MAX188DCAP+

ADCs/DACs - Special Purpose Overview

The MAX188DCAP+ is a low-power, 8-channel, serial 12-bit analog-to-digital converter (ADC) manufactured by 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 or dual ±5V supply, consuming 1.5mA in operating mode and under 10µA in power-down modes. Unlike the MAX186, this variant requires an external reference voltage applied to the VREF pin. It features a 4-wire serial interface compatible with SPI, QSPI, and MICROWIRE protocols, supporting sampling rates up to 133ksps.

ADCs/DACs - Special Purpose Feature Summary

• 12-bit resolution with 8 single-ended or 4 differential input channels
• Serial interface compatible with SPI, QSPI, MICROWIRE, and TMS320 DSPs
• Software-configurable unipolar/bipolar and single-ended/differential inputs
• Ultra-low power consumption: 1.5mA active, <10µA in shutdown

ADCs/DACs - Special Purpose Applications

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

ADCs/DACs - Special Purpose Procurement Notes

Verify that the specific ordering suffix 'DCAP+' corresponds to the correct temperature grade and package type for the target application. Confirm that the design includes an external voltage reference connected to the VREF pin, as this model lacks an internal reference unlike the MAX186 series. Ensure the serial clock polarity and phase settings match the required SPI/MICROWIRE standard.

ADCs/DACs - Special Purpose Selection Notes

Select the MAX188DCAP+ when an external precision reference is preferred or already available in the system architecture. This component is suitable for applications requiring software-selectable input ranges and multiple channel scanning. Verify that the source impedance of the analog inputs remains below 5kΩ to maintain specified acquisition times without additional buffering components.

ADCs/DACs - Special Purpose Part Context

This part belongs to the MAX186/MAX188 family of low-power data-acquisition systems. While electrically similar to the MAX186, the MAX188 distinguishes itself by omitting the internal 4.096V reference, necessitating an external reference source. The 'CAP+' suffix indicates a 20-pin SSOP shrink small-outline package with lead-free/RoHS-compliant construction.

ADCs/DACs - Special Purpose Replacement Considerations

The MAX186CCAP+ serves as a functional substitute if an internal reference is acceptable, though it contains an integrated 4.096V reference. Other MAX188 variants with different temperature grades or packages may be used if electrical parameters remain within specification.