unisonic technologies co., ltd uhe4913 cmos ic www.unisonic.com.tw 1 of 4 copyright ? 2015unisonic technologies co., ltd qw-r502-608.c low power hall effect switch ? description uhe4913 is a low-power integrated hall switch designed to sense the applied magnetic flux density and give a digital output, which indicates the present condi tion of the magnitude sensed. it is 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 uhe4913 is down to 10 w in 2.7v supply. the output will be at the ?high? level when no magnetic field is applied. when the applied magnetic flux density is stronger than the switching threshold, the output would be at the ?low? level. ? features * micropower operation * 2.4v to 5.5v battery operation * switching for both poles of magnet * offset canceling technology * superior temperature stability * extremely low switch-point drift * insensitive to physical stress ? ordering information ordering number package pin assignment packing 1 2 3 UHE4913G-AE3-R sot-23 o i g tape reel note: pin assignment: o: output i: v dd g: gnd ? marking uemg 1 2 3
uhe4913 cmos ic unisonic technologies co., ltd 2 of 4 www.unisonic.com.tw qw-r502-608.c ? pin configuration ? pin description pin name pin type pin description v out o digital output v dd i power supply gnd g ground note: o=output, i=po wer supply, g=ground ? block diagram offset cancelling amp logic control
uhe4913 cmos ic unisonic technologies co., ltd 3 of 4 www.unisonic.com.tw qw-r502-608.c ? absolute maximum rating parameter symbol ratings unit supply voltage v dd 5.5 v supply current i q -1 ~ +2.5 ma magnetic flux density b unlimited mt junction temperature t j 150 c operation temperature t opr -40 ~ +85 c storage temperature t stg -40 ~ +150 c note: absolute maximum ratings are those values be yond 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 c ) parameter symbol conditions min typ max unit supply voltage v dd operating 2.4 2.7 5.5 v output voltage v out -0.3 2.7 5.5 v ambient temperature t a -40 25 85 c ? electrical characteristics (t a =25c) parameter symbol conditions min typ max unit output saturation voltage v sat v dd =2.7v 0.1 v output leakage current i off 0.01 a supply current i dd ( en ) v dd =2.7v 1.1 ma i dd ( dis ) 2.5 a i dd ( avg ) 3 20 a operating time t op v dd =2.7v 50 s standby time t sd 130 ms duty cycle d.c. 0.04 % output rise time t r r l =2.7k ? ,c l =10 p f 0.5 1 s output fall time t f r l =2.7k ? ,c l =10 p f 0.1 1 s ? magnetic characteristics ( t a =25c,v dd =2.7v) parameter symbol min typ max unit operation points |b op | 20 35 50 gauss release points |b rp | 12 27 42 hysteresis |b op ?b rp | 2 8 16
uhe4913 cmos ic unisonic technologies co., ltd 4 of 4 www.unisonic.com.tw qw-r502-608.c ? typical application circuit ? magnetic flux 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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