NSE-5310_07 Datasheet, PDF (5/22 Pages) ams AG – Miniature Position Encoder with Zero Reference and IC Output

NSE-5310
Datasheet - Electrical Characteristics
6 Electrical Characteristics
Table 3. Operating Conditions
Symbol
Parameter
VDD5V
VDD3V3
Positive I/O Supply Voltage
VDDD/ VDDA
TAMB
I_supp
Positive Core Supply Voltage
Ambient Temperature
Supply Current
Conditions
5V Operation via LDO
IO structure on VDD5V connected to
VDD3V3
5V Operation over LDO Internal
analog and digital supply
-40ºF to +275ºF
6.1 Magnet Input Specification
Table 4. Two Pole Cylindrical Diametrically Magnetized Source
Symbol
Parameter
Conditions
pL
Pole Length
ppL
Pole Pair Length
Magnetic North & South Pole
pLV
Pole Length Variation
% of ppL 2mm
Required vertical component of the
B_pk
Magnetic input field amplitude
magnetic field strength on the die’s
surface
B_pkV
Magnetic input field variation
Amplitude variation over encoder
length
B_tc
Magnetic Field Temperature Drift
Samarium Cobalt ReComa28
typ – 0.035 %/K
B_off
Magnetic offset
Constant magnetic stray field
Vabs
Linear travelling speed
Absolute output
Min
Typ
Max
4.5
5.0
5.5
3
3.3
3.6
3
3.3
3.6
-40
125
16
21
Min
Typ
Max
1
2
±1.2
10
40
±2
-0.2
±5
see note below
Units
V
V
V
ºC
mA
Units
mm
mm
%
mT
%
%/K
mT
Note: There is no upper speed limit for the absolute outputs. With increasing speed, the distance between two samples increases. The trav-
elling distance between two subsequent samples can be calculated as:
sampling_dist = -^v--
fs
where:
sampling_distance = travelling distance between samples in mm
v = travelling speed in mm/sec
fs = sampling rate in Hz
Pole crossings need to be tracked to calculate absolute position beyond one pole pair. The ability to differentiate pole crossings may be
a speed limiting factor in such cases.
www.ams.com
Revision 1.5
5 - 22