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Texas Instruments INA223EVM User'S Manual And Software Tutorial Download Page 18

INA223EVM Software Overview

www.ti.com

5.2.3

Bus Voltage Gain

The Bus Voltage Gain field allows the user to select the gain that the bus voltage is multiplied by. It is
important to choose a value that places the output voltage within the linear output range of the device.
Failure to ensure that the outputs are within the linear range of the device can result in inaccurate results.

Figure 18. Configuring the Bus Voltage Gain

5.2.4

Current Shunt Voltage Gain

The Current Shunt Voltage Gain field is used to select the device shunt voltage gain setting. It is important
to choose a value that places the output voltage within the linear output range of the device. Failure to
ensure that the outputs are within the linear range of the device can result in inaccurate results.

Figure 19. Configuring the Current Shunt Voltage Gain

18

INA223EVM User’s Guide and Software Tutorial

SBOU125 – June 2012

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Copyright © 2012, Texas Instruments Incorporated

Summary of Contents for INA223EVM

Page 1: ...garding operating procedures and input output connections an electrical schematic printed circuit board PCB layout drawings and a parts list for the EVM Throughout this document the terms evaluation b...

Page 2: ...Install Window 12 12 Software License Agreement 13 13 Software Install Progress 13 14 INA223EVM Software Interface 14 15 Communication Error with SM USB DIG Platform 14 16 Setting the A0 Address 15 1...

Page 3: ...ile using this evaluation module 1 1 INA223EVM Kit Contents The INA223EVM kit includes the following items 1 INA223 PCB evaluation board 1 SM USB DIG Platform PCB 1 USB extender cable 1 SM USB DIG con...

Page 4: ...477 8924 or the Product Information Center at 972 644 5580 When ordering identify the document by both title and literature number Table 1 Related Documentation Document Literature Number INA223 Produ...

Page 5: ...SB DIG It should be noted that to issue commands to the INA223 chip the INA223EVM only uses H1 connnector pins 1 and 3 I2 C communication lines pin 6 VDUT and pin 8 GND Table 2 INA223EVM H1 Pin Connec...

Page 6: ...e details of its operation are included in a separate document SBOU098 The block diagram shown in Figure 4 is given as a brief overview of the SM USB DIG Platform Figure 4 SM USB DIG Platform Block Di...

Page 7: ...together gently slide the male and female ends of the 10 pin connectors together Make sure that the two connectors are completely pushed together loose connections may cause intermittent operation 3 3...

Page 8: ...of with Microsoft Windows operating systems Figure 6 Connecting the USB Cable to the SM USB DIG Platform In some cases the Windows Add Hardware Wizard is shown If this prompt appears allow the system...

Page 9: ...r example if JMP1 is connected do not connect JMP2 and vice versa Failure to properly connect jumpers can cause shorts or interruptions in the communication lines For more information on the INA223 ad...

Page 10: ...t 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 I2 C communi...

Page 11: ...limit the value for R3 and R4 to 10 or less Figure 9 shows the typical setup that is recommended for basic INA223 evaluation See the INA223 data sheet SBOS528 for more details Figure 9 Typical Filter...

Page 12: ...eb site To download the software to your system insert the disc into an available CD ROM drive Navigate to the drive contents and open the INA223EVM software folder Locate the compressed file INA223EV...

Page 13: ...that must be accepted as shown in Figure 12 Figure 12 Software License Agreement After accepting the Texas Instruments and National Instruments license agreements the progress bar opens and shows the...

Page 14: ...that appears if the computer cannot communicate with the EVM In the event you receive this error first ensure that the USB cable is properly connected on both ends This error can also occur if you con...

Page 15: ...SCL the INA223 can be changed to four different I2 C addresses as shown in Table 4 Table 4 INA223 I2 C Address Configuration A0 Address GND 1000000 VS 1000001 SDA 1000010 SCL 1000011 Figure 16 shows...

Page 16: ...ined with the VSHUNT measurement to calculate the power being supplied The Load Power option operates in a similar manner to the Supply Power option except that the VBUS measurement is taken internall...

Page 17: ...1 5 20 1 333 1 5 128 8 533 1 5 300 20 2 5 20 2 667 2 5 128 17 067 2 5 300 40 The remaining two configurations Bus Voltage and Shunt Voltage measure the bus voltages at the VIN pin and the shunt volta...

Page 18: ...igure 18 Configuring the Bus Voltage Gain 5 2 4 Current Shunt Voltage Gain The Current Shunt Voltage Gain field is used to select the device shunt voltage gain setting It is important to choose a valu...

Page 19: ...control of the part outside the general functionality of the graphical user interface GUI Most of this functionality is displayed in the Configuration Register however by selecting the appropriate re...

Page 20: ...er and Voltage Controls The software also includes an Auto Write feature as shown in the lower red box in Figure 21 Auto Write is enabled by default and automatically updates the register table whenev...

Page 21: ...in the Error field This calculator is used to help ensure that the physical output and settings are operating correctly The EVM and device digital communication interface are only designed to configu...

Page 22: ...1 10W 0603 SMD Stackpole Electronics RMCF0603ZT0R00CT ND RMCF0603ZT0R00 C2 CAP TANTALUM 4 7UF 35V 10 SM AVX Corp 478 1717 1 ND TAJC475K035RNJ C3 C4 CAP CER 10UF 25V X7R 10 0603 TDK Corp 445 1316 1 ND...

Page 23: ...6 7 8 6 www ti com INA223EVM Documentation 6 2 Schematic Figure 23 shows the schematic for the INA223EVM board Figure 23 INA223EVM Board Schematic 23 SBOU125 June 2012 INA223EVM User s Guide and Softw...

Page 24: ...yout Figure 24 shows the layout of the components for the INA223EVM PCB Figure 24 INA223EVM PCB Component Layout 24 INA223EVM User s Guide and Software Tutorial SBOU125 June 2012 Submit Documentation...

Page 25: ...oduct This notice contains important safety information about temperatures and voltages For additional information on TI s environmental and or safety programs please contact the TI application engine...

Page 26: ...or use in safety critical applications such as life support where a failure of the TI product would reasonably be expected to cause severe personal injury or death unless officers of the parties have...

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