AS5040

Data Sheet

www.austriamicrosystems.com

Revision 2.10

22 - 33

Figure 19: Connections for 5V / 3.3V Supply Voltages

LDO

I

N

T

E

R

F

A

C

E

2.2...10µF

100n

4.5 - 5.5V

DO

Prog

Index_W

B_Dir_V

A_LSB_U

CLK

PWM_LSB

VDD3V3

VSS

VDD5V

5V Operation

Internal

VDD

CSn

LDO

100n

3.0 - 3.6V

VDD3V3

VSS

VDD5V

3.3V Operation

Internal

VDD

I

N

T

E

R

F

A

C

E

DO

Prog

Index_W

B_Dir_V

A_LSB_U

CLK

PWM_LSB

CSn

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.

15 Choosing the Proper Magnet

Typically the magnet should be 6mm in diameter and ≥2.5mm in height. Magnetic materials such as rare earth

AlNiCo, SmCo5 or NdFeB are recommended.

The magnet’s field strength perpendicular to the die surface should be verified using a gauss-meter. The magnetic

±45mT…±75mT. (see Figure 20).