Analog Devices Inc./Maxim Integrated MAX9031AXK-T

Overview

MAX9031AXK-T from Maxim Integrated is a single, rail-to-rail output comparator optimized for low-power, single-supply operation from +2.5V to +5.5V, featuring 188ns propagation delay, 35μA supply current per comparator, 4mV internal hysteresis, and operation across -40°C to +125°C - deployed in battery-powered portable systems and sensor signal detection circuits.

For engineers reviewing the MAX9031AXK-T datasheet, MAX9031AXK-T pinout, MAX9031AXK-T application, or MAX9031AXK-T equivalent, this page delivers verified electrical parameters, SC70-5 package mapping, functional role in threshold detection, and validated alternative comparators for portable and automotive-grade designs.

Technical Context

The MAX9031AXK-T implements a precision comparator core with input common-mode range extending from VSS to VDD − 1.1V, enabling direct interfacing with sensors operating near ground or rail. Its output stage minimizes switching current transients to suppress power-supply glitches during transitions.

Internal 4mV hysteresis eliminates oscillation on slow-moving inputs without external components, while rail-to-rail output swing ensures full logic-level compatibility with 1.8V–5V digital interfaces. No phase reversal occurs under overdriven input conditions, preserving signal integrity in noisy environments.

Key Specifications

Pinout & Package

The MAX9031AXK-T is housed in a 5-pin SC70 package (package code X5+1), footprint-compatible with industry-standard 5-pin SOT23 layouts but with 30% smaller area (1.6mm × 1.6mm).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV3701IDBVR and LMV7215M5X, the MAX9031AXK-T uniquely balances low power (35μA), fast response (188ns), and built-in 4mV hysteresis - eliminating external components while maintaining automotive-grade temperature performance and rail-to-rail output drive.

Availability

MAX9031AXK-T is available at Aetrix Electronics and suitable for battery-powered portable systems, sensor signal discrimination, and digital line receivers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX9031AXK-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 industrial, automotive, and communications markets.

The MAX9030/MAX9031/MAX9032/MAX9034 family targets cost-sensitive, space-constrained applications demanding low power, wide supply range, and robust noise immunity - especially in portable and automotive sensor interfaces.

FAQ

What is the maximum capacitive load the MAX9031AXK-T can drive without oscillation?

The MAX9031AXK-T is specified to drive up to 150pF without sustained oscillations, as confirmed in the Electrical Characteristics table. This value reflects stability under worst-case conditions including temperature extremes and supply variation. For loads exceeding 150pF, external series resistance or buffer stages are recommended. The MAX9031AXK-T's output stage is optimized for low-glitch operation, not high-current drive, so layout parasitics must remain minimal to preserve the 188ns propagation delay.

Does the MAX9031AXK-T have shutdown capability like the MAX9030?

No, the MAX9031AXK-T does not include a shutdown pin or function. Shutdown is exclusive to the MAX9030 variant (e.g., MAX9030AXT-T), which features a dedicated SHDN terminal. The MAX9031AXK-T is a single comparator without shutdown - its 35μA supply current is the minimum operational state. If power gating is required, external MOSFET control of VDD or use of the MAX9030 is necessary. This distinction is clearly documented in the General Description and Ordering Information sections of the datasheet.

What is the input offset voltage specification for the MAX9031AXK-T over temperature?

The MAX9031AXK-T has a guaranteed input offset voltage of ±5mV over the full -40°C to +125°C range, with a typical value of ±1mV at +25°C. Its offset voltage temperature coefficient is ±1µV/°C, meaning drift contributes less than ±0.1mV over a 100°C span. This performance is validated across production lots and supports precision threshold detection in automotive and industrial environments where thermal gradients are significant. The MAX9031AXK-T's offset spec is identical to other members of the MAX903x family.

Can the MAX9031AXK-T operate from dual supplies?

Yes, the MAX9031AXK-T supports dual-supply operation from ±1.25V to ±2.75V, as stated in the Detailed Description section. This mode maintains all key specifications including 188ns propagation delay, 35μA supply current, and 4mV hysteresis. However, the device is optimized for single-supply use - its input common-mode range extends to VSS (not mid-rail), and rail-to-rail output behavior assumes VSS = 0V reference. Dual-supply use requires careful grounding and bypassing to avoid violating absolute maximum ratings on input pins.

Is the MAX9031AXK-T RoHS-compliant and lead-free?

Yes, the MAX9031AXK-T is RoHS-compliant and lead-free, indicated by the "+" suffix in its full ordering code (MAX9031AXK+T). The "+" denotes lead(Pb)-free/RoHS-compliant packaging per Maxim Integrated's Package Information table. It uses matte tin plating on SC70 terminals and meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) requirements. This compliance applies to both wafer fabrication and assembly processes, and the device is rated for reflow soldering up to +260°C.