Allegro MicroSystems A1221
The A1220, A1221, A1222, and A1223 Hall-effect sensor ICs are extremely temperature-stable and stress-resistant devices especially suited for operation over extended temperature ranges to 150°C. Each device includes on a single silicon chip a voltage regulator, Hallvoltage generator, small-signal amplifier, chopper stabilization, Schmitt trigger, and a short-circuit protected open-drain output to sink up to 25 mA.| Part No. | A1221 |
|---|---|
| Datasheet | A1221 Download |
| Manufacturer |  Allegro MicroSystems |
| Description | Chopper-Stabilized Precision Hall-Effect Latches |
| Buy | Stock & Price |
FEATURES AND BENEFITS
● AEC-Q100 automotive qualified● Quality Managed (QM)
● Symmetrical latch switch points
● Resistant to physical stress
● Superior temperature stability
● Output short-circuit protection
● Operation from unregulated supply down to 3 V
● Reverse-battery protection
● Solid-state reliability
● Small package sizes PACKAGES: Not to scale 3-pin SOT23W (suffix LH) NOT FOR NEW DESIGN 3-pin SIP, matrix HD style (suffix UA) 3-pin SIP, chopper style (suffix UA)
DESCRIPTION
Superior high-temperature performance is made possible through dynamic offset cancellation, which reduces the residual offset voltage normally caused by device overmolding, temperature dependencies, and thermal stress. A south pole of sufficient strength turns the output on. A north pole of sufficient strength is necessary to turn the output off. An onboard regulator permits operation with supply voltages of 3 to 24 V. The advantage of operating down to 3 V is that the device can be used in 3 V applications or with additional Continued on next page...
