AS5045 View Datasheet(PDF) - austriamicrosystems AG

Part Name

Description

Manufacturer

AS5045

12 Bit Programmable Magnetic Rotary Encoder

austriamicrosystems AG 

AS5045

Data Sheet

6.4.5 Tristate CMOS Output: DO

(operating conditions: Tamb = -40 to +125°C, VDD5V = 3.0-3.6V (3V operation) VDD5V = 4.5-5.5V (5V operation)

unless otherwise noted)

Parameter

Symbol

Min

Max

Unit Note

High level output voltage

Low level output voltage

Output current

Tri-state leakage current

VOH

VDD5V –0.5

VOL

VSS+0.4

IO

4

2

IOZ

1

V

V

mA VDD5V: 4.5V

mA VDD5V: 3V

µA

6.5 Magnetic Input Specification

(operating conditions: Tamb = -40 to +125°C, VDD5V = 3.0-3.6V (3V operation) VDD5V = 4.5-5.5V (5V operation)

unless otherwise noted)

Two-pole cylindrical diametrically magnetised source:

Parameter

Symbol Min Typ Max Unit Note

Diameter

Thickness

Magnetic input field

amplitude

Magnetic offset

Field non-linearity

Input frequency

(rotational speed of

magnet)

Displacement radius

Eccentricity

Recommended magnet

material and

temperature drift

dmag

tmag

Bpk

Boff

fmag_abs

Disp

Ecc

4

6

2.5

mm Recommended magnet: Ø 6mm x 2.5mm for

mm cylindrical magnets

Required vertical component of the magnetic

45

75 mT field strength on the die’s surface, measured

along a concentric circle with a radius of 1.1mm

± 10 mT Constant magnetic stray field

5 % Including offset gradient

2.44

146 rpm @ 4096 positions/rev.; fast mode

Hz

0.61

36.6rpm @ 4096 positions/rev.; slow mode

0.25

mm

Max. offset between defined device center and

magnet axis (see Figure 18)

100 µm Eccentricity of magnet center to rotational axis

-0.12

-0.035

NdFeB (Neodymium Iron Boron)

%/K

SmCo (Samarium Cobalt)

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Revision 1.7

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