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| Hall IC LT251A LT251A 2.90.2 1.9 GaAs Hall IC for Noncontact Swich (Unidirectional magnetic field-type) (Unit : mm) 2 0.4 3 0.4 0.95 s Features s Outline Dimensions 2.70.3 Operation by small magnet due to high sensitivity Operating point<30mT Y Combining a GaAs Hall device and an IC in a compact 1 4 package (2.9X1.5X1.1mm) Wide operation temperature range obtained by GaAs Hall device (-20 to +125C) Long life time due to noncontact-type 0.4 0.6 0.85 S Z X s Applications FDD HDD Water meter Car stereo Microswitch, etc. 0.16+0.10 -0.06 1.1-0.1 0.8 +0.2 4-R0.2 Hall device center line X : +0.050.23mm against package center Y : -0.050.1mm against package lead center between No.2 and No.3 terminals Z : 0.810.15mm from package surface Terminal connections 1.50.2 0.6 0.6 REG Hall + device H 0.3 - s Absolute Maximum Ratings Parameter Supply voltage Output voltage Output current Power dissipation Operating temperature Storage temperature Soldering temperature*1 *1 Soldering time : within 10 seconds (Ta=25C) Unit V V mA mW C C C Symbol Rating VCC 18 VOUT 18 IO 5 PD 100 Topr -20 to +125 -55 to +150 Tstg 260 Tsol 1 : VCC 2 : VOUT 3 : Don't use. *No.3 terminal and the section of leads (both sides 4 : GND of package in X direction) are connected with the terminal of internal IC. Be careful in connecting other circuits. As for dimensions of tape-packaged products, refer to page 44 . s Operating Explanation Output voltage 0 BRP BOP (0to0.15) +B Magnetic flux density s Electrical Characteristics Parameter Operating magnetic flux density Hysteresis breadth Operating voltage Supply current Low level output voltage High level output voltage Output short circuit current Operating point temperature drift Symbol BOP BRP BH VCC ICC VOL VOH IOS BOP Conditions VCC=16V MIN. 11 10 1 4.5 13.9 -1.55 TYP. 2.0 2.5 MAX. 30 29 5 16 10.5 0.4 -0.80 4.5 8.0 (Ta=25C) Unit mT mT mT V mA V V mA mT mT VCC=16V, B=<10mT VCC=16V, IO=4mA, B>=30mT VCC=16V, IO=-100A, B=<10mT VCC=16V VCC=16V, Ta=-5C to+60C VCC=16V, Ta=-20C to+80C 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. 2.90.2 Hall IC Fig. 1 Operating magnetic flux density B (mT) LT251A Operating Magnetic Flux Density vs. Supply Voltage Ta=25C Fig. 2 Operating magnetic flux density B (mT) Operating Magnetic Flux Density vs. Ambient Temperature VCC=16V 24 20 16 12 8 4 0 0 4 8 12 16 Supply voltage VCC (V) 20 BRP BOP 24 20 16 12 8 4 0 -40 0 40 80 120 Ambient temperature Ta (C) BRP BOP Fig. 3 10 8 6 4 2 Supply Current vs. Supply Voltage B=<10mT Ta=25C Fig. 4 10 8 6 4 2 Supply Current vs. Ambient Temperature VCC=16V B=<10mT Supply current ICC (mA) 0 Supply current ICC (mA) 0 4 8 12 16 Supply voltage VCC (V) 20 0 -40 0 40 80 120 Ambient temperature Ta (C) Fig. 5 1.0 Low level output voltage VOL (V) Low Level Output Voltage vs. Output Current VCC=16V B>=30mT Ta=25C Fig. 6 1.0 Low Level Output Voltage vs. Ambient Temperature VCC=16V IO=4mA B>=30mT Low level output voltage VOL (V) 0.8 0.6 0.4 .02 0.8 0.6 0.4 0.2 0 0 1 2 3 4 Output current IO (mA) 5 0 -40 0 40 80 120 Ambient temperature Ta (C) |
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