EVAL-AD7961FMCZ

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The EVAL-AD7961FMCZ is an Evaluation Board/Kit for the 16-bit, 8-channel, 125 MSPS ADC with internal reference from Analog Devices. It is an analog-to-digital converter (ADC) that is specifically designed for data acquisition, high-speed sampling of analog waveforms, and data conversion in a variety of industrial and embedded applications. This evaluation board includes a variety of features and components to enable testing and debug of the AD7961 device, including an on-board SERDES FMC connector, an on-board voltage source, and an on-board serializer.

The EVAL-AD7961FMCZ operates on a supply voltage of 3.3V and is offered in a 14x14mm, 160-ball BGA package. The board also includes active output protection, differential composite/AC-coupled input, reference buffers, and a flexible digital control interface. This Evaluation board has two input and four output buses, as well as programmable LVDS interfaces and SPI serial interface. The board also supports data clock speeds up to 125 MSPS per channel, reducing overall power consumption for the system.

Working Principle

The EVAL-AD7961FMCZ evaluation board utilizes a differential input architecture with four input buses to sample the analog waveform and convert the analog signal to a digital form. The ADC features a 16-bit SAR architecture that minimizes the differential nonlinearity (DNL) error and also allows for a maximum input dynamic range of 4V differential when driven with the full power supply. The input buses employ a 4-to-3 multiplexer to route inputs to the sample-and-hold amplifiers (SHAs).

The SHAs hold the voltage of the inputs for the duration of the sample period while the ADC converts the input signal into a digital representation. The AD7961 ADC then employs a pipeline architecture that samples the analog signal, converts it to a digital stream, and passes it along the internal serial data bus. The digital streams are then clocked out from the ADC through the serializer to the SERDES FMC connector. The FMC connector can then output the digital signals to external systems for further evaluation.

Applications

The EVAL-AD7961FMCZ is designed for applications requiring a wide dynamic range and high resolution. These include medical imaging, data acquisition, high-speed signal processing, and many other industrial and embedded applications. The ADC is capable of sampling across the entire voltage range, and it can also accommodate a variety of input configurations, from single-ended to differential. The onboard serializer also allows for the digital samples to be sent to an external system via the SERDES FMC connector.

The EVAL-AD7961FMCZ evaluation board is a valuable tool for evaluating Analog Devices’ AD7961 ADC. It is a flexible and accurate platform for testing the performance and capabilities of the ADC, as well as for prototyping applications and providing detailed performance information for the AD7961 device.

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