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data sheet high sensitivity micropower omnipolar hall-effect switch AH9247 mar. 2013 rev. 2. 0 bcd semiconductor manufacturing limited 1 general description the AH9247 is an ultra-sensitive hall-effect switch with digital latched output, mainly designed for battery-operation, handheld equipments. special cmos process is used for low-voltage and low-power requirement. a chopper stabilized amplifier improves stability of magnetic switch points. a sleep-awake logic controls the ic in sleep time or awake time. this function will reduce the average operating current of the ic. during the awake time, the output is changed with the magnetic flux density. during the sleep time, the output is latched in its previous state and the current consumption will reduce to some a. the ic switching behaviour is omnipolar, either north or south pole sufficient strength will turn the output on. if the magnetic flux density is larger than operating point (b op ), the output will be turned on; if it is less than releasing point (b rp ), the output will be turned off. the AH9247 is available in to-92s-3, sot-23-3 and dfn-22-3 packages which are optimized for most applications. features ? micropower operation ? 2.5 to 5.5v power supply ? switching for both poles of a magnet (omnipolar) ? stabilized chopper ? superior temperature stability ? digital output signal ? built-in pull-up resistor ? esd (hbm) 6000v applications ? cover switch in notebook pc/pda ? handheld wireless app lication awake switch ? magnet switch in low duty cycle applications figure 1. package types of AH9247 to-92s-3 sot-23-3 dfn-22-3
data sheet high sensitivity micropower omnipolar hall-effect switch AH9247 mar. 2013 rev. 2. 0 bcd semiconductor manufacturing limited 2 pin configuration z3 package n package (to-92s-3) (sot-23-3) (front view) (top view) dn package (dfn-22-3) pin 1 mar k 3 2 1 vcc output gnd (top view) figure 2. pin configuration of AH9247 pin description pin number pin name function to-92s-3 sot-23-3 dfn-22-3 1 1 1 vcc power supply pin 2 3 3 gnd ground pin 3 2 2 output output pin
data sheet high sensitivity micropower omnipolar hall-effect switch AH9247 mar. 2013 rev. 2. 0 bcd semiconductor manufacturing limited 3 functional block diagram a (b) a for to-92s-3 b for sot-23-3 and dfn-22-3 figure 3. functional block diagram of AH9247 ordering information AH9247 - circuit type g1: green package z3: to-92s-3 tr: ammo or tape & reel n: sot-23-3 dn: dfn-22-3 package temperature range part number marking id packing type to-92s-3 -40 to 85 c AH9247z3tr-g1 9247 ammo sot-23-3 AH9247ntr-g1 gx8 tape & reel dfn-22-3 AH9247dntr-g1 jf tape & reel bcd semiconductor's pb-free products, as designated with "g1" suffix in the part number, are rohs compliant and green.
data sheet high sensitivity micropower omnipolar hall-effect switch AH9247 mar. 2013 rev. 2. 0 bcd semiconductor manufacturing limited 4 absolute maximum ratings (t a =25 c, note 1) parameter symbol value unit supply voltage v cc 7 v supply current (fault) i cc 6 ma output voltage v out 7 v output current i out 2 ma magnetic flux density b unlimited gauss power dissipation p d to-92s-3 400 mw sot-23-3 230 dfn-22-3 230 storage temperature t stg -55 to 150 c junction temperature t j 150 c esd (human body model) (note 2) 6000 v esd (machine model) (note 2) 400 v note 1: stresses greater than those listed under ?absolute maximum ratings? may cause permanent damage to the device. these are stress ratings only, and functional op eration of the device at these or any other conditions beyond those indicated under ?recommended operating co nditions? is not implied. exposure to ?absolute maximum ratings? for extended periods may affect device reliability. note 2: electronic semiconductor products are sensitive to electro static discharge (esd). always observe electro static discharge control procedures whenever handling semiconductor products. recommended operating conditions parameter symbol min max unit supply voltage v cc 2.5 5.5 v operating temperature t op -40 85 c
data sheet high sensitivity micropower omnipolar hall-effect switch AH9247 mar. 2013 rev. 2. 0 bcd semiconductor manufacturing limited 5 electrical characteristics v cc =3v, t a =25c, unless otherwise specified. parameter symbol conditions min typ max units supply voltage v cc operating 2.5 3 5.5 v supply current i aw awake 1.8 3 ma i sl sleep 4 10 a i av g average 8 15 a output current i out 1.0 ma saturation voltage v sat i out =1.0ma 0.4 v awake mode time t aw operating 120 s sleep mode time t sl operating 80 120 ms duty cycle d 0.15 % chopper frequency f c 15 kh z magnetic characteristics (note 3) v cc =3v, t a =25c, unless otherwise specified. for to-92s-3 package parameter symbol conditions min typ max unit operating point b ops south pole to branded side b>b ops ,v out =low(output on) 15 30 55 gauss b opn north pole to branded side b>b opn ,v out =low(output on) -55 -30 -15 gauss releasing point b rps south pole to branded side b data sheet high sensitivity micropower omnipolar hall-effect switch AH9247 mar. 2013 rev. 2. 0 bcd semiconductor manufacturing limited 6 magnetic characteristics (note 3) (continued) v cc =3v, t a =25c, unless otherwise specified. for sot-23-3 and dfn-22-3 packages parameter symbol conditions min typ max unit operating point b ops south pole to branded side b>b ops ,v out =low(output on) 20 30 40 gauss b opn north pole to branded side b>b opn ,v out =low(output on) -40 -30 -20 gauss releasing point b rps south pole to branded side b data sheet high sensitivity micropower omnipolar hall-effect switch AH9247 mar. 2013 rev. 2. 0 bcd semiconductor manufacturing limited 7 test conditions a AH9247 output gnd i cc v cc figure 5. average supply current (note 5, note 6) note 5: i cc represents the average supply current. output is open during measurement. note 6: the device is put under magnetic field with bAH9247 output gnd v sat v cc v 1ma figure 6. output saturation voltage (note 7, note 8) note 7: the output saturation voltage v sat is measured at v cc =2.5v and v cc =5.5v note 8: the device is put under magnetic field with b>b op
data sheet high sensitivity micropower omnipolar hall-effect switch AH9247 mar. 2013 rev. 2. 0 bcd semiconductor manufacturing limited 8 test conditions (continued) AH9247 output gnd v cc v figure 7. magnetic thresholds (note 9, note10) note 9: b op is determined by putting the device under magnetic field swept from b rp(min) to b op(max) until the output is switched on. note 10: b rp is determined by putting the device under magnetic field swept from b op(max) to b rp(min) until the output is switched off.
data sheet high sensitivity micropower omnipolar hall-effect switch AH9247 mar. 2013 rev. 2. 0 bcd semiconductor manufacturing limited 9 typical performance characteristics figure 8. b op /b rp vs. supply voltage figure 9. b op /b rp vs. ambient temperature figure 10. average supply current figure 11. awake mode time vs. supply voltage vs. supply voltage 2.52.62.72.82.93.03.13.23.33.43.5 -50 -40 -30 -20 -10 0 10 20 30 40 50 b op /b rp (gs) supply voltage(v) b ops b rps b opn b rpn -40-20 0 20406080 -50 -40 -30 -20 -10 0 10 20 30 40 50 b op /b rp (gs) ambient temperature ( o c) b ops b rps b opn b rpn 2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 6 7 8 9 10 11 12 13 14 15 average supply current ( a) supply voltage(v) 2.52.62.72.82.93.03.13.23.33.43.5 0 25 50 75 100 125 150 175 200 225 250 275 300 awake mode time ( s) supply voltage (v)
data sheet high sensitivity micropower omnipolar hall-effect switch AH9247 mar. 2013 rev. 2. 0 bcd semiconductor manufacturing limited 10 0 25 50 75 100 125 150 0 50 100 150 200 250 300 350 400 450 power dissipation (mw) ambient temperature ( o c) to-92s-3 sot-23-3/dfn-2x2-3 typical performance characte ristics (characteristic) figure 12. sleep mode time vs. supply voltage figure 13. power dissipati on vs. ambient temperature 2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 50 60 70 80 90 100 110 120 sleep mode time (ms) supply voltage (v)
data sheet high sensitivity micropower omnipolar hall-effect switch AH9247 mar. 2013 rev. 2. 0 bcd semiconductor manufacturing limited 11 typical application figure 14. typical application circuit of AH9247 figure 15. typical layout pattern of AH9247 (note 11)
data sheet high sensitivity micropower omnipolar hall-effect switch AH9247 mar. 2013 rev. 2. 0 bcd semiconductor manufacturing limited 12 typical application (continued) 1.9 0.6 0.8 0.95 figure 16. AH9247 layout pattern mechanical dimensions (unit: mm) note 11: the AH9247 is an ultra-sensitive hall-effect switch with digital latched output. it is very sensitive for the magnetic field. as a result, extreme care is required with respect to the pattern layout when designing application circuits. (figure 15. is a typical application reference, figure 16. is AH9247 layout pattern mechanical dimensions.) *1. ground and vcc wiring layout insert a capacitor (recommended value: 10nf or larger) as near as possible to the space between the vcc pin and gnd pin. *2. positioning the external components the external components such as c2 (recommended value: 100pf) that are connected to ground must be connected with lines that are as short as possible. external components connected between ic pins must be placed as near to the pins as possible. *3. pad layout around hall switch place some large current lines and some elements that have magnetism, such as speaker and dc fan, as far to the hall switch as possible. *4. gnd pattern if possible, gnd pattern is as large as possible so that the power dissipation from the nb inner case or solder machine can dissipate quickly.
data sheet high sensitivity micropower omnipolar hall-effect switch AH9247 mar. 2013 rev. 2. 0 bcd semiconductor manufacturing limited 13 mechanical dimensions to-92s-3 unit: mm(inch) 1.270(0.050) typ 1.600(0.063) typ 2.900(0.114) 3.310(0.130) 3.850(0.152) 4.150(0.163) 0.750(0.030) typ 1.420(0.056) 1.620(0.064) 0.380(0.015) 0.550(0.022) 1.050(0.041) 1.350(0.053) 1.850(0.073) 2.150(0.085) package sensor location 0.360(0.014) 0.480(0.019) 44 46 0.360(0.014) 0.510(0.020) 14.000(0.551) 15.500(0.610)
data sheet high sensitivity micropower omnipolar hall-effect switch AH9247 mar. 2013 rev. 2. 0 bcd semiconductor manufacturing limited 14 mechanical dimensions (continued) sot-23-3 unit: mm(inch) 2. 820(0. 111) 3. 100(0. 122) 2.650(0.104) 3.000(0.118) 0.950(0. 037) typ 0. 300(0. 012) 0. 500(0. 020) 1.500(0.059) 1.700(0.067) 1. 800(0. 071) 2. 000(0. 079) 0.300(0.012) 0.600(0.024) 0. 100(0. 004) 0. 200(0. 008) 0. 000(0. 000) 0. 150(0. 006) 0. 900(0. 035) 1. 300(0. 051) 1.450(0.057) max. 0. 200(0. 008) 0 8 1. 3 5 0( 0. 0 5 3) 1. 5 5 0( 0. 0 6 1) 0. 800(0. 031) 1. 000(0. 039) package sensor location
data sheet high sensitivity micropower omnipolar hall-effect switch AH9247 mar. 2013 rev. 2. 0 bcd semiconductor manufacturing limited 15 mechanical dimensions (continued) dfn-22-3 unit: mm(inch)
important notice bcd semiconductor manufacturing limited reserves the right to make changes without further not ice to any products or specifi- cations herein. bcd semiconductor manufacturing limited does not as sume any responsibility for us e of any its products for any particular purpose, nor does bcd semiconductor manufacturi ng limited assume any liability aris ing out of the application or use of any its products or circui ts. bcd semiconductor manufacturing limited does not convey any license under its patent rights or other rights nor the rights of others. - wafer fab shanghai sim-bcd semiconductor manufacturing co., ltd. 800 yishan road, shanghai 200233, china tel: +021-6485-1491, fa x: +86-021-5450-0008 main site regional sales office shenzhen office shanghai sim-bcd semiconductor manu facturing co., ltd., shenzhen office unit a room 1203,skyworth bldg., gaoxin ave.1.s., nanshan district shenzhen 518057, china tel: +86-0755-8660-4900, fax: +86-0755-8660-4958 taiwan office (taipei) bcd semiconductor (taiwan) company limited 3f, no.17, lane 171, sec. 2, jiu-zong rd., ne i-hu dist., taipei(114), taiwan, r.o.c tel: +886-2-2656 2808 fax: +886-2-2656-2806/26562950 taiwan office (hsinchu) bcd semiconductor (taiwan) company limited 8f, no.176, sec. 2, gong-dao 5th road, east district hsinchu city 300, taiwan, r.o.c tel: +886-3-5160181, fax: +886-3-5160181 - headquarters bcd (shanghai) micro-electronics limited no. 1600, zi xing road, shanghai zizhu scie nce-based industrial park, 200241, p. r.c. tel: +86-021-2416-2266, fax: +86-021-2416-2277 usa office bcd semiconductor corp. 48460 kato road, fremont, ca 94538, usa tel: +1-510-668-1950 fax: +1-510-668-1990 korea office bcd semiconductor limited korea office. room 101-1112, digital-empire ii, 486 sin-dong, yeongtong-gu, suwon-city, gyeonggi-do, korea tel: +82-31-695-8430 important notice bcd semiconductor manufacturing limited reserves the right to make changes without further not ice to any products or specifi- cations herein. bcd semiconductor manufacturing limited does not as sume any responsibility for us e of any its products for any particular purpose, nor does bcd semiconductor manufacturi ng limited assume any liability aris ing out of the application or use of any its products or circui ts. bcd semiconductor manufacturing limited does not convey any license under its patent rights or other rights nor the rights of others. - wafer fab shanghai sim-bcd semiconductor manufacturing limited 800, yi shan road, shanghai 200233, china tel: +86-21-6485 1491, fax: +86-21-5450 0008 bcd semiconductor manufacturing limited main site regional sales office shenzhen office shanghai sim-bcd semiconductor manuf acturing co., ltd. shenzhen office advanced analog circuits (shanghai) corporation shenzhen office room e, 5f, noble center, no.1006, 3rd fuzhong road, futian district, shenzhen 518026, china tel: +86-755-8826 7951 fax: +86-755-8826 7865 taiwan office bcd semiconductor (taiwan) company limited 4f, 298-1, rui guang road, nei-hu district, taipei, taiwan tel: +886-2-2656 2808 fax: +886-2-2656 2806 usa office bcd semiconductor corporation 30920 huntwood ave. hayward, ca 94544, u.s.a tel : +1-510-324-2988 fax: +1-510-324-2788 - ic design group advanced analog circuits (shanghai) corporation 8f, zone b, 900, yi shan road, shanghai 200233, china tel: +86-21-6495 9539, fax: +86-21-6485 9673 bcd semiconductor manufacturing limited http://www.bcdsemi.com bcd semiconductor manufacturing limited important notice bcd semiconductor manufacturing limited reserves the right to make changes without further not ice to any products or specifi- cations herein. bcd semiconductor manufacturing limited does not as sume any responsibility for us e of any its products for any particular purpose, nor does bcd semiconductor manufacturi ng limited assume any liability aris ing out of the application or use of any its products or circui ts. bcd semiconductor manufacturing limited does not convey any license under its patent rights or other rights nor the rights of others. - wafer fab shanghai sim-bcd semiconductor manufacturing co., ltd. 800 yi shan road, shanghai 200233, china tel: +86-21-6485 1491, fax: +86-21-5450 0008 main site regional sales office shenzhen office shanghai sim-bcd semiconductor manuf acturing co., ltd., shenzhen office unit a room 1203, skyworth bldg., gaoxin ave.1.s., nanshan district, shenzhen, china tel: +86-755-8826 7951 fax: +86-755-8826 7865 taiwan office bcd semiconductor (taiwan) company limited 4f, 298-1, rui guang road, nei-hu district, taipei, taiwan tel: +886-2-2656 2808 fax: +886-2-2656 2806 usa office bcd semiconductor corp. 30920 huntwood ave. hayward, ca 94544, usa tel : +1-510-324-2988 fax: +1-510-324-2788 - headquarters bcd semiconductor manufacturing limited no. 1600, zi xing road, shanghai zizhu sc ience-based industrial park, 200241, china tel: +86-21-24162266, fax: +86-21-24162277 important notice bcd semiconductor manufacturing limited reserves the right to make changes without further not ice to any products or specifi- cations herein. bcd semiconductor manufacturing limited does not as sume any responsibility for us e of any its products for any particular purpose, nor does bcd semiconductor manufacturi ng limited assume any liability aris ing out of the application or use of any its products or circui ts. bcd semiconductor manufacturing limited does not convey any license under its patent rights or other rights nor the rights of others. - wafer fab shanghai sim-bcd semiconductor manufacturing limited 800, yi shan road, shanghai 200233, china tel: +86-21-6485 1491, fax: +86-21-5450 0008 bcd semiconductor manufacturing limited main site regional sales office shenzhen office shanghai sim-bcd semiconductor manuf acturing co., ltd. shenzhen office advanced analog circuits (shanghai) corporation shenzhen office room e, 5f, noble center, no.1006, 3rd fuzhong road, futian district, shenzhen 518026, china tel: +86-755-8826 7951 fax: +86-755-8826 7865 taiwan office bcd semiconductor (taiwan) company limited 4f, 298-1, rui guang road, nei-hu district, taipei, taiwan tel: +886-2-2656 2808 fax: +886-2-2656 2806 usa office bcd semiconductor corporation 30920 huntwood ave. hayward, ca 94544, u.s.a tel : +1-510-324-2988 fax: +1-510-324-2788 - ic design group advanced analog circuits (shanghai) corporation 8f, zone b, 900, yi shan road, shanghai 200233, china tel: +86-21-6495 9539, fax: +86-21-6485 9673 bcd semiconductor manufacturing limited http://www.bcdsemi.com bcd semiconductor manufacturing limited

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