Analog Devices Inc./Maxim Integrated MAX125EVKIT

Overview

MAX125EVKIT from Maxim Integrated is an evaluation kit for the MAX125 14-bit, simultaneous-sampling data-acquisition system (DAS), featuring four track/hold amplifiers, ±5V input range, 3µs per-channel conversion time, and parallel DSP interface compatibility. It enables rapid validation of high-precision, phase-coherent multichannel acquisition in motor control and power-grid monitoring systems.

For engineers reviewing the MAX125EVKIT datasheet, MAX125EVKIT pinout, MAX125EVKIT application, or MAX125EVKIT equivalent, this kit provides full hardware access to the MAX125's 36-pin SSOP interface, on-board clock generation, reference buffering, analog input conditioning, and interrupt-driven read sequencing - all configured for immediate functional verification against real-world signal sources.

Technical Context

The MAX125EVKIT implements a complete test platform for the MAX125 DAS IC, including a 16MHz TTL-compatible oscillator, buffered +2.5V reference (REFOUT), 4.7µF REFOUT bypass, 0.1µF REFIN bypass, and fault-protected ±17V input multiplexer circuitry. It supports both internal and external reference operation and delivers full timing compliance with MAX125's CONVST-triggered sampling, INT-driven data-read protocol, and bidirectional A0–A3/D0–D13 interface.

Designed for direct connection to DSPs and 16-/32-bit µPs, the kit replicates production-level power-supply decoupling (0.1µF ceramic caps on AVDD/AVSS/DVDD), separate AGND/DGND routing, and analog/digital ground plane isolation - enabling accurate measurement of INL (±4 LSB), SINAD (72–75 dB), and channel-to-channel isolation (80 dB) under real operating conditions.

Key Specifications

Availability

MAX125EVKIT is available at Aetrix Electronics and suitable for multiphase motor control development, power-grid synchronization prototyping, and vibration analysis system validation requiring stable component supply and full-featured evaluation infrastructure.

Supply support for MAX125EVKIT 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and computing applications.

The MAX125EVKIT belongs to Maxim's precision data-acquisition evaluation platform family, designed specifically to accelerate design-in of simultaneous-sampling DAS solutions in applications demanding phase coherence, high DC accuracy, and robust noise immunity.

FAQ

What is the primary function of the MAX125EVKIT?

The MAX125EVKIT is a fully assembled and tested evaluation platform for the MAX125 14-bit simultaneous-sampling data-acquisition system. It provides immediate access to all MAX125 pins, on-board clock and reference circuitry, proper power-supply decoupling, and signal-conditioning paths - enabling engineers to verify timing behavior, dynamic performance (SINAD, THD), and multichannel phase alignment without custom PCB design. The MAX125EVKIT supports all eight analog inputs and full parallel interface operation out of the box.

Does the MAX125EVKIT support both MAX125 and MAX126 devices?

The MAX125EVKIT is optimized for the MAX125 (±5V input range), but its hardware architecture - including reference configuration, input protection, and power rails - is compatible with the pin-compatible MAX126 (±2.5V range). Users must adjust REFIN/REFOUT biasing and input scaling per the MAX126's reduced full-scale range; no board modification is required. Both devices share identical pinout, timing, and interface logic, making the MAX125EVKIT a dual-purpose platform for comparative evaluation.

How does the MAX125EVKIT handle analog and digital grounding?

The MAX125EVKIT implements strict analog/digital ground separation using dedicated AGND and DGND copper planes, tied together only at a single low-impedance star point near the MAX125's ground pins (pins 8 and 36 for AGND, pin 18 for DGND). This layout prevents digital switching noise from coupling into sensitive analog sampling paths. All analog supply bypassing (AVDD/AVSS) connects directly to AGND, while DVDD bypassing ties to DGND - preserving the MAX125's specified ±4 LSB INL and 80 dB channel isolation.

Can the MAX125EVKIT be used with external processors or FPGAs?

Yes - the MAX125EVKIT exposes all critical control and data signals (CONVST, RD, WR, CS, CLK, INT, D0–D13, A0–A3) via standard 0.1"-spaced headers with 3.3V/5V-tolerant buffering. Its timing complies with common DSPs (e.g., TMS320Cxx) and microprocessors, eliminating wait states. The MAX125EVKIT also includes jumper-selectable voltage translation options and configurable pull-ups/pull-downs to match host logic families, ensuring reliable handshaking and data capture across diverse controller platforms.

What documentation and resources ship with the MAX125EVKIT?

The MAX125EVKIT ships with a printed quick-start guide, schematic diagram (Rev 3, 7/08), bill-of-materials, and access to the full MAX125/MAX126 datasheet (19-1319) and application notes (e.g., AN3727 on motor control). No software or firmware is included - users implement their own host-side drivers to issue CONVST pulses, monitor INT, and perform sequential RD reads per the MAX125's memory-mapped 4-word buffer protocol. All design files are available for download from Maxim's website.