Analog Devices Inc./Maxim Integrated MAX11040EVKIT+

Overview

The MAX11040EVKIT+ from Maxim Integrated is an evaluation kit designed to accelerate development and validation of the MAX11040K 24-bit, 4-channel, simultaneous-sampling sigma-delta ADC. It provides full hardware access to all analog inputs (AIN0±–AIN3±), reference paths (REFIO, REF0–REF3), serial interface (SPI/QSPI/MICROWIRE), cascade control (CASCIN/CASCOUT), synchronization (SYNC), and fault monitoring (FAULT/OVRFLW). The kit supports programmable output data rates from 0.25ksps to 64ksps, ±2.2V differential input range, and 117dB SNR at 1ksps - enabling high-accuracy energy measurement and power-system monitoring.

For engineers reviewing the MAX11040EVKIT+ datasheet, MAX11040EVKIT+ pinout, MAX11040EVKIT+ application, or MAX11040EVKIT+ equivalent, this kit delivers production-representative signal chain performance with on-board crystal oscillator (24.576MHz), buffered reference, overvoltage-protected analog inputs (±6V fault tolerance), and daisy-chain capability for up to eight devices (32-channel synchronized sampling).

Technical Context

The MAX11040EVKIT+ implements the complete signal path of the MAX11040K ADC, including its four independent 24-bit sigma-delta modulators, digital decimation filters with programmable -3dB bandwidth (0.11kHz to 13.5kHz), and cascaded SPI interface supporting single-command readout from up to eight synchronized devices. It integrates the internal 24.576MHz crystal oscillator and allows external clock injection via XIN.

Hardware features include jumper-selectable internal/external reference mode, configurable sampling phase delay (0–333μs in 1.33μs steps), SYNC input for multi-device timing alignment, and open-drain FAULT/OVRFLW outputs with 30kΩ internal pullups. All analog and digital supplies (AVDD/DVDD) are independently regulated and bypassed per datasheet layout guidelines.

Key Specifications

Availability

MAX11040EVKIT+ is available at Aetrix Electronics and suitable for power-protection relay equipment, multiphase power systems, industrial data-acquisition systems, and medical instrumentation requiring stable component supply and rapid prototyping support.

Supply support for MAX11040EVKIT+ 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, automotive, and communications applications.

The MAX11040K product line was designed specifically for high-accuracy energy measurement and power-quality monitoring, delivering simultaneous sampling, phase compensation, and robust fault detection in harsh electrical environments.

FAQ

What is the primary function of the MAX11040EVKIT+?

The MAX11040EVKIT+ is an evaluation platform for the MAX11040K 24-bit, 4-channel simultaneous-sampling sigma-delta ADC. It provides a fully configured, production-ready hardware environment to validate signal chain performance, test cascade synchronization, evaluate programmable sampling phase compensation, and verify fault detection behavior - all using the exact MAX11040K silicon and reference design layout.

Does the MAX11040EVKIT+ support external clock sources?

Yes, the MAX11040EVKIT+ supports both internal and external clocking. It includes a 24.576MHz crystal connected between XIN and XOUT for internal oscillator operation, but also allows direct injection of an external clock signal into the XIN pin with XOUT left unconnected - matching the dual-clock capability of the underlying MAX11040K device.

Can the MAX11040EVKIT+ be used to evaluate multi-device synchronization?

Yes, the MAX11040EVKIT+ implements full multi-device synchronization capability via dedicated SYNC, DRDYIN/DRDYOUT, CASCIN/CASCOUT, and FAULT/OVRFLW pins. It enables hardware-level validation of time-aligned sampling across up to eight MAX11040K devices - critical for accurate phase-angle measurement in 3-phase power systems and protection relays.

What reference voltage options does the MAX11040EVKIT+ provide?

The MAX11040EVKIT+ supports both internal and external reference modes. It uses the MAX11040K's integrated 2.5V reference (±50ppm/°C drift) by default, but includes jumpers to disconnect REFIO and connect an external 2.3V–2.7V reference source - allowing evaluation of system-level accuracy trade-offs and noise sensitivity under different reference conditions.

How does the MAX11040EVKIT+ handle analog input overvoltage events?

The MAX11040EVKIT+ preserves the MAX11040K's ±6V analog input overvoltage tolerance and active-fault signaling. When any AIN_+ or AIN_- exceeds the ±2.25V to ±2.65V fault thresholds, the FAULT pin asserts low within 2.5µs. This open-drain output includes a 30kΩ internal pullup, enabling wire-NOR fault aggregation across multiple kits or devices in a system.