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NSE-5310

Data Sheet - E l e c t r i c a l C h a r a c t e r i s t i c s

6 Electrical Characteristics

6.1 Magnet Input Specification

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 =

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.

Table 3. Operating Conditions

Symbol

Parameter

Conditions

Min

Typ

Max

Units

VDD5V

Positive I/O Supply Voltage

5V Operation via LDO

4.5

5.0

5.5

V

VDD3V3

IO structure on VDD5V connected to

VDD3V3

33.3

3.6

V

VDDD/ VDDA

Positive Core Supply Voltage

5V Operation over LDO Internal

analog and digital supply

33.3

3.6

V

Ambient Temperature

-40ºF to +275ºF

-40

125

ºC

Supply Current

16

21

mA

Table 4. Two Pole Cylindrical Diametrically Magnetized Source

Symbol

Parameter

Conditions

Min

Typ

Max

Units

pL

Pole Length

1mm

ppL

Pole Pair Length

Magnetic North & South Pole

2

mm

pLV

Pole Length Variation

% of ppL 2mm

±1.2

%

Magnetic input field amplitude

Required vertical component of the

magnetic field strength on the die’s

surface

10

40

mT

Magnetic input field variation

Amplitude variation over encoder

length

±2

%

Magnetic Field Temperature Drift

Samarium Cobalt ReComa28

typ – 0.035 %/K

-0.2

%/K

Magnetic offset

Constant magnetic stray field

±5

mT

Vabs

Linear travelling speed

Absolute output

see note below

v

fs

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