AD693AQ

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The AD693AQ interface is an important sensor and detector interface. By using AD693AQ interface, various sensors and detectors can be connected to form a signal acquisition system. The AD693AQ interface has the following characteristics.

Application Field

The AD693AQ interface is a multi-channel signal acquisition interface, which integrates 5 coincidence channels to receive various linear voltage signals, such as infra-red detectors, capacitive type sensors, proportional type pressure transducers and microphones, etc. It is suitable for various industrial, agricultural and medical application ares, such as precision positioning and object recognition in industrial automation, automatic control in agriculture, and detection of physiological signals in medicine and health care. In addition, AD693AQ can also be used in data acquisition systems, process control, temperature and flow control, automotive security, and other applications.

Working principle

The AD693AQ interface can convert linear voltage signals of various sensors and detectors into digital signals. The core circuit of the AD693AQ consists of a reference voltage regulator, a low power and low noise operational amplifier, an operational comparator and an on-chip analog switch. When the voltage signal of the sensor or detector is within a certain range, the voltage level comparator turns on and the analog switch is connected to the ADC. The ADC can convert the analog data into a digital signal and output it to the data acquisition board.

The working principle of the AD693AQ is as follows. When a voltage signal enters the AD693AQ, the reference voltage regulator works first to ensure that the voltage signal is within the predetermined range. For this purpose, the reference voltage regulator adjusts the reference voltage to limit the input voltage of the operational amplifier and provides a stable voltage range for the operational amplifier. At the same time, the operational amplifier amplifies the linear voltage signal and sends it to the operational comparator. The operational comparator compares the input voltage signal with the reference voltage and then passes it to the analog switch. After the analog switch is connected, the voltage signal enters the ADC to be converted into a digital signal and is output to the data acquisition board.

In conclusion, the AD693AQ is a multi-channel signal acquisition module designed to transfer linear voltage signals of various sensors and detectors into digital data for further data processing. It is widely used in industrial automation, agriculture and healthcare, and other applications.

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