Analog Devices Inc./Maxim Integrated MAX40025AAWT+T

Overview

MAX40025AAWT+T from Maxim Integrated is a single-supply, ultra-high-speed LVDS comparator with 280ps typical propagation delay, 25ps overdrive dispersion, and 2.5mV internal hysteresis-designed for precision time-of-flight distance measurement in LIDAR receivers where input compatibility with MAX40658 TIA outputs and low-jitter differential signaling are critical.

For engineers reviewing the MAX40025AAWT+T datasheet, MAX40025AAWT+T pinout, MAX40025AAWT+T application, or MAX40025AAWT+T equivalent, this page delivers verified package mapping (6-bump WLP), confirmed LVDS output behavior, validated timing specs under 2.7V–3.6V supply, and real-world use context in high-speed optical sensing systems.

Technical Context

The MAX40025AAWT+T implements a fully differential front-end with rail-to-rail input common-mode range (1.5V to V_DD + 0.1V), enabling direct interfacing with transimpedance amplifier outputs like those of the MAX40658. Its internal hysteresis (2.5mV) suppresses noise-induced chatter without external feedback components.

LVDS output stage delivers 350mV typical differential swing into 100Ω, with matched common-mode voltage (1.23V) and <10ps output skew-ensuring clean, low-EMI digital transitions compatible with FPGA LVDS inputs. Propagation delay remains stable across 10mV–1V overdrive (25ps dispersion) and input slew rates from 0.4V/μs to 1V/μs.

Key Specifications

Pinout & Package

MAX40025AAWT+T uses a 6-bump wafer-level package (WLP), outline 21-100296, footprint per Application Note 1891, dimensions 1.218mm × 0.818mm. Thermal resistance θ_JA = 95.15°C/W (four-layer board).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX40025AAWT+T, MAX40026ATA+ trades WLP size and 4Gbps toggle rate for automotive qualification and manufacturability, while TLV3501AIDBVR lacks both LVDS output and sub-nanosecond timing-making MAX40025AAWT+T the sole option for space-constrained, high-precision ToF receivers.

Availability

MAX40025AAWT+T is available at Aetrix Electronics and suitable for LIDAR time-of-flight receivers, high-speed oscilloscope trigger circuits, and differential communication line receivers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX40025AAWT+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, with emphasis on signal integrity, power efficiency, and reliability.

The MAX40025 family targets ultra-high-speed optical sensing systems-specifically engineered to replace discrete comparator + level-shifter + driver combinations in LIDAR and test equipment with a single, optimized LVDS solution.

FAQ

What is the exact package type and footprint for MAX40025AAWT+T?

The MAX40025AAWT+T uses a 6-bump wafer-level package (WLP) with dimensions 1.218mm × 0.818mm, outline number 21-100296, and land pattern defined in Maxim Application Note 1891. It is not pin-compatible with the 8-TDFN MAX40026 variants, and requires micro-soldering process control due to its bump pitch and lack of leads.

Does MAX40025AAWT+T require external hysteresis components?

No. The MAX40025AAWT+T integrates a fixed 2.5mV hysteresis, eliminating the need for external positive feedback resistors. This design choice prevents stability issues and layout sensitivity common in high-speed comparators, and is explicitly documented in the Electrical Characteristics table under "Input Hysteresis" for MAX40025A grade parts.

Can MAX40025AAWT+T interface directly with FPGA LVDS inputs?

Yes. The MAX40025AAWT+T features true LVDS outputs with 350mV typical differential swing and 1.23V common-mode voltage, meeting ANSI/TIA-644-A specifications. When terminated with a 100Ω resistor between OUT+ and OUT−, it drives Xilinx 7-series, Intel Cyclone V, and other FPGA LVDS I/O banks without level-shifting or AC-coupling.

What is the minimum input slew rate required for stable operation of MAX40025AAWT+T?

The MAX40025AAWT+T requires an input slew rate greater than 1V/μs to avoid noise-induced chattering near threshold, as specified in the Applications Information section. Slower slew rates increase susceptibility to oscillation and false triggering-especially critical in low-amplitude optical pulse detection where signal integrity is paramount.

How does MAX40025AAWT+T handle input voltages exceeding the supply rail?

The MAX40025AAWT+T supports input common-mode voltages up to V_DD + 0.1V, enabled by internal protection circuitry including 50Ω series resistors and back-to-back diodes between IN+ and IN−. This allows direct connection to MAX40658 TIA outputs without clamping or attenuation, provided differential input voltage stays below 1.4V (2 × V_F).