Texas Instruments recommends a 4-layer PCB with a solid ground plane, and to keep the analog and digital signals separate. The input and output traces should be as short as possible and shielded from digital signals. A dedicated analog ground plane is also recommended.
To minimize EMI, use a low-inductance path for the digital outputs, keep the output traces short, and use a series termination resistor (e.g., 22-33 ohms) at the output pins. Additionally, consider using a shielded cable or a twisted pair for the digital output signals.
The recommended power-up sequence is to apply the analog power supply (AVDD) first, followed by the digital power supply (DVDD), and then the clock signal. This sequence helps to prevent latch-up and ensures proper device operation.
To optimize performance in a noisy environment, use a low-pass filter at the input pins, and consider using a shielded enclosure or a metal can package for the device. Additionally, use a high-quality power supply with low noise and ripple, and consider using a ferrite bead or a common-mode choke to filter out high-frequency noise.
The maximum clock frequency for the ADS822E/1K is 20 MHz. However, the device can operate at higher clock frequencies with reduced performance. It's recommended to consult the datasheet and application notes for more information on clock frequency and performance trade-offs.
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ADS822E/1K Overview
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About Texas Instruments
Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.
