Analog Devices Inc./Maxim Integrated MAX40002ANS02+T

Overview

The MAX40002ANS02+T from Analog Devices is a nanoPower, noninverting-input comparator with integrated 0.2V factory-trimmed reference voltage, open-drain output, and ultra-low 500nA supply current. It operates from 1.7V to 5.5V, supports input voltages from 0.1V to 5.5V (independent of supply), and is specified over –40°C to +125°C for automotive-grade reliability. It is used in battery-critical signal monitoring circuits such as low-voltage threshold detection in portable medical sensors.

For engineers reviewing the MAX40002ANS02+T datasheet, MAX40002ANS02+T pinout, MAX40002ANS02+T application, or MAX40002ANS02+T equivalent, key selection criteria include its 0.2V internal reference accuracy (±12mV at +25°C), 9µs propagation delay at 100mV overdrive, open-drain output compatibility with mixed-voltage logic, and 0.73mm × 0.73mm WLP package footprint - critical for space-constrained wearable and IoT edge nodes.

Technical Context

This device implements a BiCMOS-based comparator core with temperature-compensated internal reference and high-impedance inputs that remain functional even when VCC/REF = 0V. Its architecture enables input voltages exceeding VCC by up to 0.3V beyond absolute maximum ratings, eliminating external clamping diodes in overvoltage-tolerant sensing paths.

The open-drain output stage requires an external pullup but allows level-shifting across logic domains (e.g., 1.8V comparator driving 3.3V microcontroller I/O). Internal 8mV hysteresis ensures noise immunity without external feedback components, and RF filtering suppresses EMI-induced false triggering in noisy portable environments.

Key Specifications

Pinout & Package

MAX40002ANS02+T uses a 4-bump wafer-level package (WLP) with 0.35mm pitch and 0.73mm × 0.73mm footprint. Bumps are arranged in a 2×2 grid; no NC bump is present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV3691IDCKR, MAX40002ANS02+T delivers tighter low-threshold accuracy and smaller footprint; compared with MAX40012ANS09+T, it enables detection at one-fifth the voltage level - essential for sub-1V sensor interfaces and deep-discharge protection.

Availability

MAX40002ANS02+T is available at Aetrix Electronics and suitable for portable medical devices, battery-powered instrumentation, and automotive cabin electronics requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX40002ANS02+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.

MAX40002–MAX40005 is part of Analog Devices' nanoPower comparator family, designed specifically for ultra-low-power, space-constrained sensing and monitoring in battery-operated edge devices.

FAQ

What is the internal reference voltage tolerance of MAX40002ANS02+T over temperature?

The MAX40002ANS02+T features a factory-trimmed 0.2V internal reference with ±12mV tolerance at +25°C, widening to ±26mV over the full –40°C to +125°C range. This corresponds to ±6% to ±13% accuracy, sufficient for non-critical threshold detection where absolute precision is secondary to ultra-low power and small size. The MAX40002ANS02+T datasheet specifies these limits in the Electrical Characteristics table under "Switching Threshold Voltage".

Can MAX40002ANS02+T operate with input voltages higher than its supply voltage?

Yes, the MAX40002ANS02+T supports input voltages from 0.1V to 5.5V independent of VCC/REF, and its inputs tolerate up to 6V per Absolute Maximum Ratings - meaning VIN can exceed VCC by several volts. This eliminates input clamping diodes in applications like monitoring 5V bus voltage with a 1.8V-powered MAX40002ANS02+T. The MAX40002ANS02+T achieves this via innovative input-stage architecture without ESD diode clamps to VCC.

Does MAX40002ANS02+T require an external pullup resistor on its output?

Yes, the MAX40002ANS02+T has an open-drain output and requires an external pullup resistor to a valid logic-high voltage (≤5.5V) for proper operation. Typical values range from 10kΩ to 100kΩ depending on speed and drive strength needs. Unlike push-pull comparators, this configuration enables level translation - for example, a 1.8V-powered MAX40002ANS02+T can drive a 3.3V microcontroller input using a 3.3V pullup.

What is the propagation delay of MAX40002ANS02+T at low overdrive conditions?

At 20mV input overdrive, the MAX40002ANS02+T exhibits 45µs propagation delay for high-to-low transitions and 55µs for low-to-high (with 100kΩ pullup). This reflects real-world performance near the switching threshold, where noise margin and hysteresis dominate timing. For faster response, ensure ≥100mV overdrive, which reduces delay to 9µs (high-to-low) and 25µs (low-to-high). These values are measured per the MAX40002ANS02+T datasheet conditions.

Is MAX40002ANS02+T pin-compatible with other members of the MAX40002–MAX40005 family?

Yes, all MAX40002–MAX40005 variants in the same package type (e.g., WLP "ANS" or SOT23 "AUK") share identical pinouts and footprints. The MAX40002ANS02+T (0.2V, noninverting, open-drain, WLP) is pin-compatible with MAX40002ANS05+T (0.5V), MAX40003ANS02+T (0.2V, inverting), and MAX40004ANS02+T (0.2V, noninverting, push-pull) - enabling reference voltage, polarity, or output topology changes without PCB redesign.