ah1889 document number: ds36256 rev. 1 - 2 1 of 7 www.diodes.com april 2013 ? diodes incorporated new product a h1889 high sensivity dual unipolar hall-effect switch description ah1889 is a high sensitivity dual output unipolar hall effect ic which can detect either a north or south pole independently and switch one of its two outputs with internal pull up and pull down capability. the ah1889 is mainly designed for low voltage applications which require a quick response time and can operate over the supply voltage of 1.65v to 3.6v. to minimize pcb space ah1889 outputs have internal pull up and pull down capability and is packaged in a small low profile sot553 package. a south pole of sufficient strength will turn output1 on and a north pole of sufficient strength with turn on output2. while the magnetic flux density (b) perpendicular to the package is larger than operate point bops or bopn, the appropriate output will be turned on (pulled low), the output is held until b is lower than release point brps or brps, then turned off (high). the outputs will be turned off and will remain off when there is no magnetic field. features ? two monolithic unipolar hall effect sensor switch ? operation with a south pole (output1) ? operation with a north pole (output2) ? supply voltage of 1.65v to 3.6v ? quick response time without sleep mode ? chopper stabilized design provides: ? superior temperature stability ? extremely low switch-point drift ? enhanced immunity to physical stress ? good rf noise immunity ? -40c to +85c operating temperature ? esd (human body model) >4kv ? small and low profile sot553 package ? totally lead-free & fully rohs compliant (notes 1 & 2) ? halogen and antimony free. ?green? device (note 3) pin assignments (top view) sot553 applications ? position and proximity detection fo r consumer, office equipments and industrial applications ? open and close detect swit ches for home appliances ? door, lids, tray position detect switches ? magnetic field direction detection ? contact-less switches for cons umer and industrial applications notes: 1. no purposely added lead. fully eu directiv e 2002/95/ec (rohs) & 2011/6 5/eu (rohs 2) compliant. 2. see http://www.diodes.com/quality/lead_free.html for more in formation about diodes incorporated?s definitions of halogen- a nd antimony-free, "green" and lead-free. 3. halogen- and antimony-free "green? products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total br + cl) and <1000ppm antimony compounds. typical applications circuit note: 4. c in is for power stabilization and to strengthen the noi se immunity, the recommended capacitance 100nf typical.
ah1889 document number: ds36256 rev. 1 - 2 2 of 7 www.diodes.com april 2013 ? diodes incorporated new product a h1889 pin descriptions package: sot553 pin number pin name function 1 output2 north pole setecting output pin (active low) 2 gnd ground 3 nc no connection (note 5) 4 v dd power supply voltage 5 output1 south pole detecting output pin (active low) note: 5. nc is ?no connection? pin and is not connected internally. this pin can be left open or tied to ground. functional block diagram offset cancelling offset cancelling absolute maximum ratings (note 6) (@t a = +25c, unless otherwise specified.) symbol characteristics values unit v dd supply voltage (note 7) 5 v v dd_rev reverse supply voltage -0.3 v i output output current (source and sink) 1 ma b magnetic flux density unlimited p d package power dissipation sot553 230 mw ts storage temperature range -65 to +150 ? c t j maximum junction temperature 150 ? c esd human body model esd capability 4 kv notes: 6. stresses greater than the 'absolute maximum ratings' specified above may cause permanent damage to the device. these are stress ratings only; functional operation of t he device at these or any other conditions exceeding those indicated in this specification is not implied. device reliability may be affected by exposure to absolute maximum rating conditions for extended periods of time. 7. the absolute maximum v dd of 6v is a transient stress rating and is not meant as a f unctional operating condition. it is not recommended to operate the device at the absolute maximum rated conditions for any period of time.
ah1889 document number: ds36256 rev. 1 - 2 3 of 7 www.diodes.com april 2013 ? diodes incorporated new product a h1889 recommended operating conditions (@t a = +25c, unless otherwise specified.) symbol characteristic conditions rating unit v dd supply voltage operating 1.65 to 3.6 v t a operating temperature range operating -40 to +85 c electrical characteristics (note 8) (@t a = +25c, v dd = 1.8v, unless otherwise specified.) symbol characteristic conditions min typ max unit v oh output1 and output2 high voltage (off) i out = -0.5ma v dd -0.2 ? ? v v ol output1 and output2 low voltage (on) i out = 0.5ma ? 0.1 0.2 v i dd supply current v dd = 1.8v outputs off ? 2.1 ? ma v dd = 3.6v outputs off ? 5 ? ma note: 8. when power is initially turned on, the operating v dd (1.65v to 3.6v) must be applied to guaranteed the output. magnetic characteristics (note 9, 10, 11) (@t a = +25c, v dd = 1.8v, unless otherwise specified.) (1mt=10 gauss) output symbol characteristic min typ max unit output1 bops (south pole to part marking side) operation point ? 35 50 gauss brps (south pole to part ma rking side) release point 6 20 ? output2 bopn (north pole to part marking side) operation point -50 -35 ? brpn (north pole to part ma rking side) release point ? -20 -6 bhy (|bopx|-|brpx|) hysteresis ? 8 ? notes: 9. typical data is at t a = +25c, v dd = 3v, and for design information only. 10. bops and brps for output1 pin responds to south pole onl y; bopn and brpn for output2 pin responds to north pole only. 11. magnetic characteristics may vary with operating temperature and after soldering. ( output voltage ) ( output voltage )
ah1889 document number: ds36256 rev. 1 - 2 4 of 7 www.diodes.com april 2013 ? diodes incorporated new product a h1889 typical operating characteristics -50 -40 -30 -20 -10 0 10 20 30 40 50 -50 -25 0 25 50 75 100 gauss (g) temperature ( c) switch points vs temperature v dd = 1.8v brpn bops bopn brps bhy -50 -40 -30 -20 -10 0 10 20 30 40 50 -50 -25 0 25 50 75 100 gauss (g) temperature ( c) switch points vs temperature v dd = 3.0v brpn bops bopn brps bhy -50 -40 -30 -20 -10 0 10 20 30 40 50 -50 -25 0 25 50 75 100 gauss (g) temperature ( c) switch points vs temperature v dd = 3.3v brpn bops bopn brps bhy -50 -40 -30 -20 -10 0 10 20 30 40 50 1.5 1.8 2.1 2.4 2.7 3 3.3 3.6 3.9 gauss (g) supply voltage (v) switch points vs supply voltage t a = +25 c brpn bops bopn brps bhy 0 1 2 3 4 5 6 7 8 9 10 -50 -25 0 25 50 75 100 supply current idd (ma) temperature (c) supply current vs. temperature 3.6v 1.8v 1.65v 0 1 2 3 4 5 6 7 8 9 10 1.5 1.8 2.1 2.4 2.7 3 3.3 3.6 3.9 supply current i dd (ma) supply voltage (v) supply current vs. supply voltage t a = +25 c
ah1889 document number: ds36256 rev. 1 - 2 5 of 7 www.diodes.com april 2013 ? diodes incorporated new product a h1889 thermal performance characteristics t a ( ? c) 25 50 60 70 80 85 90 100 110 120 130 140 150 p d (mw) 230 184 166 147 129 120 110 92 74 55 37 18 0 0 100 200 300 0 25 50 75 100 125 150 power dissipation, p d (mw) ambient temperature t a (c) power dissipation curve -40 -40 -40 -40 ss 85 ordering information part number package code packaging 7? tape and reel quantity part number suffix AH1889-Z-7 z sot553 3000/tape & reel -7 marking information (1) package type: sot553 part number package identification code ah1889 sot553 kx
ah1889 document number: ds36256 rev. 1 - 2 6 of 7 www.diodes.com april 2013 ? diodes incorporated new product a h1889 package outline dimensions (all dimensions in mm.) please see ap02002 at http://www.diodes.com /datasheets/ap02002.pdf for latest version. (1) package type: sot553 0.55/0.70 0.10/0.18 0.23/0.37 sensor location suggested pad layout please see ap02001 at http://www.diodes.com/dat asheets/ap02001.pdf for the latest version. (1) package type: sot553 sot553 dim min max typ a 0.55 0.62 0.60 b 0.15 0.30 0.20 c 0.10 0.18 0.15 d 1.50 1.70 1.60 e 1.55 1.70 1.60 e1 1.10 1.25 1.20 e 0.50 bsc e1 1.00 bsc f 0.00 0.10 ?? l 0.10 0.30 0.20 a 6 8 7 all dimensions in mm dimensions value (in mm) z 2.2 g 1.2 x 0.375 y 0.5 c1 1.7 c2 0.5 e1/2 e1 d typ. r0.1 max. a a e/2 e b (5x) e e1 l (5x) c f 7 typ. x z y c1 c2 c2 g
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