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AS5263
Datasheet - D e t a i l e d D e s c r i p t i o n
7.1 Operation
The AS5263 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 3) .
The VDD3 and VDD5 outputs are intended for internal use only. It must not be loaded with an external load.
Figure 3. External Circuitry for the AS5263 (figure shows only one sensor die)
5V Operation
1μF
VDD5_T
2.2μF
VDD3_T
2.2μF
VDD_T
LDO
Internal
VDD4.5V
LDO
Internal
VDD3.45V
4.5 - 5.5V
GNDD_T
GNDA_T
GNDP_T
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.
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.
www.austriamicrosystems.com/AS5263
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