Connect the input pins to the sensing resistor
using a Kelvin or 4-wire connection. This connection technique makes sure
that only the current-sensing resistor impedance is detected between the
input pins. Poor routing of the current-sensing resistor commonly results in
additional resistance present between the input pins. Given the very-low
ohmic value of the current resistor, any additional high-current carrying
impedance can cause significant measurement errors.
Place the power-supply bypass capacitor as close as possible to the device power supply and ground pins. The recommended value of this bypass capacitor is 0.1 µF. Additional decoupling capacitance can be added to compensate for noisy or high-impedance power supplies.
When routing the connections from the current sense resistor to the device, keep the trace lengths as close as possible to minimize any impedance mismatch.