9.2.2 Digital Interface

Figure 80 shows the digital connections to a controller, such as a field programmable gate array (FPGA) or microcontroller. Place the digital bypass capacitors on DVDD and the LDO output (BYPAS) close to the device pins and directly to the ground plane. Connections to the RESET andPWDN pins are optional. If not used, tie the inputs to DVDD. Avoid ringing on the digital inputs of the ADC. For long PCB traces, use 47-Ω series termination resistors to help reduce ringing by controlling the trace impedance. Place the resistors at the source (output driver).

Figure 80. Digital Connections