Analog Devices Inc./Maxim Integrated MAX1403EAI+T

Overview

MAX1403EAI+T from Maxim Integrated is a fully assembled, factory-tested evaluation kit designed to accelerate development with the MAX1403 low-power, multichannel sigma-delta analog-to-digital converter. It includes a proven 3" × 4" PCB layout, onboard 2.4576MHz ceramic resonator (Murata CST2.45MGW040), MAX6520EUR 1.2V voltage reference, and preconfigured anti-aliasing RC filters (R=100Ω, C=100pF) on all five analog inputs (AIN1–AIN5). The kit supports full-speed sampling up to 8192 points and enables calibration using CALOFF/CALGAIN channels for offset and gain correction.

For engineers reviewing the MAX1403EAI+T datasheet, MAX1403EAI+T pinout, MAX1403EAI+T application, or MAX1403EAI+T equivalent, this board provides immediate Windows 95/98-compatible software control, register-level access via SPI interface, real-time configuration of SINC1/SINC3 filtering, PGA gain (1×–128×), unipolar/bipolar input range selection, and burnout current test (0.1µA) - all without requiring custom firmware or hardware design.

Technical Context

The MAX1403EAI+T implements a complete, self-contained evaluation platform centered on the MAX1403 ADC, interfaced via a 40-pin header to the Maxim 68HC11 microcontroller module (68L11DMODULE). It operates from a single +5V to +12V DC supply and uses an external 2.4576MHz ceramic resonator for clock generation, matching the MAX1403's native CLKIN frequency requirement.

Hardware features include configurable jumper settings (JU1–JU8) for reference selection (onboard U2 vs. external), calibration channel routing, and MAX1401 compatibility mode; dual power domains (AVDD/DVDD) with separate analog/digital filtering (R7/C10, R8/C11); and SPI-compatible signal routing (SCLK, DIN, DOUT, CS, RESET, INT) aligned to J1 pinout per MAX1403 datasheet timing specifications.

Key Specifications

Availability

MAX1403EAI+T is available at Aetrix Electronics and suitable for industrial data acquisition, sensor interface prototyping, and precision instrumentation applications requiring stable component supply, traceable sourcing, and long-term BOM continuity.

Supply support for MAX1403EAI+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, medical, and communications systems.

The MAX1403EAI+T belongs to Maxim's precision data-acquisition evaluation kit product line, engineered to reduce time-to-test for sigma-delta ADCs by providing validated hardware, calibrated firmware, and production-ready layout - eliminating the need for users to design, prototype, and debug evaluation infrastructure from scratch.

FAQ

What is the MAX1403EAI+T used for?

The MAX1403EAI+T is a ready-to-use evaluation kit for the MAX1403 16-bit sigma-delta ADC. It enables rapid validation of key performance parameters including noise-free resolution, SINC1/SINC3 filter behavior, PGA gain accuracy, and calibration stability - directly from a Windows PC without custom hardware or firmware development. Engineers use the MAX1403EAI+T to verify system-level integration before committing to custom PCB design.

Does the MAX1403EAI+T include the MAX1403 IC?

Yes, the MAX1403EAI+T includes the MAX1403CAI (not EAI+T) as U1 on the board - a 28-pin SOIC package variant of the MAX1403 ADC rated for 0°C to +70°C operation. The "EAI+T" suffix in the kit part number refers to the evaluation kit itself, not the mounted ADC. The onboard MAX1403CAI is fully populated, soldered, and tested per Maxim's EV kit quality standards.

Can the MAX1403EAI+T evaluate the MAX1401?

Yes, the MAX1403EAI+T can evaluate the MAX1401 by shorting jumpers JU6 and JU7, as documented in the MAX1403 EV system manual. This reconfigures pins 5–8 to expose the internal multiplexer output instead of digital I/O and current sources, aligning with the MAX1401's pin functionality. A free MAX1401CAI sample must be ordered separately to replace U1.

What software and drivers are required for the MAX1403EAI+T?

The MAX1403EAI+T requires the original Windows 95/98-compatible software suite (MAX1403.EXE, KIT1403.L11, MAX1403.HLP) delivered on a 3.5" floppy disk. No modern OS drivers are provided; operation relies on serial communication (RS-232) with the 68HC11 module. Source code in C++ and 68HC11 assembly is included for porting or adaptation, but no Windows 10/11 compatibility or USB virtual COM support is available.

Is the MAX1403EAI+T RoHS compliant?

The MAX1403EAI+T was released in May 1999 (Rev 0, 19-1490), predating RoHS legislation (2006). While Maxim does not publish formal RoHS status for legacy EV kits, the bill of materials contains no intentionally added leaded solder or restricted substances beyond exemption thresholds typical of late-1990s industrial PCBs. For compliance-critical designs, users should verify material declarations with Analog Devices' legacy product support team.