Figure 8-6 shows a layout recommendation with the critical placement of the decoupling capacitors (as close as possible to the AMC1400-Q1 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-Q1 and keep the layout of both connections symmetrical.

The ground pin (GND1) of the AMC1400-Q1 is connected to the same end of the shunt resistor that is connected to the negative input pin (INN) of the AMC1400-Q1. If a four-pin shunt is used, the input pins (INN and INP) of the AMC1400-Q1 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.