AD9250-250EBZ

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The AD9250-250EBZ is a very useful piece of equipment for those seeking a versatile and powerful Analog to Digital Converter (ADC.) It is one type of evaluation board that makes ADCs easier to use and design as well as providing a means to quickly evaluate the performance of an ADC. This board is from the AD9250 family which is specially designed for industrial applications.

The AD9250-250EBZ is a low-power, high-speed ADC with 8-bit resolution, up to 250Msps maximum conversion rate and low power dissipation of 90mW. It is equipped with a 1.5 V power supply, 8-bit parallel output and has an overall input sample rate of 250MSps. It is optimized for high-speed operation in signal processing, communications, embedded processors, high performance computing applications and more. The device features a maximum total harmonic distortion (THD) of -54dB and a maximum spurious-free dynamic range (SFDR) of 75dB.

The board is designed to support three types of input signals: single-tone, two-tone and sinusoidal signals. It also provides adjustable input range, oversampling ratio support, digital filter bypass, and complex digital filter bypass options. In addition, it supports wide temperature range operation and programmable input gain. Through its external clock synchronization inputs, the board is able to accommodate clocking from a wide variety of sources such as off-the-shelf oscillator modules and FPGAs.

The working principle of the AD9250-250EBZ is based on the successive approximation register (SAR) architecture. The SAR is used to determine the quantization range of the ADC. It divides an input range into a number of discrete levels and stores the digital codes corresponding to the analog inputs into a digital register. This process is repeated cyclically and the output of the device is a digital signal that is a representation of the analog input. The ADC requires two operations to complete: calibration and conversion. First the ADC is calibrated by setting the offset and gain parameters. The gain is applied to the analog input to achieve the desired accuracy. Then the conversion process begins which consists of the successive approximations of the voltage value, outputting a binary number for each sample.

In conclusion, the AD9250-250EBZ evaluation board provides a simple and reliable solution for those looking for an analog to digital converter that can process high-speed signals with accuracy and low power dissipation. The board features a wide range of features such as adjustable input range, oversampling ratio support, complex digital filter bypass, synchronization and more. Its SAR architecture allows it to convert analog signals to digital data quickly and accurately, making it ideal for industrial applications.

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