unisonic technologies co., ltd UH8100 cmos ic www.unisonic.com.tw 1 of 6 copyright ? 2011 unisonic technologies co., ltd qw-r502-413.c low power hall effect switch ? description UH8100 is a low-power integrated hall switch designed to sense the applied magnetic flux density and give a digital output, which indicates the present condit ion of the magnitude sensed. it mainly designed for battery-powered system and hand-held equipment, such as cellular flip-phones and pda?s, in which power consumption is one major concern. the typical power consumption of UH8100 is down to 15uw at 2.75v supply. for UH8100 , the output will be high when no magnetic field is applied and be low when the applied magnetic flux density is stronger than the switching threshold. the difference between UH8100a and UH8100b is that UH8100a consumes less power than UH8100b in the hall sensor operation. ? features * micro power operation * 2.5v to 5.5v battery operation * offset canceling technology * superior temperature stability * extremely low switch-point drift * insensitive to physical stress sot-23 (eiaj sc-59) 1 2 3 ? ordering information ordering number package pin assignment packing lead free halogen free 1 2 3 UH8100al-ae3-r UH8100ag-ae3-r sot-23 o i g tape reel UH8100bl-ae3-r UH8100bg-ae3-r sot-23 o i g tape reel note: o: v out , i: v dd , g: gnd ? marking UH8100a UH8100b
UH8100 cmos ic unisonic technologies co., ltd 2 of 6 www.unisonic.com.tw qw-r502-413.c ? pin configurations ? pin description pin name pin type pin description v out o digital output v dd p power supply gnd g ground note: o=output, p=po wer supply, g=ground
UH8100 cmos ic unisonic technologies co., ltd 3 of 6 www.unisonic.com.tw qw-r502-413.c ? block diagram hall plate offset cancelling amp logic control v dd gnd output
UH8100 cmos ic unisonic technologies co., ltd 4 of 6 www.unisonic.com.tw qw-r502-413.c ? absolute maximum rating (t a =25 ) parameter symbol ratings unit magnetic flux density b unlimited mt supply voltage v dd 7 v output current i o 10 ma package power dissipation p d 230 mw junction temperature t j 150 operation temperature t opr -40 ~ +85 storage temperature t stg -65 ~ +150 note: absolute maximum ratings are those values beyo nd which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device oper ation is not implied. ? recommended operating conditions ( t a =25 ) parameter symbol conditions min typ max unit supply voltage v dd operating 2.5 5.5 v ? electrical characteristics (t a =25 ) parameter symbol conditions min typ max unit output on voltage v out v dd =3v, i out =1ma 0.1 0.3 v output leakage current i off v dd =3v, v out =5.5v, bUH8100a 5 10 ua UH8100b 280 500 ua awake time t awake v dd =3v 50 100 us period t period v dd =3v,UH8100a 50 100 ms v dd =3v,UH8100b 200 400 us duty cycle d.c. v dd =3v,UH8100a 0.1 % v dd =3v,UH8100b 25 % ? magnetic characteristics ( t a =25 ,v dd =3v) parameter symbol min typ max unit operation points |b op | 40 60 gauss release points |b rp | 10 30 hysteresis |b op ?b rp | 10
UH8100 cmos ic unisonic technologies co., ltd 5 of 6 www.unisonic.com.tw qw-r502-413.c ? typical application circuit 3 2 1 1 gnd v dd output pull up resistor digital output (reconmand 50k) 2.5~5.5v
UH8100 cmos ic unisonic technologies co., ltd 6 of 6 www.unisonic.com.tw qw-r502-413.c ? magnetic flux b b rp b op 0 on-state off-state turn on turn off output voltage output 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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