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| AH373 Internal Pull-up Hall Effect Latch Features - Bipolar Hall effect latch sensor - 2.2V to 20V DC operation voltage - Built-in pull-up resistor - 25mA output sink current - Operating temperature: -40C ~ +125C - Package: SIP3, SOT23 General Description AH373 is a single-digital-output Hall-effect sensor with pull-up resistor 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 output driver with a pull-up resistor (Rpu). An internal bandgap 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 operate point (Bop), the OUT pin turns on (low). If B moves toward release point (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 Pin Assignment Pin Descriptions Name Description Positive Power Supply Ground Output Pin 373 2 373 1 3 VCC (Top view) 1 : VCC 2 : GND 3 : OUT GND OUT ( SOT23 package) 123 (SIP3 package) Ordering Information AH373 X - X X X Wafer Body Blank or A~Z : if necessary to specify Package P: SIP-3L W: SOT23-3L Lead L : Lead Free Blank: Normal Packing Blank : Tube or Bulk A : Tape & Reel This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product. Rev. 0.0 Jan 31, 2005 1/6 AH373 Internal Pull-up Hall Effect Latch Block Diagram VCC 1 Regulator Hall plate Rpu 3 2 OUT Amp 2 GND Functional Application Circuit IA IB M Digital Hall Effect Sensor M: Three Phase Hall Motor Driver & Control Logic IC Ia Ib Ic RPM sensing HA HB HC Hall Motor Driver 3 Phase Hall Motor Absolute Maximum Ratings ( at Ta= 25C ) Characteristics Supply voltage Output "off " voltage Output "on" current Operating temperature range Storage temperature range Power dissipation SIP SOT23 Symbol VCC Vout (off) Io (sink) Top Tstg PD Values 20 28 25 -40~+125 -65~+150 550 230 Unit V V mA C C mW mW Anachip Corp. www.anachip.com.tw 2/6 Rev 0.0 Jan 31, 2005 AH373 Internal Pull-up Hall Effect Latch Electrical Characteristics ( Ta= 25C, Vcc=12V ) Characteristics Supply voltage Output saturation voltage Output Leakage Current Supply current Internal pull-up resistor Symbol Vcc Vout(sat) Ioff Icc Rpu Conditions -- Iout =20mA B < Brp OUT "OFF" -- Min. 2.2* 7 Typ. 300 <0.1 2 10 Max. 20 400 10 4 13 Unit V mV uA mA K *Note: The output of IC will be switched after the supply voltage is over 2.2V, but the magnetic characteristics won't be normal until the supply is over 2.5V. Magnetic Characteristics Parameter Operate Point Release Point Hysteresis (Ta=25C, Vcc=2.5V to 20V) Symbol Bop Brp Bhys Min. 5 -60 Typ. 30 -30 60 (1mT=10Gauss) Max. Unit 60 Gauss -5 Gauss Gauss Operating Characteristics Output S S Marking side ( Output Voltage ) ( off-state ) Vcc Turn off Bhy Turn on ( on-state ) Marking side N ( SOT23 ) N ( SIP3 ) Vsat Brp 0 Bop Vsat ( Magnetic flux density B ) Anachip Corp. www.anachip.com.tw 3/6 Rev 0.0 Jan 31, 2005 AH373 Internal Pull-up Hall Effect Latch Performance Characteristics (SIP3) Ta (C) Pd (mW) Ta (C) Pd (mW) 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 d (m W ) 600 500 400 300 200 100 0 0 25 P o w e r D is s ip a tio n C u rv e 50 75 100 125 150 T a ( C ) Performance Characteristics (SOT23-3) Ta (C) Pd (mW) 25 230 50 184 60 166 70 147 80 129 90 110 100 92 110 74 120 55 125 46 130 37 140 18 150 0 P d (m W ) P o w e r D is s ip a tio n C u rv e 300 200 100 0 0 25 50 75 100 125 150 T a ( C ) Anachip Corp. www.anachip.com.tw 4/6 Rev 0.0 Jan 31, 2005 AH373 Internal Pull-up Hall Effect Latch Marking Information (1) SIP3 (Top View) 373 YWW X ID Code: A~Z: Non-Lead Free a~z : Lead Free Date code Y : Year WW : Nth week (2) SOT23 (Top View) ID code A~Z: Non-Lead Free a~z: Lead Free P2:AH373 Date code Y : Year M :Month(A~L) XX YM X Package Information (1) Package Type: SIP-3L 0.51mm NOM 2.00mm 1.15mm BRANDED SURFACE 1 2 3 Active Area Depth Sensor Location Package Dimension 45 0.38mm 0.7mm 1.57mm 1.47mm 0.41mm 0.41mm 3 4.17mm 4.04mm 1.27mm 2 1 1.82 mm 45 3.10mm 2.97mm 15.50mm 13.00mm Anachip Corp. www.anachip.com.tw 5/6 Rev 0.0 Jan 31, 2005 AH373 Internal Pull-up Hall Effect Latch (2) Package Type: SOT23-3L D 2 ( Sensing point ) E 0.8mm HE M 1 1.45mm 3 e1 e 1(4x) SEE VIEW C A2 3X SEATING PLANE 2(4x) A 0.10 C GAUGE PLANE L A1 L1 b(3x) VIEW C Symbol A A1 A2 b C D E HE L L1 M e e1 1 2 Dimensions In Millimeters Min. 1.05 0.05 1.00 0.25 0.08 2.70 1.50 2.60 0.30 0.50 0.73 1.80 0.85 0o 3o 6o Nom. 1.10 2.90 1.60 2.80 0.60 0.78 1.90 0.95 5o 5o 8o Max. 1.35 0.15 1.20 0.50 0.20 3.00 1.70 3.00 0.55 0.70 0.83 2.00 1.05 10o 7o 10o Dimensions In Inches Min. 0.041 0.002 0.039 0.010 0.003 0.106 0.059 0.102 0.012 0.020 0.029 0.071 0.033 0o 3o 6o Nom. 0.043 0.114 0.063 0.110 0.024 0.031 0.075 0.037 5o 5o 8o Max. 0.053 0.006 0.047 0.020 0.008 0.118 0.067 0.118 0.022 0.028 0.033 0.079 0.041 10o 7o 10o Anachip Corp. www.anachip.com.tw 6/6 Rev 0.0 Jan 31, 2005 |
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