A good PCB layout for the DDC112UK involves keeping the analog and digital grounds separate, using a solid ground plane, and placing the device close to the analog signal sources. Additionally, using a 4-layer PCB with a dedicated power plane and a dedicated ground plane can help reduce noise and improve performance.
To filter the output of the DDC112UK, a low-pass filter with a cutoff frequency below the Nyquist frequency (half the sampling rate) can be used. A simple RC filter or a more complex active filter can be designed depending on the specific application requirements.
The recommended power-up sequence for the DDC112UK is to first apply the analog power supply (AVDD), followed by the digital power supply (DVDD), and finally the clock signal. This ensures that the device powers up in a stable and controlled manner.
To optimize the clock signal for the DDC112UK, use a high-quality clock source with low jitter (<100 ps) and a frequency that is a multiple of the desired sampling rate. Additionally, use a clock buffer or a clock distribution network to ensure a clean and stable clock signal.
To synchronize multiple DDC112UK devices, use a common clock source and distribute it to each device. Additionally, use a synchronization signal (such as a frame sync) to ensure that all devices start converting at the same time.
DDC112UK datasheet
by Texas Instruments
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