INA223EVM Hardware Overview

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3.6

INA223EVM Hardware

This section describes some of the hardware features present on the INA223EVM board.

3.6.1

JMP3: I

The JMP3 setting determines if the INA223 is powered from the SM-USB-DIG platform or an external

power supply. If JMP3 is set to the INT position, the V

generated from the SM-USB-DIG Platform. This voltage can be set to either 3.3 V or 5 V, depending on

how it is configured in the software.

When JMP3 is set to the EXT position, an external supply connected to terminal T1 must be used to

provide the digital supply voltage for the INA223.

3.6.2

JMP1 and JMP2: I

JMP1 and JMP2 are used to set the hardware setting for the A0 I

JMP2, the A0 address can be set to either a logic '1' or a logic '0'. Using JMP1, the A0 address can be set

to either the SCL or SDA communication line. Make sure to only have a jumper installed on JMP1 or

JMP2. Failure to keep these lines separate can lead to board shorts and problems with the I

communication lines. See the I2C Address Selection section for how to configure the INA223EVM

software to match the JMP1 and JMP2 hardware settings.

3.6.3

External I

The I

lines from the SM-USB-DIG Platform and terminal block T3. If external signals separate from the SM-USB-

DIG are to be used, simply disconnect the SM-USB-DIG from the INA223 board and connect to external

SDA, SCL, and GND lines. Also, remember to apply an external V

communication device being used.

CAUTION

Failure to disconnect the SM-USB-DIG Platform while using external I

communication

can

cause

damage

to

the

SM-USB-DIG

or

external

communication device.

10

INA223EVM User’s Guide and Software Tutorial

SBOU125 – June 2012

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