Block Diagram
The IC consists of a chopped hall-probe (mono-cell in the centre of the chip) with a chopped preamplifier. Next there is a summing node for threshold level adjustment. The threshold switching is actually done in the main comparator. A converter feeds a digital calibration logic. This logic monitors the digitalized signal by looking for minimum and maximum values and also calculates correction values for threshold adjustment. The static switching level is simply done by fetching a digital value out of a PROM.

FEATUREs
■ TPO True Power On functionality
■ Mono-cell chopped Hall system
■ TIM Twisted Independent
   Mounting
■ Dynamic self-calibrating
   algorithm
■ End-of-line programmable
   switching points
■ TC of back-bias magnet
   programmable
■ High sensitivity (Bmin < 1.5 mT)
   and high stability of the
   magnetic switching points
■ High resistance to mechanical
   stress
■ Digital output signal
   (voltage interface)
■ Short-circuit protection
■ Module style package with two
   4.7 nF integrated capacitors

APPLICATIONs
■ Camshaft position sensor