A3212EUA-T

The A3212 series integrated circuits are ultrasensitive, pole independent Hall-effect switches with latched digital output. These devices are especially suited for operation in battery operated, hand-held equipment such as cellular and cordless telephones, pagers, and palmtop computers. A 2.5 to 3.5 V operation and a unique clocking scheme reduce the average operating power requirements to less than 15 µW with a 2.75 V supply.Unlike other Hall-effect switches, either a north or south pole of sufficient strength will turn the output on in the A3212, and in the absence of a magnetic field, the output is off.This device includes on a single silicon chip a Hall-voltage generator, small-signal amplifier, chopper stabilization, a latch, and a MOSFET output. Advanced CMOS processing is used to take advantage of low-voltage and low-power requirements, component matching, very low input-offset errors, and small component geometries.

• AEC-Q100 automotive qualified
• Micropower operation
• Operation with north or south pole
• 2.5 to 3.5 V battery operation
• Chopper stabilized
  • Superior temperature stability
  • Extremely low switchpoint drift
  • Insensitive to physical stress
• High ESD protection
• Solid-state reliability
• Small size
• Easily manufacturable with magnet pole independence
• Temperature: -40°C to 85°C (E series) and -40°C to 150°C (L series)