The ADS1253E requires careful layout and routing to minimize noise and ensure accurate conversions. TI recommends a 4-layer PCB with a solid ground plane, and to keep analog and digital signals separate. Additionally, use short, direct traces for the analog inputs and avoid crossing digital signals over the analog inputs.
To optimize the ADS1253E for low-noise applications, use a low-noise voltage reference, such as the REF5025, and ensure a stable power supply. Additionally, use a low-pass filter on the analog inputs, and consider using a shielded enclosure to reduce electromagnetic interference (EMI).
The recommended clock frequency for the ADS1253E is between 2 MHz and 4 MHz. However, the device can operate with clock frequencies up to 10 MHz. It's essential to ensure the clock frequency is stable and jitter-free to maintain accurate conversions.
The ADS1253E requires a one-time calibration process to ensure accurate conversions. This involves writing the calibration coefficients to the device's internal registers. TI provides a calibration routine in the ADS1253E's datasheet, and it's essential to follow this process carefully to ensure accurate conversions.
The ADS1253E's settling time is approximately 10 μs, which is the time required for the device to settle to a new input voltage. This settling time affects the device's throughput and should be considered when designing the system's timing and synchronization.
ADS1253E datasheet
by Texas Instruments
