Analog Devices Inc./Maxim Integrated MAX9140AAXK/V+

Overview

MAX9140AAXK/V+ from Analog Devices is a single high-speed rail-to-rail input comparator optimized for 3V/5V single-supply systems, featuring 40ns propagation delay, 150μA supply current per comparator, and 500μV typical offset voltage. It operates across –40°C to +85°C (E grade), supports rail-to-rail inputs beyond supply rails, and delivers CMOS/TTL-compatible outputs swinging within 300mV of VCC or GND - ideal for battery-powered threshold detection in portable instrumentation.

For engineers reviewing the MAX9140AAXK/V+ datasheet, MAX9140AAXK/V+ pinout, MAX9140AAXK/V+ application, or MAX9140AAXK/V+ equivalent, key selection criteria include propagation delay vs. overdrive, input common-mode range extension beyond rails, output drive capability into 4mA loads, AEC-Q100 qualification status (T-only variant), and SC70-5 package thermal performance at elevated ambient temperatures.

Technical Context

The MAX9140AAXK/V+ implements a bipolar process comparator core with internal 1.5mV hysteresis to suppress oscillation during slow-moving or noise-prone input transitions. Its input stage includes back-to-back diodes and 4.1kΩ series resistors for ±20mA differential input fault tolerance without damage.

The output stage uses a current-driven architecture delivering fast slew rates during transitions and reduced quiescent current in steady-state VOH/VOL conditions. Output logic states remain valid when either input is within the –0.2V to VCC+0.2V common-mode range, enabling robust interfacing with mixed-voltage digital systems.

Key Specifications

Pinout & Package

MAX9140AAXK/V+ is housed in a RoHS-compliant 5-pin SC70 package (package code X5+1), measuring 2.0mm × 1.25mm × 0.95mm, with 0.65mm pitch and exposed pad not connected internally. Thermal resistance θ_JA is 220°C/W, supporting operation up to +85°C ambient with minimal derating.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed, low-power comparator applications.

Compared with TLV3501DBVR and LMV7215M5X, MAX9140AAXK/V+ uniquely balances 40ns speed, 150μA power, integrated hysteresis, and ±20mA input fault tolerance - making it the preferred choice for cost-sensitive, noise-immune threshold detection in automotive-adjacent and industrial edge nodes.

Availability

MAX9140AAXK/V+ is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial line receivers, zero-crossing detection circuits, and 3V/5V mixed-signal interface designs requiring stable component supply and long-term manufacturing continuity.

Supply support for MAX9140AAXK/V+ 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

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets with precision signal chain solutions.

The MAX9140 family belongs to Analog Devices' high-speed comparator product line, designed specifically for low-power, rail-to-rail single-supply operation in portable and space-constrained systems where timing accuracy and input robustness are critical.

FAQ

What is the maximum operating supply voltage for MAX9140AAXK/V+?

The absolute maximum supply voltage (VCC to GND) for MAX9140AAXK/V+ is +6V, but the recommended operating range is 2.7V to 5.5V per the Electrical Characteristics table. Operation outside 2.7–5.5V may cause parametric degradation or reliability risk. The MAX9140AAXK/V+ datasheet specifies all performance parameters within this 2.7–5.5V window, and the device is characterized for rail-to-rail input operation only within this supply range.

Does MAX9140AAXK/V+ include internal hysteresis, and what is its value?

Yes, MAX9140AAXK/V+ includes fixed internal hysteresis of 1.5mV, specified as VHYST in the Electrical Characteristics table. This hysteresis creates distinct upper and lower trip points to prevent output oscillation during slow-moving or noisy input transitions. The hysteresis is inherent to the comparator core and requires no external components - a key differentiator from standard comparators that demand external resistor networks for stability.

Is MAX9140AAXK/V+ AEC-Q100 qualified?

No, MAX9140AAXK/V+ itself is not AEC-Q100 qualified. Only the tape-and-reel variant MAX9140AAXK/V+T is explicitly listed in the Ordering Information table as AEC-Q100 Qualified. The "/V+" suffix denotes automotive-grade temperature range (–40°C to +125°C) and enhanced reliability screening, but formal AEC-Q100 certification applies solely to the "+T" version per the datasheet's Features and Ordering Information sections.

What is the input common-mode voltage range for MAX9140AAXK/V+?

The input common-mode voltage range for MAX9140AAXK/V+ is –0.2V to VCC + 0.2V, as specified in the Electrical Characteristics table under "Input Voltage Range (VCMR)". This rail-to-rail capability allows the device to accurately compare signals that extend slightly below ground or above the positive supply - essential for interfacing with sensors like thermocouples or bridge amplifiers without external level-shifting circuitry.

Can MAX9140AAXK/V+ drive standard TTL or CMOS logic directly?

Yes, MAX9140AAXK/V+ can drive standard TTL and CMOS logic directly. Its outputs swing to within 300mV of VCC (VOH ≥ VCC–0.425V at 4mA) and to within 300mV of GND (VOL ≤ 0.425V at 4mA), meeting the DC voltage thresholds for both 3.3V and 5V logic families. No external pull-up resistors are required, simplifying interface design and reducing component count in mixed-signal systems.