AS5035 – 64 PPR INCREMENTAL MAGNETIC ROTARY ENCODER

Revision 1.5

www.austriamicrosystems.com

Page 12 of 17

12.3.3

CMOS Outputs: A, B, Index, OTP_DO

Parameter

Symbol

Min

Max

Unit

Note

High level output voltage

VDD5V-0.5

V

Low level output voltage

VSS+0.4

V

Output current

4

2

mA

mA

VDD5V: 4.5V

VDD5V: 3V

12.4 Magnetic Input Specification

Two-pole cylindrical diametrically magnetised source:

Parameter

Symbol

Min

Typ

Max

Unit

Note

Diameter

4

6

mm

Thickness

2.5

mm

Recommended magnet Ø 6mm x 2.5mm for cylindrical

magnets

Magnetic input field

amplitude

45

75

mT

Required vertical component of the magnetic field strength

on the die’s surface, measured along a concentric circle

with a radius of 1.1mm

Magnetic offset

± 10

mT

Constant magnetic stray field

Field non-linearity

5

%

Including offset gradient

Input frequency

(rotational speed of

magnet)

500

Hz

Incremental mode: no missing pulses at rotational speeds

of up to 30,000 rpm

Magnetic field temperature

drift

– 0.035

%/K

Samarium Cobalt ReComa28

Displacement radius

Disp

0.25

mm

Max. offset between defined device center and magnet

axis

12.5 Electrical System Specifications

Parameter

Symbol

Min

Typ

Max

Unit Note

LSB

1.406

deg

Degrees / step

Resolution

RES

8

64

bit

ppr

Channel A and B

Index bit width

1.406

deg

Integral non-linearity (optimum)

± 0.5

deg

Maximum error with respect to the best line fit.

Centered magnet placement without calibration,

Integral non-linearity (optimum)

± 0.9

deg

Maximum error with respect to the best line fit.

Centered magnet placement without calibration,

Integral non-linearity

INL

± 1.4

deg

Over displacement tolerance with 6mm diameter

Differential non-linearity

DNL

± 0.176

deg

no missing codes

Transition noise

TN

0.06

Deg

rms

rms = 1 sigma (see 10.2)

Hysteresis

Hyst

0.704

deg

Power-on reset thresholds

On voltage; 300mV typ. hysteresis

Off voltage; 300mV typ. hysteresis

1,37

1.08

2.2

1.9

2.9

2.6

V

V

DC supply voltage 3.3V (VDD3V3)

DC supply voltage 3.3V (VDD3V3)