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unisonic technologies co., ltd sk1812 linear integrated circuit www.unisonic.com.tw 1 of 6 copyright ? 2005 unisonic technologies co., ltd qw-r118-008,a bipolar latch type hall - effect for high-temperature operation description sk1812 is a semiconductor integr ated circuit utilizing the hall effect. it has been so designed as to operate in the alternating magnetic field especially at lo w supply voltage and operation over extended temperature ranges to +125 .this hall ic is suitable for
application to various kinds of sens ors, contactless switches, and the like. features * wide supply voltage range of 2.5v to 20v * wide temperature operati on range of -20 ~+125

* alternating magnetic field operation * ttl and mos ic are directly drivable by the output * the life is semipermanent because it employs contactless parts * sip-3 and sot-23 package applications * speed sensor * position sensor * rotation sensor * contact-less sensor * motor control sot-23 1 2 3 sip-3 1 *pb-free plating product number: sk1812l ordering information order number pin assignment normal lead free plating package 1 2 3 packing sk1812-ae3-r SK1812L-AE3-R sot-23 o i g tape reel sk1812-g03-k sk1812l-g03-k sip-3 i g o bulk note: pin assignment: i:v cc o:v out g:gnd SK1812L-AE3-R (1)packing type (2)package type (3)lead plating (1) k: bulk, r: tape reel (2) ae3: sot-23, g03: sip-3 (3) l: lead free plating, blank: pb/sn
sk1812 linear integrated circuit unisonic technologies co., ltd 2 of 6 www.unisonic.com.tw qw-r118-008,a marking information sip-3 sot-23 1812 1812 l: lead free plating, blank: pb/sn date code l: lead free plating, blank: pb/sn block diagram amplifier schmidt trigger output stage hall element vcc gnd output regulator
sk1812 linear integrated circuit unisonic technologies co., ltd 3 of 6 www.unisonic.com.tw qw-r118-008,a absolute maximum ratings (ta = 25
) parameter symbol ratings unit supply voltage v cc 2.5~20 v supply current i cc 10 ma circuit current i o 20 ma sip-3 400 power dissipation sot-23 p d 200 mw operating temperature t opr -20 ~ +125
storage temperature t stg -55 ~ +150
note absolute maximum ratings are those values beyond which the device could be permanently damaged. absolute maximum ratings are st ress ratings only and functional devic e operation is not implied. electrical characteristics (ta=25
, unless otherwise specified.) parameter symbol test conditions min typ max unit v cc =16v, i out =12ma, b=30mt 0.7 v low-level output voltage v ol v cc =3.6v, i out =12ma, b=30mt 0.7 v output leakage current i leak v cc =16v,b=-30mt 1 10 a output short circuit current -ios v cc =16v,v out =0v,b=-30mt 0.8 ma v cc =16v 6 ma supply current i cc v cc =3.6v 5.5 ma magnetic characteristics operate point b op ta = +25
5 mt release point b rp ta = +25
-5 mt hysteresis b hys ta = +25
10 mt note: 1. b op =operate point (output turns on); b rp =release point (output turns off); b hys =hysteresis(b op ? b rp ). as used here, negative flux densit ies are defined as less than zero (algebraic convention). typical values are at ta = +25 and v
cc = 12v. 2. 1mt=10 gauss
sk1812 linear integrated circuit unisonic technologies co., ltd 4 of 6 www.unisonic.com.tw qw-r118-008,a package information sip-3 sot-23 4.1 mm 0. 95 mm 2.01 mm 3.0 mm 0.385 mm 1. 00 mm fig. 1 sensor locations 13 s n marked face 1. vcc 2. gnd 3. output 2 sip-3 s n marked face 1. vcc 2. output 3. gnd sot-23 3 12 bh bop 0 brp h l vout magnetic flux density fig.2 applying direction of magnetic flux
sk1812 linear integrated circuit unisonic technologies co., ltd 5 of 6 www.unisonic.com.tw qw-r118-008,a typical application circuit pin 3 pin 1 pin 2 sk1812 sip-3 12v~3v
sk1812 linear integrated circuit unisonic technologies co., ltd 6 of 6 www.unisonic.com.tw qw-r118-008,a typical characteristics switch points -30 -20 -10 0 10 20 30 0 25557595 ambient temperature in
switch point in gauss hysteresis 34 35 36 37 38 39 40 41 42 43 0 25557595 ambient temperature in
hysteresis in gauss output saturation voltage 195 200 205 210 215 220 225 230 235 0 25557595 anbient temperature in
saturation voltage in mv vo(sat) - io 5.5 12.5 19.0 25.0 30.0 35.0 37.0 39.0 41.0 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 voltage ( v ) current ( ma ) sink vin - icc 3.48 3.55 3.65 3.70 3.73 3.30 3.35 3.40 3.45 3.50 3.55 3.60 3.65 3.70 3.75 3 5 12 15 20 voltage ( v ) input current ( ma ) icc supply current 2.70 2.80 2.90 3.00 3.10 3.20 3.30 3.40 3.50 3.60 3.70 0 25557595 ambient temperature in
supply current in ma utc assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all utc products described or contained herein. utc products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.

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