MAX188BCWP

ADCs/DACs - Special Purpose Overview

The MAX188BCWP is a 12-bit, 8-channel analog-to-digital converter (ADC) from Maxim Integrated. It integrates an 8-channel multiplexer, high-bandwidth track/hold circuit, and serial interface. The device operates on a single +5V or dual ±5V supply and supports software-configurable unipolar/bipolar and single-ended/differential inputs. It utilizes successive-approximation conversion with a sampling rate of 133ksps. Unlike the MAX186, the MAX188 requires an external reference voltage applied to the VREF pin. It features a 4-wire serial interface compatible with SPI, QSPI, and Microwire protocols.

ADCs/DACs - Special Purpose Feature Summary

• 12-bit resolution with 8 single-ended or 4 differential analog input channels
• 133ksps sampling rate using internal track/hold circuitry
• Requires external reference voltage at VREF pin
• Low power consumption: 1.5mA operating, 2µA power-down

ADCs/DACs - Special Purpose Applications

• Portable data logging systems
• High-accuracy process control instrumentation
• Battery-powered medical instruments

ADCs/DACs - Special Purpose Procurement Notes

Verify the 'B' grade designation for specific accuracy parameters such as gain error and offset error limits. Confirm the 'C' temperature range covers the intended operational environment. Ensure the 'WP' suffix corresponds to the required 20-pin SO package type. Check RoHS compliance status based on the ordering suffix.

ADCs/DACs - Special Purpose Selection Notes

Select the MAX188 over the MAX186 when an external precision reference is preferred or required for system calibration. Verify that the external reference voltage matches the desired full-scale input range. Ensure the serial interface timing meets the microprocessor's clock requirements for either internal or external clock modes.

ADCs/DACs - Special Purpose Part Context

The MAX188 is part of the MAX186/MAX188 family of low-power, serial 12-bit ADCs. It shares the same architecture and pinout as the MAX186 but differs in reference configuration. The MAX186 includes an internal 4.096V reference, while the MAX188 relies on an external source. Both devices offer similar performance metrics regarding speed and power consumption.

ADCs/DACs - Special Purpose Replacement Considerations

The MAX186 serves as a functional alternative if an internal reference is acceptable. Other members of the MAX18x family may be considered for parallel interface requirements.