MAX139CMH+D

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Data Acquisition - ADCs/DACs - Special Purpose

The MAX139CMH+D is a special purpose, Analogue-to-Digital Converter (ADC) capable of digitally sampling frequencies as high as 2MHz. This makes it well suited for a variety of applications which require the capture and subsequent processing of analogue signals within different frequency bands for the purpose of data acquisition or signal conditioning.

The MAX139CMH+D performs analogue-to-digital conversions with a fixed 12-bit resolution. It is an eight-channel unit, and features a single conversion rate that operates at a maximum frequency of 1.1MHz. It also offers on-chip reference voltage selection, as well as a full-scale input offset adjustment option.

The ADC utilizes a single-ended analog input architecture with a three-state converter. The input architecture uses an internal feedback element with an amplifier. At the front end, a combination of filter and attenuation stages enables the measurement of voltage signals with a maximum dynamic range of ±10V. The ADC also features an integrated output amplifier, providing a rail-to-rail input range.

The MAX139CMH+D has many potential applications in areas such as industrial automation, medical and consumer electronics, laboratory instrumentation and other areas of data acquisition and signal conditioning. The device is well suited for applications that require the conversion of analog signals between 0 and 10V into digital signals.

In terms of working principle, the analog input signal is sampled and held, and then compared against a ramp signal. The analog signal is then clocked into a register, where it is digitized and stored as a set of binary numbers. The device then completes the conversion by resetting the ramp generator and waiting for the next analog signal. The ADC then calculates the average of its results to form a single 12-bit data word.

The MAX139CMH+D is a unique and versatile device that is capable of producing accurate digital representations of analog signals. It is ideal for applications that require precise signal conditioning and data acquisition, such as real-time process monitoring, analogue signal processing, signal averaging, signal filtering and frequency measurement.

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