ADS7835E/250G4

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Analog to Digital Converters (ADC) are types of data acquisition devices that are capable of reading analog signals and converting them into digital data, such as numerical or binary data. The ADS7835E/250G4 is an example of an ADC that uses sigma-delta conversion to translate analog signals into digital. This article will examine the application field and working principle of the ADS7835E/250G4.

Application Field

The ADS7835E/250G4 is designed for data conversion applications with low-frequency signals making it suitable for applications such as sound quality measurement, medical test equipment, power supply monitoring, and small home appliances The ADC offers excellent noise performance with a maximum noise of 1.2µV RMS at 10kHz and a maximum offset of 10mV

The unit has eighteen different modes that can be used to handle any type of input. This allows for a wide range of applications, such as video and audio systems, temperature monitoring, automotive electronics, and laboratory equipment. Additionally, the ADC features a power-on reset, allowing it to start up quickly in new applications.

Working Principle

The ADS7835E/250G4 uses a sigma-delta conversion method to read incoming analog signals and convert them to digital data. This conversion method takes advantage of high-speed sampling, nonlinear processing, and analog-to-digital conversion.

The first step in the conversion process is for the unit to sample the incoming signal at a high speed. The signals are then passed through a nonlinear filter and compared to a reference level. If the signal is above the reference, the output is switched on. If the signal is below the reference, the output is switched off.

The final step in the process is for the ADC to convert the digital data into a numerical output. This is done by comparing the digital data to a lookup table of values and then outputting the corresponding numerical values.

The ADS7835E/250G4 offers excellent accuracy, with a typical accuracy of 0.5% of the input signal. This accuracy is achieved by including a high-speed clocking mechanism, which ensures that the optimal sampling frequency is achieved.

Conclusion

The ADS7835E/250G4 is a high-performance ADC that is suitable for a wide range of applications including video and audio systems, temperature monitoring, automotive electronics, and laboratory equipment. Using a sigma-delta conversion method, the device is able to quickly and accurately read and convert incoming analog signals into digital data. The ADC also boasts excellent accuracy and noise performance and a power-on reset feature for quick startup.

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