10 Layout

10.1 Layout Guidelines

Figure 10-1 shows a layout recommendation with the critical placement of the decoupling capacitors (as close as

possible to the AMC3302-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 AMC3302-Q1 and keep the

layout of both connections symmetrical.

To avoid errors in the measurement caused by the input bias currents of the AMC3302-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

AMC3302-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

C3

C2

C1

C5

C6

FB2

FB1

FB3

Figure 10-1. Recommended Layout of the AMC3302-Q1

AMC3302-Q1

SBASA84A – FEBRUARY 2021 – REVISED JULY 2021

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