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PDF TLE4942 Data sheet ( Hoja de datos )
| Número de pieza | TLE4942 | |
| Descripción | Differential Two-Wire Hall Effect Sensor IC | |
| Fabricantes | Infineon Technologies AG | |
| Logotipo |  |
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Differential Two-Wire Hall Effect Sensor IC TLE4942
TLE4942C
Features
• Two-wire PWM current interface
• Detection of rotation direction
• Airgap diagnosis
• Assembly position diagnosis
• Dynamic self-calibration principle
• Single chip solution
• No external components needed
• High sensitivity
• South and north pole pre-induction possible
• High resistance to piezo effects
• Large operating air-gaps
• Wide operating temperature range
• TLE4942C: 1.8nF overmolded capacitor
PSSO2-1
Type
TLE 4942
TLE 4942C
Marking
4200E4
42C0E4
Ordering Code
Q62705-K428
Q62705-K437
Package
PSSO2-1
PSSO2-2
1 page  
TLE4942, TLE4942C
In addition to the speed signal, the following information is provided by varying the
length of the output pulses in Figure 3 (PWM modulation):
Airgap Warning range = Warning
Warning information is issued in the output pulse length when the magnetic field is
below a critical value. (E. g. the airgap between the Hall Effect IC and the target
wheel exceeds a critical value). The device works with reduced functionality.
Assembly position range = EL
EL information is issued in the output pulse length when the magnetic field is below a
predefined value (the airgap between the Hall Effect IC and the target wheel exceeds
a predefined value). The device works with full functionality.
Direction of rotation right = DR-R
DR–R information is issued in the output pulse length when the target wheel in front
of the Hall Effect IC moves from the pin GND to the pin VCC.
Direction of rotation left = DR-L
DR–L information is issued in the output pulse length when the target wheel in front
of the Hall Effect IC moves from the pin VCC to the pin GND.
DR-L
S 0015
4942
DR-R
Figure 5 Definition of rotation direction
TLE4942 - TLE4942C Data Sheet
5
February 2002
5 Page 
I
tr tf
IHigh
90%
10%
ILow
50%
t1
TLE4942, TLE4942C
t
Figure 6 Definition of rise and fall time
Timing Characteristics
Parameter
Pre-low length
Length of Warning pulse
Length of DR-L pulse
Length of DR-R pulse
Length of DR-L & EL
pulse
Length of DR-R & EL
pulse
Output of EL pulse,
maximum frequency
Length of stand still pulse
Stand still period 1)
Symbol
tpre-low
tWarning
tDR-L
tDR-R
tDR-L&EL
tDR-R&EL
f EL, max
tstop
Tstop
Limit values
Min Typ Max
38 45 52
38 45 52
76 90 104
153 180 207
306 360 414
616 720 828
117
1.232 1.44 1.656
590 737 848
Unit
µs
µs
µs
µs
µs
µs
Hz
ms
ms
Remarks
Def. Fig.9
Def. Fig. 9
1) If no magnetic switching edge is detected for a period longer than Tstop, the stand
still pulse is issued.
TLE4942 - TLE4942C Data Sheet
11
February 2002
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet TLE4942.PDF ] | |
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