Analog Devices Inc./Maxim Integrated MAX22531EVKIT#

Overview

MAX22531EVKIT# from Analog Devices is a fully assembled and tested evaluation kit designed to assess the MAX22531 quad-channel isolated ADC with integrated field-side power supply. It supports up to 110V DC input via on-board 1:61 resistive dividers, delivers USB-powered operation (no external field supply required), and enables real-time ADC sampling, comparator configuration, and register-level control via Windows GUI software.

For engineers reviewing the MAX22531EVKIT# datasheet, MAX22531EVKIT# pinout, MAX22531EVKIT# application, or MAX22531EVKIT# equivalent, this kit provides immediate hardware access to SPI-controlled isolated analog-to-digital conversion, digital input monitoring, interrupt-driven status reporting, and configurable threshold-based event detection for industrial voltage sensing systems.

Technical Context

The MAX22531EVKIT# interfaces directly with the MAX22531 IC (20-pin SSOP) installed on board, featuring galvanically isolated logic and field sides separated by PCB stitching capacitance compliant with CISPR32 radiated emissions standards. It implements a fixed 1:61 input attenuation network across four channels (J2 terminals 1–4), scaling 0–110V inputs to 0–1.8V at the AIN pins.

Communication occurs over USB via an FTDI-based UART-to-SPI bridge (U4, QFN64-EP), supporting full 10MHz SPI clock rates. The kit offers dual power modes: default USB-derived 3.3V logic/PL supply (via jumpers J3/J4 in 1–2/2–3 positions), or external low-voltage supplies applied to VDDL_EXT and VDDPL test points.

Key Specifications

Availability

MAX22531EVKIT# is available at Aetrix Electronics and suitable for industrial automation, motor drive monitoring, and energy metering applications requiring stable component supply, rapid prototyping validation, and production-ready signal chain evaluation.

Supply support for MAX22531EVKIT# 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

Analog Devices is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and industrial systems.

The MAX2253x product line delivers isolated, multi-channel ADCs with integrated field-side power for direct high-voltage sensing in programmable logic controllers, circuit breakers, and industrial IoT edge nodes.

FAQ

What is the primary function of the MAX22531EVKIT#?

The MAX22531EVKIT# is a ready-to-use evaluation platform for the MAX22531 quad-channel isolated ADC. It enables engineers to validate performance-including 110V input scaling, SPI register access, comparator threshold configuration, and interrupt behavior-without designing custom hardware. The MAX22531EVKIT# includes pre-installed firmware, USB interface, and Windows GUI software for immediate functional testing.

Does the MAX22531EVKIT# require an external power supply for operation?

No-the MAX22531EVKIT# operates entirely from USB power by default. Jumpers J3 (1–2) and J4 (2–3) connect VDDPL and VDDL to the on-board 3.3V regulator. External supplies can be used only when those jumpers are reconfigured, making the MAX22531EVKIT# ideal for lab evaluation without additional bench equipment.

Which IC is physically mounted on the MAX22531EVKIT# board?

The MAX22531EVKIT# has the MAX22531AAP+ (20-pin SSOP package) soldered to the board. This matches the exact device it evaluates and differs from the MAX22530EVKIT#, which uses the MAX22530AWE+ (16-pin WSOIC). The physical IC identity is confirmed in the Bill of Materials and schematic documentation for the MAX22531EVKIT#.

Can the MAX22531EVKIT# be used with microcontrollers or FPGAs instead of the provided PC software?

Yes-by moving SW1 to the OFF position and connecting an external host to the 12-pin header J1, users can bypass the on-board FTDI bridge and communicate directly with the MAX22531 via SPI. Pin assignments for CS, SCLK, MOSI, MISO, INT, and power are documented in Table 3, enabling integration into custom embedded systems without relying on the MAX22531EVKIT# GUI.

What safety protections does the MAX22531EVKIT# provide for high-voltage inputs?

The MAX22531EVKIT# incorporates ±7kV/42Ω IEC 61000-4-5 surge protection on all field-side input terminals (J2 pins 1–4), plus absolute maximum input clamping at –0.3V to +2.0V at each AIN pin. Its 1:61 resistive divider ensures 110V applied to J2 yields ≤1.8V at the MAX22531's analog inputs-preventing damage while maintaining accuracy within the device's specified operating range.