Calibration Register =

0.00512

Current R

LSB SHUNT

Max Expected Current

£ Current

LSB

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INA230EVM Software Overview

5.2.4 Set Configuration Register

The Configuration Register must then be set correctly for the software to operate properly. There are two

methods used to set the Configuration Register: first, the user can manually calculate the desired value

and then input that value into the register table, as shown in Equation 1.Alternatively, the user can allow

the software to create a recommended window and choose an LSB for the current as shown in Figure 20.

Both methods accomplish the same goal by using Equation 1, but the method is selected by changing the

value in Step 4: Select Configuration Method (as Figure 19 and Figure 20 show).

(1)

The current LSB is calculated by a recommended range in the INA230 data sheet as shown in Equation 2.

It is important to note that with either of the methods used, the Current LSB and the Calibration Register

values are calculated based on the other variable and the R

SHUNT

value. See the section, Programming the

INA230 in the product data sheet for more information on setting the Calibration Register value.

(2)

Figure 19. Setting the Configuration Register Figure 20. Setting the Configuration Register (Current

(Calibration Register) LSB)

5.2.5 Configuring the Alert Pin

The Alert Pin from the INA230 allows the user to set limits that monitor the registers and trigger a flag

when they are exceeded. The register that is being monitored can be changed by selecting the desired

alert configuration as shown in Figure 21. The value that is being considered is compared to the Alert

Limit box. This Alert Limit box modifies its functionality based on the selected configuration. It is important

to note that by default, the INA230 Alert pin is set to active low.

Figure 21. Configuring the Alert Pin

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INA230EVM Software Overview

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In addition to the INA230EVM software alert configuration, the Alert Configuration box includes the

Conversion Ready button that allows for a special functionality on the Alert pin. When the INA230

completes the conversions for its current operation, it triggers the Alert pin and notifies the user that

another conversion can be performed. In most cases, the INA230 conversion ready flag is not visible

because of the speed of the INA230 conversion process.

5.3 Using the INA230EVM Software

After configuring the INA230EVM software, the rest of the tabs can be evaluated. This section describes

the basic operation of the device, and offers guidelines for interpreting the graphic user interface (GUI).

5.3.1 INA230 Bus Voltage, Shunt Voltage, Current, and Power Reading Bar

The bottom bar of the INA230 software, as shown in Figure 22, allows the user to constantly check the

status of the INA230 unit itself. These values are updated each time the Read All Reg button is pressed

at the top of the software. In addition to the register values stored in the part, the software also includes

flags for when the part is ready to trigger another conversion and when the Alert pin is triggered.

Figure 22. INA230 Results Bar

5.3.2 Calculation and Theory of Operation

The Calculation tab, as shown in Figure 23, allows the user to follow the software flow with basic

calculations performed from within the device. It is important to note that the calculations are performed

with the decimal values of the corresponding registers.

Figure 23. Theory of Operation Flowchart on the Calculation Tab

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5.3.3 Register Tab

The Register tab contains information on the individual operation of the INA230 registers. Each register

can be changed on a bit-by-bit basis to allow the user to have total control of the device beyond the

general functionality of the GUI alone. Most of this functionality is displayed in the Configuration register

tab, but by selecting the appropriate register and clicking on the Help With Reg button on the Register

tab, as shown in Figure 24, the user can diagnose the individual uses of each bit in each register.

Figure 24. Registers Tab

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Part #	881545-2
Description	SHUNT LP CONNECTOR ASSY 2POS
Category	Microcircuit
Availability	In Stock
Qty	270

881545-2

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