The ADS1256IDBT 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 ADS1256IDBT has a built-in calibration feature, but you may need to optimize the gain and offset for your specific application. TI recommends using the ADS1256'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 ADS1256IDBT in the following sequence: AVDD, DVDD, and then CLKIN. This sequence helps prevent latch-up and ensures that the device powers up correctly.
The ADS1256IDBT'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 ADS1256IDBT devices, TI recommends using a common clock source and a synchronization signal. You can use the SYNC pin to synchronize the devices, and ensure that all devices are triggered simultaneously.
ADS1256IDBT datasheet
by Texas Instruments
