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s-5712 series www.sii-ic.com low voltage operation both poles / unipolar detection type hall ic ? seiko instruments inc., 2010-2011 rev.4.0 _00 seiko instruments inc. 1 the s-5712 series, developed by cmos technology, is a high-a ccuracy hall ic that operat es at a low voltage and low current consumption. the output voltage changes w hen the s-5712 series detects the in tensity level of flux density. using the s-5712 series with a magnet makes it possible to detect t he open/close state in various devices. high-density mounting is possible by usi ng the super-small snt-4a or the small sot-23-3 packages. due to its low voltage operation and low current consumpt ion, the s-5712 series is suitable for batte ry-operated portable devic es. due to its high- accuracy magnetic characteristics, the s-5712 series can make operation?s dispersi on in the system combined with magnet smaller. ? features ? pole detection *1 : detection of both poles, south pole or north pole ? detection logic for magnetism *1 : active ?l?, active ?h? ? output form *1 : nch open drain output, cmos output ? magnetic sensitivity *1 : b op = 3.0 mt typ., 4.5 mt typ. ? operating cycle (current consumpt ion): product with both poles detection 50.50 ms (2.0 a) typ. product with south pole or north pole detection 50.85 ms (1.4 a) typ. ? power supply voltage range: 1.6 v to 3.5 v ? operation tem perature range: ? 40c to + 85c ? lead-free (sn 100%), halogen-free *2 *1. the option can be selected. *2. refer to ? ? product name structure ? for details. ? applications ? mobile phones (flip type, slide type, etc.) ? laptop pcs ? digital video cameras ? playthings, portable games ? home appliances ? packages ? snt-4a ? sot-23-3
low voltage operation both poles / unipolar detection type hall ic s-5712 series rev.4.0 _00 seiko instruments inc. 2 ? block diagrams 1. nch open drain output product out vdd vss *1 *1 sleep/awake logic chopping stabilized amplifier *1. parasitic diode figure 1 2. cmos output product out vdd vss *1 sleep/awake logic *1 chopping stabilized amplifier *1 *1. parasitic diode figure 2
low voltage operation both poles / unipolar detection type hall ic rev.4.0 _00 s-5712 series seiko instruments inc. 3 ? product name structure 1. product name s-5712 a x x x x ? xxxx u environmental code u : lead-free (sn 100%), halogen-free package name (abbreviation) and packing specifications *1 i4t1 : snt-4a, tape m3t1 : sot-23-3, tape magnetic sensitivity 1 : b op = 3.0 mt typ. 2 : b op = 4.5 mt typ. detection logic for magnetism l : active ?l? h : active ?h? pole detection d : detection of both poles s : detection of south pole n : detection of north pole output form n : nch open drain output c : cmos output operating cycle a : t cycle = 50.50 ms typ. (product with both poles detection) t cycle = 50.85 ms typ. (product with south pole or north pole detection) *1. refer to the tape specifications at the end of this book. 2. packages drawing code package name package tape reel land snt-4a pf004-a-p-sd pf004-a-c-sd pf004-a-r-sd pf004-a-l-sd sot-23-3 mp003-c-p-sd mp 003-c-c-sd mp003-z-r-sd ? 3. product name list table 1 output form pole detection detection logic for magnetism magnetic sensitivity (b op ) snt-4a sot-23-3 nch open drain output both poles active ?l? 3.0 mt typ. s-5712andl1-i4t1u s-5712andl1-m3t1u nch open drain output both poles active ?l? 4.5 mt typ. s-5712andl2-i4t1u s-5712andl2-m3t1u cmos output both poles active ?l? 3.0 mt typ. s-5712acdl1-i4t1u S-5712ACDL1-M3T1U cmos output both poles active ?l? 4.5 mt typ. s-5712acdl2-i4t1u s-5712acdl2-m3t1u cmos output south pole active ?l? 3.0 mt typ. s-5712acsl1-i4t1u s-5712acsl1-m3t1u cmos output south pole active ?l? 4.5 mt typ. s-5712acsl2-i4t1u s-5712acsl2-m3t1u cmos output north pole active ?l? 3.0 mt typ. s-5712acnl1-i4t1u s-5712acnl1-m3t1u cmos output north pole active ?l? 4.5 mt typ. s-5712acnl2-i4t1u s-5712acnl2-m3t1u remark please contact our sales office for products other than the above.
low voltage operation both poles / unipolar detection type hall ic s-5712 series rev.4.0 _00 seiko instruments inc. 4 ? pin configurations table 2 pin no. symbol pin description 1 vdd power supply pin 2 vss gnd pin 3 nc *1 no connection 4 out output pin snt-4a top view 1 4 2 3 figure 3 *1. the nc pin is electrically open. the nc pin can be connected to vdd or vss. table 3 pin no. symbol pin description 1 vss gnd pin 2 vdd power supply pin 3 out output pin 1 2 3 sot-23-3 top view figure 4
low voltage operation both poles / unipolar detection type hall ic rev.4.0 _00 s-5712 series seiko instruments inc. 5 ? absolute maximum ratings table 4 (ta = + 25 c unless otherwise specified) item symbol absolute maximum rating unit power supply voltage v dd v ss ? 0.3 to v ss + 7.0 v output current i out 1.0 ma nch open drain output v ss ? 0.3 to v ss + 7.0 v output voltage cmos output v out v ss ? 0.3 to v dd + 0.3 v snt-4a 300 *1 mw power dissipation sot-23-3 p d 430 *1 mw operating ambient temperature t opr ? 40 to + 85 c storage temperature t stg ? 40 to + 125 c *1. when mounted on board [mounted board] (1) board size: 114.3 mm 76.2 mm t1.6 mm (2) name: jedec standard51-7 caution the absolute maximum ra tings are rated values exceeding whic h the product could suffer physical damage. these values must therefor e not be exceeded under any conditions. power dissipation (p d ) [mw] ambient temperature (ta) [ c] 0 50 100 150 0 400 600 200 snt-4a sot-23-3 figure 5 power dissipation of package (when mounted on board)
low voltage operation both poles / unipolar detection type hall ic s-5712 series rev.4.0 _00 seiko instruments inc. 6 ? electrical characteristics 1. product with both poles detection table 5 (ta = + 25c, v dd = 1.85 v, v ss = 0 v unless otherwise specified) item symbol conditions min. typ. max. unit test circuit power supply voltage v dd ? 1.60 1.85 3.50 v ? current consumption i dd average value ? 2.0 4.0 a 1 nch open drain output product output transistor nch, i out = 0.5 ma ? ? 0.4 v 2 output transistor nch, i out = 0.5 ma ? ? 0.4 v 2 output voltage v out cmos output product output transistor pch, i out = ? 0.5 ma v dd ? 0.4 ? ? v 3 leakage current i leak nch open drain output product output transistor nch, v out = 3.5 v ? ? 1 a 4 awake mode time t aw ? ? 0.10 ? ms ? sleep mode time t sl ? ? 50.40 ? ms ? operating cycle t cycle t aw + t sl ? 50.50 100.00 ms ? 2. product with south pole and north pole detection table 6 (ta = + 25c, v dd = 1.85 v, v ss = 0 v unless otherwise specified) item symbol conditions min. typ. max. unit test circuit power supply voltage v dd ? 1.60 1.85 3.50 v ? current consumption i dd average value ? 1.4 3.0 a 1 nch open drain output product output transistor nch, i out = 0.5 ma ? ? 0.4 v 2 output transistor nch, i out = 0.5 ma ? ? 0.4 v 2 output voltage v out cmos output product output transistor pch, i out = ? 0.5 ma v dd ? 0.4 ? ? v 3 leakage current i leak nch open drain output product output transistor nch, v out = 3.5 v ? ? 1 a 4 awake mode time t aw ? ? 0.05 ? ms ? sleep mode time t sl ? ? 50.80 ? ms ? operating cycle t cycle t aw + t sl ? 50.85 100.00 ms ?
low voltage operation both poles / unipolar detection type hall ic rev.4.0 _00 s-5712 series seiko instruments inc. 7 ? magnetic characteristics 1. product with both poles detection 1. 1 b op = 3.0 mt typ. table 7 (ta = + 25c, v dd = 1.85 v, v ss = 0 v unless otherwise specified) item symbol conditions min. typ. max. unit test circuit south pole b ops ? 1.4 3.0 4.0 mt 5 operating point *1 north pole b opn ? ? 4.0 ? 3.0 ? 1.4 mt 5 south pole b rps ? 1.1 2.2 3.7 mt 5 release point *2 north pole b rpn ? ? 3.7 ? 2.2 ? 1.1 mt 5 south pole b hyss b hyss = b ops ? b rps ? 0.8 ? mt 5 hysteresis width *3 north pole b hysn b hysn = |b opn ? b rpn | ? 0.8 ? mt 5 1. 2 b op = 4.5 mt typ. table 8 (ta = + 25c, v dd = 1.85 v, v ss = 0 v unless otherwise specified) item symbol conditions min. typ. max. unit test circuit south pole b ops ? 2.5 4.5 6.0 mt 5 operating point *1 north pole b opn ? ? 6.0 ? 4.5 ? 2.5 mt 5 south pole b rps ? 2.0 3.5 5.5 mt 5 release point *2 north pole b rpn ? ? 5.5 ? 3.5 ? 2.0 mt 5 south pole b hyss b hyss = b ops ? b rps ? 1.0 ? mt 5 hysteresis width *3 north pole b hysn b hysn = |b opn ? b rpn | ? 1.0 ? mt 5 2. product with south pole detection 2. 1 b op = 3.0 mt typ. table 9 (ta = + 25c, v dd = 1.85 v, v ss = 0 v unless otherwise specified) item symbol conditions min. typ. max. unit test circuit operating point *1 south pole b ops ? 1.4 3.0 4.0 mt 5 release point *2 south pole b rps ? 1.1 2.2 3.7 mt 5 hysteresis width *3 south pole b hyss b hyss = b ops ? b rps ? 0.8 ? mt 5 2. 2 b op = 4.5 mt typ. table 10 (ta = + 25c, v dd = 1.85 v, v ss = 0 v unless otherwise specified) item symbol conditions min. typ. max. unit test circuit operating point *1 south pole b ops ? 2.5 4.5 6.0 mt 5 release point *2 south pole b rps ? 2.0 3.5 5.5 mt 5 hysteresis width *3 south pole b hyss b hyss = b ops ? b rps ? 1.0 ? mt 5
low voltage operation both poles / unipolar detection type hall ic s-5712 series rev.4.0 _00 seiko instruments inc. 8 3. product with north pole detection 3. 1 b op = 3.0 mt typ. table 11 (ta = + 25c, v dd = 1.85 v, v ss = 0 v unless otherwise specified) item symbol conditions min. typ. max. unit test circuit operating point *1 north pole b opn ? ? 4.0 ? 3.0 ? 1.4 mt 5 release point *2 north pole b rpn ? ? 3.7 ? 2.2 ? 1.1 mt 5 hysteresis width *3 north pole b hysn b hysn = |b opn ? b rpn | ? 0.8 ? mt 5 3. 2 b op = 4.5 mt typ. table 12 (ta = + 25c, v dd = 1.85 v, v ss = 0 v unless otherwise specified) item symbol conditions min. typ. max. unit test circuit operating point *1 north pole b opn ? ? 6.0 ? 4.5 ? 2.5 mt 5 release point *2 north pole b rpn ? ? 5.5 ? 3.5 ? 2.0 mt 5 hysteresis width *3 north pole b hysn b hysn = |b opn ? b rpn | ? 1.0 ? mt 5 *1. b opn , b ops : operating points the operating points are the values of magnetic flux density when the output voltage (v out ) is inverted after the magnetic flux density applied to the s-5712 series by the magnet (north or south pole) is increased (the magnet is moved closer). even when the magnetic flux density exceeds b opn or b ops , v out retains the status. *2. b rpn , b rps : release points the release points are the values of magnetic flux density when the output voltage (v out ) is inverted after the magnetic flux density applied to the s-5712 series by the magnet (north or south pole) is decreased (the magnet is moved further away). even when the magnetic flux density falls below b rpn or b rps , v out retains the status. *3. b hysn , b hyss : hysteresis widths b hysn and b hyss are the difference between b opn and b rpn , and b ops and b rps , respectively. remark the unit of magnetic density mt can be conver ted by using the formula 1 mt = 10 gauss.
low voltage operation both poles / unipolar detection type hall ic rev.4.0 _00 s-5712 series seiko instruments inc. 9 ? test circuits 1. s-5712 series vdd vss out a r *1 100 k *1. resistor (r) is unnecessary for the cmos output product. figure 6 2. s-5712 series vdd vss out a v figure 7 3. s-5712 series vdd vss out a v figure 8
low voltage operation both poles / unipolar detection type hall ic s-5712 series rev.4.0 _00 seiko instruments inc. 10 4. s-5712 series vdd vss out a v figure 9 5. s-5712 series vdd vss out v r *1 100 k *1. resistor (r) is unnecessary for the cmos output product. figure 10
low voltage operation both poles / unipolar detection type hall ic rev.4.0 _00 s-5712 series seiko instruments inc. 11 ? standard circuit s-5712 series vdd vss out c in r *1 100 k 0.1 f *1. resistor (r) is unnecessary for the cmos output product. figure 11 caution the above connection diag ram and constant will not guara ntee successful operation. perform thorough evaluation using the actual application to set the constant.
low voltage operation both poles / unipolar detection type hall ic s-5712 series rev.4.0 _00 seiko instruments inc. 12 ? operation 1. direction of applied magnetic flux the s-5712 series detects the flux density which is vertical to the marking surface. in products with detection of both poles, the output voltage (v out ) is inverted when the south or north pole is moved closer to the marking surface. in products with detection of the south pole, the output voltage (v out ) is inverted when the south pole is moved closer to the marking surface. in products with detection of the north pole, the output voltage (v out ) is inverted when the north pole is moved closer to the marking surface. figures 12 and 13 show the direction in which magnetic flux is being applied. 1. 1 snt-4a 1. 2 sot-23-3 marking surface s n marking surface s n figure 12 figure 13 2. position of hall sensor figures 14 and 15 show the position of hall sensor. the center of this hall sensor is located in the area indi cated by a circle, which is in the center of a package as described below. the following also shows the distance (typ. value) between the marking surface and the chip surface of a package. 2. 1 snt-4a 2. 2 sot-23-3 top view 1 4 23 0.16 mm (typ.) the center of hall sensor; in this 0.3 mm 1 top view 23 0.7 mm (typ.) the center of hall sensor; in this 0.3 mm figure 14 figure 15
low voltage operation both poles / unipolar detection type hall ic rev.4.0 _00 s-5712 series seiko instruments inc. 13 3. basic operation the s-5712 series changes the output voltage level (v out ) according to the level of the magnetic flux density (north or south pole) applied by a magnet. the following explains the operation when the magnetism detection logic is active ?l?. 3. 1 products with detection of both poles when the magnetic flux density vertical to the marking surface exceeds b opn or b ops after the south or north pole of a magnet is moved closer to the marking surface of the s-5712 series, v out changes from ?h? to ?l?. when the south or north pole of a magnet is moved further aw ay from the marking surface of the s-5712 series and the magnetic flux density is lower than b rpn or b rps , v out changes from ?l? to ?h?. figure 16 shows the relationship between the magnetic density and v out . v out 0 b opn b rpn b rps b ops b hyss b hysn h l flux density (b) north pole south pole figure 16 3. 2 products with detection of south pole when the magnetic flux density vertical to the marking surface exceeds b ops after the south pole of a magnet is moved closer to the marking surface of the s-5712 series, v out changes from ?h? to ?l?. when the south pole of a magnet is moved further away from the marking surf ace of the s-5712 series and the magnetic flux density is lower than b rps , v out changes from ?l? to ?h?. figure 17 shows the relationship between the magnetic density and v out . v out 0 b rps b ops b hyss h l flux density (b) north pole south pole figure 17
low voltage operation both poles / unipolar detection type hall ic s-5712 series rev.4.0 _00 seiko instruments inc. 14 3. 3 products with detection of north pole when the magnetic flux density vertical to the marking surface exceeds b opn after the north pole of a magnet is moved closer to the marking surface of the s-5712 series, v out changes from ?h? to ?l?. when the north pole of a magnet is moved further away from the marking surf ace of the s-5712 series and the magnetic flux density is lower than b rpn , v out changes from ?l? to ?h?. figure 18 shows the relationship between the magnetic density and v out . v out 0 b opn b rpn b hysn h l flux density (b) north pole south pole figure 18
low voltage operation both poles / unipolar detection type hall ic rev.4.0 _00 s-5712 series seiko instruments inc. 15 ? precautions ? if the impedance of the power supply is high, the ic may malfunction due to a supply voltage drop caused by through- type current. take care with the pattern wiring to ensure that the impedance of the power supply is low. ? note that the ic may malfunction if the power supply voltage rapidly changes. ? do not apply an electrostatic discharge to this ic that ex ceeds the performance ratings of the built-in electrostatic protection circuit. ? large stress on this ic may affect on the magnetic charac teristics. avoid large stress which is caused by bend and distortion during mounting the ic on a board or handle after mounting. ? sii claims no responsibility for any dis putes arising out of or in connection with any infringement by products including this ic of patents owned by a third party.
low voltage operation both poles / unipolar detection type hall ic s-5712 series rev.4.0 _00 seiko instruments inc. 16 ? marking specifications 1. snt-4a (1) to (3) : product code (refer to product name vs. product code .) 1 snt-4a to p view (1) (2) (3) 2 4 3 product name vs. product code 1. 1 nch open drain output product product code product name (1) (2) (3) s-5712andl1-i4t1u x a b s-5712andl2-i4t1u x a c 1. 2 cmos output product product code product name (1) (2) (3) s-5712acdl1-i4t1u x b b s-5712acdl2-i4t1u x b c s-5712acsl1-i4t1u x b j s-5712acsl2-i4t1u x b k s-5712acnl1-i4t1u x b r s-5712acnl2-i4t1u x b s
low voltage operation both poles / unipolar detection type hall ic rev.4.0 _00 s-5712 series seiko instruments inc. 17 2. sot-23-3 (1) to (3) : product code (refer to product name vs. product code .) (4) : lot number 1 2 3 (1) (2) (3) (4) sot-23-3 to p view product name vs. product code 2. 1 nch open drain output product product code product name (1) (2) (3) s-5712andl1-m3t1u x a b s-5712andl2-m3t1u x a c 2. 2 cmos output product product code product name (1) (2) (3) S-5712ACDL1-M3T1U x b b s-5712acdl2-m3t1u x b c s-5712acsl2-m3t1u x b j s-5712acsl2-m3t1u x b k s-5712acnl2-m3t1u x b r s-5712acnl2-m3t1u x b s

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www.sii-ic.com ? the information described herein is subject to change without notice. ? seiko instruments inc. is not responsible for any pr oblems caused by circuits or diagrams described herein whose related industrial properties, patents, or ot her rights belong to third parties. the application circuit examples explain typical applications of the products, and do not guarant ee the success of any specific mass-production design. ? when the products described herein are regulated produ cts subject to the wassenaar arrangement or other agreements, they may not be exported without authoriz ation from the appropriate governmental authority. ? use of the information described he rein for other purposes and/or repr oduction or copying without the express permission of seiko instrum ents inc. is strictly prohibited. ? the products described herein cannot be used as par t of any device or equipment affecting the human body, such as exercise equipment, medical equipment, security systems, gas equipment, or any apparatus installed in airplanes and other vehicles, without prior written permission of seiko instruments inc. ? although seiko instruments inc. exerts the greatest possible effort to ensure high quality and reliability, the failure or malfunction of semiconductor products may oc cur. the user of these products should therefore give thorough consideration to safety design, including redundancy, fire-prevention measures, and malfunction prevention, to prevent any accidents, fires, or community damage that may ensue.

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