Analog Devices Inc./Maxim Integrated MAX40025CAWT+T

Overview

MAX40025CAWT+T 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+T datasheet, MAX40025CAWT+T pinout, MAX40025CAWT+T application, or MAX40025CAWT+T equivalent, this page delivers verified package mapping (6-bump WLP), confirmed LVDS output behavior, input common-mode range (1.5V to VDD + 0.1V), supply range (2.7V–3.6V), and thermal performance (–40°C to +125°C) without inference or generalization.

Technical Context

The MAX40025CAWT+T implements a fully differential, current-mode LVDS output stage with 3.25mA switched current sources, delivering ±350mV differential swing across a 100Ω termination while maintaining 1.23V common-mode voltage independent of supply. Its input stage includes dual 50Ω series resistors and back-to-back diode clamps for ±1.4V differential input protection.

Propagation delay is defined at the 50% transition point of the differential output (OUT+ to OUT−), with skew between complementary outputs limited to 10ps. Overdrive dispersion remains ≤25ps across 10mV–1V input overdrive, and jitter is 2ps RMS under 100mV overdrive with 150ps edge rates-enabling sub-picosecond timing resolution in pulsed optical detection systems.

Key Specifications

Pinout & Package

MAX40025CAWT+T uses a 6-bump wafer-level package (WLP), outline 21-100296, footprint per Application Note 1891, with 1.218mm × 0.818mm body size and RoHS-compliant + suffix.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX40025CAWT+T, MAX40025AAWT+ adds hysteresis at the cost of small-signal sensitivity, while MAX40026ATA+ trades speed and size for automotive qualification and manufacturability-making MAX40025CAWT+T optimal for space- and timing-critical LIDAR receiver designs.

Availability

MAX40025CAWT+T is available at Aetrix Electronics and suitable for LIDAR time-of-flight receivers, high-speed oscilloscope trigger circuits, and optical distance sensor modules requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for MAX40025CAWT+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, mixed-signal, and high-speed ICs for demanding industrial, communications, and sensing applications.

The MAX40025 family targets ultra-precise timing applications-specifically time-of-flight measurement systems-where sub-nanosecond propagation delay consistency and low overdrive dispersion are non-negotiable design requirements.

FAQ

What is the propagation delay specification for MAX40025CAWT+T, and under what test conditions is it measured?

The MAX40025CAWT+T has a typical propagation delay of 280ps, measured at 100mV overdrive with VCC = 3.3V, VCM = 2.5V, RLOAD = 100Ω across OUT+ and OUT−, and TA = –40°C to +125°C. This value reflects the time from input polarity crossing to the 50% point of the differential output swing (OUT+ to OUT−), as defined in the official datasheet Figure 1 and Table 1.

Does MAX40025CAWT+T include internal hysteresis, and how does that affect its use in LIDAR applications?

No, MAX40025CAWT+T has no internal hysteresis-confirmed in the Ordering Information table and Detailed Description section. This absence allows detection of very small, fast-rising optical pulses without threshold distortion, making MAX40025CAWT+T ideal for high-resolution LIDAR receivers where weak return signals must be captured without missing leading edges.

What package type and dimensions does MAX40025CAWT+T use, and is the land pattern publicly documented?

MAX40025CAWT+T uses a 6-bump wafer-level package (WLP) with outline number 21-100296 and physical dimensions of 1.218mm × 0.818mm. The recommended land pattern is documented in Maxim Integrated Application Note 1891, and full package drawings are available at maximintegrated.com/packages.

Can MAX40025CAWT+T interface directly with FPGA LVDS inputs, and what termination is required?

Yes, MAX40025CAWT+T's LVDS outputs interface directly with FPGA LVDS inputs. A 100Ω termination resistor must be placed across OUT+ and OUT−, either at the comparator output (for short traces) or at the FPGA input (for longer runs), per JEDEC-standard LVDS practice. The output common-mode voltage is fixed at 1.23V, matching standard LVDS receiver thresholds.

What is the maximum differential input voltage the MAX40025CAWT+T can withstand without damage?

The MAX40025CAWT+T input stage includes dual 50Ω series resistors and back-to-back diodes, limiting survivable differential input voltage to approximately ±1.4V (2 × VF, where VF ≈ 0.7V). Beyond this, input current increases linearly per the equation (VIN+ − VIN− − 2 × VF)/(2 × 50), but the internal comparator core remains protected.