Connect the input pins to the
sensing resistor using a Kelvin or 4-wire connection. This connection technique
ensures 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.
The power-supply bypass capacitor
should be placed as closely as possible to the 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.