AD7731BRZ-REEL

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Data acquisition is the process of measuring the physical properties of a system, converting them into digital values and analyzing the values for further processing. Analog to digital converters (ADC) are the components that carry out the conversion. The AD7731BRZ-REEL is used as an ADC in many consumer, commercial and industrial applications. This article will discuss the application field of the AD7731BRZ-REEL and its working principle.

Applications of AD7731BRZ-REEL

The AD7731BRZ-REEL is a low power, precision, low noise, wide input range, 18-bits ADC with a sampling frequency of up to 16 MHz. This makes it suitable for a variety of applications including medical imaging, digital barometry and industrial process control. For medical imaging, the wide sampling range and high accuracy of the AD7731BRZ-REEL make it ideal for applications such as ECG, pulse oximetry and oximetry. Its multi-stage gain conversion feature ensures a high dynamic range in digital barometry applications.

The AD7731BRZ-REEL is also used for industrial process control applications. Its accuracy and latency response time make it ideal for applications such as motor speed sensing, motor control, temperature control and pressure measurement. The ADC is also suitable for wireless video monitoring applications such as wireless video surveillance, wireless video doorbells, wireless video conferences and wireless video streaming. It is also used in embedded systems such as smart switches, embedded computers, controllers, microcontrollers and sensor interfaces.

Working Principle of AD7731BRZ-REEL

The AD7731BRZ-REEL is based on a two-stage switched capacitor architecture. It includes a low noise programmable gain amplifier (PGA), four-channel multiplexer and four level cascaded ADC. The ADC section is based on a successive approximation register (SAR) principle. The multiplexer is used to select between the four input channels. The gain factor can be programmed using the PGA. The PGA has a gain range of 1 to 32 and a power dissipation of only 40 µA.

The ADC has an 18-bit resolution with a noise floor of −110 dBFS at 16 MHz sampling rate. The maximum clock frequency is 16 MHz. The signal is converted from analog to digital by sampling the input signals and setting the gain factor using the PGA. The multiplexer then switches between the input channels. The signal is then filtered and amplified before being applied to the cascaded ADC. The ADC then samples the input signal and converts it to digital output code.

The AD7731BRZ-REEL also features a temperature sensor built into the chip. This allows the ADC to monitor the ambient temperature and adjust the gain factor settings accordingly. The output code is then sent to the microcontroller where it is processed and displayed. The ADC also supports an I2C interface, which allows it to be integrated easily into a larger system.

Conclusion

The AD7731BRZ-REEL is a low power, precision, low noise, wide input range, 18-bits ADC with a sampling frequency of up to 16 MHz. This makes it suitable for a variety of applications including medical imaging, digital barometry and industrial process control. It is based on a two-stage switched capacitor architecture that includes a low noise programmable gain amplifier (PGA), four-channel multiplexer and four level cascaded ADC. The ADC has an 18-bit resolution with a noise floor of −110 dBFS at 16 MHz sampling rate. It supports an I2C interface, which allows it to be integrated easily into a larger system.

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