Supply Bypass

Capacitor

Via to Power or Ground Plane

Via to Internal Layer

Supply Voltage

Shunt Resistor

Output Signal

VS

OUT

CMP

IN

GND

RESET

CMP

OUT

VIN-

VIN+

R1

R2

RPULL-UP

RESET

25

INA200, INA201, INA202

www.ti.com

SBOS374E – NOVEMBER 2006 – REVISED SEPTEMBER 2017

Product Folder Links: INA200 INA201 INA202

Submit Documentation Feedback

Copyright © 2006–2017, Texas Instruments Incorporated

10 Layout

10.1 Layout Guidelines

•

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 causes

significant measurement errors.

•

The power-supply bypass capacitor must be placed as close 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.

10.2 Layout Example

Figure 39. INA20x Layout Example