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INA238 bảng dữ liệu(PDF) 23 Page - Texas Instruments |
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INA238 bảng dữ liệu(HTML) 23 Page - Texas Instruments |
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23 / 49 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 Voltage Measurement (VSHUNT) Register (Address = 4h) [reset = 0h] The VSHUNT register is shown in Table 7-8. Return to the Summary Table. Table 7-8. VSHUNT Register Field Descriptions Bit Field Type Reset Description 15-0 VSHUNT R 0h Differential voltage measured across the shunt output. Two's complement value. Conversion factor: 5 µV/LSB when ADCRANGE = 0 1.25 µV/LSB when ADCRANGE = 1 7.6.1.5 Bus Voltage Measurement (VBUS) Register (Address = 5h) [reset = 0h] The VBUS register is shown in Table 7-9. Return to the Summary Table. Table 7-9. VBUS Register Field Descriptions Bit Field Type Reset Description 15-0 VBUS R 0h Bus voltage output. Two's complement value, however always positive. Conversion factor: 3.125 mV/LSB www.ti.com INA238 SLYS025 – JANUARY 2021 Copyright © 2021 Texas Instruments Incorporated Submit Document Feedback 23 Product Folder Links: INA238 |
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