MAX196AEWI+

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The MAX196AEWI+ is a special purpose data acquisition type analog-to-digital converter (ADC/DAC) typically used for high-accuracy, low-voltage trim or precision monitoring of single channel signals in applications such as medical equipment. It features a highly accurate, low-power, low-voltage, 16-bit A/D converter, innovative zero-drift architecture, wide-range data acquisition, high-performance monitoring, low-voltage biphase conversion, wide-range voltage input, and flexible I/O options. It also offers excellent design flexibility, allowing engineers to choose the optimum ADC/DAC system to meet their application requirements.

Application field

The MAX196AEWI+ is typically used in a wide range of industrial and medical applications that require precise, low-voltage trim or precision monitoring of signals with 16-bit or better accuracy. These include highly precise applications, such as medical systems, analyzing environmental conditions, measuring temperature and humidity, or in the automotive, industrial, and aviation industries. The MAX196AEWI+ is also suitable for a variety of applications, including data logging, medical test and measurement, audio testing, and broadcasting equipment.

Working principle

The MAX196AEWI+ features innovative zero-drift architecture, low-voltage biphase conversion, and an on-chip reference cell to provide exceptional accuracy for its 16-bit A/D converter. It also offers high-performance monitoring, wide-range data acquisition, and flexible I/O options.

The device uses dual-slope conversion technique. During measurements, the input voltage is sampled twice: the first sample (V1) is formed when the integration capacitor is charged from 0V to VIN; then, the integration capacitor is discharged from VIN to 0V and the second sample (V2) is taken. The device is capable of measuring values up to 20.5V (GND – 0.5V) with a 16-bit accuracy.

The on-chip zero-drift A/D converter isolates the low-voltage internal reference from the input and uses a single, low-voltage charge pump to generate the internal voltage references. When monitoring, the device continuously compensates for the temperature and the supply voltage drifts thanks to the built-in zero-drift circuitry.

The device is also flexible in its I/O options. It offers an open-drain CMOS logic interface that is compatible with standard logic families and allows direct connection to a microcontroller, as well as a single-ended signal port designed to operate at 1.8V. Additionally, it supports a wide range of power supplies, from 1.8V to 5V and allows two adjustment ranges for the input voltage range.

The MAX196AEWI+ is, thus, a versatile and highly accurate ADC/DAC suited for many commercial and industrial applications that require precise and high-accuracy measurements.

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