Analog Devices Inc./Maxim Integrated MAX9005ESA-T

Overview

MAX9005ESA-T from Maxim Integrated is a low-power, high-speed, single-supply analog IC integrating a decompensated operational amplifier (AV ≥10V/V, 8MHz GBW), a 185ns comparator, and no internal voltage reference. It operates from +2.5V to +5.5V, draws 340µA quiescent current at 5V, supports rail-to-rail output swing (±4mA comparator drive), and features ground-sensing inputs (–0.15V to VDD–1.1V for comparator). It is used in photodiode preamps, zero-crossing detectors, and sensor signal conditioning where compact integration and fast response are critical.

For engineers reviewing the MAX9005ESA-T datasheet, MAX9005ESA-T pinout, MAX9005ESA-T application, or MAX9005ESA-T equivalent, this page delivers verified electrical parameters, package mapping to 8-pin SO, functional role clarification (op amp + comparator only), real-world use scenarios, and two validated alternative parts with documented technical and application differences.

Technical Context

The MAX9005ESA-T implements a decompensated op amp optimized for closed-loop gains ≥10V/V, delivering 8MHz gain-bandwidth and 6.0V/µs slew rate - enabling higher-speed signal conditioning than unity-gain-stable variants. Its comparator features ±2mV built-in hysteresis, bipolar input stage with 8nA bias current, and rail-to-rail CMOS output capable of 55mA short-circuit current.

Unlike MAX9000/MAX9001/MAX9003/MAX9004, the MAX9005ESA-T omits the internal 1.230V reference and exposes both comparator inputs (CIN+, CIN–) externally - allowing flexible threshold configuration using external references or resistive dividers. Input common-mode range extends to –0.15V (below VSS) and up to VDD–1.1V for the comparator, supporting ground-referenced sensing.

Key Specifications

Pinout & Package

MAX9005ESA-T is housed in an 8-pin SO (Small Outline) package, surface-mount, with standard JEDEC MS-012AC footprint (5.0mm × 6.2mm, 1.75mm height, 1.27mm pitch). Pin 1 marked by notch or dot.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX9002ESA-T, the MAX9005ESA-T offers identical analog performance but is distinguished by its explicit part-numbering convention indicating no internal reference - aiding design traceability. Against TLV3701CDR, MAX9005ESA-T trades lower power for functional integration, reducing system-level complexity in sensor front-ends requiring both amplification and decision-making.

Availability

MAX9005ESA-T is available at Aetrix Electronics and suitable for photodiode preamplification, zero-crossing detection, and sensor signal digitization requiring stable component supply across industrial, medical, and consumer electronics production cycles.

Supply support for MAX9005ESA-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, automotive, and communications applications.

The MAX9000–MAX9005 family was engineered to integrate op amp, comparator, and reference functions into minimal PCB area while maintaining low power and high speed - targeting portable instrumentation and sensor interface modules.

FAQ

What is the key functional distinction between MAX9005ESA-T and MAX9000ESA-T?

The MAX9005ESA-T integrates a decompensated op amp (stable at ≥10V/V gain, 8MHz GBW) and a comparator with exposed CIN+ and CIN− pins, but no internal voltage reference. In contrast, the MAX9000ESA-T includes a 1.230V ±1% reference and internally connects CIN− to that reference - making MAX9005ESA-T ideal for applications requiring custom thresholding, while MAX9000ESA-T suits fixed-reference comparisons.

Does MAX9005ESA-T support rail-to-rail input common-mode voltage?

No. The op amp input common-mode range is specified as –0.15V to VDD–1.2V, and the comparator's is –0.15V to VDD–1.1V. Neither achieves true rail-to-rail input (i.e., down to VSS or up to VDD), but both support ground-sensing - a critical capability for interfacing with 0V-referenced sensors without external level-shifting circuitry.

Can MAX9005ESA-T drive a 10kΩ load while maintaining rail-to-rail output swing?

Yes. The op amp output maintains rail-to-rail swing (VOL ≤400mV, VOH ≥VDD–400mV) driving loads ≥10kΩ at room temperature. At 1kΩ, VOL rises to ~200mV and VOH drops to ~VDD–200mV - verified per Typical Operating Characteristics Figure TOC08/TOC09. For 10kΩ loads, full swing is preserved with <0.5% gain error.

What is the maximum capacitive load the op amp output can drive without instability?

The MAX9005ESA-T op amp is stable driving capacitive loads up to 250pF, as confirmed in the Electrical Characteristics table (CLOAD parameter). Driving >250pF requires external isolation resistor (e.g., 10–50Ω in series) to maintain phase margin >40°, especially at gains ≥10V/V where bandwidth and slew rate interact with load capacitance.

Is there a shutdown mode available on MAX9005ESA-T?

No. MAX9005ESA-T does not include a shutdown (SHDN) pin or function. That feature is present only in MAX9001 and MAX9004 variants. MAX9005ESA-T draws 340µA continuously across its full supply range (+2.5V to +5.5V) and cannot be placed into a 2µA standby state - a key differentiator when designing for ultra-low-power intermittent operation.