LT140A SHARP | Alldatasheet
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In the absence of confirmation by device specification sheets, SHARP takes no responsibility for any defects that may occur in equipment using any SHARP devices shown in catalogs, data books, etc. Contact SHARP in order to obtain the latest device spcification sheets before using any SHARP device. n Features \ Small temperature coefficient of the Hall voltage \ Good linearity of the Hall voltage \ Small imbalanced voltage \ Directly DC voltage applicable n Applications \ Brushless motors VCR, CD, CD-ROM, FDD \ Measuring equipment Gauss meters, magnetic substance detectors \ Noncontact sensors Microswitches, tape-end detection \ Other magnetic detection n Outline Dimensions (Unit : mm) LT140A LT140A Hall Voltage 160mV Thin-Type Package GaAs Hall Device Hall Device Terminal connection 1 : VC Input 2 : VH Output 3 : VC Input 4 : VH Output 0.3 0.3 0.6 0.05±0.05 0.3 0.3 Silver Mark 0.9 1.45 1.40 2.45 1.45 1.40 0.50.50.6 0.4 0.2 0.14 +0.1-0.04 As for dimensions of tape-packaged products, refer to page 44 . Control voltage Power dissipation Operating temperature Storage temperature Soldering temperature*1 Symbol V C PD T opr T stg T sol Rating 150 -20 to +125 -55 to +150 260 Unit V mW Parameter *1 Soldering time : 10 seconds n Absolute Maximum Ratings (Ta=25˚C) Control current I C 15 mA n Electrical Characteristics (Ta=25˚C) No-load Hall voltage *1 Imbalanced ratio *2 Input resistance Output resistance Drift of imbalanced voltage vs. temperature Temperature coefficient of Hall voltage Temperature coefficient of input resistance Linearity of Hall voltage Symbol V H Rank A Rank B Rank C R IN R OUT |ΔV HO | β α γ Conditions V C =6V, B=100mT V C =6V,(B=0)/(B=100mT) IM =1mA, B=0mT IM =1mA, B=0mT V C =6V, B=0mT, T a=-20˚C to 25˚C V C =6V, B=0mT, T a=25˚C to 125˚C IC =6mA, B=100mT, T 1=-20˚C, T2=125˚C IM =1mA, B=0mT, T 1=-20˚C, T2=125˚C IC =6mA, B 1=50mT, B 2=100mT MIN. 145 650 1 300 TYP. 160 800 1 600 -0.04 0.2 0.3 MAX. 175 -12 950 1 900 Unit mV Ω Ω mV %/˚C %/˚C Parameter *1 No-load Hall voltage is nearly proportional to Vc (within the range of 1 to 6V) at temperatures of -20˚C to + 125˚C. Keep the voltage within the allowable power dissipation range. *2 Imbalanced ratio is in +/-12% within the range of Vc=1 to 6V. V H =V M -VHO V M :Observed Hall voltage V HO :Imbalanced voltage K H :Sensitivity α = β= 1 V H (T1) X X100{VH (T2)-VH (T1)} (T2-T1) XX 1001 R IN(T1) {RIN(T2)-RIN(T1)} (T2-T1) X2X100, γ= {K H (B2)-KH (B1)} {K H (B1)+K H (B2)} K H = V H (IC XB) V HO /VH
Fig. 1 Hall Voltage vs. Ambient Temperature Fig. 2 Input Resistance vs. Ambient Temperature Fig. 6 Power Dissipation vs. Ambient TemperatureFig. 5 Hall Voltage vs. Control Voltage Fig. 3 Hall Voltage vs. Magnetic Flux Density Fig. 4 Hall Voltage vs. Control Current LT140AHall Device B=0mT IM =1mA 0-20 0 80 40 120 2 000 1 600 1 200 800 400 Input resistance RIN (Ω ) Ambient temperature Ta (˚C) 0 08 0 40 120 160 200 200 160 120 Power dissipation PD (mW) Ambient temperature Ta (˚C) V C =6V T a=25˚C 00 800 400200 600 1 000 2 000 1 600 1 200 800 400 Hall voltage VH (mV) Magnetic flux density B (mT) B=100mT T a=25˚C 008 41 2 400 320 240 160 Hall voltage VH (mV) Control current IC (mA) B=100mT 0-20 0 80 40 120 200 160 120 Hall voltage VH (mV) Ambient temperature Ta (˚C) V C =6V IC =6mA B=100mT T a=25˚C 008 41 2 400 320 240 160 Hall voltage VH (mV) Control voltage VC (V)