The datasheet provides general guidelines for layout and placement, but it's recommended to follow a star-grounding scheme, keep analog and digital grounds separate, and place the ADC close to the analog signal sources. Additionally, use a solid ground plane, avoid routing digital signals near analog signals, and use decoupling capacitors to minimize noise.
To optimize performance in high-temperature environments, ensure good thermal dissipation by using a heat sink or thermal pad, and follow the recommended operating temperature range. Also, consider using a temperature sensor to monitor the die temperature and adjust the ADC's clock frequency accordingly to minimize errors.
Use a low-pass filter with a cutoff frequency below the Nyquist frequency (half the sampling rate) to reduce noise and aliasing. A 2nd or 3rd order filter with a gentle roll-off is recommended. The filter should be placed as close to the ADC input as possible to minimize signal degradation.
Follow the calibration procedure outlined in the datasheet, which involves applying a known input voltage and adjusting the offset and gain trim bits to achieve optimal performance. It's also recommended to perform calibration at multiple temperatures and supply voltages to ensure optimal performance across the operating range.
Potential sources of error include noise, thermal drift, and non-linearity. These can be mitigated by using a low-noise power supply, minimizing thermal gradients, and using a high-quality reference voltage. Additionally, using a calibration routine and correcting for non-linearity can help minimize errors.
LTC2391IUK-16#PBF datasheet
by Linear Technology
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