A1392 Datasheet | Allegro MicroSystems

A1391, A1392, A1393, and A1395 Micropower 3 V Linear Hall-Effect Sensor ICs with Tri-State Output and User-Selectable Sleep Mode Features AND BENEFITS - High-impedance output during sleep mode - patible with 2.5 to 3.5 V power supplies - 10 m W power consumption in the active mode - Miniature MLP/DFN package - Ratiometric output scales with the ratiometric supply reference voltage (VREF pin) - Temperature-stable quiescent output voltage and sensitivity - Wide ambient temperature range: - 20°C to 85°C - ESD protection greater than 3 k V - Solid-state reliability - Preset sensitivity and offset at final test PACKAGE: 6-pin MLP/DFN (suffix EH) Approximate footprint DESCRIPTION The A139x family of linear Hall-effect sensor integrated circuits (ICs) provide a voltage output that is directly proportional to an applied magnetic field. Before amplification, the sensitivity of typical Hall-effect ICs (measured in m V/G) is directly proportional to the current flowing through the Hall-effect transducer element inside the ICs. In many applications, it is difficult to achieve sufficient sensitivity levels with a Hall-effect sensor IC without consuming more than 3 m A of current. The A139x minimize current consumption to less than 25 µA through the addition of a user-selectable sleep mode. This makes these devices perfect for battery-operated applications such as: cellular phones, digital cameras, and portable tools. End users can control the current consumption of the A139x by applying a logic level signal to the SLEEP pin. The outputs of the devices are not valid (highimpedance mode) during sleep mode. The high-impedance output feature allows the connection of multiple A139x Hall-effect devices to a single A-to-D converter input. The quiescent output voltage of these devices is 50% nominal of the ratiometric supply reference voltage applied to the VREF pin of the device. The output voltage of the device is not ratiometric with respect to the SUPPLY pin. Continued on the next...