The ADS1255IDBR requires careful layout and routing to minimize noise and ensure accurate conversions. TI recommends using a 4-layer PCB with a solid ground plane, and keeping analog and digital signals separate. Additionally, use short, direct traces for the analog inputs and avoid crossing digital signals over the analog inputs.
The ADS1255IDBR has a built-in calibration feature, but you may need to optimize the gain and offset for your specific application. TI recommends using the ADS1255's internal calibration feature and then fine-tuning the gain and offset using external calibration resistors or a calibration DAC.
To ensure proper operation, TI recommends powering up the ADS1255IDBR in the following sequence: AVDD, DVDD, and then the analog input voltage. This sequence helps prevent latch-up and ensures that the internal voltage regulators are properly enabled.
The ADS1255IDBR's high-speed digital outputs require careful handling to prevent signal degradation and electromagnetic interference (EMI). TI recommends using a low-impedance transmission line, such as a 50-ohm microstrip, and terminating the lines with a 50-ohm resistor to prevent reflections.
To synchronize multiple ADS1255IDBR devices, TI recommends using a common clock source and a synchronization signal. You can use the ADS1255IDBR's SYNC pin to synchronize the conversions across multiple devices. Additionally, ensure that the devices are properly phased-locked to prevent skew between the devices.
ADS1255IDBR datasheet
by Texas Instruments
