Texas Instruments recommends a 4-layer PCB with a solid ground plane, and placing the ADS1192IRSMT close to the electrodes or sensors to minimize noise and interference. A dedicated analog ground plane is also recommended to separate analog and digital grounds.
Optimization involves selecting the right gain, sampling rate, and filter settings based on the application's requirements. TI provides a development kit and software tools to help with this process. Additionally, consulting the application notes and seeking support from TI's engineers can be helpful.
The clock input should be driven by a low-jitter, high-frequency clock source (e.g., a crystal oscillator or a clock generator). A clock frequency of 4.096 MHz or 2.048 MHz is recommended, and the clock signal should be routed close to the ADS1192IRSMT to minimize noise.
The ADS1192IRSMT requires a specific power-up and power-down sequence to ensure proper operation. The recommended sequence is to power up the analog supply (AVDD) first, followed by the digital supply (DVDD), and then the clock input. During power-down, the sequence should be reversed.
To ensure EMC, it's essential to follow proper PCB layout and design practices, such as separating analog and digital circuits, using shielding, and minimizing loop areas. Additionally, the ADS1192IRSMT's digital outputs should be properly terminated, and the device should be placed in a shielded enclosure if necessary.
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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.
