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INA228 Datasheet(PDF) 24 Page - Texas Instruments |
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INA228 Datasheet(HTML) 24 Page - Texas Instruments |
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24 / 48 page  Table 7-6. ADC_CONFIG Register Field Descriptions (continued) Bit Field Type Reset Description 2-0 AVG R/W 0h Selects ADC sample averaging count. The averaging setting applies to all active inputs. When >0h, the output registers are updated after the averaging has completed. 0h = 1 1h = 4 2h = 16 3h = 64 4h = 128 5h = 256 6h = 512 7h = 1024 7.6.1.3 Shunt Calibration (SHUNT_CAL) Register (Address = 2h) [reset = 1000h] The SHUNT_CAL register is shown in Table 7-7. Return to the Summary Table. Table 7-7. SHUNT_CAL Register Field Descriptions Bit Field Type Reset Description 15 RESERVED R 0h Reserved. Always reads 0. 14-0 CURRLSB R/W 1000h The register provides the device with a conversion constant value that represents shunt resistance used to calculate current value in Amperes. This also sets the resolution for the CURRENT register. Value calculation under Section 8.1.2. 7.6.1.4 Shunt Temperature Coefficient (SHUNT_TEMPCO) Register (Address = 3h) [reset = 0h] The SHUNT_TEMPCO register is shown in Table 7-8. Return to the Summary Table. Table 7-8. SHUNT_TEMPCO Register Field Descriptions Bit Field Type Reset Description 15-14 RESERVED R 0h Reserved. Always reads 0. 13-0 TEMPCO R/W 0h Temperature coefficient of the shunt for temperature compensation correction. Calculated with respect to +25°C. The full scale value of the register is 16383 ppm/°C. The 16 bit register provides a resolution of 1ppm/°C/LSB 0h = 0 ppm/°C 3FFFh = 16383 ppm/°C 7.6.1.5 Shunt Voltage Measurement (VSHUNT) Register (Address = 4h) [reset = 0h] The VSHUNT register is shown in Table 7-9. Return to the Summary Table. Table 7-9. VSHUNT Register Field Descriptions Bit Field Type Reset Description 23-4 VSHUNT R 0h Differential voltage measured across the shunt output. Two's complement value. Conversion factor: 312.5 nV/LSB when ADCRANGE = 0 78.125 nV/LSB when ADCRANGE = 1 INA228 SLYS021 – JANUARY 2021 www.ti.com 24 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated Product Folder Links: INA228 |
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