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INA234 Datasheet(PDF) 21 Page - Texas Instruments |
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INA234 Datasheet(HTML) 21 Page - Texas Instruments |
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21 / 45 page  5. Add '1' to the complement to create the two's complement result = 1000 0011 0000 0000 = 8300h If averaging is enabled, this register displays the averaged value. Table 7-5. Shunt Voltage Register Field Descriptions Bit Field Type Reset Description 15-4 VSHUNT R 000h Differential voltage measured across the shunt output. Two's complement value. 3-0 Reserved R 0h Always returns 0. Remove these bits from the full result by doing a right arithmetic shift Return to the Summary Table. 7.6.1.3 Bus Voltage Register (Address = 2h) [reset = 0000h] The bus voltage register is shown in Table 7-6. This register will only return positive values. If averaging is enabled, this register displays the averaged value. Table 7-6. Bus Voltage Register Field Descriptions Bit Field Type Reset Description 15 Reserved R 0b This bit returns Zero as common mode voltage is only positive 14-4 VBUS R 000h These bits readout the bus voltage of the system 3-0 Reserved R 0h Always returns 0. Remove these bits from the full result by doing a right arithmetic shift Return to the Summary Table. 7.6.1.4 POWER Register (Address = 3h) [reset = 0000h] The power register is shown in Table 7-7. If averaging is enabled, this register displays the averaged value. The Power Register records power in Watts by multiplying the decimal values of the Current Register with the decimal value of the Bus Voltage Register. This is an unsigned result. Table 7-7. POWER Register Field Descriptions Bit Field Type Reset Description 15-0 POWER R 0000h This bit returns a calculated value of power in the system. This is an unsigned result. Return to the Summary Table. 7.6.1.5 CURRENT Register (Address = 4h) [reset = 0000h] CURRENT is shown in Table 7-8. If averaging is enabled, this register displays the averaged value. The value of the Current Register is calculated by multiplying the decimal value in the Shunt Voltage Register with the decimal value of the Calibration Register. Table 7-8. CURRENT Register Field Descriptions Bit Field Type Reset Description 15-4 CURRENT R 000h Calculated current output in Amperes. Two's complement value. 3-0 RESERVED R 0h Always returns 0. Remove these bits from the full result by doing a right arithmetic shift Return to the Summary Table. www.ti.com INA234 SBOS844C – MAY 2021 – REVISED MARCH 2023 Copyright © 2023 Texas Instruments Incorporated Submit Document Feedback 21 Product Folder Links: INA234 |
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