Texas Instruments recommends a 4-layer PCB with a dedicated analog ground plane, and to keep the analog and digital signals separate. The input traces should be short and direct, and the reference voltage pin should be bypassed with a 10nF capacitor to reduce noise.
To ensure accuracy over the entire operating temperature range, it is recommended to calibrate the device at multiple temperatures, and to use a high-accuracy voltage reference. Additionally, the device should be operated within its specified temperature range, and the power supply should be stable and noise-free.
The recommended power-up sequence is to first apply the analog power supply (AVCC), followed by the digital power supply (DVCC), and then the clock signal. The power-down sequence should be reversed, with the clock signal turned off last.
The digital output data should be captured on the falling edge of the clock signal, and the data should be latched into a register or FIFO to prevent data loss or corruption. Additionally, the data should be processed and stored in a timely manner to prevent overflow or loss of data.
Common pitfalls to avoid include incorrect power-up sequencing, inadequate bypassing, and poor PCB layout. To troubleshoot issues, it is recommended to use a logic analyzer or oscilloscope to verify the digital output data, and to check the power supply and reference voltage for stability and accuracy.
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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.
