Description
Allegro MicroSystems A3214ELHLT-T Hall Effect Sensor 1mA Latch 3V 3-Pin SOT-23W T/R
The A3214 integrated circuits are ultra-sensitive, pole-independent Hall-effect switches with a latched digital output. They are especially suited for operation in battery operated, hand-held equipment such as cell and cordless telephones and palmtop computers. A 2.4 to 5.5 V operation and a unique clocking scheme reduce the average operating power requirements to 14 µW (typical, at 2.75 V).Unlike other Hall-effect switches, either a north or south pole of sufficient strength will turn the output on; in the absence of a magnetic field, the output is off. The polarity independence and minimal power requirement allows these devices to easily replace reed switches for superior reliability and ease of manufacturing, while eliminating the requirement for signal conditioning.These devices include, on a single silicon chip, a Hall-voltage generator, small-signal amplifier, chopper stabilization, a latch, and a MOSFET output. Advanced BiCMOS processing is used to take advantage of low-voltage and low-power requirements, component matching, very low input-offset errors, and small component geometries
TYPE DESCRIPTION SELECT ALL
Categories Sensors, Transducers
Magnetic Sensors – Switches (Solid State)
Manufacturer Allegro MicroSystems
Packaging Cut Tape (CT)
Function Omnipolar Switch
Technology Hall Effect
Polarization North Pole, South Pole
Sensing Range ±7mT Trip, ±1mT Release
Test Condition -40°C ~ 85°C
Voltage – Supply 2.4V ~ 5.5V
Current – Supply (Max) 2mA
Current – Output (Max) 1mA
Output Type Open Drain
Operating Temperature -40°C ~ 85°C (TA)
Mounting Type Surface Mount
Supplier Device Package SOT-23W
Package / Case SOT-23W
Manufacturer Part Number: A3214ELHLT-T
Allegro
