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| AH1751 HALL EFFECT LATCH Features * * * * * * * * * Bipolar Hall Effect Latch Sensor 3.5V to 20V DC Operation Voltage Open Collector Pre-Driver 50mA Output Sink Current Chip Power Reverse-Connection Protection o o Operating Temperature: -40 C~125 C Package: SIP3 SIP3: Available in "Green" Molding Compound (No Br, Sb) Lead Free Finish/ RoHS Compliant (Note 1) General Description AH1751 is a single-digital-output Hall-effect sensor for high temperature operation. The device includes an on-chip Hall voltage generator for magnetic sensing, an amplifier to amplify Hall voltage, and a comparator to provide switching hysteresis for noise rejection, and an open-collector output pre-driver. An internal band-gap regulator is used to provide temperature compensated supply voltage for internal circuits and allows a wide operating supply range. While the magnetic flux density (B) is larger than threshold Bop, the OUT pin turns on (low). If B removed toward Brp, the OUT pin is latched "on" state prior to B < Brp. When B < Brp, the OUT pin go into " off " state. Applications * * * * Rotor Position Sensing Current Switch Encoder RPM Detection Ordering Information AH1751 - X X X - X Package P : SIP3 Lead Free G : Green Packing -A : Ammo (Note 3) -B : Bulk (Note 4) Magnetic Characteristics A Device AH1751-P Notes: Package Code P Packaging (Note 2) SIP3 Tube/Bulk Part Number Quantity Suffix 1000 -B Ammo Box Part Number Quantity Suffix 4000/Box -A 1. RoHS revision 13.2.2003. Glass and high temperature solder exemptions applied, see EU Directive Annex Notes 5 and 7. 2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf. 3. Ammo Box is for SIP3 Spread Lead. 4. Bulk is for SIP3 Straight Lead. AH1751 Rev. 1 - 2 1 of 6 www.diodes.com APRIL 2008 (c) Diodes Incorporated AH1751 HALL EFFECT LATCH Pin Assignment ( Top View ) 3. OUT 2. GND 1. VCC SIP3 Pin Descriptions Name VCC GND OUT Description Input Power Ground Output Stage Block Diagram VCC 1 REG. 3 AMP OUT 2 GND AH1751 Rev. 1 - 2 2 of 6 www.diodes.com APRIL 2008 (c) Diodes Incorporated AH1751 HALL EFFECT LATCH Absolute Maximum Ratings Symbol VCC Vout (off) Io (sink) TA TST TJ(MAX) PD (TA = 25C) Rating 20 20 100 -40~+125 -65~+150 +150 550 Unit V V mA C C C mW Parameter Supply Voltage Output "OFF " Voltage Output "ON" Current Operating Temperature Range Storage Temperature Range Maximum Junction Temperature Power Dissipation SIP3 Recommended Operating Conditions Symbol VCC Parameter Supply Voltage Conditions Operating (Note 5) Rating 3.5 ~ 20 Unit V Electrical Characteristics Symbol Vout (SAT) ICC Parameter Output Saturation Voltage Supply Current (TA = 25C) Conditions VCC = 12V, OUT "ON" Io = 50mA VCC = 12V, OUT "OFF" Min Typ. 200 3.5 Max 300 6 Unit mV mA Magnetic Characteristics A grade Symbol Bop Brp Bhy Notes: (TA = 25C, VCC = 4~20V) (1mT = 10 Gauss) Unit Gauss Gauss Gauss Parameter Operation Point Release Point Hysteresis Min 5 -70 - Typ. 75 Max 70 -5 - 5. Operating, the output is switching as magnetic field change (S>300G, N<-300G). 6. Magnetic characteristics are design information, which will vary with supply voltage, operating temperature and after soldering. AH1751 Rev. 1 - 2 3 of 6 www.diodes.com APRIL 2008 (c) Diodes Incorporated AH1751 HALL EFFECT LATCH Operating Characteristics Vout (Output Voltage) Vcc High S Marking side Vd Bhy Lo w T N (SIP3) V SA Brp 0 Bop ( Magnetic Flux Density ) Performance Characteristics TA (C) PD (mW) TA (C) PD (mW) P D (m W ) 600 500 400 300 200 100 0 0 25 50 75 100 125 150 T A ( C ) 25 550 105 198 50 440 110 176 60 396 115 154 70 352 120 132 80 308 125 110 85 286 130 88 90 264 135 66 95 242 140 44 100 220 150 0 P o w e r D is s ip a tio n C u rv e AH1751 Rev. 1 - 2 4 of 6 www.diodes.com APRIL 2008 (c) Diodes Incorporated AH1751 HALL EFFECT LATCH Marking Information ( Top View ) 1751 Y WW X : Year : "7" = 2007 "8" = 2008 WW : Nth Week 01~52 X : Internal code A~Z : Green Y SIP3 Package Information (All Dimensions in mm) (1) Package Type: SIP3 for Bulk pack 0.51m m NO M 2.00m m 1.15m m BRANDED S URFA CE 1 2 3 Active Area D epth Package Dimension Sensor Location AH1751 Rev. 1 - 2 5 of 6 www.diodes.com APRIL 2008 (c) Diodes Incorporated AH1751 HALL EFFECT LATCH Package Information (Continued) (2) Package Type: SIP3 for Ammo pack IMPORTANT NOTICE Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither does it convey any license under its patent rights, nor the rights of others. The user of products in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on our website, harmless against all damages. LIFE SUPPORT Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the President of Diodes Incorporated. AH1751 Rev. 1 - 2 6 of 6 www.diodes.com APRIL 2008 (c) Diodes Incorporated |
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