MAX186DEWP+

ADCs/DACs - Special Purpose Overview

The MAX186DEWP+ is a low-power, 8-channel, serial 12-bit analog-to-digital converter (ADC) from Analog Devices Inc./Maxim Integrated. It integrates an 8-channel multiplexer, high-bandwidth track/hold circuitry, and a successive-approximation ADC core. The device operates on a single +5V supply or dual ±5V supplies, supporting software-configurable unipolar/bipolar and single-ended/differential input modes. It features an internal 4.096V reference and a 4-wire serial interface compatible with SPI, QSPI, and MICROWIRE protocols. The component is housed in a 20-pin SO package and supports industrial temperature ranges.

ADCs/DACs - Special Purpose Feature Summary

• 12-bit resolution with 8 single-ended or 4 differential analog inputs
• Internal 4.096V reference voltage and reference-buffer amplifier
• Low power consumption: 1.5mA operating current, 2µA full power-down mode
• 133ksps sampling rate with internal track/hold circuitry
• Software-selectable unipolar/bipolar input configurations

ADCs/DACs - Special Purpose Applications

• Portable data logging systems
• High-accuracy process control instrumentation
• Automatic testing equipment
• Battery-powered instruments
• Medical instruments

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific grade suffix for the MAX186DEWP+ against the manufacturer's ordering information to ensure compliance with required accuracy grades (A, B, C, or D). Confirm that the 20-pin SO package matches the design footprint. Check RoHS compliance status as indicated by the '+' suffix. Ensure the operating temperature range aligns with system requirements.

ADCs/DACs - Special Purpose Selection Notes

Select the MAX186DEWP+ when an integrated solution for multi-channel signal acquisition is required without external multiplexers. Choose this part for applications needing low power consumption with quick turn-on times. Consider the internal clock mode for simplified microprocessor interfaces or external clock mode for precise timing synchronization. Verify input voltage ranges match the application's unipolar or bipolar needs.

ADCs/DACs - Special Purpose Part Context

The MAX186DEWP+ belongs to the MAX186/MAX188 family of low-power, 8-channel, serial 12-bit ADCs. The MAX186 variant includes an internal reference, whereas the MAX188 requires an external reference. Both share identical pinouts and functionality except for the reference configuration. The 'E' suffix typically denotes an extended temperature range (-40°C to +85°C), while 'D' may indicate a specific grade or commercial range depending on the exact datasheet revision.

ADCs/DACs - Special Purpose Replacement Considerations

Direct replacements within the same family include other MAX186 grades (e.g., MAX186CEWP+, MAX186AEWP+) with different accuracy specifications. For external reference applications, the MAX188 series is functionally equivalent. Ensure any substitute maintains the 20-pin SO package and compatible serial interface timing.