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Zakładka z wyszukiwarką danych komponentów |
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Zakładka z wyszukiwarką danych komponentów |
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L9678P Arkusz danych(PDF) 136 Page - STMicroelectronics |
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L9678P Arkusz danych(HTML) 136 Page - STMicroelectronics |
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136 / 203 page  DC sensor interface L9678P, L9678P-S 136/203 DocID029274 Rev 3 9 DC sensor interface L9678P implements a circuitry able to interface with a variety of positioning sensors. The sensors that can be connected to the device are Hall-effect, resistive or simple switches. Range of measurements is: Resistive sensor: 65 Ω to 3 kΩ Hall-effect sensor: 2 mA to 20 mA. Within the above ranges, accuracy of ±15% is granted. A reduced accuracy is given in the range 1 mA to 2 mA. Hall sensor and switch interface block diagram is shown below. Figure 38. Switch sensor interface block diagram The global SPI contains several bits to control and configure the interface. The SWOEN bit is used to enable the output voltage on DCSx pins. The channel to be activated can be chosen by setting CHID bits accordingly. The interface activation is completely controlled by user SPI command. The interface could be optionally configured for "automatic switch-off" immediately after the current or resistance measurement completion by setting the EN_AUTO_SWITCH_OFF bit in the SYS_CFG register. |
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