AH3774-SA-7

AH3774-SA-7 is a high-voltage, high-sensitivity hall-effect latch IC. With chopper-stabilized architecture and an internal bandgap regulator to provide a temperature-compensated supply for internal circuits, the AH3774 provides a reliable solution over the whole operating range. For robustness and protection, the device has a reverse blocking diode with a Zener clamp on the supply. The output has an overcurrent limit and a Zener clamp. When the magnetic flux density (B) perpendicular to the package is larger than the operating point (Bop) the output is switched on (pulled low). The output is held latched until magnetic flux density reverses and becomes lower than the release point (Brp). Applications include brushless DC motor commutation, RPM measurement, flow meters, angular and linear encoders and position sensors, contactless commutation, speed measurement and angular position sensing/indexing in consumer home appliances, office equipment and industrial applications.

• Bipolar latch (south pole: on, north pole: off)
• 3.0V to 28V operating voltage range
• Single, open-drain output with overcurrent limit
• Chopper-stabilized design provides superior temperature stability
• Minimal switch-point drift, enhanced immunity to stress
• Good RF noise immunity, ESD (HBM): 6kV
• Reverse-blocking diode and Zener clamp on supply
• Output-leakage current is <0.1µA typ at VOUT=28V, B<BRP, output off, TA=-40 to 125°C, VDD=3V to 28V
• SOT23 package
• Operating temperature range from -40 to +125°C