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A3212ELHLT-T Description: 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
A3211/2 Micropower, Ultra Sensitive Hall Effect Switches, Allegro Microsystems
A3211/2 Micropower are ultrasensitive, pole independent, Hall-effect switches with latched digital output. Their 2.5 V to 3.5 V operation and unique clocking scheme reduces the average operating power to less than 15 μW with a 2.75 V supply.
Either a north or south pole turns on the output in the A3212 and removing the magnetic field turns the output is off. This is reversed on the A3211.
Chopper stabilisation improves stability which reduces the residual offset voltage normally caused by device overmolding, temperature dependencies, and thermal stress.
Included on the chip is a Hall-voltage generator, small-signal amplifier, chopper stabilisation, a latch, and a MOSFET output.
Applications
Sensing & Instrumentation, Consumer Electronics, Portable Devices
Manufacturer introduction
Allegro MicroSystems, LLC is a leader in developing, manufacturing and marketing high-performance semiconductors. Allegro's innovative solutions serve high-growth applications within the automotive market, with additional focus on office automation, industrial, and consumer/communications solutions. Allegro is headquartered in Worcester, Massachusetts (USA) with design, applications, and sales support centers located worldwide.
Final Thoughts
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Article source: https://article-realm.com/article/Finance/31122-A3212ELHLT-T-Sensors-Transducers.html
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