Analog Devices Inc./Maxim Integrated MAX40004ANS05+T

Overview

MAX40004ANS05+T from Analog Devices is a nanoPower, noninverting-input, push-pull-output comparator with factory-trimmed 0.5V internal reference voltage, 500nA supply current, and operation from 1.7V to 5.5V supply - designed for ultra-low-power threshold detection in space-constrained portable electronics such as medical wearables and battery-powered instrumentation.

For engineers reviewing the MAX40004ANS05+T datasheet, MAX40004ANS05+T pinout, MAX40004ANS05+T application, or MAX40004ANS05+T equivalent, key selection criteria include its 0.5V precision internal reference, push-pull output eliminating external pullup, 9µs propagation delay at 100mV overdrive, -40°C to +125°C automotive temperature range, and 0.73mm × 0.73mm 4-bump WLP package.

Technical Context

The MAX40004ANS05+T implements a BiCMOS input stage enabling rail-to-rail input voltage range (0.1V to 5.5V) independent of supply, with high-impedance inputs even at VCC = 0V. Its internal 0.5V reference is temperature-compensated and factory-trimmed to ±15mV over -40°C to +125°C.

This device uses a push-pull output stage capable of sourcing 1mA (VOH ≥ VCC – 0.4V) and sinking 2mA (VOL ≤ 0.4V), delivering fast 9µs propagation delay and 800ns rise/200ns fall times. It features 8mV typical internal hysteresis and >45dB PSRR for robust noise immunity in noisy environments.

Key Specifications

Pinout & Package

MAX40004ANS05+T is packaged in a 0.73mm × 0.73mm, 4-bump wafer-level package (WLP) with 0.35mm pitch, optimized for minimal PCB footprint - equivalent to two 0402 passives.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX40004AUK05+T, the MAX40004ANS05+T offers 75% smaller footprint and superior thermal resistance (θJA = 104.4°C/W), while TLV3691IDCKR requires layout changes due to open-drain output and different reference voltage - making MAX40004ANS05+T optimal for space- and power-critical designs.

Availability

MAX40004ANS05+T is available at Aetrix Electronics and suitable for medical wearables, industrial sensor nodes, and USB-C accessory designs requiring stable component supply across automotive-grade temperature ranges and long-life battery operation.

Supply support for MAX40004ANS05+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 healthcare markets since 1965.

The MAX4000x family was engineered specifically for ultra-low-power, space-constrained threshold detection - targeting battery-operated portable electronics where every nanoamp and square micron matters.

FAQ

What is the internal reference voltage tolerance of the MAX40004ANS05+T over temperature?

The MAX40004ANS05+T features a factory-trimmed 0.5V internal reference with ±15mV (±3%) tolerance over the full –40°C to +125°C operating range, as specified in the Electrical Characteristics table on page 3 of the datasheet. This accuracy is maintained without external calibration or trimming components, enabling reliable low-voltage threshold detection in harsh thermal environments.

Does the MAX40004ANS05+T require an external pullup resistor on its output?

No, the MAX40004ANS05+T does not require an external pullup resistor because it features a push-pull output stage. Unlike open-drain comparators, this device actively drives both high and low states - sourcing up to 1mA and sinking up to 2mA - allowing direct interface with standard CMOS/TTL inputs without additional components.

Can the MAX40004ANS05+T operate with input voltages exceeding its supply rail?

Yes, the MAX40004ANS05+T supports input voltages from 0.1V to 5.5V independent of supply voltage, and its innovative input-stage architecture allows VIN to exceed VCC by several volts (within Absolute Maximum Ratings of –0.3V to +6V). This eliminates clamping diodes found in conventional comparators and enables direct sensing of signals above the supply rail.

What is the propagation delay of the MAX40004ANS05+T at 20mV overdrive?

At 20mV input overdrive, the MAX40004ANS05+T exhibits a propagation delay of 50µs for low-to-high transitions and 45µs for high-to-low transitions, as measured under standard conditions (VCC = 3.3V, CL = 20pF, TA = –40°C to +125°C). These values reflect worst-case timing for marginal signal detection scenarios.

Is the MAX40004ANS05+T pin-compatible with other devices in the MAX4000x family?

The MAX40004ANS05+T shares identical 4-bump WLP pinout (A1=OUT, A2=IN, B1=VCC/REF, B2=GND) with all MAX40002–MAX40005 and MAX40012–MAX40015 WLP variants. However, functional compatibility depends on reference voltage, input polarity, and output type - e.g., MAX40005ANS05+T has inverting input and same 0.5V reference, but inverted logic behavior.