NOT RECOMMENDED FOR NEW DESIGN USE AH1808 AH1801 MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH Description Pin Assignments AH1801 is a Micropower, Ultra-sensitive Hall Effect Switch, which is with two Hall effect plates and a output driver, mainly designed for batteryoperation, hand-held equipment (such as Cellular and ( Top View ) Cordless Phone, PDA). The total operation power is down to 24W in the 3V supply. 2. Output GND 3. Either north or south pole of sufficient strength will turn the output off. 1. VDD The output will be turned on under no magnetic field. SC59 While the magnetic flux density (B) is larger than operate point (Bop), the output will be turned off, the output is held until B is lower than ( Top View ) release point (Brp), then turned on. ( Top View ) 6. NC 5. GND 4. NC 3. GND Features Micropower Operation Operation with North or South Pole 2.5V to 5.5V Battery Operation Inverted Output-on without Magnet Present 1. VDD 3. Output 1. VDD 2. NC 3. Output Chopper Stabilized Superior Temperature Stability DFN2020-3 DFN2020-6 Extremely Low Switch-Point Drift Insensitive to Physical Stress Good RF Noise Immunity -40C to +85C Operating Temperature Low Profile 3 Pin SC59 (Commonly Known as SOT23 in Asia) and DFN2020-3, DFN2020-6 Packages Applications ESD (HBM) 5KV for DFN2020-3 and DFN2020-6 6KV for SC59 Cellular Phone SC59, DFN2020-3 and DFN2020-6: Available in Green PDA Molding Compound (No Br, Sb) Cordless Phone 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) & 2015/863/EU (RoHS 3) compliant. 2. See Offset Offset Cancelling Cancelling NOT RECOMMENDED FOR NEW DESIGN USE AH1808 AH1801 Pin Descriptions Pin Name P/I/O Description VDD P/I Power Supply Input GND P/I Ground Output O Output Pin NC No Connected Functional Block Diagram VDD 1 Power switch Hall Plate Output Amp Latch 3 GND Logical 2 Hall Plate Amp Latch Absolute Maximum Ratings ( T = +25C, unless otherwise specified.) A Symbol Parameter Rating Unit Supply Voltage 7 V VDD B Magnetic Flux Density Unlimited Storage Temperature Range -65 to +150 C TS SC59 DFN2020-3 Package Power Dissipation 230 mW PD DFN2020-6 Maximum Junction Temperature +150 C TJ Recommended Operating Conditions ( TA = +25C, unless otherwise specified.) Symbol Parameter Conditions Rating Unit V Supply Voltage Operating 2.5 to 5.5 V DD Operating Temperature Range Operating -40 to +85 C T A 2 of 10 AH1801 April 2018 Diodes Incorporated www.diodes.com Document number: DS31110 Rev. 8 - 3