SEN-14709 SparkFun

AH1815 LOW SENSITIVITY MICROPOWER OMNIPOLAR HALL-EFFECT SWITCH Description Pin Assignments The AH1815 is a low-sensitivity, micro-power Omnipolar Hall effect switch IC, designed for portable and battery powered consumer (Top View) equipment for home appliance and industrial applications such as smart-meter magnetic-tamper detection. Based on two sensitive Hall effect plates and a chopper-stabilized architecture, the AH1815 3 OUTPUT provides a reliable solution over the whole operating range. To support portable and battery powered equipment, the design has GND 2 been optimized to operate over the supply range of 2.5V to 5.5V and 1 V DD consumes only 24W with a supply of 3V. The single open drain output can switch on with either a north or SC59 south pole of sufficient strength. When the magnetic flux density (B) perpendicular to the package is larger than operating point (Bop) the (Top View) output is switched on (pulled low). The output is turned off when B becomes lower than the releasing point (Brp). The output will 1 5 OUTPUT NC remain off when there is no magnetic field. 2 GND 3 4 Features NC V DD Omnipolar (North or South pole) Operation SOT553 Low Sensitivity Single Open Drain Output Micropower Operation (Front View) 2.5V to 5.5V Operating Range Chopper Stabilized Design Provides 3. OUTPUT Superior Temperature Stability 2. GND Minimal Switch Point Drift V 1. DD Enhanced Immunity to Stress Good RF Noise Immunity SIP-3 -40C to +125C Operating Temperature ESD (HBM) > 6KV Small Low Profile SOT553 and Industry Standard SC59 and Applications SIP-3 Packages Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Doors, Lids, Covers and Tray Position Detect Switches Halogen and Antimony Free. Green Device (Note 3 ) Display Switch for Portable PCs and Tablets On/Off Switch for PDAs and Digital Cameras Liquid Level Detection for Coffee Machines Smart Meters Position, Proximity and Level Detection Contactless Switch in Battery Powered Consumer, Home Appliances and Industrial Applications Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See Offset Offset Cancellation Cancellation AH1815 Typical Applications Circuit (Note 4) 2.5V to 5.5V V DD R L OUTPUT AH1815 C IN GND Note: 4. C is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 10nF to 100nF. IN R is the pull-up resistor, the recommended resistance is 10k to 100k. L Pin Descriptions Packages: SC59 and SIP-3 Pin Pin Function Number Name 1 V Power Supply Input DD 2 GND Ground 3 OUTPUT Output Package: SOT553 Pin Pin Function Number Name 1 NC No Connection (Note 5) 2 GND Ground 3 NC No Connection (Note 5) 4 V Power Supply Input DD 5 OUTPUT Output Note: 5. NC is No Connection pin and is not connected internally. This pin can be left open or tied to gro und. Functional Block Diagram V DD Sleep/Awake Logic and Power Switch Hall Plate Latch Amp OUTPUT Output Driver GND Controller Hall Plate Amp Latch 2 of 13 AH1815 September 2015 Diodes Incorporated www.diodes.com Document number: DS37970 Rev. 2 - 2