A3212ELHLT-T Datasheet PDF - Allegro MicroSystems

●The A3212ELHLT-T is a micropower ultra sensitive hall effect switch with latched digital output in 3 pin SOT2-3 package. Improved stability is made possible through chopper stabilization (dynamic offset cancellation) which reduces residual offset voltage normally caused by device over moulding, temperature dependencies and thermal stress. A 2.5V to 3.5V operation and unique clocking scheme reduce the average operating power requirements to less than 15µW with 2.75V supply. The A3212ELHLT-T includes hall voltage generator, small signal amplifier, chopper stabilization, latch and MOSFET output on a single silicon chip. 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.

● Small size, solid state reliability

● Supply current (IDD(AVG)) of 5.1µA at VDD = 2.75V

● 0.1% duty cycle

● Chopping frequency (fc) is 340KHz

● Superior temperature stability

● Extremely low switchpoint drift

● Insensitive to physical stress

● High ESD protection

● Easily assembly into applications due to magnetic pole independence

● Operating ambient temperature range from -40°C to 85°C