Texas Instruments recommends a star-ground configuration for the analog and digital grounds, with the analog ground connected to the digital ground at a single point. The device should be placed close to the analog signal sources, and the PCB layout should be designed to minimize noise and electromagnetic interference (EMI).
To optimize performance in high-temperature environments, ensure good thermal conductivity between the device and the PCB, use a heat sink if necessary, and consider reducing the power supply voltage to minimize self-heating. Additionally, ensure that the device is operated within its specified temperature range and that the PCB is designed to minimize thermal gradients.
The recommended power-up sequence is to first apply the analog power supply (VCC) and then the digital power supply (VDD). The digital power supply should be applied after the analog power supply has reached its nominal value. This sequence helps to prevent latch-up and ensures proper device operation.
The output voltage swing of the LMP7731MAX/NOPB can be adjusted by selecting the appropriate gain resistor values. The output voltage swing should be limited to ensure that it does not exceed the supply voltage or go below ground. Additionally, the output should be buffered with an op-amp or a voltage follower if it needs to drive a heavy load.
Texas Instruments recommends using a combination of series resistors and capacitors to filter out high-frequency noise and EMI. A 10-ohm series resistor and a 10-nF capacitor can be used on each supply pin to filter out high-frequency noise. Additionally, a 10-uF capacitor can be used to decouple the power supply.
LMP7731MAX/NOPB datasheet
by Texas Instruments
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