EVAL-AD7678CBZ

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Analog-to-Digital Converters (ADCs) are key components in many modern electronics systems, converting the analog waveform of a signal into a digital signal for further processing. The EVAL-AD7678CBZ is a simple-to-use evaluation board designed to help users evaluate the performance of the AD7678 12-bit, 250 Msps analog-to-digital converter (ADC). This evaluation board provides an easy-to-use platform where the performance of the ADC can be assessed by providing input signals through the on-board connectors and displaying the converted digital signal through the on-Board DAC. It is also possible to control the board conveniently using external power supplies, digital controllers, and chassis ground.

Application Field

The EVAL-AD7678CBZ is designed for use in applications that require a relatively high data rate for digital signal processing. These applications include audio and video systems, imaging systems, data acquisition systems, and wideband communications systems. In particular, the EVAL-AD7678CBZ can be used as a precise signal processor for industrial control systems, digital photography, vehicle tracking systems, medical imaging and diagnostics, telecommunication systems, radar systems and automatic test equipment.

Working Principle

The EVAL-AD7678CBZ is typically powered by an external power supply either 10V or 3.3V. When the board is turned on, it automatically sets the appropriate voltage levels on the analog and digital inputs. To properly assess the performance of the ADC, the user should first connect a reference voltage source to the reference input and then connect the input signal source to the respective signal channels. The input signal source can be a dc signal, a ramp, a sine wave, or any other standard test signal. The EVAL-AD7678CBZ provides on-board connections for the reference and the signal inputs. Once the appropriate signals are connected, the user can adjust the gain, offset, and data rate of the ADC.

Upon setting the appropriate parameters, the user can then observe the output of the ADC from the DAC connected to the evaluation board. The dotted signal plot seen on the display is the analog version of the signal, while the solid plot seen is the digital version. By comparing the two signal plots it is possible to assess and test the performance of the ADC in terms of linearity, bandwidth, signal-to-noise ratio, and other related parameters.

Conclusion

The EVAL-AD7678CBZ provides a simple, comprehensive way to evaluate the performance of an AD7678 12-bit, 250 Msps analog-to-digital converter. This evaluation board allows for precise adjustment of gain, offset, and data rate for precise signal processing in various applications. The output of the ADC can be observed from the on-board DAC, enabling users to assess the performance of the ADC and make sure that it meets the requirements of the application. Furthermore, the EVAL-AD7678CBZ also facilitates the use of external power supplies, digital controllers, and chassis ground for added safety and convenience in operation.

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