Texas Instruments provides a layout and routing guide in the ADC34J45IRGZR Evaluation Module User's Guide (SLAU445). It recommends using a 4-layer PCB with a solid ground plane, placing the ADC close to the analog signal sources, and using shielded cables for analog inputs. Additionally, it suggests using a common-mode filter and a low-pass filter to reduce noise.
The ADC34J45IRGZR has an internal voltage reference that can be enabled or disabled. To configure it, set the VREF_EN pin high to enable the internal reference or low to use an external reference. The internal reference voltage is 1.2V, and it's recommended to use a 10nF capacitor between the VREF pin and ground to filter noise.
The ADC34J45IRGZR has a maximum sampling rate of 250 MSPS. As the sampling rate increases, power consumption also increases. At 250 MSPS, the typical power consumption is around 1.3W. To reduce power consumption, consider using a lower sampling rate or enabling the power-down mode when not in use.
The ADC34J45IRGZR outputs 14-bit or 16-bit data, depending on the mode selected. The output data format can be configured as offset binary, two's complement, or unsigned binary. The word length can be set to 14-bit or 16-bit using the MODE pin. It's essential to ensure that the receiving device is configured to match the ADC's output data format and word length.
The ADC34J45IRGZR has a maximum junction temperature of 150°C. To ensure reliable operation, it's essential to provide adequate thermal management. This can be achieved by using a heat sink, ensuring good airflow, and keeping the device away from heat sources. Texas Instruments provides thermal design guidelines in the ADC34J45IRGZR datasheet.
ADC34J45IRGZR datasheet
by Texas Instruments
