INA220 Software Overview
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3.7
Connecting External Power to the INA220EVM
The INA220 power supply (V
S
) operates over the range of 3V to 5.5V (see the
). The default jumper position provides 5V to the INA220 from the USB-DIG-Platform. The power
from the USB-DIG-Platform can be changed to 3V using JUMP9.
Another option is to connect power to the INA220 power supply (V
S
) using an external power supply. In
this case, connect power to the T3 terminal block and set JMP1 to the Vs_EXT positon. The INA220
power supply (V
S
) operates over the range of 3V to 5.5V, so be careful to not exceed this range.
3.8
Connecting External Signals to the INA220EVM
The INA220 shunt and bus voltages are applied via terminal block T4. The T4 terminal block is a direct
connection to V
IN+
and V
IN–
of the INA220. The bus voltage is monitored on V
BUS
(26V max). The shunt
voltage is the difference between V
IN–
and V
IN+
(320mV max). Refer to the
for more
details
4
INA220 Software Overview
This section discusses how to install and use the INA220 software.
14
INA220 Evaluation Module
SBOU079A – July 2009 – Revised February 2010
Copyright © 2009–2010, Texas Instruments Incorporated
