CDA EVM9 Guia do Utilizador descarregar pdf (Página 4)

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

Address

Jumpers

I C

Interface

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

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

INA219 Evaluation Module SBOU074A–January 2009–Revised February 2010

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