MAX186BEWP+

ADCs/DACs - Special Purpose Overview

The MAX186BEWP+ is a low-power, 8-channel, serial 12-bit analog-to-digital converter (ADC) from the MAX186/MAX188 family. It integrates an 8-channel multiplexer, high-bandwidth track/hold circuit, and successive-approximation register (SAR) architecture. The device operates on a single +5V or dual ±5V supply, consuming 1.5mA in operating mode and 2µA in power-down mode. It features an internal 4.096V reference, software-configurable unipolar/bipolar inputs, and a 4-wire serial interface compatible with SPI, QSPI, and MICROWIRE protocols. Packaged in a 20-pin SOIC, it supports sampling rates up to 133ksps.

ADCs/DACs - Special Purpose Feature Summary

• 12-bit resolution with 8 single-ended or 4 differential input channels
• Internal 4.096V reference and reference-buffer amplifier for gain trim simplification
• Ultra-low power consumption: 1.5mA operating, 2µA full power-down
• Software-selectable unipolar/bipolar and single-ended/differential input modes
• 4-wire serial interface compatible with SPI, QSPI, MICROWIRE, and TMS320 DSPs

ADCs/DACs - Special Purpose Applications

• Portable data logging systems
• Data-acquisition applications
• High-accuracy process control
• Automatic testing equipment
• Battery-powered instruments

ADCs/DACs - Special Purpose Procurement Notes

Verify the 'B' grade designation against the datasheet electrical characteristics table, as availability of specific grades may vary by package type. Confirm the 'E' temperature range (-40°C to +85°C) matches application requirements. Ensure the SOIC-20 package dimensions align with PCB layout constraints. Check for lead-free/RoHS compliance status indicated by the '+' suffix.

ADCs/DACs - Special Purpose Selection Notes

Select the MAX186BEWP+ when an internal reference is required; the MAX188 variant requires an external reference. Compare power-down modes (fast vs. full) based on system wake-up time requirements. Ensure source impedance is below 5kΩ or use input capacitors to maintain acquisition accuracy. Verify serial clock frequency compatibility with the chosen microcontroller interface.

ADCs/DACs - Special Purpose Part Context

The MAX186BEWP+ belongs to the MAX186/MAX188 series of low-power, 8-channel, serial 12-bit ADCs. It shares architectural similarities with the MAX180/MAX181 (parallel interface) and MAX146 (3.6V operation). The 'B' grade indicates specific DC accuracy parameters, while the 'E' suffix denotes extended temperature range. The 'WP+' suffix identifies the 20-pin SOIC package with lead-free/RoHS compliance.

ADCs/DACs - Special Purpose Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.