AD7863BR-3

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Data Acquisition – Analog to Digital Converters (ADC) are essential components for any embedded system which has to acquire, process and save data related to the external environment. AD7863BR-3 is a low-power 8-bit single-channel Log-Dual successively approximate register (SAR) Analog to Digital Converter (ADC). This modern low-power and low-cost ADC can easily integrate into a variety of applications and can interface with popular microcontrollers.

Application Fields:

The AD7863BR-3 are ideal for battery powered, system-on-chip integrated circuits and a variety of industrial, embedded, and medical applications. The ADC features extended operating temperature and is suitable for general-purpose applications, such as parallel-bus microcontrollers, 16 and 32-bit microprocessor systems, PLCs, and PC-based data acquisition systems.

AD7863BR-3 provides resolution up to 8 bit and features high speed, low power dissipation, small package size, and improved accuracy. The ADC is suitable for various precision analog sensing applications such as temperature, pressure, force, torque, voltage, current and position.

AD7863BR-3 is an excellent choice for applications with limited bandwidth requirements such as medical/healthcare applications, especially in imaging systems. For example, AD7863BR-3 can be used to digitize signals from infrared cameras, ECG bands, vitreo fundus cameras, Electroencephalogram (EEG) forehead bands, and other medical imaging devices. Additionally, the ADC is a suitable choice for battery powered equipment such as RFID readers, handheld meters, portable GPS receivers, and other low-power devices.

Working Principle:

AD7863BR-3 is a single-channel higher than 8-bit SAR ADC featuring up to 12 bit accuracy. It works on the principle of successive approximation which is an iterative process used to convert analog signals into digital values. A voltage comparison circuit is used to compare a successive approximation register (SAR) output with the analog input being digitized. This process is repeated until the SAR output is close enough to the analog input.

At the beginning of each conversion cycle, the DAC output voltage is connected to the non-inverting input of a comparator. When the DAC output equals the input voltage, the comparator output goes high. From then on, the SAR algorithm is used to successively bring the DAC output and the comparator output closer on each subsequent step until they are equal. At the end of conversion, the digital values stored in the SAR are presented at the data output pins.

The AD7863BR-3 is designed to operate with the clock frequency of up to 50 kHz. This ensures that the average power consumption is minimized while offering a high speed conversion rate. The ADC also comes with a self-calibration feature which can automatically compensate any DC errors which may arise during the conversion process.

AD7863BR-3 also features a wide input voltage range, low voltage consumption, programmable power down resistance, and a variety of input and output voltage ranges. The ADC features extremely low level of clock-to-output delay with its built-in sample-and-hold amplifier and latency control.

In conclusion, AD7863BR-3 is a highly efficient, low-power, and low-cost ADC. It is an ideal choice for applications that require accuracy, portability, and high conversion rate. With its extended operational temperature range and self-calibration capability, AD7863BR-3 can be integrated into a variety of embedded, industrial, and medical systems.

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