Figure 8-6 shows a layout recommendation with the critical placement of the decoupling capacitors (as close as possible to the AMC1400 supply pins) and placement of the other components required by the device. For best performance, place the shunt resistor close to the INP and INN inputs of the AMC1400 and keep the layout of both connections symmetrical.

The ground pin (GND1) of the AMC1400 is connected to the same end of the shunt resistor that is connected to the negative input pin (INN) of the AMC1400. If a four-pin shunt is used, the input pins (INN and INP) of the AMC1400 are connected to the inner leads, and the GND1 pin is connected to the outer lead on the INN-side of the shunt resistor. To minimize offset and improve accuracy, route the ground connection as a separate trace that connects directly to the shunt resistor rather than shorting GND1 to INN directly at the input to the device.