AS5046 AB austriamicrosystems, AS5046 AB Datasheet - Page 15

• Manufacturer Part Number: AS5046 AB
• Description: BOARD ADAPTER AS5046
• Manufacturer: austriamicrosystems

Specifications of AS5046 AB

• Sensor Type: Magnetic, Rotary Position
• Sensing Range: 360°
• Interface: Serial
• Voltage - Supply: 9V
• Embedded: No
• Utilized Ic / Part: AS5046
• Lead Free Status / RoHS Status: Lead free by exemption / RoHS compliant by exemption
• Sensitivity: -

AS5046
Data Sheet
For 5V operation, the 5V supply is connected to pin VDD5V, while VDD3V3 (LDO output) must be buffered by a
2.2...10µF capacitor, which should be placed close to the supply pin (see Figure 5).
The VDD3V3 output is intended for internal use only It should not be loaded with an external load.
The voltage levels of the digital interface I/O’s correspond to the voltage at pin VDD5V, as the I/O buffers are supplied
from this pin (see Figure 5).
A buffer capacitor of 100nF is recommended in both cases close to pin VDD5V. Note that pin VDD3V3 must always
be buffered by a capacitor. It must not be left floating, as this may cause an instable internal 3.3V supply voltage
which may lead to larger than normal jitter of the measured angle.
10 Two Wire Serial Interface
The AS5046 is accessible via a bi-directional serial interface.
CSn must always be tied to VSS during serial data transmission.
10.1 Serial Interface Timing Diagrams
The registers in the AS5046 are available in a data length of 8 bit (1 byte), 24 bit (3 bytes) and 32 bit (4 bytes).
Shown below in Figure 6 is a common 8-bit data transfer.
Figure 6 8-bit Serial Read / Write Timing
Figure 7 shows a transfer timing diagram for the first 16 bits of the Serial Interface Unit.
Figure 7 16-bit Serial Read / Write Timing
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