Two-wire current-type Hall switch sensor - AH542

AH542 is a Hall switch sensor designed based on BCDMOS technology. The sensor includes a temperature-compensated Hall element, dynamic offset cancellation amplifier, comparator, and output stage. The chip has a current output. The comparator compares the actual magnetic flux with a fixed reference value (switching point) to control the current of the output MOSFET. Active offset compensation produces magnetic characteristics with specific temperature coefficients at various supply voltages. In addition, mechanical stress has minimal effect on magnetic parameters.

This series of chip sensors is suitable for industrial environments and automotive applications, with an ambient temperature range of -40°C to 150°C and a supply voltage range of 3.0V to 30V. AH542 is available in three package types: TO92S, SOT23 (small), and SOT23-3L, all RoHS compliant, and the product has passed AEC-Q100 certification.

I.Two-wire current-type Hall switch sensor -Features of AH542:

AEC-Q100 Grade 0 automotive-grade certification
Operating voltage: 3.0V to 30V
ESD：±12kV
Strong mechanical stress resistance
Switching points with specific temperature coefficients
Temperature range: -40°C to 150°C
Reverse voltage protection on power pins
Suitable for automotive and industrial applications

II.Two-wire current-type Hall switch sensor -Applications of AH542:

Speed and RPM sensors

Tachometer sensors, flow sensors

DC motors, motor and fan control, robot control

Proximity sensors, position sensors

Safety belts, hoods, trunk locks

Sunroof/convertible/tailgate/liftgate actuation

Brake/clutch pedals

Electric power steering (EPS)

Transmission shifting

Wiper motors