AH372-SA-7

AH372-SA-7 is a single-digital-output hall-effect latch sensor with an internal pullup resistor for high-temperature operation. The device includes an on-chip Hall voltage generator for magnetic sensing, an amplifier to amplify the Hall voltage, and a comparator to provide switching hysteresis for noise rejection, and an output driver with a pullup resistor. An internal bandgap regulator provides a temperature-compensated supply voltage for internal circuits and allows a wide operating supply range. When the magnetic flux density (B) perpendicular to the package is larger than the operation point (BOP), output is switched on (OUT pin is pulled low). The output state is held on until a magnetic flux density reversal falls below BRP. When B is less than BRP, the output is switched off. Applications include rotor position sensing for motor commutations, encoders, speed measurements – RPM monitors, contactless current switches.

• Bipolar hall-effect latch operation
• 2.2V to 20V operating range
• Single output with built-in pullup resistor
• Output on voltage is 300mV typ at IOUT = 20mA, TA = +25°C, VDD = 12V
• Supply current is 2mA typ at B < BRP, TA = +25°C, VDD = 12V
• Output leakage current is < 0.1µA typ at output off, TA = +25°C, VDD = 12V
• Internal pull-up resistor is 10kohm typ at TA = +25°C, VDD = 12V
• SOT23 package
• Operating temperature range from -40 to +125°C