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TMCS1101 Datasheet(PDF) 32 Page - Texas Instruments |
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TMCS1101 Datasheet(HTML) 32 Page - Texas Instruments |
32 / 48 page OS EXT 2 2 2 2 RSS I PSRR CMRR B S NL e (%) e e e e e e EXT EXT B IN B G e (%) I CM CMRR IN CMRR * V e (%) I OS OS I IN I e (%) I Input Current (A) 0 5 10 15 20 25 0 1 2 3 4 5 6 7 8 9 10 D008 RSS Max Error, 25°C 566 0D[ (UURU ± ƒ&WRƒ& 566 0D[ (UURU ± ƒ&WR ƒ& 32 TMCS1101 SBOS825A – SEPTEMBER 2019 – REVISED MAY 2020 www.ti.com Product Folder Links: TMCS1101 Submit Documentation Feedback Copyright © 2019–2020, Texas Instruments Incorporated Application Information (continued) Figure 45. RSS Error vs Input Current 10.1.1.1 Room Temperature Error Calculations For room-temperature total-error calculations, specifications across temperature and drift are ignored. As an example, consider a TMCS1101A1B with a supply voltage (VS) of 3.3 V and a worst-case common-mode excursion of 600 V to calculate operating-point-specific parameters. Consider a measurement error due to an external magnetic field of 30 µT, roughly the Earth's magnetic field strength. The full-scale current range of the device in specified conditions is slightly greater than 33 A; therefore, calculate error at both 25 A and 12.5 A to highlight error dependence on the input-current level. Table 1 shows the individual error components and RSS maximum total error calculations at room temperature under the conditions specified. Relative to other errors, the additional error from CMRR is negligible, and can typically be ignored for total error calculations. Table 1. Total Error Calculation: Room Temperature Example ERROR COMPONENT SYMBOL EQUATION % TOTAL ERROR AT IIN = 25 A % TOTAL ERROR AT IIN = 12.5 A Input offset error eIos 0.36% 0.72% CMRR error eCMRR 0.01% 0.02% External Field error eBext 0.41% 0.82% Sensitivity error eS Specified in Electrical Characteristics 0.8% 0.8% Nonlinearity error eNL Specified in Electrical Characteristics 0.05% 0.05% RSS total error eRSS 1.12% 1.77% 10.1.1.2 Full Temperature Range Error Calculations To calculate total error across any specific temperature range, Equation 27 and Equation 28 should be used for RSS maximum total errors, similar to the example for room temperatures. Conditions from the example in Room Temperature Error Calculations have been replaced with their respective equations and error components for a –40°C to 85°C temperature range below in Table 2. |
Similar Part No. - TMCS1101_V01 |
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Similar Description - TMCS1101_V01 |
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