AH1892-CD4-7 Diodes Incorporated

AH1892 PROGRAMMABLE MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR SWITCH Description Pin Assignments The AH1892 is a micropower magnetic range selectable (Bop/Brp) Omnipolar Hall effect switch IC with internal pull up and pull down capability, designed for consumer equipment ranging from portable and battery powered cellular phones and portable PCs to home appliances and industrial applications. To support battery powered equipment and low voltage microcontrollers, the AH1892 can operate over the supply range of 1.6V to 3.6V and uses a hibernating clocking system to minimize the power consumption. The average supply current is only 4.3A typical at 1.80V. Due to the application diversity, the AH1892 has an 8kV ESD rating on the supply and output pins. To minimize PCB space the AH1892 is packaged in the small CSP package (0.71mm x 0.71mm) or SOT553 leaded package U-WLB0707-4 The output is activated with either a north or south pole of sufficient magnetic field strength. The user can select one of two magnetic sensitivity bands via the BSEL pin without the addition of any external components allowing a flexible but small solution. The band select can be hardwired or be changed on the fly via a logic source such as a micro-controller. When the magnetic flux density (B) is larger than operate point (Bop), the output will be turned on (pulled low) and held until B is lower than release point (Brp). SOT553 Features Omnipolar operation (North or South pole) Programmable operate and release points Applications Supply voltage of 1.6V to 3.6V Open and close detect for gaming and cellular phones Micropower operation Holster and dock detect for cellular phones Chopper stabilized design Cover switch in portable and tablet PCs Superior temperature stability Digital still and video cameras Extremely Low Switch-Point Drift Tray, door and covers position detect for printers and scanners Insensitive to Physical Stress Contact-less switch in consumer and industrial products No external pull up resistors required Good RF noise immunity -40 C to +85 C operating temperature 8kV ESD on supply and output pins Miniature U-WLB07070-4 (CSP 0.71mm x 0.71mm typical) and small low profile SOT553 Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Device (Note 3) Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See AH1892 PROGRAMMABLE MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR SWITCH Typical Application Circuit Note : C is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 100nF typical IN Pin Descriptions Package: U-WLB0707-4 Pin Pin Name Description A1 GND Ground A2 OUTPUT Output B1 BSEL Band Select B2 V Power Supply Voltage DD Package: SOT553 Pin Pin Name Description V 1 Power Supply Voltage DD 2 NC No Connection (Note 4) 3 BSEL Band Select 4 GND Ground 5 OUTPUT Output Notes: 4. NC is No Connection pin and is not connected internally. This pin can be left open or connected to ground. Functional Block Diagram 2 of 11 May 2012 AH1892 Diodes Incorporated www.diodes.com Document number: DS35092 Rev. 1 - 2 NEW PRODUCT