Texas Instruments provides a layout guide in the datasheet, but it's recommended to follow a star-grounding approach, keeping analog and digital grounds separate, and placing the device close to the analog signal sources. Additionally, ensure that the device is placed on a solid ground plane to minimize noise and electromagnetic interference (EMI).
To handle the high impedance of the analog inputs, use a buffer amplifier or an op-amp with a high input impedance (>10 GΩ) to drive the input signal. This will help to minimize signal attenuation and ensure accurate measurements. Additionally, keep the input traces short and use a low-noise, low-capacitance PCB material to minimize signal degradation.
Use a combination of passive and active filtering techniques to filter out noise and interference. For example, use a low-pass filter (LPF) or a band-pass filter (BPF) to remove high-frequency noise, and an electromagnetic interference (EMI) filter to remove electromagnetic noise. Additionally, use shielding and grounding techniques to minimize radiated noise.
To ensure accurate temperature measurement, ensure that the device is properly calibrated, and the internal temperature sensor is not affected by self-heating or external thermal gradients. Use a thermocouple or a thermistor to calibrate the internal temperature sensor, and ensure that the device is operated within its specified temperature range.
The recommended power-up sequence is to first apply the analog power supply (AVDD), followed by the digital power supply (DVDD), and then the clock signal. This ensures that the device powers up correctly and minimizes the risk of latch-up or other power-up related issues.
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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.
