A1391-DS is the datasheet of A1391 and A1392, it is a micro power 3V linear hall effect sensor with tri-state output and user-selectable sleep mode. This integrated circuit (IC) provides a voltage output that is directly proportional to an applied magnetic field. In many applications, it is difficult to achieve sufficient sensitivity levels with a Hall effect sensor IC without consuming more than 3 mA of current. The A1391 and A1392 minimize current consumption to less than 25 μA through the addition of a user-selectable sleep mode.
The Allegro MicroSystems A1391 and A1392 are Micro Power 3V Linear Hall Effect Sensors with Tri-State Output and User-Selectable Sleep Mode. These integrated circuits provide a voltage output directly proportional to an applied magnetic field while minimizing current consumption to less than 25 µA in sleep mode, making them ideal for battery-operated applications such as cellular phones and digital cameras.
The devices are available in a miniature 6-pin MLP/DFN package and are compatible with 2.5 to 3.5 V power supplies. Key features include a ratiometric output that scales with the VREF pin, temperature-stable quiescent output voltage, and preset sensitivity and offset at final test. The sensors operate over a wide ambient temperature range of -20°C to 85°C.
| Supply Voltage | 2.5 - 3.5 V |
|---|---|
| Nominal Supply Voltage | 3.0 V |
| Operating Ambient Temperature Range | -20°C to 85°C |
| Power Consumption (Active Mode) | 10 mW |
| Power Consumption (Sleep Mode) | Less than 25 µA |
| ESD Protection | Greater than 3 kV |
| Package Type | 6-pin MLP/DFN |
| A1391 Sensitivity (Typical) | 1.25 mV/G |
| A1392 Sensitivity (Typical) | 2.50 mV/G |
The devices are compatible with 2.5 to 3.5 V power supplies.
End users can control current consumption by applying a logic level signal to the SLEEP pin to enter sleep mode.
The outputs are not valid and enter high-impedance mode during sleep mode.
No, the output voltage is not ratiometric with respect to the SUPPLY pin, but it scales with the ratiometric supply reference voltage (VREF pin).