10 Layout

10.1 Layout Guidelines

Figure 10-1 shows a layout recommendation with the critical placement of the decoupling capacitors. The same

component reference designators are used as in Section 9. Decoupling capacitors are placed as close as

possible to the AMC3301-Q1 supply pins. For best performance, place the shunt resistor close to the INP and

INN inputs of the AMC3301-Q1 and keep the layout of both connections symmetrical.

To avoid causing errors in the measurement by the input bias currents of the AMC3301-Q1, connect the high-

side ground pin (HGND) to the IIN-side of the shunt resistor. Use a separate trace in the layout to make this

connection to maintain equal currents in the IIN and INP traces.

10.2 Layout Example

R4

R2

AMC3301-Q1

Clearance area, to be

kept free of any

conductive materials.

To MCU I/O (optional)

GND

INP

INN

3.3-V or 5-V supply

HGND

VDD

DIAG

Top Metal

Inner or Bottom Layer Metal

Via

OUTP

OUTN

To analog filter / ADC / MCU

To analog filter / ADC / MCU

Figure 10-1. Recommended Layout of the AMC3301-Q1

AMC3301-Q1

SBASA73 – JULY 2020

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