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AS5046

PROGRAMMABLE 12-bit 360° MAGNETIC ANGLE ENCODER WITH ABSOLUTE 2-WIRE SERIAL AND ANALOG INTERFACES

austriamicrosystems AG 

AS5046 Programmable 360° Magnetic Angle Encoder – Preliminary Data Sheet

5.4 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

Diameter

Thickness

Symbol

dmag

tmag

Magnetic input field amplitude Bpk

Magnetic offset

Boff

Field non-linearity

Input frequency

(rotational speed of magnet)

fmag_abs

fmag_inc

Displacement radius

Disp

Recommended magnet material

and temperature drift

Min

4

2.5

45

Typ Max

6

75

± 10

5

10

166

0.25

-0.12

-0.035

Unit

mm

mm

mT

mT

%

Hz

Hz

mm

%/K

Note

Recommended magnet: Ø 6mm x 2.5mm for cylindrical

magnets

Required vertical component of the magnetic field strength on

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

radius of 1.1mm

Constant magnetic stray field

Including offset gradient

Absolute mode: 600 rpm @ readout of 1024 positions

(see table 6)

Incremental mode: no missing pulses at rotational speeds of

up to 10,000 rpm (see table 6)

Max. offset between defined device center and magnet axis

NdFeB (Neodymium Iron Boron)

SmCo (Samarium Cobalt)

5.5 Electrical System Specifications

(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 Typ Max

Unit Note

Resolution 1)

RES

12

bit

0.088 deg

Integral non-linearity (optimum) 1) INLopt

Maximum error with respect to the best line fit.

± 0.5 deg

Verified at optimum magnet placement, Tamb =25 °C.

Integral non-linearity (optimum) 1) INLtemp

Maximum error with respect to the best line fit.

± 0.9 deg Verified at optimum magnet placement ,

Tamb = -40 to +125°C

Integral non-linearity 1)

INL

Differential non-linearity 1)

DNL

± 1.4 deg

± 0.044 deg

Best line fit = (Errmax – Errmin) / 2

Over displacement tolerance with 6mm diameter magnet,

Tamb = -40 to +125°C

12bit, no missing codes

Transition noise 1)

TN

0.06

Deg 1 sigma, fast mode (pin MODE = 1)

0.03

RMS 1 sigma, slow mode (pin MODE=0 or open)

Power-on reset thresholds

On voltage; 300mV typ. hysteresis Von

Off voltage; 300mV typ. hysteresis Voff

1.37 2.2 2.9

1.08 1.9 2.6

DC supply voltage 3.3V (VDD3V3)

V

DC supply voltage 3.3V (VDD3V3)

V

Power-up time,

Until offset compensation finished, tPwrUp

OCF = 1, Angular Data valid

20

fast mode (pin MODE=1)

ms

80

slow mode (pin MODE=0 or open)

System propagation delay

absolute output : delay of ADC and tdelay

DSP

96

fast mode (pin MODE=1)

µs

384

slow mode (pin MODE=0 or open)

Revision 1.1

www.austriamicrosystems.com

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