AS5043 datasheet(22/26 Pages) AMSCO

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AS5043 Programmable 360° Magnetic Angle Encoder

Revision 1.4, 04-Apr-06

www.austriamicrosystems.com

Page 22 of 26

19.3.6 OPAMP output stage

Parameter

Symbol

Min

Typ

Max

Unit

Note

Power Supply Range

VDD5V

3.0

5.5

Parallel Load Capacitance

100

Parallel Load Resistance

4.7

Ω

3.3V operation

Open Loop Gain

130

144

Offset Voltage RTI

VosOP

-5

3 sigma

Output Range Low

VoutL

0.05 * VDD5V V

Output Range High

VoutH

0.95 * VDD5V

Linear range of analog output

current capability sink

Isink

4.8

Permanent short circuit current:

Vout to VDD5V

current capability source

Isource

4.6

Permanent short circuit current:

Vout to VSS

Output noise

Vnoise

160

220

490

µVrms

Over full temperature range;

BW= 1Hz…10MHz,Gain = 2x

Internal: FB_int EN = 1

OPAMP gain (non-inverting)

Gain

Times

FB_int EN = 0

With external resistors, pins Vout

[#12] and FB [#11]:

19.4 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

Symbol

Min

Typ

Max

Unit

Note

Diameter

dmag

Recommended diameter: 6mm for cylindrical magnets

Magnetic input field amplitude

Bpk

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

Boff

± 5

Constant magnetic stray field

Field non-linearity

Including offset gradient

fmag_abs

Absolute mode: 600 rpm @ readout of 1024 positions

(see table 6)

Input frequency

(rotational speed of magnet)

fmag_inc

166

Incremental mode: no missing pulses at rotational speeds

of up to 10,000 rpm (see table 6)

Displacement radius

Disp

0.25

Max. offset between defined device center and magnet

axis

-0.12

NdFeB (Neodymium Iron Boron)

Recommended magnet material

and temperature drift

-0.035

%/K

SmCo (Samarium Cobalt)

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