AS5311

Data Sheet

www.austriamicrosystems.com

Revision 1.01

8 - 23

6.3.4

Tristate CMOS Output: DO

otherwise noted.

Parameter

Symbol

Min

Max

Unit

Note

High level output voltage

VOH

VDD5V –0.5

V

Low level output voltage

VOL

VSS+0.4

V

Output current

IO

4

2

mA

mA

VDD5V: 4.5V

VDD5V: 3V

6.4

Magnetic Input Specification

otherwise noted.

Two-pole cylindrical diametrically magnetised source:

Parameter

Symbol

Min

Typ

Max

Unit

Note

Pole length

Lp

1

mm

Pole pair length

2

mm

Recommended magnet: plastic or rubber

bonded ferrite or NdFeB

Magnetic input field

amplitude

10

40

mT

Required vertical component of the magnetic

field strength on the die’s surface

Magnetic offset

± 5

mT

Constant magnetic stray field

Magnetic field

temperature drift

0.2

%/K

Recommended magnet: plastic or rubber

bonded ferrite or NdFeB

Magnetic input field

variation

±2

%

Including offset gradient

Linear travelling speed

Vabs

650

mm/

sec

Incremental output: 1024 steps / polepair

including interpolation

1)

Displacement

Disp

0.5

mm

Max. shift between defined Hall sensor

center and magnet centerline (see Figure

17); depends on magnet geometries

Vertical gap

0.3

mm

Package to magnet surface;

depends on magnet strength

-0.19

Plastic or rubber bonded Ferrite

Recommended magnet

material and

temperature drift

-0.12

%/K

Plastic or rubber bonded Neodymium

(NdFeB)

Note

samples increases. The travelling distance between two subsequent samples can be calculated as:

where: sampling_distance = travelling distance between samples in mm

v = travelling speed in mm/sec

fs = sampling rate in Hz

(see 6.5 below)

6.5

Electrical System Specifications

otherwise noted.

Parameter

Symbol

Min

Typ

Max

Unit

Note

Resolution, absolute outputs

12

bit /

polepair

0.488 um/step (12bit / 2mm pole

pair)

Resolution, incremental

outputs

10

bit /

polepair

1.95 um/step (10bit / 2mm pole

pair)

Integral non-linearity

(optimum)

± 5.6

μm

Maximum error with respect to the

best line fit. Ideal magnet

fs

v

dist

sampling

=

_