Texas Instruments provides a layout and routing guide in the ADC3222IRGZT evaluation module user's guide (SLAU445). It recommends keeping the analog and digital grounds separate, using a solid ground plane, and minimizing the length of the analog input traces.
The ADC3222IRGZT requires a clock signal with a frequency range of 10 MHz to 50 MHz. The clock signal should be a low-jitter, high-frequency signal, and it's recommended to use a clock source with a jitter of less than 100 ps. The clock signal should be connected to the CLK pin, and the clock signal amplitude should be between 0.5 V and 1.5 V.
The recommended power-up sequence is to apply the analog power supply (AVDD) first, followed by the digital power supply (DVDD), and then the clock signal. For power-down mode, the device can be put into a low-power state by setting the PD pin high. In this state, the device consumes less power, but the analog inputs should be disconnected to prevent leakage currents.
The ADC3222IRGZT has an internal calibration circuit that can be enabled by setting the CAL pin high. The device can be calibrated using an external calibration voltage source or an internal calibration voltage source. The calibration options include offset calibration, gain calibration, and linearity calibration.
The recommended operating temperature range for the ADC3222IRGZT is -40°C to 125°C. Temperature affects the device's performance, including its offset voltage, gain error, and linearity. The device's performance is specified over the entire operating temperature range, and it's recommended to consider temperature effects when designing the system.
ADC3222IRGZT datasheet
by Texas Instruments
