AH1897 document number: ds36470 rev. 1 - 2 1 of 8 www.diodes.com august 2013 ? diodes incorporated new product a h1897 high sensitivity micropower omniploar hall-effect switch description the AH1897 is a high sensitivity micropower omnipolar hall effect switch ic with an internal pull up and pull down capability. designed for portable and battery powered equipment such as cellular phones and portable pcs, the average supply current is only 4.3a at 1.85v. to support portable equipment the AH1897 can operate over the supply range of 1.6v to 3.6v and uses a hibernating clocking system to minimize the power consumpti on. to minimize pcb space the AH1897 is available in a small low profile x1-dfn1216-4 package. the output is activated with either a north or south pole of sufficient magnetic field strength. when the magnetic flux density (b) perpendicular to the package is larger than operate point (bop), the output will be turned on (pulled low). the output is turned off when b becomes lower than the release point (brp). the output will remain off when there is no magnetic field. features ? omnipolar operation (north or south pole) ? supply voltage of 1.6v to 3.6v ? micropower operation ? chopper stabilized design provides: ? superior temperature stability ? minimal switch point drift ? enhanced immunity to physical stress ? no external pull-up resistors required ? good rf noise immunity ? -40c to +85c operating temperature ? small low profile x1-dfn1216-4 package ? totally lead-free & fully rohs compliant (notes 1 & 2) ? halogen and antimony free. ?green? device (note 3) pin assignments (top view) x1-dfn1216-4 applications ? cover or display switch in portable pcs ? open and close detect for cellular phones ? holster or cover detect for cellular phones and tablet pcs ? digital still, video cameras and handheld gaming consoles ? contact-less switches 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 noise immunity, the recommended capa citance is 100nf typical.
AH1897 document number: ds36470 rev. 1 - 2 2 of 8 www.diodes.com august 2013 ? diodes incorporated new product a h1897 pin descriptions package: x1-dfn1216-4 pin number pin name function 1 v dd power supply input 2 gnd ground pin 3 nc no connection (note 5) 4 output output pin note: 5. nc is ?no connection? pin and is not connecte d internally. this pin can be left open or tied to ground. functional block diagram
AH1897 document number: ds36470 rev. 1 - 2 3 of 8 www.diodes.com august 2013 ? diodes incorporated new product a h1897 absolute maximum ratings (note 6) (@t a = +25c, unless otherwise specified.) symbol parameter rating unit v dd supply voltage (note 7) 6 v v dd_rev reverse supply voltage -0.3 v i output output current (source and sink) 3 ma b magnetic flux density unlimited p d package power dissipation x1-dfn1216-4 230 mw ts storage temperature range -65 to +150 c t j maximum junction temperature 150 c esd hbm human body model (hmb) esd capability 8 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 the 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 functional operating condition. it is not recommended to operate the device at the absolute maximum rated conditions for any period of time. recommended operating conditions (@t a = +25c, unless otherwise specified.) symbol parameter conditions rating unit v dd supply voltage operating 1.6v to 3.6v v t a operating temperature range operating -40 to +85 ? c electrical characteristics (@t a = +25c, v dd = 3.0v, unless otherwise specified.) symbol parameter conditions min typ max unit v ol output low voltage (on) i out = 1ma ? 0.1 0.2 v v oh output high voltage (off) i out = -1ma v dd -0.2 v dd -0.1 ? v ioff output leakage current v out = 3.6v, output off ? < 0.1 1 a i dd (awake) supply current during ?awake? period, ? 2.1 ? ma i dd (sleep) during ?sleep? period, ? 2.5 ? ma i dd (avg) average supply current t a = +25c, v dd = 1.8v ? 4.3 8 a t a = +25c, v dd = 3.6v ? 7.2 13 a tawake awake time (note 8) ? 50 100 s tperiod period (note 8) ? 50 100 ms d.c. duty cycle ? 0.1 ? % note: 8. when power is initially turned on, the operating v dd (1.6v to 3.6v) must be applied to guaranteed the output sampling. the output state is valid after the second operating cycle (typical 100ms).
AH1897 document number: ds36470 rev. 1 - 2 4 of 8 www.diodes.com august 2013 ? diodes incorporated new product a h1897 magnetic characteristics (t a = +25c, v dd = 3.0v, unless otherwise specified) (1mt=10 gauss) symbol characteristics min typ max unit bops (south pole to part marking side) operation point 14 30 40 gauss bopn (north pole to part marking side) -40 -30 -14 brps (south pole to part marking side) release point 10 20 35 brpn (north pole to part marking side) -35 -20 -10 bhy (|bopx|-|brpx|) hysteresis - 10 -
AH1897 document number: ds36470 rev. 1 - 2 5 of 8 www.diodes.com august 2013 ? diodes incorporated new product a h1897 typical operating characteristics -60 -40 -20 0 20 40 60 -50-250 255075100 gauss (g) temperature ( c) switch points vs temperature v dd = 1.6v brpn bops bopn brps bhy -60 -40 -20 0 20 40 60 -50-25 0 255075100 gauss (g) temperature ( c) switch points vs temperature v dd = 3.0v brpn bops bopn bhy brps -60 -40 -20 0 20 40 60 -50 -25 0 25 50 75 100 gauss (g) temperature ( c) switch points vs temperature v dd = 3.6v brpn bops bopn bhy brps -60 -40 -20 0 20 40 60 1.51.82.12.42.7 3 3.33.63.9 gauss (g) supply voltage (v) switch points vs supply voltage brpn bops bhy t a = +25 c bopn brps 0 1 2 3 4 5 6 7 8 9 10 -50 -25 0 25 50 75 100 average supply current i dd ( a) temperature (c) average supply current vs. temperature 3.3v 1.6v 3.6v 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 average supply current i dd ( a) supply voltage (v) average supply current vs. supply voltage t a = +25 c
AH1897 document number: ds36470 rev. 1 - 2 6 of 8 www.diodes.com august 2013 ? diodes incorporated new product a h1897 ordering information part number package code packaging 7? tape and reel quantity part number suffix AH1897-fa-7 fa x1-dfn1216-4 3000/tape & reel -7 marking information (1) package type: x1-dfn1216-4 part number package identification code AH1897-fa-7 x1-dfn1216-4 b7
AH1897 document number: ds36470 rev. 1 - 2 7 of 8 www.diodes.com august 2013 ? diodes incorporated new product a h1897 package outline dimensions (all dimensions in mm.) please see ap02002 at http://www.diodes.com /datasheets/ap02002.pdf for latest version. (1) package type: x1-dfn1216-4 bottom view sensor location suggested pad layout please see ap02001 at http://www.diodes.com/dat asheets/ap02001.pdf for the latest version. (1) package type: x1-dfn1216-4 x1-dfn1216-4 dim min max typ a 0.47 0.53 0.50 a1 0.00 0.05 0.02 a3 -- -- 0.13 b 0.15 0.25 0.20 d 1.15 1.25 1.20 d2 0.75 0.95 0.85 e 1.55 1.65 1.60 e2 0.55 0.75 0.65 e - - 0.65 l 0.20 0.30 0.25 z - - 0.175 all dimensions in mm x1-dfn1216-4 dimensions value c 0.65 x 0.25 x1 0.90 y 0.50 y1 0.70 y2 2.00 all dimensions in mm x 1 y 2 y 1 y c x ? z a 1 c ' 0 . 2 x 4 5 d d 2 e e b l e 2 a a 3 s e a t i n g p l a n e p i n # 1 i d
AH1897 document number: ds36470 rev. 1 - 2 8 of 8 www.diodes.com august 2013 ? diodes incorporated new product a h1897 important notice diodes incorporated makes no warranty of any kind, express or implied, with regards to this document, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose (and their equivalents under the laws of any jurisdiction). diodes incorporated and its subsidiaries rese rve the right to make modifications, enhanc ements, improvements, corrections or ot her changes without further notice to this document and any product descri bed herein. diodes incorporated does not assume any liability arising out of the application or use of this document or an y product described herein; neither does di odes incorporated convey any license under its patent or trademark rights, nor the rights of others. any customer or us er of this document or products described herein in such applica tions shall assume all risks of such use and will agree to hold diodes incorporated and all the companies whose products are represented on diodes incorporated website, harmless against all damages. diodes incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthoriz ed sales channel. should customers purchase or use diodes inco rporated products for any unintended or una uthorized application, customers shall i ndemnify and hold diodes incorporated and its representativ es harmless against all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim of personal injury or death a ssociated with such unintended or unauthorized application. products described herein may be covered by one or more united states, international or foreign patents pending. product names and markings noted herein may also be covered by one or more united states, international or foreign trademarks. this document is written in english but may be translated into multiple languages for reference. only the english version of t his document is the final and determinative format released by diodes incorporated. life support diodes incorporated products are specifically not authorized for use as critical component s in life support devices or systems without the express written approval of the chief executive offi cer of diodes incorporated. as used herein: a. life support devices or syst ems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when proper ly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user. b. a critical component is any component in a life support devic e or system whose failure to perform can be reasonably expect ed to cause the failure of the life support device or to affect its safety or effectiveness. customers represent that they have all necessary expertise in the safety and regulatory ramifi cations of their life support dev ices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-rel ated requirements concerning the ir products and any use of diodes incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or s ystems-related information or support that may be provided by diodes incorporated. further, customers must fully indemnify diodes incorporate d and its representatives against any damages arisi ng out of the use of diodes incorporated pr oducts in such safety-critical, life suppor t devices or systems. copyright ? 2013, diodes incorporated www.diodes.com
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