AX8111

AX8111 MicroPower, Ultra-sensitive Hall Effect Switch  GENERAL DESCRIPTION AX8111 is a three-terminal Hall Effect sensor device with an output driver, mainly designed for battery–operation, hand-held equipment (such as Cellular and Cordless Phone, PDA). For AX8111, the total operation power is down to 10uW in the 1.8V supply. The output is switch with either north or South Pole of sufficient strength will turn the output on. The output will be turned off under no magnetic field. While the magnetic flux density (B) is larger than operate point (Bop), the output will be turned on (low); the output is latched until B is lower than release point (Brp) and then turned off.  FEATURES  Micro Power Operation for Battery Applications 1.65V to 3.30V battery operation Chopper Stabilized Technology yÑb€ Pole Operation with North or South R ` w Good RF noise immunity VÛm om c . High sensitivity and high stability of the magnetic switching points ech w w BLOCK DIAGRAM VDD f 3-pin Thin TSOT23, UDFN .go and SOT553 Package w ot Awake/Sleep Timing Control P-MOS Hall Plate Logic Offset Cancellation OUT N-MOS + GND 1/9 Axelite Confidential Materials, do not copy or distribute without written consent . Rev.1.1 Aug.24, 2012 AX8111  PIN ASSIGNMET The packages of AX8111 are TSOT23-3L, UDFN-3L and SOT553; the pin assignment is given by: GND 2 GND 3 TSOT23-3L 1 3 UDFN-3L 2X2 1 2 VDD OUT VDD OUT (TOP VIEW) (TOP VIEW) (Top View) NC GND NC 1 2 3 SOT553 4 VDD 5 Output Name De...