R

SHUNT

Attenuator

Load

Two-Wire

Interface

GND

INA223

C

BYPASS

0.1 F

m

V (Supply Voltage)

S

Power Supply

(0V to 26V)

R

4.7k

PULLUP

W

V

IN-

V

IN+

V

OUT

SCL

SDA

A0

0

Resistors

W

Unpopulated C3

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INA223EVM Hardware Overview

3.6.4

V

The INA223EVM has an optional input filter located between the terminal block T2 and the INA223 input

pins. This filter helps to remove high-frequency noise from the V

this filter not used. C3 is typically unpopulated and R3 and R4 have 0-

Ω resistors installed. If filtering is

desired, limit the value for R3 and R4 to 10-

Ω or less. Figure 9 shows the typical setup that is

recommended for basic INA223 evaluation. See the INA223 data sheet (SBOS528) for more details.

Figure 9. Typical Filter Setup

3.6.5

Shunt Monitor Configuration and Terminal Block T2

The INA223 is typically used in a high-side configuration, as shown in Figure 10. The T2 terminal block

includes the connections for V

Depending on the user’s needs, either of these configurations may be used without any changes needed

to the INA223EVM board or software.

Figure 10. INA223 Shunt Configurations

11

SBOU125 – June 2012

INA223EVM User’s Guide and Software Tutorial

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