MAX188CEWP

ADCs/DACs - Special Purpose Overview

The MAX188CEWP+ is a low-power, 8-channel, serial 12-bit analog-to-digital converter (ADC) manufactured by Analog Devices / Maxim Integrated. It integrates an 8-channel multiplexer, high-bandwidth track/hold circuitry, and a successive-approximation register (SAR) architecture. The device operates on a single +5V supply or dual ±5V supplies and requires an external reference voltage. It features a 4-wire serial interface compatible with SPI, QSPI, and MICROWIRE protocols. Key electrical specifications include a sampling rate of 133 kS/s, a maximum power dissipation of 800 mW in the SO package, and an operating temperature range from -40°C to +85°C.

ADCs/DACs - Special Purpose Feature Summary

• 8-Channel Multiplexer: Supports 8 single-ended or 4 differential inputs with software-configurable unipolar/bipolar modes.
• High-Speed Conversion: Achieves 133 kS/s sampling rate using internal clock or external serial clock up to 2 MHz.
• Low Power Consumption: Draws 1.5 mA in operating mode and reduces to under 10 µA in full power-down mode.
• Serial Interface: Direct connection to SPI, QSPI, and MICROWIRE devices without external logic; includes SSTRB output for DSP synchronization.

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 specific suffix 'CEWP+' corresponds to the SOIC-20 package and the -40°C to +85°C industrial temperature grade. Confirm RoHS compliance status as indicated by the '+' designation. Check current availability through authorized distributors, as stock levels may vary. Ensure the external reference voltage requirement is accounted for in the system design, as this variant lacks an internal reference.

ADCs/DACs - Special Purpose Selection Notes

Select the MAX188CEWP+ when an external precision reference is required rather than the internal 4.096V reference found in the MAX186 series. Choose this part over the MAX188AEWP+ if operation below 0°C is necessary, as the 'C' grade supports -40°C to +85°C while the 'A' grade is limited to 0°C to +70°C. Ensure the PCB layout accommodates the SOIC-20 package dimensions and thermal dissipation requirements for the specified power limits.

ADCs/DACs - Special Purpose Part Context

The MAX188CEWP+ belongs to the MAX186/MAX188 family of low-power, 8-channel, serial 12-bit ADCs. It shares the same core architecture and pinout as the MAX186 but differs in reference configuration. While the MAX186 includes an internal 4.096V reference, the MAX188 requires an external reference applied to the VREF pin. This family is designed for data-acquisition systems requiring high conversion speed and ultra-low power consumption.

ADCs/DACs - Special Purpose Replacement Considerations

The MAX188AEWP+ is a direct functional substitute within the same package but is rated for a commercial temperature range (0°C to +70°C). For extended temperature applications (-40°C to +85°C), the MAX188EWP+ is the appropriate alternative. Verify that any replacement maintains the external reference requirement and serial interface compatibility.