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AS5163 Datasheet(PDF) 8 Page - ams AG |
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AS5163 Datasheet(HTML) 8 Page - ams AG |
8 / 36 page www.austriamicrosystems.com/AS5163 Revision 2.7 8 - 36 AS5163 Datasheet - Detailed Descr i p ti on 7.1 Operation The AS5163 operates at 5V ±10%, using two internal Low-Dropout (LDO) voltage regulators. For operation, the 5V supply is connected to pin VDD. While VDD3 and VDD5 (LDO outputs) must be buffered by 2.2µF capacitors, the VDD requires a 1µF capacitor. All capacitors (low ESR ceramic) are supposed to be placed close to the supply pins (see Figure 4). The VDD3 and VDD5 outputs are intended for internal use only. It must not be loaded with an external load. Figure 4. Connections for 5V Supply Voltages 7.1.1 VDD Voltage Monitor VDD Overvoltage Management. If the voltage applied to the VDD pin exceeds the overvoltage upper threshold for longer than the detection time, then the device enters a low power mode reducing the power consumption. When the overvoltage event has passed and the voltage applied to the VDD pin falls below the overvoltage lower threshold for longer than the recovery time, then the device enters the normal mode. VDD5 Undervoltage Management. When the voltage applied to the VDD5 pin falls below the undervoltage lower threshold for longer than the VDD5_detection time, then the device stops the clock of the digital part and the output drivers are turned off to reduce the power consumption. When the voltage applied to the VDD5 pin exceeds the VDD5 undervoltage upper threshold for longer than the VDD5_recovery time, then the clock is restarted and the output drivers are turned on. Notes: 1. The pins VDD3 and VDD5 must always be buffered by a capacitor. These pins must not be left floating, as this may cause unstable internal supply voltages, which may lead to larger output jitter of the measured angle. 2. Only VDD is overvoltage protected up to 27V. In addition, the VDD has a reverse polarity protection. 2.2µF 1µF 4.5 - 5.5V VDD5 GND VDD 5V Operation Internal VDD 4. 5 V LDO Internal VDD 3.45V VDD 3 LDO 2.2µF |
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