AS5140 AB austriamicrosystems, AS5140 AB Datasheet - Page 23

• Manufacturer Part Number: AS5140 AB
• Description: BOARD ADAPTER AS5140
• Manufacturer: austriamicrosystems

Specifications of AS5140 AB

• Sensor Type: Magnetic, Rotary Position
• Sensing Range: 360°
• Interface: Serial
• Voltage - Supply: 5V
• Embedded: No
• Utilized Ic / Part: AS5140
• Lead Free Status / RoHS Status: Lead free by exemption / RoHS compliant by exemption
• Sensitivity: -
• Other names: AS5140H AB; AS5140H AB

AS5140H
Data Sheet - D e t a i l e d D e s c r i p t i o n
Figure 15. Enabling the Alignment Mode
Figure 16. Exiting Alignment Mode
7.8 3.3V / 5V Operation
The AS5140H operates either at 3.3V ±10% or at 5V ±10%. This is made possible by an internal 3.3V Low-Dropout (LDO) voltage regulator. The
internal supply voltage is always taken from the output of the LDO, meaning that the internal blocks are always operating at 3.3V. For 3.3V
operation, the LDO must be bypassed by connecting VDD3V3 with VDD5V
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 is
supposed to be placed close to the supply pin
external load.
The output voltage of the digital interface I/O’s corresponds to the voltage at pin VDD5V, as the I/O buffers are supplied from this pin
17). 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.
www.austriamicrosystems.com/AS5140H
CSn
Prog
CSn
Prog
(see Figure
2µs
min.
17). The VDD3V3 output is intended for internal use only. It must not be loaded with an
min.
2µs
AlignMode enable
exit AlignMode
Revision 1.4
(see Figure
17).
Read-out
Read-out
via SSI
via SSI
(see Figure
23 - 37