Analog Devices Inc./Maxim Integrated MAX40001ANT12+T

Overview

The MAX40001ANT12+T from Maxim Integrated is a nanoPower open-drain comparator with integrated 1.252V precision voltage reference, designed for ultra-low-power portable electronics requiring rail-to-rail input operation, sub-1µA supply current, and compact WLP packaging. It operates from 1.7V to 5.5V, delivers <10µs propagation delay, and supports automotive temperature range (–40°C to +125°C) - ideal for battery voltage monitoring in wearables and medical sensors.

For engineers reviewing the MAX40001ANT12+T datasheet, MAX40001ANT12+T pinout, MAX40001ANT12+T application, or MAX40001ANT12+T equivalent, key selection criteria include its 0.9µA typical supply current, 2.5mV internal hysteresis, 1.252V ±1% initial reference accuracy, –0.2V to VDD+0.2V input common-mode range, and compatibility with capacitive loads up to 100pF on the REF pin.

Technical Context

The MAX40001ANT12+T integrates a factory-trimmed bandgap reference (1.252V, ±1% at +25°C, <2.5% over –40°C to +125°C) and a high-impedance comparator core with 1.5pF input capacitance and ±1nA input bias current. Its input stage supports common-mode voltages extending 200mV beyond supply rails, enabling robust sensing of signals near or slightly outside VDD/GND boundaries.

The open-drain output stage allows level translation up to 5.5V independent of VDD and supports wired-OR configurations. Internal 2.5mV hysteresis eliminates oscillation during slow input transitions, while break-before-make switching minimizes supply-current surges - critical for stable operation in battery-powered systems with minimal bypassing.

Key Specifications

Pinout & Package

MAX40001ANT12+T is packaged in a 1.11mm × 0.76mm, 6-bump wafer-level package (WLP) with 0.35mm pitch, optimized for ultra-dense PCB layouts in portable devices.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV4041DPWR and MAX9060AXK+T, the MAX40001ANT12+T uniquely combines open-drain output, 0.9µA supply current, and 1.11mm × 0.76mm WLP packaging - delivering the smallest footprint and lowest power for battery-critical portable systems requiring level translation or fault aggregation.

Availability

MAX40001ANT12+T is available at Aetrix Electronics and suitable for battery voltage monitoring, wearable sensor interfaces, logic-level translation, and portable medical instrument alerts requiring stable component supply across automotive and industrial temperature ranges.

Supply support for MAX40001ANT12+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 power, sensing, and interface applications in demanding environments.

The MAX40000/MAX40001 family targets ultra-low-power portable electronics - delivering integrated reference comparators that reduce size, BOM count, and power in space- and energy-constrained devices like wearables and medical sensors.

FAQ

What is the reference voltage tolerance of the MAX40001ANT12+T over temperature?

The MAX40001ANT12+T features a factory-trimmed 1.252V reference with ±1% initial accuracy at +25°C and guaranteed ±2.5% accuracy over the full –40°C to +125°C automotive temperature range. Its 15ppm/°C thermal drift ensures predictable performance in thermally variable environments such as handheld medical devices or automotive cabin modules.

Can the MAX40001ANT12+T operate from a 1.8V supply?

Yes, the MAX40001ANT12+T operates from 1.7V to 5.5V, making it fully compatible with 1.8V systems. At 1.8V, it maintains full functionality including 1.252V reference output, rail-to-rail input operation (–0.2V to 2.0V), and open-drain output sinking capability - verified across –40°C to +125°C per datasheet specifications.

Does the MAX40001ANT12+T require external hysteresis for stable operation?

No, the MAX40001ANT12+T includes 2.5mV internal hysteresis, eliminating the need for external resistors in most applications. This built-in hysteresis prevents oscillation during slow-moving or noisy input transitions - confirmed in the device's Detailed Description and Applications Information sections.

What is the maximum capacitive load supported on the REF pin of the MAX40001ANT12+T?

The REF pin of the MAX40001ANT12+T is stable with capacitive loads up to 100pF, as explicitly specified in the Electrical Characteristics table. This allows placement of a small ceramic bypass capacitor directly at the REF pin to improve noise immunity without risking instability - a key advantage over references requiring external buffering.

Is the MAX40001ANT12+T pin-compatible with other MAX40001 variants?

Yes, all MAX40001 variants - including MAX40001ANT16+T (1.66V ref), MAX40001ANT19+T (1.94V ref), and MAX40001ANT22+T (2.22V ref) - share identical 6-bump WLP packaging and pinout. The only difference is the factory-trimmed reference voltage; no PCB layout change is required when selecting alternate reference options.