To minimize noise and ensure optimal performance, it is recommended to follow a star-grounding scheme, keep analog and digital grounds separate, and use a solid ground plane. Additionally, keep the analog input traces short and away from digital traces, and use a low-ESR capacitor for decoupling.
To optimize the analog input range, you can adjust the gain of the amplifier using the PGA (Programmable Gain Amplifier) feature. You can also use the VREF pin to set the reference voltage and adjust the input range accordingly. Additionally, consider using an external amplifier or attenuator if the input signal is outside the ADS805E's input range.
To handle overvoltage protection, use external voltage-limiting resistors or a voltage clamp circuit to limit the input voltage to within the ADS805E's absolute maximum ratings. You can also consider using a voltage supervisor or a reset IC to monitor the input voltage and reset the system if it exceeds the maximum rating.
To ensure accurate temperature measurement, calibrate the internal temperature sensor by measuring the temperature using an external thermometer and adjusting the offset and gain registers accordingly. Also, ensure that the device is in a thermally stable environment and avoid self-heating effects by minimizing power consumption.
To ensure proper operation, power up the ADS805E in the following sequence: VDD, AVDD, and then DVDD. When powering down, reverse the sequence: DVDD, AVDD, and then VDD. This ensures that the analog and digital circuits are properly initialized and shut down to prevent damage or malfunction.
ADS805E datasheet
by Texas Instruments
