AH1388 ULTRA SENSITIVE DUAL OUTPUT UNIPOLAR HALL EFFECT SWITCH Description Pin Assignments The AH1388 is a miniature micropower magnetic Unipolar Hall effect switch IC with dual outputs specifically designed for portable and battery powered consumer equipment to home appliances and industrial (Top View) applications. To support battery powered equipment and low voltage microcontrollers, the AH1388 can operate over the supply range of 1.6V V DD Output1 (North-Pole) to 3.6V and uses a sleep function to give an average supply current of 1 4 only 12A at 1.85V. To minimize PCB space, the AH1388 is packaged in small low profile X2-DFN1410-4. A North pole of sufficient strength will turn Output1 on and a South pole of sufficient strength will turn on Output2. The Output1 is turned on (pulled 2 3 low) when the magnetic flux density (B), perpendicular to the part marking surface, falls below North field operate point B (-17G typical). OPN Output2 (South-Pole) GND The Output1 is held low until B rises above the North field release point B (-11G typical). Similarly, the Output2 will operate (pulled low) when RPN X2-DFN1410-4 B to the part marking surface rises above South field operate point B OPS (17G typical) and is held low until B falls below the South field release point B (11G typical). RPS Applications Features Smart Cover or Dock Detect for Cellular Phones and Tablet Two Monolithic Unipolar Hall Switches Position Detect for Digital Still, Video Cameras and Handheld Operation with a North Pole (Output1) to Part Marking Surface Gaming Consoles Operation with a South Pole (Output2) to Part Marking Surface Door, Lids and Tray Position Detect Switches Home Appliances Supply Voltage of 1.6V to 3.6V and Industrial Applications Micropower Operation Level, Proximity and Position Switches Dual Outputs for Independent Pole Detection for Design Flexibility Contact-Less Switches in Home Appliances and Industrial Internal Pull-Up and Pull-Down Capability Applications Chopper Stabilized Design Superior Temperature Stability Extremely Low Switch-Point Drift Insensitive to Physical Stress Good RF Noise Immunity Operating Temperature Range: -40C to +85C 1.5kV ESD on Supply and Output Pins Small Low Profile: X2-DFN1410-4 Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Device (Note 3) For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. Offset Cancellation AH1388 Typical Applications Circuit (Note 4) GND V DD C IN AH1388 Output1 Output2 (South-Pole) (North-Pole) Note: 4. CIN is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 100nF typical and should be placed as close to the supply pin as possible. Pin Descriptions Package: X2-DFN1410-4 Pin Number Pin Name Function 1 V Power Supply Input DD 2 GND Ground Pin 3 Output2 Output Pin (South-Pole) 4 Output1 Output Pin (North-Pole) Pad Pad The center exposed pad should be tied to the GND or floating no connection internally. Functional Block Diagram V DD 1 Sleep/Awake Logic and Power Switch 4 Output1 Latch (North-Pole) and Hall Output GND Plate Driver V Amp DD Controller 3 Output2 (South-Pole) 2 GND 2 of 9 AH1388 May 2020 Diodes Incorporated www.diodes.com Document number: DS42736 Rev. 1 - 2