Texas Instruments recommends a 4-layer PCB with a solid ground plane, and to keep the analog and digital signals separate. The ADC input pins should be routed close to the ADC, and the digital output pins should be routed away from the ADC. Additionally, decoupling capacitors should be placed close to the power pins.
Optimizing the ADC3442IRTQT's performance requires understanding the application's specific requirements. Factors to consider include the input signal frequency, amplitude, and impedance, as well as the desired SNR, THD, and SFDR. TI provides an ADC Performance Calculator tool to help optimize the ADC's performance for specific applications.
The recommended power-up sequence for the ADC3442IRTQT is to apply the analog power supply (AVDD) first, followed by the digital power supply (DVDD), and then the clock signal. This ensures that the ADC's internal biasing and reference circuits are properly initialized.
The ADC3442IRTQT's digital output data is provided in a 16-bit parallel format. The data can be captured using an FPGA, ASIC, or microcontroller. The data can be processed and formatted according to the system's requirements, such as converting the data to a floating-point format or applying digital filtering.
The ADC3442IRTQT's latency is approximately 10 clock cycles. This means that there is a delay between the time the ADC samples the input signal and when the digital output data is available. System designers should consider this latency when designing their system's timing and synchronization.
ADC3442IRTQT datasheet
by Texas Instruments
