ADS7890IPFBR

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Data acquisition is an essential element of any control system. It enables the control system to gain an understanding of the physical environment by using a variety of sensors and logical data converters. Analog to Digital Converters (ADC) are used to convert analog signals and readings into a digital format for further processing by a computer or microcontroller. One such product is the ADS7890IPFBR from Texas Instruments, which is designed for high-accuracy, low-power and space-saving applications.

The ADS7890IPFBR is a 12-bit, single-channel Analog to Digital Converter (ADC) with a built-in track-and-hold amplifier and reference. It is capable of converting analog input signals with a resolution of 10.5 effective bits and a sample rate of 80MHz. It features low power consumption, high-input impedance, and a direct digital output that is easily interfaced to digital signal processors and microcontrollers. The device also includes an internal clock source with an adjustable output frequency that can be synchronized to an external clock source.

The ADS7890IPFBR is capable of measuring a wide range of signal levels. Its input range is ±0.25 to ±10V with a 12-bit resolution, or from -40mV to +40mV with a 10-bit resolution. The built-in track-and-hold amplifier allows for the simultaneous measurement of multiple input signals or integrating analog signals over extended periods of time. The device is also designed for use in low-power and space-sensitive applications, consuming only of 65mW at 3.3V, operating over a temperature range of -40 to 85C and packs all of these features into a small form factor package.

Inside the device, there are three main sections: The A/D Converter, the Track-and-Hold Amplifier, and the Reference circuit. The A/D Converter is the heart of the device, allowing for the conversion of an analog signal into a digital format. It consists of a voltage divider and a pair of comparators that compare the input voltage to two reference voltages. The output of the comparison is used to determine the digital output code of the converter. The track-and-hold amplifier is used to track changing analog signals and hold them while they are being digitized. It consists of a buffer amplifier, an integration amplifier, and a sample-and-hold circuit. Lastly, the reference circuit provides the device with a low temperature coefficient, low drift voltage reference source that is required for accurate and stable conversion.

Overall, the ADS7890IPFBR is a powerful and versatile product, that provides accurate and reliable conversion of analog signals into digital data. Its small form factor and low power consumption makes it ideal for use in mobile and space-limited applications, where high accuracy and reliable data acquisition is required. The ADS7890IPFBR is a valuable tool for application fields such as automotive, industrial process control, medical, military, and any area that requires efficient and accurate data acquisition.

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