Analog Devices Inc./Maxim Integrated MAX40025CAWT+

Overview

MAX40025CAWT+ from Maxim Integrated is a single-supply, ultra-high-speed LVDS comparator with 280ps typical propagation delay, 25ps overdrive dispersion, and no internal hysteresis-designed for precision time-of-flight distance measurement in LIDAR receivers where signal fidelity and timing consistency are critical.

For engineers reviewing the MAX40025CAWT+ datasheet, MAX40025CAWT+ pinout, MAX40025CAWT+ application, or MAX40025CAWT+ equivalent, this device delivers deterministic low-jitter differential output timing, supports 2.7V–3.6V supply operation, interfaces directly with FPGA LVDS inputs, and targets high-speed optical sensing systems requiring sub-300ps latency and minimal pulse distortion.

Technical Context

The MAX40025CAWT+ employs a fully differential input stage with 1.5V to V_DD+0.1V common-mode range-compatible with outputs of high-speed TIAs like the MAX40658-and uses switched 3.25mA current-source LVDS outputs terminated externally with 100Ω.

Its architecture eliminates internal hysteresis (0mV), enabling detection of fast, low-amplitude transients without threshold offset; propagation delay skew between OUT+ and OUT− is limited to 10ps, and jitter is 2ps RMS under 100mV overdrive with 150ps edge rates.

Key Specifications

Pinout & Package

MAX40025CAWT+ is housed in a 1.218mm × 0.818mm, 6-bump wafer-level package (WLP) with bottom-side solder bumps. The package is RoHS-compliant and optimized for minimal parasitic inductance in high-frequency optical receiver layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX40025CAWT+, MAX40025AAWT+ adds hysteresis at the cost of threshold ambiguity for microvolt-level signals, while MAX40026ATA+ trades WLP size and speed for automotive qualification and manufacturability-neither is pin-compatible due to differing package footprints and bump layouts.

Availability

MAX40025CAWT+ is available at Aetrix Electronics and suitable for LIDAR time-of-flight receivers, high-speed optical pulse detection, and differential trigger generation requiring stable component supply, full traceability, and long-term production support.

Supply support for MAX40025CAWT+ 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 is a semiconductor company specializing in analog and mixed-signal ICs for precision sensing, power management, and high-speed signal processing.

The MAX40025 family was designed specifically for ultra-low-latency, low-dispersion time-of-flight measurement in optical distance sensing-prioritizing propagation delay consistency over general-purpose comparator features.

FAQ

What is the hysteresis specification for MAX40025CAWT+?

The MAX40025CAWT+ has no internal hysteresis (0mV), as confirmed in the datasheet's Electrical Characteristics table and Detailed Description section. This design enables precise detection of fast, low-amplitude signals without threshold-induced timing uncertainty-making it ideal for LIDAR pulse timing where signal edges must be captured without amplitude-dependent delay variation. The absence of hysteresis is a key differentiator from the MAX40025AAWT+ and MAX40026 variants.

Does MAX40025CAWT+ support direct connection to FPGA LVDS inputs?

Yes, MAX40025CAWT+ provides true LVDS-compliant outputs: differential swing of 247–454mV, common-mode voltage of 1.125–1.375V (typ. 1.23V), and 100Ω differential termination requirement-all matching standard LVDS receiver specifications. Its 3.25mA current-source output stage drives FPGA LVDS inputs directly without level-shifting circuitry, provided the 100Ω termination resistor is placed between OUT+ and OUT− as specified in the Applications Information section.

What is the maximum input slew rate tolerance for stable operation of MAX40025CAWT+?

The MAX40025CAWT+ is characterized for stable operation with input slew rates ≥1V/μs, as stated in the Applications Information section. Below this threshold, noise-induced chattering or oscillation may occur due to insufficient edge rate to overcome internal delays and parasitic feedback. For optimal performance in time-of-flight applications, the input signal-typically sourced from a TIA like the MAX40658-must exhibit fast edges (≤150ps rise/fall times) to maintain the 280ps propagation delay and 25ps dispersion specs.

Can MAX40025CAWT+ operate from a 2.5V supply?

No, MAX40025CAWT+ requires a minimum supply voltage of 2.7V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. Operation below 2.7V is not guaranteed and may result in degraded propagation delay, increased overdrive dispersion, or failure to meet LVDS output voltage specifications. The device is optimized for 3.3V nominal operation, drawing 17–23mA supply current in that range.

What package type and footprint does MAX40025CAWT+ use?

MAX40025CAWT+ uses a 6-bump wafer-level package (WLP) measuring 1.218mm × 0.818mm, with package code W60D1+1 and land pattern referenced in Application Note 1891. It has no leads-interconnection is via solder bumps on the bottom surface-and requires careful PCB layout per the Critical Layout Guidelines, including ground keep-out under signal traces and localized 10nF bypass capacitors at V_CC/GND pins.