Texas Instruments recommends a 4-layer PCB with a solid ground plane, and to keep analog and digital traces separate. Additionally, use a low-ESR capacitor for the AVDD pin and a 0.1uF capacitor for the REF pin.
Optimize the ADC's performance by selecting the correct clock frequency, setting the correct gain and offset, and using the correct input range. Additionally, consider using the ADC's built-in calibration feature and adjusting the sampling rate to suit your application.
The recommended power-up sequence is to power up the AVDD pin first, followed by the DVDD pin, and then the digital interface (e.g. SPI or I2C). This ensures that the analog circuitry is powered up before the digital interface.
The ADS7862Y/250 has a pipelined architecture, which means that there is a latency of 2-3 clock cycles between the start of conversion and the availability of the result. To handle this, consider using a double-buffered approach or implementing a FIFO to store the converted data.
To mitigate EMI and RFI, use a shielded enclosure, keep the ADC and its connections away from high-frequency sources, and use a common-mode choke or ferrite bead on the analog input lines. Additionally, consider using a low-pass filter on the analog input signals.
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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.
