Product Brief High Sensitivity Micropower Omnipolar Hall-Effect Switch Description AH9248 Parametric Table The AH9248 is an ultra-sensitive Hall-effect switch with digital latched output, mainly designed for battery-operation, hand-held equipments. Supply Voltage (V) Special CMOS process is used for low-voltage and low-power requirement. A chopper stabilized amplifier improves stability of magnetic switch points. A sleep-awake logic controls the IC in sleep time or awake time. This function will reduce the average operating current of the IC. During the awake time, the output is changed with the magnetic flux density. During the sleep time, the output is latched in its previous state and the current consumption will reduce to some µA. The IC switching behaviour is omnipolar, either north or south pole sufficient strength will turn the output on. If the magnetic flux density is larger than operating point (BOP), the output will be turned on; if it is less than releasing point (BRP), the output will be turned off. 2.5 to 5.5 Supply Current (Average) (µA) 10 Output Saturation Voltage (VCC=3V, IOUT=1mA) (V) (Max) 0.4 Operating Point (Gauss) ±30 Releasing Point (Gauss) ±20 Hysteresis (Gauss) 10 Benefits • • • The AH9248 is available in TO-92S-3, SOT-23-3 and DFN-2×2-3 packages which are optimized for most applications. • • Low Average Current (8µA Typ.) High Sensitivity High Stability of the Magnetic Switching Points Operation Low to 2.5V Cost-effect Solution Features • • • • • • • Micropower Operation 2.5 to 5.5V Power Supply Switching for Both Poles of a Magnet (Omnipolar) Stabilized Chopper Superior Temperature Stability Digital Output Signal Built-in Pull-up Resistor (AH9249) Additional Available Materials • • • • Samples Preliminary Datasheet Reliability Report ESD Report Applications • • • Cover Switch in Notebook PC/PDA Handheld Wireless Application Awake Switch Magnet Switch in Low Duty Cycle Applications May. 2010 BCD Semiconductor Manufacturing Limited 1 Product Brief High Sensitivity Micropower Omnipolar Hall-Effect Switch AH9248 Pin Configuration OUTPUT 2 GND 1 VCC 2 3 OUTPUT 1 SOT-23-3 VCC 3 TO-92S-3 GND (Front View) (Top View) Pin 1 Dot by Marking VCC DFN-2×2-3 1 3 OUTPUT GND 2 (Top View) Ordering Information Example Package Temperature Range Part Number Marking ID Packing Type AH9248Z3-G1 9248 Bulk AH9248Z3TR-G1 9248 Ammo AH9248NTR-G1 GL1 Tape & Reel AH9248DNTR-G1 JA Tape & Reel TO-92S-3 -40 to 85°C SOT-23-3 DFN-2×2-3 Detailed information please refer to the relevant datasheet. Sales Office: Shanghai No. 1600, Zi Xing Road, Shanghai ZiZhu Science-based Industrial Park, 200241, China Tel : 86-21-24162266 Fax : 86-21-24162277 USA 30920 Huntwood Ave. Hayward, CA 94544, USA Tel : +1-510-324-2988 Fax : +1-510-324-2788 Taiwan 4F, 298-1 Rui Guang Road, Nei-Hu District, Taipei, Taiwan Tel : 886-2-2656-2808 Fax : 886-2-2656-2806 Shenzhen Unit A Room 1203, Skyworth Bldg., Gaoxin Ave.1.S., Nanshan District, Shenzhen, China Tel : 86-755-8826 7951 Fax : 86-755-8826 7865 May. 2010 BCD Semiconductor Manufacturing Limited 2