The ADS1256IDBRG4 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 traces separate. Additionally, use short, direct traces for the analog inputs and avoid crossing digital and analog traces.
The ADS1256IDBRG4 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 capacitors.
To ensure proper operation, TI recommends powering up the ADS1256IDBRG4 in the following sequence: VDD, AVDD, and then DVDD. This sequence helps prevent latch-up and ensures that the internal voltage regulators are properly enabled.
The ADS1256IDBRG4'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 ADS1256IDBRG4 devices, TI recommends using a common clock source and synchronizing the devices using the SYNC pin. This ensures that all devices are sampling at the same time, which is critical in applications such as multi-channel data acquisition.
ADS1256IDBRG4 datasheet
by Texas Instruments
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