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AS5035 Datasheet(PDF) 13 Page - ams AG

Part # AS5035
Description  PROGRAMMABLE 64 PPR INCREMENTAL MAGNETIC ROTARY ENCODER
PDF  18 Pages
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Manufacturer  AMSCO [ams AG]
Direct Link  http://www.ams.com
Logo AMSCO - ams AG

AS5035 Datasheet(HTML) 13 Page - ams AG

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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
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
12.4 Magnetic Input Specification
Two-pole cylindrical diametrically magnetised source:
Parameter
Symbol
Min
Typ
Max
Unit
Note
Diameter
dmag
4
6
mm
Thickness
tmag
2.5
mm
Recommended magnet Ø 6mm x 2.5mm for cylindrical
magnets
Magnetic input field
amplitude
Bpk
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
Boff
± 10
mT
Constant magnetic stray field
Field non-linearity
5
%
Including offset gradient
Input frequency
(rotational speed of
magnet)
fmag_inc
500
Hz
Incremental mode: no missing pulses at rotational speeds
of up to 30,000 rpm
Magnetic field temperature
drift
Btc
– 0.035
%/K
Samarium Cobalt ReComa28
Displacement radius
Disp
0.25
mm
Max. offset between defined device center and magnet
axis
(see Figure 11)
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
tw,Index
1.406
deg
= 1 LSB (see Table 3)
Integral non-linearity (optimum)
INLopt
± 0.5
deg
Maximum error with respect to the best line fit.
Centered magnet placement without calibration,
Tamb =25 °C.
Integral non-linearity (optimum)
INLtemp
± 0.9
deg
Maximum error with respect to the best line fit.
Centered magnet placement without calibration,
Tamb = -40 to +125°C
Integral non-linearity
INL
± 1.4
deg
Best line fit = (Errmax – Errmin) / 2
Over displacement tolerance with 6mm diameter
magnet, without calibration Tamb = -40 to +125°C
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
Von
Voff
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)



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