Analog Devices Inc./Maxim Integrated MAX40026ATA/VY+

Overview

The MAX40026ATA/VY+ from Maxim Integrated is a single-supply, high-speed LVDS comparator with 280ps typical propagation delay, 1.5mV internal hysteresis, and AEC-Q100 automotive qualification. It operates from 2.7V to 3.6V over –40°C to +125°C, features 25ps overdrive dispersion, and delivers LVDS differential outputs (247–454mV swing) for time-of-flight distance measurement in LIDAR systems.

For engineers reviewing the MAX40026ATA/VY+ datasheet, MAX40026ATA/VY+ pinout, MAX40026ATA/VY+ application, or MAX40026ATA/VY+ equivalent, key selection considerations include its AEC-Q100-qualified 8-pin TDFN package, 1.5mV hysteresis, LVDS output compatibility with FPGAs/CPUs, and ultra-low dispersion for precision timing-critical sensing.

Technical Context

The MAX40026ATA/VY+ implements a high-speed current-mode comparator core with front-end protection diodes and 50Ω input resistors, enabling 1.5V to V_DD+0.1V input common-mode range-compatible with outputs of transimpedance amplifiers like the MAX40658. Its LVDS output stage uses switched 3.25mA current sources into a 100Ω differential termination.

Propagation delay skew between OUT+ and OUT− is limited to 10ps, and jitter is 2ps under 100mV overdrive with 150ps edge rates. The device maintains 1.23V common-mode output voltage independent of supply, supporting robust noise immunity in high-speed digital interfaces.

Key Specifications

Pinout & Package

The MAX40026ATA/VY+ is housed in an 8-pin, 2mm × 2mm TDFN side-wettable package (package code T822Y+3) with exposed paddle (EP) for thermal management. Pins 2 & 3 are GND; pins 6 & 7 are VCC; EP must be connected to ground.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX40026ATA/VY+, the MAX40025AAWT+ offers identical speed and hysteresis but lacks automotive qualification and uses a smaller WLP package, while the TLV3501AIDBVR trades LVDS compatibility and sub-ns performance for lower cost and wider availability in non-automotive contexts.

Availability

The MAX40026ATA/VY+ is available at Aetrix Electronics and suitable for LIDAR time-of-flight receivers, automotive ADAS sensor interfaces, and high-speed oscilloscope trigger circuits requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.

Supply support for MAX40026ATA/VY+ 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 applications, with emphasis on high-performance timing, sensing, and interface solutions.

The MAX40026 belongs to Maxim's ultra-high-speed comparator product line, engineered specifically for time-of-flight distance measurement systems requiring sub-nanosecond propagation delay, ultra-low dispersion, and automotive-grade reliability.

FAQ

What is the operating temperature range for the MAX40026ATA/VY+?

The MAX40026ATA/VY+ is rated for continuous operation from –40°C to +125°C, meeting AEC-Q100 Grade 1 requirements. This range is validated across all electrical specifications including propagation delay, hysteresis, and LVDS output swing. The device's thermal design-using the exposed paddle in the 8-TDFN package-ensures reliable junction temperatures below 150°C under typical 17mA supply current conditions at maximum ambient.

Does the MAX40026ATA/VY+ require external hysteresis components?

No, the MAX40026ATA/VY+ integrates a fixed 1.5mV hysteresis to improve noise immunity in automotive and industrial environments. This eliminates the need for external positive feedback resistors or capacitors, simplifying PCB layout and avoiding stability risks associated with parasitic phase shift. The internal hysteresis is factory-trimmed and remains stable across temperature and supply voltage variations within the 2.7V–3.6V range.

Can the MAX40026ATA/VY+ interface directly with FPGA LVDS inputs?

Yes, the MAX40026ATA/VY+ provides true LVDS outputs compliant with ANSI/TIA/EIA-644-A: differential swing of 247–454mV and common-mode voltage of 1.125–1.375V. When terminated with a 100Ω resistor between OUT+ and OUT−, it drives standard FPGA LVDS I/O banks (e.g., Xilinx 7-series, Intel Cyclone V) without level shifters or AC coupling. Output skew is limited to 10ps, ensuring deterministic timing alignment across differential pairs.

What is the input protection architecture of the MAX40026ATA/VY+?

The MAX40026ATA/VY+ employs dual 50Ω series resistors and two back-to-back diode pairs between IN+ and IN−, limiting differential input voltage to ≤1.4V (2 × V_F) and protecting the internal comparator core. This architecture allows safe operation with large transient inputs while maintaining 2pF input capacitance and preserving high-speed response. Input bias current remains below 10µA when differential voltage stays within the 2V_F limit.

How does the MAX40026ATA/VY+ achieve ultra-low overdrive dispersion?

The MAX40026ATA/VY+ achieves 25ps typical overdrive dispersion (10mV–1V) through a carefully balanced current-mode front-end and matched LVDS output drivers. Its propagation delay variation is minimized by symmetric transistor sizing, low-parasitic interconnect routing, and process-tolerant biasing-verified across process corners and temperature. This dispersion performance is measured using square-wave stimuli with 150ps edge rates and confirmed in production characterization, not just simulation.