Analog Devices Inc./Maxim Integrated MAX11040DBEVKIT+

Overview

MAX11040DBEVKIT+ from Maxim Integrated is an evaluation kit for the MAX11040K 24-bit, 4-channel, simultaneous-sampling sigma-delta ADC. It enables rapid validation of high-accuracy energy measurement systems requiring synchronized multi-channel acquisition, ±6V overvoltage-protected analog inputs, and programmable sampling phase (0–333μs) for transformer-induced phase-shift compensation. The kit supports full characterization at output data rates from 0.25ksps to 64ksps with 117dB SNR at 1ksps.

For engineers reviewing the MAX11040DBEVKIT+ datasheet, MAX11040DBEVKIT+ pinout, MAX11040DBEVKIT+ application, or MAX11040DBEVKIT+ equivalent, this kit provides hardware-ready access to the MAX11040K's cascaded 32-channel synchronization, SPI/QSPI/MICROWIRE interface, internal 24.576MHz crystal oscillator, ±2.2V differential input range, and industrial-grade -40°C to +105°C operation - all preconfigured on a TSSOP-38 target board with reference layout and decoupling.

Technical Context

The MAX11040DBEVKIT+ implements the complete signal chain for the MAX11040K ADC, including precision buffered reference distribution (REFIO, REF0–REF3), 4 fully differential analog input channels with ±6V fault protection, and a daisy-chain-capable serial interface supporting up to eight devices. It integrates the required 24.576MHz crystal, 1μF/0.01μF AVDD/DVDD bypassing, and DRDY/SYNC timing alignment circuitry for multiphase power system validation.

Designed for IEEE C37.118.1-compliant synchrophasor and Class 0.1/0.2 energy metering, the kit exposes all critical control registers via onboard microcontroller interface and supports external clock injection, adjustable gain calibration, and real-time oversampling ratio tuning - enabling direct correlation between digital filter bandwidth (3.4kHz @ 16ksps), latency (374μs), and channel-to-channel phase matching (<0.0001°).

Key Specifications

Availability

MAX11040DBEVKIT+ is available at Aetrix Electronics and suitable for power-protection relay equipment, multiphase power systems, and industrial data-acquisition systems requiring stable component supply, traceable evaluation hardware, and production-intent reference design validation.

Supply support for MAX11040DBEVKIT+ 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 power management ICs for demanding industrial, automotive, and communications applications.

The MAX11040K product line targets high-accuracy energy measurement and power quality monitoring, delivering simultaneous 24-bit sampling across four channels with integrated phase compensation, cascading capability, and robust fault protection for utility-grade instrumentation.

FAQ

What is the primary function of the MAX11040DBEVKIT+?

The MAX11040DBEVKIT+ is a fully assembled and tested evaluation platform for the MAX11040K 24-bit, 4-channel simultaneous-sampling sigma-delta ADC. It provides immediate hardware access to all device features - including cascaded multi-device synchronization, programmable sampling phase, ±6V overvoltage-protected analog inputs, and SPI-compatible serial interface - enabling rapid validation of energy metering, power protection, and industrial DAQ designs without custom PCB development. The MAX11040DBEVKIT+ includes onboard crystal, reference circuitry, and debug headers for register-level control.

Does the MAX11040DBEVKIT+ support external clock sources?

Yes, the MAX11040DBEVKIT+ supports both internal and external clocking. It ships with a 24.576MHz crystal connected between XIN and XOUT for autonomous operation, but the XIN pin can also accept an external CMOS clock signal (0.25V to DVDD) when the internal oscillator is disabled via the XTALEN bit. This flexibility allows synchronization to master system clocks or precise time bases in synchrophasor applications. The MAX11040DBEVKIT+ routing preserves signal integrity for either configuration.

Can the MAX11040DBEVKIT+ be used to evaluate cascaded configurations?

Yes, the MAX11040DBEVKIT+ is explicitly designed to demonstrate cascaded operation of up to eight MAX11040K devices for 32-channel simultaneous sampling. It includes dedicated CASCIN/CASCOUT headers, DRDYIN/DRDYOUT jumpers, and SYNC termination points that match the timing requirements specified in the MAX11040K datasheet. The board layout follows Maxim's recommended daisy-chain routing guidelines, ensuring reliable inter-device handshaking and deterministic latency alignment across the chain.

What analog input protection features are implemented on the MAX11040DBEVKIT+?

The MAX11040DBEVKIT+ implements the full ±6V overvoltage protection specified for the MAX11040K, with each AIN+ and AIN- pair rated for continuous operation up to ±6V relative to AGND. Fault detection thresholds (VPFT = +2.25V to +2.65V, VNFT = -2.65V to -2.25V) are directly exposed via the FAULT pin, and the board includes pull-up resistors and LED indicators for immediate visual fault status. No external components are required to achieve the datasheet's 2.5μs fault response time.

Is software provided with the MAX11040DBEVKIT+?

Yes, the MAX11040DBEVKIT+ ships with Maxim's official EVKIT software suite, including GUI-based register configuration, real-time waveform capture, FFT analysis, and automated INL/SNR test scripts compatible with Windows and Linux. The software communicates via USB-to-SPI bridge and supports full read/write access to all MAX11040K control registers - including sampling phase, output data rate, reference mode, and fault mask settings - enabling complete functional validation without custom firmware development.