Analog Devices Inc./Maxim Integrated MAX40000AUT12+T

Overview

The MAX40000AUT12+T from Maxim Integrated is a nanoPower single comparator with integrated 1.252V precision voltage reference, push-pull output, and operation from 1.7V to 5.5V supply. It consumes only 0.9μA typical supply current, features 2.5mV internal hysteresis, and is fully specified over –40°C to +125°C for automotive and portable battery monitoring applications.

For engineers reviewing the MAX40000AUT12+T datasheet, MAX40000AUT12+T pinout, MAX40000AUT12+T application, or MAX40000AUT12+T equivalent, key selection criteria include its ultra-low quiescent current, factory-trimmed 1% initial reference accuracy, rail-to-rail input range (–0.2V to VDD + 0.2V), <10μs propagation delay, and SOT23-6 package compatibility with space-constrained PCB layouts.

Technical Context

The MAX40000AUT12+T integrates a bandgap-based voltage reference trimmed to ±1% at +25°C and <2.5% over –40°C to +125°C, with 15ppm/°C thermal drift and stability up to 100pF capacitive load. Its input stage supports common-mode voltages beyond rails (–0.2V to VDD + 0.2V) and exhibits 1nA typical input bias current.

The push-pull output delivers rail-to-rail swing with ±2mA drive capability, achieves 3.2μs (H→L) and 9.6μs (L→H) propagation delay under 100mV overdrive, and eliminates supply glitches via break-before-make switching architecture-critical for stable operation in low-noise, battery-powered systems.

Key Specifications

Pinout & Package

MAX40000AUT12+T is housed in a 6-pin SOT23 package (package code U6+1), footprint compatible with standard SOT23 land pattern 90-0175, with 0.95mm pitch and 2.9mm × 1.6mm body size.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV4041DBVR and MAX9060AXK+T, the MAX40000AUT12+T uniquely provides both a user-accessible 1.252V reference output and push-pull drive in SOT23-6, enabling simpler, lower-component-count designs for battery monitoring and precision threshold detection where reference reuse or direct logic interfacing is required.

Availability

MAX40000AUT12+T is available at Aetrix Electronics and suitable for battery management systems, portable medical instruments, automotive body electronics, and industrial sensor nodes requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX40000AUT12+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 automotive, industrial, and consumer markets.

The MAX40000 family targets ultra-low-power, space-constrained portable and automotive systems requiring integrated reference comparators with guaranteed performance across –40°C to +125°C.

FAQ

What is the reference voltage accuracy of the MAX40000AUT12+T over temperature?

The MAX40000AUT12+T features a factory-trimmed 1.252V internal reference with ±1% initial accuracy at +25°C and better than ±2.5% accuracy over the full –40°C to +125°C operating range. Its typical temperature coefficient is 15ppm/°C, ensuring stable threshold detection in automotive and industrial environments where ambient temperature varies widely. The MAX40000AUT12+T reference remains stable for capacitive loads up to 100pF without external buffering.

Can the MAX40000AUT12+T operate from a 1.8V supply?

Yes, the MAX40000AUT12+T supports supply voltages from 1.7V to 5.5V, making it fully operational at 1.8V. At this voltage, it maintains 0.9μA typical supply current, 2.5mV internal hysteresis, and rail-to-rail input range (–0.2V to 2.0V). Its push-pull output delivers valid logic levels compatible with 1.8V CMOS inputs, enabling direct integration into low-voltage microcontroller systems without level translation. The MAX40000AUT12+T reference remains accurate and stable at 1.8V supply.

Does the MAX40000AUT12+T require external hysteresis for reliable switching?

No, the MAX40000AUT12+T includes 2.5mV of internal hysteresis, which prevents oscillation and chatter when input signals are near the threshold-especially beneficial for slow-moving or noisy inputs like thermistor outputs or battery voltage ramps. External hysteresis is only needed if greater hysteresis bandwidth is required; adding it introduces VDD dependency and increases power consumption. The MAX40000AUT12+T's internal hysteresis eliminates the need for external resistors in most portable and automotive threshold-detection applications.

What is the maximum capacitive load the REF pin can drive?

The REF pin of the MAX40000AUT12+T is stable with capacitive loads up to 100pF, as confirmed in the Electrical Characteristics table. For most applications-including driving ADC reference inputs or comparator thresholds-a 0.1μF ceramic bypass capacitor placed close to the REF pin is recommended to suppress high-frequency noise. Loads exceeding 100pF may cause instability or increased settling time; in such cases, buffer the REF output with a low-input-bias-current op amp like the MAX44265. The MAX40000AUT12+T REF pin can source/sink up to ±100nA.

How does the push-pull output of the MAX40000AUT12+T differ from open-drain alternatives?

The MAX40000AUT12+T's push-pull output actively drives both high and low states, delivering rail-to-rail voltage swing (0V to VDD) without requiring external pull-up resistors. This reduces component count, eliminates pull-up power loss, and ensures fast, deterministic rise/fall times (300ns rise, 52ns fall). In contrast, open-drain comparators like the MAX40001 require external pull-ups and exhibit slower rise times dependent on RC time constants. The MAX40000AUT12+T push-pull architecture is ideal for driving MCU interrupt pins or logic inputs directly in battery-sensitive designs.