Texas Instruments provides a layout and routing guide in the DAC3161 application note (SLAA443) that recommends a star-ground configuration, separate analog and digital grounds, and careful routing of sensitive signals to minimize noise and ensure optimal performance.
You can use an external voltage divider or an op-amp based attenuator circuit to scale down the DAC output voltage to match the input range of your ADC. Alternatively, you can use an ADC with a wider input range or consider using a different DAC with a lower output voltage range.
A low-pass filter with a cutoff frequency above the Nyquist frequency of the DAC's output data rate can be used to reduce noise and improve signal quality. A simple RC filter or a more complex active filter can be designed depending on the specific requirements. Texas Instruments also provides filter design guidelines in the DAC3161 application note (SLAA443).
The DAC3161IRGCT has a SYNC pin that can be used to synchronize multiple devices. By connecting the SYNC pins of multiple devices together and driving them with a common clock signal, you can ensure simultaneous updates. Additionally, you can use a single clock source to drive the DAC's clock input (CLK) to ensure synchronized operation.
The maximum clock frequency for the DAC3161IRGCT is 40 MHz. However, the actual clock frequency used may be limited by the specific application and the quality of the clock signal. It's recommended to consult the datasheet and application notes for more information on clock frequency limitations and requirements.
DAC3161IRGCT datasheet
by Texas Instruments
