ADS7818EB/2K5G4

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Data Acquisition is a process of collecting digital or analog data from devices with physical variables such as temperature, light, pressure and sound. Analog to Digital Converters (ADC) are devices that convert analog signals into digital ones, allowing the data to be read, processed, stored and output. One such example is the ADS7818EB/2K5G4, a low-power 12-bit ADC.

The ADS7818EB/2K5G4 is a low-power, general-purpose analog-to-digital conversion device that has two or four 8-channel multiplexers and 12-bit resolution. It features an onboard voltage reference, an I2C-compatible serial interface, a Synchronous Slave Serial Port (SSP), and a variety of functions such as programmable input range, automatic gain control and on-chip filter. The ADC is also available in three packages: SOIC16, TSSOP24, and VSSOP-28.

The application field and working principle of the ADS7818EB/2K5G4 vary based on the requirements of the system. For example, it can be used in data acquisition systems like process control and scientific instrumentation, where it can be used to acquire analog signals that are converted by the ADC and transmitted via the I2C interface to devices like a microcontroller or microcomputer, which then processes the data. The ADC can also be used in automotive applications such as anti-lock brakes and safety systems, where it converts analog control signals to digital, enabling better control and safety features.

The analog-to-digital conversion of the ADS7818EB/2K5G4 is done using a successive approximation register (SAR). The SAR is a string of bits, starting with one high bit and one low bit. It is then compared to the analog input signal and if the input is higher than the SAR, the next bit is set to 1. This continues until the analog input is approximately equal to the SAR. Once the SAR is settled, the analog input can be translated into a digital code, which is then transmitted via the I2C bus. Alternatively the ADC can be configured to use the Synchronous Slave Serial Port (SSP) to transmit the digital output.

The ADS7818EB/2K5G4 also features a low-power standby mode and a system shutdown mode, which can be used to reduce power consumption when the ADC is not in use. It also includes a temperature sensor and on-chip filter with selectable filter coefficients, allowing data acquisition at low frequencies. In addition, the ADC has programmable input range, gain control and flexible voltage measurement range.

The ADS7818EB/2K5G4 is a versatile low-power analog-to-digital converter, designed for use in a variety of applications. It features a 12-bit resolution, two or four 8-channel multiplexers, a temperature sensor and an I2C-compatible serial interface, as well as an SSP port and additional features that make it suitable for applications like process control, scientific instrumentation, automotive safety systems and data acquisition.

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