AS5043ASSU austriamicrosystems, AS5043ASSU Datasheet - Page 20

• Manufacturer Part Number: AS5043ASSU
• Description: IC, MAGNETIC ROTARY ENCODER 10BIT SSOP16
• Manufacturer: austriamicrosystems

Specifications of AS5043ASSU

• Ic Function: Encoder IC
• Supply Voltage Range: 3V To 3.6V, 4.5V To 5.5V
• Operating Temperature Range: -40°C To +125°C
• Digital Ic Case Style: SSOP
• No. Of Pins: 16
• Msl: MSL 3 - 168 Hours
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AS5043
Data Sheet – Choosing the Proper Magnet
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 field
B
(see Figure 18).
Figure 18: Typical Magnet and Magnetic Field Distribution
15.1 Physical Placement of the Magnet
The best linearity can be achieved by placing the center of the magnet exactly over the defined center of the IC package
as shown in Figure 19.
Figure 19: Defined IC Center and Magnet Displacement Radius
www.austriamicrosystems.com
v
at a given distance, along a concentric circle with a radius of 1.1mm (R1), should be in the range of ±45mT…±75mT.
Vertical field
component
2.433 mm
2.433 mm
N
R1
1
typ. 6mm diameter
Area of recommended maximum
magnet misalignment
3.9 mm
S
R1 concentric circle;
radius 1.1mm
Magnet axis
Magnet axis
N
S
R
Revision 1.80
d
Defined
center
3.9 mm
Vertical field
component
Bv
0
360
(45…75mT)
360
20 – 36