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| TLV4964-4T_15 Datasheet, PDF (9/19 Pages) Infineon Technologies AG – High Precision Hall Effect Switch for Consumer Applications | |||
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TLV4964-4T
Functional Description
2.6
Default Start-up Behavior
The magnetic thresholds exhibit a hysteresis BHYS = BOP - BRP. In case of a power-on with a magnetic field B
within hysteresis (BOP > B > BRP) the output of the sensor is set to the pull up voltage level (VQ) per default. After
the first crossing of BOP or BRP of the magnetic field the internal decision logic is set to the corresponding
magnetic input value.
VDDA is the internal supply voltage which is following the external supply voltage VDD.
This means for B > BOP the output is switching, for B < BRP and BOP > B > BRP the output stays at VQ.
VDDA
tPon
3V
Power on ramp
VQ
Magnetic field above threshold
The device always applies
VQ level at start -up
t
independent from the
applied magnetic field !
B > BOP
t
VQ
Magnetic field below threshold
B < BRP
t
VQ
Magnetic field in hysteresis
BOP > B > BRP
t
Figure 6 Illustration of the Start-up Behavior of the TLV4964-4T
Data Sheet
9
Revision 1.0, 2015-05-18
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