUB-T

Overview

MAX9043AEUB-T from Analog Devices is a dual micropower comparator with integrated 2.048V precision voltage reference, operating from 2.5V to 5.5V supply. It delivers 55μA typical supply current, ±3mV internal hysteresis, rail-to-rail inputs extending 250mV beyond rails, and 400ns propagation delay at 100mV overdrive - ideal for low-power battery management and window detection in portable instrumentation.

For engineers reviewing the MAX9043AEUB-T datasheet, MAX9043AEUB-T pinout, MAX9043AEUB-T application, or MAX9043AEUB-T equivalent, key selection criteria include dual-comparator + reference integration in μMAX-10, A-grade 0.4% initial reference accuracy, 6ppm/°C tempco, and rail-to-rail push-pull outputs sourcing/sinking 8mA - critical for precision level translation and IR receiver front-ends.

Technical Context

The MAX9043AEUB-T integrates two independent comparators sharing one laser-trimmed series-mode voltage reference. Its input stage uses CMOS architecture with <1pA typical input bias current and ±0.5mV typical offset voltage, enabling high-impedance sensing across the full common-mode range (VEE − 0.25V to VCC + 0.25V).

The output stage employs a low-glitch push-pull design that limits supply current surges during switching, maintaining stable operation under dynamic loads. The reference features curvature correction and supports up to 500μA sink/source load current while remaining stable with capacitive loads up to 4.7nF.

Key Specifications

Pinout & Package

MAX9043AEUB-T is housed in a 10-pin μMAX package (5.0mm × 3.0mm × 1.1mm), RoHS-compliant, with exposed paddle for thermal enhancement.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX9042AEUA+, the MAX9043AEUB-T adds a second comparator without increasing supply current or package size - enabling true window detection in same footprint. Versus TLV3702IDR, it trades 1.2μA quiescent current for integrated 0.4%-accurate reference, simplifying design and improving threshold stability.

Availability

MAX9043AEUB-T is available at Aetrix Electronics and suitable for precision battery management, window comparators, IR receivers, and digital line receivers requiring stable component supply and long-term production continuity.

Supply support for MAX9043AEUB-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

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

The MAX9038–MAX9043 family was designed specifically for ultra-low-power, space-constrained applications requiring integrated precision references - targeting portable medical devices, IoT sensors, and battery-powered instrumentation.

FAQ

What is the reference voltage accuracy and temperature coefficient of the MAX9043AEUB-T?

The MAX9043AEUB-T features an A-grade 2.048V voltage reference with ±0.4% initial accuracy over temperature and a typical temperature coefficient of 6ppm/°C. This specification is guaranteed across the −40°C to +85°C operating range and enables stable threshold generation in precision analog monitoring circuits without external calibration.

Can the MAX9043AEUB-T operate from a 3.3V supply, and what is its supply current at that voltage?

Yes, the MAX9043AEUB-T operates from 2.5V to 5.5V, making 3.3V fully supported. At VCC = 3.3V, its typical supply current is 55μA - identical to the 5V value - due to its micropower CMOS design. This consistent current draw simplifies power budgeting across multiple supply domains in mixed-voltage systems.

Does the MAX9043AEUB-T require an external capacitor on the REF pin for stability?

No, the MAX9043AEUB-T reference output is stable without an external capacitor and supports capacitive loads up to 4.7nF. An output capacitor is optional and recommended only in transient-heavy environments (e.g., fast load steps) to reduce overshoot; omitting it saves board space and cost in static-sensing applications.

What is the maximum load current the REF pin can source or sink?

The REF pin of the MAX9043AEUB-T can source or sink up to ±500μA while maintaining specified accuracy and stability. Exceeding this current degrades reference voltage accuracy and increases output impedance; for higher loads, a buffer amplifier or dedicated reference buffer IC is recommended.

How does the internal hysteresis of the MAX9043AEUB-T affect its use in slow-moving signal detection?

The MAX9043AEUB-T includes fixed ±3mV internal hysteresis, which prevents output oscillation when input signals change slowly near the trip point - such as thermistor or potentiometer outputs. This eliminates the need for external positive-feedback resistors, simplifying circuit design and improving reliability in noisy or high-impedance sensor interfaces.