Datasheet

USBDIG
Platform
INA219
TestBoard
EVM
Power
Systemonwhichwewillmeasure
ShuntCurrent,BusVoltage,andPower
System
Power
Shunt
Resistor
System
Load
INA219
V Supply
Switched5.0VPower
DUT
Connectionto
ShuntVoltage
andGND
25-Pin
MaleDSUBSignals
FromUSBDIGPlatform
I C
2
Address
Jumpers
I C
Interface
2
System Setup www.ti.com
2 System Setup
Figure 2 shows the system setup for the INA219EVM. The PC runs software that communicates with the
USB DIG Platform. The USB DIG Platform generates the analog and digital signals used to communicate
with the INA219_Test_Board. Connectors on the INA219_Test_Board allow the user to connect to the
system under test whose power, current, and voltage will be monitored.
Figure 2. INA219EVM Hardware Setup
2.1 Theory of Operation for INA219_Test_Board Hardware
Figure 3 presents a block diagram of the INA219_Test_Board. The functionality of this PCB is relatively
simple. It provides connections to the I
2
C™ and general-purpose input/outputs (GPIO) on the USB DIG
Platform board. It also provides connection points for external connections of the shunt voltage, bus
voltage, and GND.
Figure 3. INA219_Test_Board Block Diagram
4
INA219 Evaluation Module SBOU074A–January 2009–Revised February 2010
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