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A6850 Datasheet(PDF) 11 Page - Allegro MicroSystems |
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A6850 Datasheet(HTML) 11 Page - Allegro MicroSystems |
11 / 12 page Dual Channel Switch Interface IC A6850 11 Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com Protection from EMI Transients generated by electromagnetic interference (EMI) can disturb operation of the A6850 or add unwanted noise to the signals being processed. The scheme shown in figure 9 illustrates possible supply decou- pling and signal filtering options. The selection of protection and filtering component values will depend on the details of the final application. The A6850 must be protected with a suitable bypass capacitor to prevent transients entering VIN. The capacitor should be as close to the VIN and GND pins as feasible. A pi-filter placed between the OUTPUTx pins and the sensor IC has been shown to demonstrate excellent performance in nor- mal automotive Bulk Cable Injection (BCI) testing. However, component selection and layout as well as cable specification and placement must be tailored to the individual application. EMC results should be validated. 0.1 μF 1000 pF 1 μF 100 Ω VIN VBAT GROUND A6850 Hall Device OUTPUT1 OUTPUT2 1 2 SENSE2 SENSE1 ENABLE2 ENABLE1 Figure 9. Decoupling and filtering suggestions |
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