EVAL-AD7982SDZ

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Evaluation boards are a commonly used tool for testing and prototyping when working with analog-to-digital converters (ADCs). The EVAL-AD7982SDZ is an evaluation board specifically designed for testing the performance of Analog Devices’ AD7982, a high speed, low-power, 12-bit SAR ADC. This board provides users with a convenient and easy-to-use platform to evaluate the performance of the AD7982 in real-world applications.

Application Field

The EVAL-AD7982SDZ is primarily intended for use in consumer electronics, such as digital video recorders and digital audio equipment. It can also be used in medical imaging and instrumentation applications where precision data acquisition and low-power consumption are important. Additionally, the board can be used as an analog-to-digital bridge for microcontroller applications due to its 12-bit resolution.

Working Principle

The core of the EVAL-AD7982SDZ board is an Analog Devices AD7982 high speed, low-power, 12-bit SAR ADC. The AD7982 is an ultralow power device that offers an AC input bandwidth of 1 MHz and MHz and a maximum throughput rate of 1.6 MSPS (million samples per second). The board is designed to interface with the AD7982 through a standard 8-pin interface. It can be used with a separate voltage regulator to provide power to the device or it can be powered directly from the 5 V supply. Additionally, the EVAL-AD7982SDZ can be connected to an external processor via the provided 8-pin JTAG port.

The JTAG port is connected to the on-board digital signal processor (DSP). The on-board DSP implements the pipeline architecture required to efficiently interface the AD7982 with the external processor. The use of a DSP increases the performance of the AD7982 since data can be fetched from it faster than with a conventional ADC. Additionally, the DSP can be used to modulate and process the analog input signal before conversion.

The board also includes circuitry for interfacing with external analog signals by way of the on-board differential analog inputs. This allows the user to easily connect an analog source to the board for testing purposes. Additionally, the board includes both a USB connection and a 4-wire SPI interface, making it compatible with most modern systems. The board also features a number of adjustable delay lines, allowing the user to optimize the sampling frequency for their particular application.

Conclusion

The EVAL-AD7982SDZ is an evaluation board specifically designed for the Analog Devices AD7982 high speed, low-power, 12-bit SAR ADC. The board is intended for use in a variety of consumer and industrial applications including digital video, digital audio, medical imaging, and instrumentation. The EVAL-AD7982SDZ is equipped with an 8-pin JTAG port that connects to an on-board digital signal processor for efficient signal processing. Additionally, the board features a number of adjustable delay lines, making it an ideal choice for applications that require precise control of sample rate.

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