APX9132_09 Datasheet, PDF (8/14 Pages) Anpec Electronics Coropration – Hall Effect Micro Switch IC

APX9132
Application Information
It is strongly recommended that an external bypass ca-
pacitor be connected (is close to the Hall sensor) be-
tween the supply and ground of the device to reduce both
external noise and noise generated by the chopper-sta-
bilization technique. This is especially true due to the
relatively high impedance of battery supplies.
Pole-independent
The pole-independent sensing technique allows for
operation with either a north or south pole magnet
orientation, enhancing the manufacturability of the device.
The state-of-the-art technology provides the same output
polarity for either pole in presence.
Awake & Sleep
Internal awake & sleep timing block circuit activates the
sensor for 180 µs and deactivates it for the remainder of
the period (60 ms). A short “awake” time allows for stabi-
lization prior to the sensor sampling and data latching on
the falling edge of the timing pulse. While in sleep cycle,
the output is latched in its previous state.
Chopper Stabilized Technique
The chopper stabilized technique cancels the mismatch-
ing of the hall element, the amplifier offset voltage and
temperature sensitive drift by the dynamic offset cancel-
lation and switched capacitor technique. This technique
produces devices have an extremely stable Hall output
voltage, therefore, the magnetic switch points are stable.
Copyright © ANPEC Electronics Corp.
8
Rev. A.4 - Apr., 2009
www.anpec.com.tw