MAX155BEWI+

Analog To Digital Converters (ADC) Overview

The MAX155BEWI+ is an 8-bit, 8-channel analog-to-digital converter (ADC) featuring simultaneous track-and-hold inputs and a 2.5V internal reference. It operates from a single +5V supply or dual ±5V supplies, supporting unipolar and bipolar conversions in single-ended or differential modes. The device utilizes a successive approximation register (SAR) architecture with a conversion time of 3.6µs per channel. Data is stored in an internal 8x8 RAM and accessed via a parallel interface. The component is housed in a 28-pin wide SOIC package and supports an operating temperature range of -40°C to +85°C.

Analog To Digital Converters (ADC) Feature Summary

• Eight simultaneously sampling track-and-hold inputs eliminate timing differences between channel samples.
• Integrated 2.5V voltage reference reduces external component count.
• Internal 8x8 RAM stores conversion results for sequential access.
• Flexible configuration allows mixed single-ended and differential input setups.

Analog To Digital Converters (ADC) Applications

• Phase-sensitive data acquisition systems
• Vibration and waveform analysis equipment
• DSP analog input interfaces
• AC power meters
• Portable data loggers

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'E' indicates the extended industrial temperature range (-40°C to +85°C). Confirm the 'W' suffix corresponds to the Wide SO-28 package type. Ensure the '+' suffix denotes compliance with current environmental standards. Cross-reference the manufacturer part number with official distributor catalogs to confirm availability status.

Analog To Digital Converters (ADC) Selection Notes

Select this component when simultaneous multi-channel sampling is required without inter-channel skew. The integrated reference simplifies board layout compared to discrete solutions. Consider the 8-bit resolution and 250kS/s effective throughput for moderate-speed applications. Verify that the parallel interface logic levels match the host microcontroller specifications.

Analog To Digital Converters (ADC) Part Context

This device belongs to the MAX155/MAX156 family of high-speed multichannel ADCs. The MAX155 variant provides eight analog channels, whereas the MAX156 offers four channels. Both share identical core architectures, including the SAR converter and simultaneous sampling capabilities. The BEWI+ designation specifies the electrical grade, package style, and environmental compliance for the eight-channel version.

Analog To Digital Converters (ADC) Replacement Considerations

The MAX156AEWI+ serves as a related alternative within the same family but provides only four analog input channels instead of eight. Designers requiring fewer channels may consider this option, though pin compatibility must be verified against the specific circuit implementation.