Analog Devices Inc./Maxim Integrated MAX9002ESA

Overview

MAX9002ESA from Maxim Integrated is a low-power, single-supply analog IC integrating a unity-gain stable operational amplifier (1.25MHz GBW), a 185ns comparator, and no internal voltage reference - enabling external reference flexibility. It operates from +2.5V to +5.5V, draws 340µA quiescent current, supports rail-to-rail output swing (±2.5mA op-amp / ±4.0mA comparator), and features ground-sensing inputs for both functional blocks. It is used in photodiode preamps, zero-crossing detectors, and smart card readers where compact integration and low supply current are critical.

For engineers reviewing the MAX9002ESA datasheet, MAX9002ESA pinout, MAX9002ESA application, or MAX9002ESA equivalent, key selection criteria include its absence of internal reference (vs. MAX9000/MAX9001), 8-pin SO package, unity-gain stability, 185ns comparator propagation delay, and rail-to-rail I/O capability under single-supply operation.

Technical Context

The MAX9002ESA integrates three independent analog functions on one die: an op amp with 1.25MHz gain-bandwidth product and 0.85V/µs slew rate; a comparator with ±2mV built-in hysteresis, 185ns propagation delay, and rail-to-rail CMOS output; and no internal reference - freeing design flexibility for external precision references. Its input common-mode range extends from 150mV below VSS to within 1.2V of VDD (op amp) and within 1.1V of VDD (comparator).

All functional blocks share a single +2.5V to +5.5V supply, draw only 340µA total quiescent current, and maintain rail-to-rail output swing into loads up to ±2.5mA (op amp) and ±4.0mA (comparator). The device exhibits no phase reversal under overdriven inputs and remains stable driving capacitive loads up to 250pF (op amp) and 15pF (comparator).

Key Specifications

Pinout & Package

MAX9002ESA is housed in an 8-pin SO (Small Outline) package, 150mil width, with standard JEDEC MS-012AC footprint and 1.27mm pitch. Pin 1 is marked by a beveled corner or dot.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX9000ESA, MAX9002ESA trades internal reference for greater reference flexibility and lower quiescent current; compared with TLV2302IDR, it delivers full analog signal chain integration in one package but consumes more current than standalone op amps.

Availability

MAX9002ESA is available at Aetrix Electronics and suitable for photodiode preamplification, zero-crossing detection, and smart card reader signal conditioning requiring stable component supply across industrial temperature ranges (−40°C to +85°C).

Supply support for MAX9002ESA 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 footprints for space-constrained, low-power sensor and interface systems - prioritizing rail-to-rail performance and single-supply operation.

FAQ

What is the function of Pin 5 (CIN−) on the MAX9002ESA?

Pin 5 (CIN−) is the externally accessible inverting input of the comparator. Unlike MAX9000/MAX9003, the MAX9002ESA does not internally connect this pin to a reference - allowing designers to apply custom thresholds using external resistive dividers or precision references. This provides full flexibility for adjustable or multi-level detection schemes in the MAX9002ESA.

Does the MAX9002ESA include an internal voltage reference?

No, the MAX9002ESA does not include an internal voltage reference. Per the selector guide and detailed description, MAX9002 and MAX9005 variants omit the internal 1.230V reference found in MAX9000/MAX9001/MAX9003/MAX9004. This design choice allows system designers to use higher-accuracy, lower-drift, or application-specific external references while retaining the integrated op amp and comparator functionality of the MAX9002ESA.

What is the maximum capacitive load the op-amp output of the MAX9002ESA can drive stably?

The op-amp output of the MAX9002ESA is stable driving capacitive loads up to 250pF, as confirmed in the Electrical Characteristics table and Typical Operating Characteristics (TOC25). This specification applies under unity-gain configuration with RL ≥ 1kΩ. Exceeding 250pF may cause peaking or oscillation; for larger loads, a series resistor (e.g., 10–50Ω) should be added close to the output pin to isolate capacitance in the MAX9002ESA.

How does the comparator hysteresis work in the MAX9002ESA?

The MAX9002ESA comparator includes ±2mV of built-in input-referred hysteresis, meaning the trip point shifts by 2mV depending on output state - preventing oscillation during slow or noisy transitions. This hysteresis is fixed and internal; no external components are needed. It is effective across the full temperature range (−40°C to +85°C) and supply voltage (2.5V to 5.5V), ensuring robust noise immunity in real-world applications of the MAX9002ESA.

Can the MAX9002ESA operate from a dual supply?

Yes, the MAX9002ESA can operate from dual supplies ranging from ±1.25V to ±2.75V, as stated in the Applications Information section. In dual-supply mode, VSS becomes the negative rail (e.g., −1.25V) and VDD the positive rail (e.g., +1.25V). All specifications - including input common-mode range, output swing, and quiescent current - remain valid. However, the device is optimized for single-supply use, and the MAX9002ESA datasheet characterizations assume VSS = 0V unless otherwise noted.