TLE4980C

PRODUCT BRIEF Smart Hall Effect Sensor for Camshaft Applications Applications ■ Camshaft position sensor 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 (B min < 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 ■ P-SSO-3-9 TLE4980C Never stop thinking. PRODUCT VS OUT Overtemperature & Short-Circuit Protection Clamping BRIEF 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. Clamping & Reverse Voltage Protection Supply Regulator Hyst Comp Main Comp Enable N-Channel Open Drain Interface Hall Supply Analog Supply Digital Supply Spinning Hall Probe + _ Offset DAC Actual Switching Level Chopper & Filter Tracking ADC Digital min. max. Algorithm Bias for Temperature & Technology Compensation Oscillator GND Reset PROM K-Factor inv. Bit BTPO Parameter Operating voltage Power on time BTPO Programm. Range TCmagnet Frequency range Temperature range Tj k0 factor Value 3.3 ... 18