A3282 Datasheet | Allegro MicroSystems

Features and Benefits - Chopper stabilization ▫ Superior temperature stability ▫ Extremely low switchpoint drift ▫ Insensitive to physical stress - Reverse battery protection - Output short circuit protection - Solid state reliability - Small size - Robust EMC capability - High ESD ratings (HBM) Description The A3282 Hall-effect sensor is a temperature stable, stressresistant latch. Superior high-temperature performance is made possible through an Allegro® patented dynamic offset cancellation that utilizes chopper-stabilization. This method reduces the offset voltage normally caused by device overmolding, temperature dependencies, and thermal stress. The A3282 plements the current Allegro family of chopperstabilized latching sensors. The A3282 includes the following on a single silicon chip: voltage regulator, Hall-voltage generator, small-signal amplifier, chopper stabilization, Schmitt trigger, and a short circuit protected open-drain output. Advanced Bi CMOS wafer fabrication processing is used to take advantage of low-voltage requirements, ponent matching, very low input-offset errors, and small ponent geometries. Packages: 3 pin SOT23W (suffix LH), and 3 pin SIP (suffix UA) This device requires the presence of both south and north polarity magnetic fields for operation. In the presence of a south polarity field of sufficient strength, the device output latches on, and only switches off when a north polarity field of sufficient strength is present. .. Continued on the next page… Not to scale Functional Block Diagram Regulator To All Subcircuits Sample and Hold Dynamic Offset Cancellation Low-Pass Filter VOUT Amp Control Current Limit <1Ω A3282-DS, Rev. 3 Chopper-Stabilized Hall Effect Latch LH is an SOT23-W, a miniature low-profile surface-mount package, while package UA is a three-lead ultramini SIP for through-hole mounting. Each package is available in a lead (Pb) free version, with 100% matte tin plated leadframes. Description (...