Analog Devices Inc./Maxim Integrated MAX9002EUA+T

Overview

MAX9002EUA+T from Maxim Integrated is a low-power, single-supply analog IC integrating a unity-gain stable operational amplifier (1.25MHz GBW), an 185ns comparator, and no internal voltage reference - enabling flexible external reference selection. It operates from +2.5V to +5.5V, draws only 340µA quiescent current, and delivers rail-to-rail outputs for both amplifier (+/−2.5mA) and comparator (+/−4.0mA), making it ideal for photodiode preamps and zero-crossing detection in portable instrumentation.

For engineers reviewing the MAX9002EUA+T datasheet, MAX9002EUA+T pinout, MAX9002EUA+T application, or MAX9002EUA+T equivalent, key selection criteria include its absence of internal reference (vs. MAX9000/MAX9001), externally accessible comparator inverting input (CIN−), µMAX-8 package footprint, and guaranteed rail-to-rail operation across −40°C to +85°C.

Technical Context

The MAX9002EUA+T implements a MOS-input op amp with unity-gain stability, 1.25MHz gain-bandwidth product, and 0.85V/µs slew rate, supporting precision amplification without phase reversal under overdriven inputs. Its comparator features bipolar inputs, ±2mV built-in hysteresis, and rail-to-rail CMOS output capable of 185ns propagation delay at 50mV overdrive.

Unlike MAX9000/MAX9001, the MAX9002EUA+T omits the internal 1.230V reference and exposes CIN− as a dedicated pin - allowing user-defined threshold referencing. Input common-mode range extends from VSS − 150mV to VDD − 1.2V (op amp) and VSS − 150mV to VDD − 1.1V (comparator), supporting ground-sensing operation.

Key Specifications

Pinout & Package

MAX9002EUA+T is housed in an 8-pin µMAX package (3mm × 3mm, 0.8mm height), pin-compatible with industry-standard SO-8 but with 50% smaller footprint and improved thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX9000EUA+, MAX9002EUA+ trades integrated reference convenience for design flexibility via CIN−; compared with MAX9005EUA+, it prioritizes unity-gain stability and lower power over bandwidth - making it optimal for general-purpose sensor interfacing where precision and efficiency coexist.

Availability

MAX9002EUA+T is available at Aetrix Electronics and suitable for photodiode preamplifiers, zero-crossing detectors, and smart card readers requiring stable component supply across industrial temperature ranges (−40°C to +85°C) and long-lifecycle production programs.

Supply support for MAX9002EUA+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, mixed-signal, and power management ICs for demanding industrial, medical, and communications applications.

The MAX9000–MAX9005 family was engineered to integrate op amp, comparator, and reference functions into minimal PCB area while maintaining rail-to-rail performance and ultra-low quiescent current - targeting portable and battery-critical systems.

FAQ

What is the function of Pin 5 (CIN−) on the MAX9002EUA+T?

Pin 5 is the inverting input of the comparator and is externally accessible - unlike MAX9000/MAX9003 where it connects internally to the reference. This allows users to apply custom thresholds using external resistors or references. The MAX9002EUA+T does not include an internal voltage reference, so CIN− must be driven by an external source for comparator operation.

Does the MAX9002EUA+T have an internal voltage reference?

No, the MAX9002EUA+T does not include an internal voltage reference. This distinguishes it from MAX9000EUA+, MAX9001EUA+, MAX9003EUA+, and MAX9004EUA+. Its lack of internal reference reduces quiescent current and increases design flexibility, requiring external reference or resistor-divider networks for comparator threshold setting.

What is the maximum capacitive load the op amp output of MAX9002EUA+T can drive stably?

The op amp output of MAX9002EUA+T is stable with capacitive loads up to 250pF, as confirmed in the datasheet's Electrical Characteristics table. Driving larger loads (e.g., ADC input capacitors >250pF) requires isolation via a series resistor or buffer stage to prevent peaking or oscillation.

Can the MAX9002EUA+T operate from a 2.5V supply?

Yes, the MAX9002EUA+T is fully specified for operation from +2.5V to +5.5V single supply. At 2.5V, it maintains rail-to-rail output swing (within ~5mV of rails), 185ns comparator propagation delay, and 340µA typical supply current - enabling compatibility with modern low-voltage microcontrollers and energy-harvesting systems.

How does the MAX9002EUA+T handle input overvoltage beyond its common-mode range?

The MAX9002EUA+T op amp and comparator both avoid phase reversal when inputs exceed the common-mode range - a key reliability feature. Inputs may safely extend to VSS − 0.15V and VDD − 1.2V (op amp) or VDD − 1.1V (comparator) without causing output inversion or latch-up, simplifying protection design in noisy or transient-prone environments.