AD7980ARMZ

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Data Acquisition is the process of measuring, acquiring, and recording signals from physical environments. It involves a number of different technologies and techniques in order to capture data from different systems and ultimately represent it in a digital format. One such technology is Analog to Digital Converters (ADC), which allow analog signals to be converted into a digital format. The AD7980ARMZ is an example of a 12-bit, low-power ADC specifically designed for measuring voltage or current. In this article, we will discuss the application fields and working principle of the AD7980ARMZ.

Application Fields

The AD7980ARMZ is designed to measure voltage or current in industrial, automotive, consumer, and battery-powered applications. In industrial applications, it can be used for sensing and control of temperature, pressure, or other physical variables. In automotive applications, it is commonly used to monitor engine speed, torque, or fuel level. In consumer applications, it can be used in mobile phones, computers, and other mobile devices to monitor power management and battery condition. Finally, in battery-powered applications, it can measure battery voltage, charger State of Charge (SOC), and remaining battery capacity.

Working Principle

The AD7980ARMZ uses a three-step process to convert an analog input signal into a digital representation. The first step is to sample the input signal at discrete intervals. The sample rate is measured in samples per second (S/s). The second step is to hold the sample for a measurement window. The size of this window, measured in samples, will vary depending on the sample rate and the resolution of the converter. The third and final step is to convert the held sample into digital form. This is done using a 12-bit successive-aproximation ADC algorithm.

The ADC is powered by a 3.3V maximum supply voltage and has two external voltage reference pins for precise reference voltages, which can be adjusted for different applications. It also has an input multiplexer with two analog inputs (A1 and A2). The input multiplexer can be configured for single ended or differential input modes. The AD7980ARMZ also has an internal clock source that can be used to trigger conversions and a GPIO (General Purpose Input/Output) pin that can be used to control external circuitry.

In single-ended mode, the ADC converts each A1 sample into a 12-bit digital output code. In differential mode, it measures the difference between A1 and A2 and converts it into a 12-bit digital output code. The ADC contains an internal temperature sensor that can be used to correct temperature dependence of the converter. The temperature sensor is sampled periodically and compensated during the ADC conversion process.

The AD7980ARMZ has a selectable output mode that allows the user to choose between a Data Ready and a Data Start/Data Ready output. The Data Ready output will provide a digital signal when the conversion process is complete, while the Data Start/Data Ready output will provide a digital signal when the conversion process is started and again when it is complete.

The AD7980ARMZ is a low-power, 12-bit, analog-to-digital converter designed for use in a variety of industrial, automotive, consumer, and battery-powered applications. It has two external voltage reference pins for precise reference voltage, a GPIO pin for external circuitry control, an input multiplexer with two analog inputs, and an internal temperature sensor for compensation. It uses a three-step process to convert analog input signals into a digital representation, with a selectable output mode that can provide either Data Ready or Data Start/Data Ready signals.

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