bipolar latch versus latch?

Discussion in 'General Electronics Chat' started by U4EAH, Apr 14, 2010.

  1. U4EAH

    Thread Starter New Member

    Jun 10, 2008
    A latching Hall effect sensor - latches ON when sees South pole, stay ON until it sees North pole, alrighty, pretty straightforward....

    So how does a bipolar Hall effect latch work?

    What do they mean by 'bipolar' when discussing hall effect sensors? :confused:
    Last edited: Apr 14, 2010
  2. KMoffett

    AAC Fanatic!

    Dec 19, 2007
    Who are "they"? Got a link?

  3. Jazz Bass Special

    New Member

    Apr 9, 2010
  4. U4EAH

    Thread Starter New Member

    Jun 10, 2008
    They is "them", you know, those apocrophal types, those spurious dudes that write pages and pages of technical information with 47 footnotes and 11 exceptions to their absolute parameters, when all you really want to know is the inputs/outputs using the blackbox model, or at least a 1st-order approximation/model, like the classic "diode is like a check valve" other words, how does it work in three sentences or less.

    Okay, here's the link

    and a brief quote too:

    "The SS42R Series is a Bipolar Latching Hall IC with a pair of
    complementary push/pull outputs. A dual Hall element is used to offset
    stress induced noise and drift. The operate and release points are laser
    trimmed to insure near-zero symmetry. The robust outputs are capable of
    sourcing up to 6.4 mA and sinking up to 4.4 mA. The device contains
    inherent reverse polarity protection up to the full power supply rating."

    Alrighty, 'bipolar' means two poles are required to operate the HE switch, well two poles are required to operate a latching HE switch too (make it change states) , so how are the two switches different?

    The provided allegro link is great except they use the same picture (figure 1) to describe two different types of switches, but just change a few words in the accompaning text. Rocket science is great, but we do not always want to examine it on the sub-atomic level.