WM8214SCDS/V

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Data acquisition from an analog source is the process of capturing voltage or current signals from a physical environment, converting them into digital signals, and transferring them to a computer for further processing and analysis. Analog Front End (AFE) is integral for data acquisition, providing amplification, filter and gain control functions, as well as analog-to-digital conversion of the input signal. The WM8214SCDS/V is a dual-channel, integrated AFE chip with 24-bits resolution which offers a variety of features to suit different data acquisition applications.

Key Features

The WM8214SCDS/V combines signal processing functions with analog signal conversion to deliver a wide range of analog input signals with precision, speed, and accuracy. Its key features include:

• Dual-channel 24-bit resolution with a low power consumption of only 200 mW.
• Integrated signal conditioning for programmable antialias filtering, gain control, and signal amplification.
• High-speed conversion rate of up to 50 kHz per channel.
• On-board reference clock of up to 300 MHz for reliable data acquisition performance.
• Integrated output buffer for driving ADC outputs.

Application Fields

The amplitude and frequency range accepted by the WM8214SCDS/V makes it an ideal choice for diverse data acquisition applications. Some of the major application fields include:

• Industrial automation and process control systems.
• Medical instruments and devices.
• High-speed data acquisition.
• Machine vision systems and image processing.
• Wireless communication systems.
• Power system monitoring.
• Avionics.
• Automobile testing.

Working Principle

The WM8214SCDS/V chip operates by converting the input voltage signal into a digital output. It does so by amplifying the input signal, filtering it to remove unwanted noise, and then converting it into a digital signal which can be processed by a computer. This is achieved by processing the signal in several stages.

• The first stage is the antialias filtering where low-frequency residuals are removed from the input signal.
• The second stage is the gain control where gain is adjusted to compensate for signal loss in the pre-amplification stage.
• The third stage is the pre-amplification stage where the signal is amplified to optimal levels suitable for analog-to-digital conversion.
• The fourth stage is the differential ADC stage where the signal is converted into a digital signal.
• The fifth stage is the output buffer stage where the digitally converted signal is sent to the output.

The different stages are then synced with a reference clock, read out at a predetermined rate, and the resulting digital signal is then stored for further processing.

Conclusion

The WM8214SCDS/V chip is an integrated, dual-channel AFE designed for high-speed, resolution-critical data acquisition applications. Its low power consumption and integrated signal conditioning make it an ideal choice for various scenarios and applications.

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