mrms311h high accuracy type mr sensor mrms311 is optimal magnetic sensor for applications which require precise control of the detection range. nec's original thin film control technology contributed to highly improved magnetic field sensitivity range as well as temperature characteristics. [application examples] ? mobile phones, notebook pcs and pd as requiring high accuracy detection angle ? slider phones requiring high accuracy position detection ? applications requiring minimi zation of temperature dependence features mrms311 is narrow sensitivity ty pe mr sensor which features min-max 0.6mt sensitivity range (includes hysteresis) at ambient temperature. operating magnetic field ranges are available in 3 sens itivity level(h, m, l) as shown in the table below. unit: mt series name sensitivity hoff min hon max h 0.8 1.4 m 1.2 1.8 mrms311 l 1.6 2.2 improved temperature characteristics with built-in temperature-compensated circuit. ? hon = ? 0.20mt at ta-40 to+85[ o c] realized low voltage of operating(1.6 to 3.5v), low power consumption(typ 6w (vcc=1.8v)) detecting horizontal magnetic flux density. no dependence on magnetic field polarity. operating temperature 40 to +85 rohs compliant, halogen free
dimensions (unit: mm) fundemental operation direction of magnetic field circuit block performance performance characteristics (ta=253oc) operating require condition output voltage when power switch is on h = 0mt(magnetic flux density) {0 a/m (magnetic field strength)} hi-level when magnetic field is applied h ? 1.4mt (magnetic flux density) {1.1ka/m (magnetic field strength)} lo-level when magnetic field is applied h ? 0.8mt(magnetic flux density) {0.6ka/m (magnetic field strength)} hi-level la tch and switch cmos driver op-amp r2 r1 r4 r3 vcc gnd out the intermittent switch circuit inside r1-r4:mr elements temperature compensation circuit ? ? ? ? ? . b y 7 d d 0 v u ( o e
operating conditions recommended (ta = 253oc unless otherwise specified) item symbol condition min std max unit supply voltage - - 1.6 1.8 3.5 v supply current (avg) vcc=1.8v - 3.0 - a ambient temperature - - -40 25 85 oc voh vcc=1.8v iout=1ma 1.6 - - v output voltage vol vcc=1.8v iout=-1ma - - 0.2 v 253oc - - 1.4 hon -40 ? +85oc - - 1.6 253oc 0.8 - - operating magnetic field hoff -40 ? +85oc 0.6 - - mt (*1 *1) 1 [mt](si) = 10 [g] (cgs) absolute maximum ratings (ta=253oc unless otherwise specified) item condition specifications unit supply voltage - 6.0 v storage temperature - -40 ~ +125 oc esd protection human body model (hbm) tests according to: mil-std-883d method: 3015.7 limited values parameter symbol min max unit notes esd voltage v esd ? 4.0 kv r=1.5k
c=100pf t=25 ?
temperature characteristics recommended mount pad (unit: mm) nec corporation sales and marketing department (shin tamachi building) 34-6, shiba 5-chome, minato-ku, tokyo 108-0014, japan tel: +81-3-3798-5864 fax: +81-3-3798-5857 http://www.sw.nec.co.jp/on/dd/en/ ewv-19-0247-01e, july, 2009 copyright ? 2009 nec corporation nec electronics (europe) gmbh sales and marketing of semiconductors across europe arcadiastrasse 10, d-40472 dusseldorf, germany tel: +49-211-6503-0 fax:+49-211-6503-1344 nec corporation of america usa & canada) fiber optic division mail stop# nc1000 2880 scott blvd, santa clara, ca 95050, u.s.a. tel: +1-408-8445-1082 fax:+1-408-844-1090 sensitivity temperature characteristic (typical) 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 -50-30-101030507090 temperature [deg] operating magnetic flux density [mt] mrms*11l mrms*11m mrms*11h
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