A good layout and routing practice is to keep the analog and digital grounds separate, use a solid ground plane, and keep the analog signal traces away from the digital signal traces. Also, use a low-ESR capacitor for the AVDD and DVDD pins, and keep the decoupling capacitors close to the pins.
The AD7981HFZ has an internal calibration circuit that calibrates the device during power-up. However, it's recommended to perform an external calibration by applying a known voltage to the input and adjusting the offset and gain to achieve optimal performance.
The recommended power-up sequence is to power up the AVDD pin first, followed by the DVDD pin. This ensures that the analog circuitry is powered up before the digital circuitry, preventing latch-up or damage.
When not using the serial interface, the SDO pin should be left unconnected or tied to a high-impedance state to prevent any unwanted signals from affecting the device's operation.
The AD7981HFZ can achieve a maximum sampling rate of 1 MSPS, but this may vary depending on the specific application and system design.
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Analog Devices Inc. is a global leader in the design and manufacturing of analog, mixed-signal, and digital signal processing integrated circuits and software solutions for the industrial, automotive, healthcare, communications industries. Analog Devices serves a diverse range of markets including industrial, automotive, healthcare, energy, aerospace, defense, and consumer electronics industries.
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