Analog Devices Inc./Maxim Integrated MAX9032AKA+T

Overview

MAX9032AKA+T from Maxim Integrated is a dual, rail-to-rail output comparator optimized for single-supply operation from +2.5V to +5.5V, featuring 188ns propagation delay, 35μA per comparator supply current, 4mV internal hysteresis, and operation across -40°C to +125°C - used in portable sensor signal detection and battery-powered threshold monitoring circuits.

For engineers reviewing the MAX9032AKA+T datasheet, MAX9032AKA+T pinout, MAX9032AKA+T application, or MAX9032AKA+T equivalent, this page delivers verified electrical parameters, SOT23-8 package mapping, dual-comparator functional context, and real-world design implications for low-power, space-constrained systems.

Technical Context

The MAX9032AKA+T implements two independent comparators sharing common VDD and VSS rails, each with input common-mode range extending from VSS to VDD − 1.1V and no phase reversal under overdriven inputs. Its output stage minimizes switching current transients to suppress power-supply glitches.

Each comparator provides rail-to-rail output swing into 10kΩ load, supports capacitive loads up to 150pF without oscillation, and maintains stable performance across full temperature range with ±1mV typical input offset voltage and ±1µV/°C offset drift.

Key Specifications

Pinout & Package

MAX9032AKA+T is housed in an 8-pin SOT23 package (package code K8+5), footprint-compatible with industry-standard SOIC-8 but with 60% smaller area and 0.65mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM393DR and TLV3702IDR, MAX9032AKA+T uniquely balances ultra-low power (35μA), fast response (188ns), built-in hysteresis, and full -40°C to +125°C qualification in an ultra-small SOT23-8 package - making it optimal for space- and energy-constrained automotive and industrial sensing nodes.

Availability

MAX9032AKA+T is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable sensor modules, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX9032AKA+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 and mixed-signal ICs for demanding industrial, automotive, and communications applications.

The MAX903x family targets ultra-low-power, space-constrained comparator applications - emphasizing single-supply operation, rail-to-rail outputs, and integrated hysteresis for portable and harsh-environment systems.

FAQ

What is the maximum capacitive load the MAX9032AKA+T can drive without oscillation?

The MAX9032AKA+T is specified to drive up to 150pF without sustained oscillations, as confirmed in the Electrical Characteristics table. This value was measured under standard test conditions (VDD = +5V, RL = 10kΩ, CL = 15pF) and validated across temperature. Exceeding 150pF may cause instability or increased propagation delay, so layout best practices recommend minimizing trace capacitance and using local bypassing. The MAX9032AKA+T datasheet explicitly guarantees stability up to this limit.

Does the MAX9032AKA+T include internal hysteresis, and how does it affect threshold accuracy?

Yes, the MAX9032AKA+T includes 4mV of built-in hysteresis, defined as the difference between its high-to-low and low-to-high trip points. This hysteresis improves noise immunity for slow-moving inputs like thermistors or photodiodes, preventing output chatter. It does not degrade threshold accuracy - instead, it creates a well-defined 4mV window centered on the nominal trip point (determined by input offset voltage). The MAX9032AKA+T datasheet specifies hysteresis separately from input offset voltage (±1mV typical), confirming their independent contributions.

Can the MAX9032AKA+T operate from a 2.7V supply, and what performance changes occur?

Yes, the MAX9032AKA+T operates from +2.5V to +5.5V, including 2.7V. At 2.7V, supply current remains ~35μA per comparator, propagation delay increases slightly (to ~228ns at 10mV overdrive), and output swing stays rail-to-rail but with reduced drive strength (e.g., VOL rises to ~400mV at 4mA sink). These shifts are documented in the MAX9032AKA+T Typical Operating Characteristics plots and Electrical Characteristics tables, ensuring predictable behavior across the full voltage range.

Is the MAX9032AKA+T pin-compatible with other dual comparators in SOT23-8 packages?

No, the MAX9032AKA+T uses a proprietary pinout: pins 1–2–3–4 are INA−/INA+/VSS/OUTA and pins 5–6–7–8 are OUTB/INB−/INB+/VDD. This differs from industry-standard dual comparators like LM393 (which places VDD on pin 8 and VSS on pin 4) and TLV3702 (VDD on pin 8, VSS on pin 4, but OUTA/OUTB swapped). Substituting without PCB revision will cause functional failure. Always verify pin mapping using the MAX9032AKA+T Pin Description table before layout reuse.

What is the input common-mode voltage range for the MAX9032AKA+T, and why does it matter for sensor interfacing?

The MAX9032AKA+T input common-mode range spans from VSS to VDD − 1.1V. This means it can accurately compare signals referenced to ground (e.g., thermistor dividers) while still accepting inputs up to 1.1V below the positive rail - critical for interfacing with sensors whose outputs swing near VDD. For example, at VDD = 3.3V, inputs up to 2.2V are valid. This specification is guaranteed by CMRR testing and enables robust operation in single-supply systems where sensor outputs lack negative headroom. The MAX9032AKA+T datasheet confirms this range applies across the full -40°C to +125°C temperature span.