Features and Benefits                                                         Description
? Continuous-time operation                                                   The Allegro(R) A1101-A1104 and A1106 Hall-effect switches
    ?Fast power-on time                                                       are   next   generation   replacements   for   the   popular   Allegro
    ? Low noise                                                               312x and 314x lines of unipolar switches. The A110x family,
? Stable operation over full operating temperature range                     produced with BiCMOS technology, consists of devices that
? Reverse battery protection                                                  feature fast power-on time and low-noise operation. Device
? Solid-state reliability                                                    programming is performed after packaging, to ensure increased
? Factory-programmed at end-of-line for optimum                               switchpoint accuracy by eliminating offsets that can be induced
    performance                                                              by package stress. Unique Hall element geometries and low-
? Robust EMC performance                                                      offset   amplifiers   help   to   minimize   noise   and   to   reduce   the
? High *D rating                                                            residual offset voltage normally caused by device overmolding,
? Regulator stability without a b** capacitor                             temperature excursions, and thermal stress.

                                                                              The A1101-A1104   and A1106   Hall-effect   switches   include
                                                                             the   following   on   a   single   silicon   chip:   voltage   regulator,
                                                                             Hall-voltage       generator,    *all-signal     amplifier,    Schmitt
Packages: 3 pin SOT23W (suffix LH), and                                      trigger, and NMOS output transistor. The integrated voltage
3 pin SIP (suffix UA)                                                        regulator permits operation from 3.8 to 24 V. The extensive
                                                                              on-board protection circuitry makes possible a ±30 V absolute
                                                                             maximum voltage rating for *ior protection in automotive
                                                                              and industrial motor commutation applications, without adding

                                                                              Continued on the next page…

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