Electronics Weekly
The A132X family of linear Hall-effect sensors from Allegro MicroSystems Europe are temperature stable linear Hall-effect sensors which provide a voltage output that is proportional to the applied magnetic field.
Featuring a proprietary chopper stabilisation technique which produces optimised offset characteristics, these ratiometric linear devices offer a quiescent output voltage that is 50% of the supply voltage and nominal output sensitivity options of 2.5mV/Gs, 3.125mV/Gs, and 5mV/Gs.
With these characteristics the devices should be suitable for use in linear and rotary position sensing systems in the harsh environments typically encountered in automotive and industrial applications over the temperature range from -40 to +150°C.
Each device consists of a BiCMOS monolithic circuit which integrates a Hall element, temperature-compensating circuitry to reduce the intrinsic sensitivity drift of the Hall element, a small-signal high-gain amplifier, and a rail-to-rail low-impedance output stage. The devices are designed for 4.5-5.5V operation, and have built-in EMC protection.
A proprietary dynamic offset cancellation technique, with an internal high-frequency clock, reduces the residual offset voltage normally caused by device overmoulding, temperature dependencies, and thermal stress. The high-frequency clock allows for a greater sampling frequency, which produces higher accuracy and faster signal processing capability.
The range includes both 3-pin SOT and single-inline surface-mount packages covering industrial and automotive temperature ranges.
00 33 450 512359
www.allegromicro.com
