INDUSTRY 4.0 u ANALOG DEVICES
How high performance, robust ADCs are solving design challenges of modern industrial applications
Hakan Uenlue, senior field applications engineer, Analog Devices, explains how a new generation of multiplexed analogue-to-digital converters (ADCs) simplifies complex system design by offering higher channel counts, deeper signal chain integration, flexibility, and robustness to support modern automation and process controls in advanced factories and production plants.
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n modern production plants, a proper analogue front end (AFE) is paramount to enabling robust, precise, and accurate analogue-to-digital conversion. Due to variances across different systems and machines, typically, a programmable logic controller (PLC) can be used to control the many complex parameters. To achieve this task, and through analogue input modules, different sensors and signals are utilised. Many sensors like pressure, flow, temperature, and weight have analogue outputs representing
the measured quantities. Therefore, many precise and accurate analogue signal inputs are required to generate digital outputs. However, analogue-to-digital conversion is just one part of the task. The connectivity between nodes, sensors, analogue input modules, and PLCs takes place in the production plant, an environment that is notorious for electrical noise and other disturbance elements, like EMI. Thus, robust ADCs are critical for effectively operating in such harsh conditions.
NEW MULTIPLEXED ADCS OFFER HIGH INTEGRATION, HIGH PRECISION, HIGH FLEXIBILITY, AND BOBUSTNESS PLCs contain many analogue voltage inputs to monitor their system, meaning high number of channels.
High channel count can be achieved, for example, with an ADC that has eleven single- ended, or six differential inputs with buffers. The single-ended or differential nature of the inputs provides easy interfacing with different
Figure 1: The internal structure of a new-generation multiplexed ADC 16 March 2024 Irish Manufacturing
www.irish-manufacturing.com
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