AH373 Internal Pull-up Hall Effect Latch Features General Description - Bipolar Hall effect latch sensor - 2.2V to 20V DC operation voltage - Built-in pull-up resistor - 25mA output sink current - Operating temperature: −40°C ~ +125°C - Package: SIP3, SOT23 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 Descriptions Pin Assignment 373 2 (Top view) 373 1 : VCC 1 3 Name Description VCC Positive Power Supply GND Ground OUT Output Pin 2 : GND ( SOT23 package) 3 : OUT 1 2 3 (SIP3 package) Ordering Information AH373 X - X X X Wafer Body Package Lead Packing Blank or A~Z : if necessary to specify P: SIP-3L W: SOT23-3L L : Lead Free Blank: Normal 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 Rpu Regulator 23 OUT Hall plate Amp 2 GND Functional Application Circuit IA IB M Digital Hall Effect Sensor IC Driver M: Three Phase Hall Motor Ia Ib Ic & Control Logic HA RPM sensing HB HC Hall Motor Driver 3 Phase Hall Motor Absolute Maximum Ratings ( at Ta= 25°C ) Characteristics Symbol VCC Vout (off) Io (sink) Top Tstg Supply voltage Output “off ” voltage Output “on” current Operating temperature range Storage temperature range Power dissipation SIP SOT23 PD Anachip Corp. www.anachip.com.tw Values 20 28 25 -40~+125 -65~+150 550 230 Unit V V mA °C °C mW mW Rev 0.0 Jan 31, 2005 2/6 AH373 Internal Pull-up Hall Effect Latch Electrical Characteristics ( Ta= 25°C, 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 KΩ *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 (Ta=25°C, Vcc=2.5V to 20V) Parameter Operate Point Release Point Hysteresis Symbol Bop Brp Bhys Min. 5 -60 - (1mT=10Gauss) Max. Unit 60 Gauss -5 Gauss Gauss Typ. 30 -30 60 Operating Characteristics S S Marking side Marking side N N ( SOT23 ) ( SIP3 ) ( Output Voltage ) Output Vcc ( off-state ) Turn off Bhy Turn on ( on-state ) Vsat Vsat Brp 0 Bop ( Magnetic flux density B ) Anachip Corp. www.anachip.com.tw Rev 0.0 Jan 31, 2005 3/6 AH373 Internal Pull-up Hall Effect Latch Performance Characteristics (SIP3) 25 550 105 198 Ta (°C) Pd (mW) Ta (°C) Pd (mW) 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 P d (m W ) 600 500 400 300 200 100 0 0 25 50 75 100 125 150 T a (。 C ) Performance Characteristics (SOT23-3) Ta (°C) 25 50 60 70 80 90 100 110 120 125 130 140 150 Pd (mW) 230 184 166 147 129 110 92 74 55 46 37 18 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 Rev 0.0 Jan 31, 2005 4/6 AH373 Internal Pull-up Hall Effect Latch Marking Information (1) SIP3 (2) SOT23 (Top View) (Top View) ID Code: A~Z: Non-Lead Free a~z : Lead Free 373 YWW X ID code A~Z: Non-Lead Free a~z: Lead Free XX YM X P2:AH373 Date code Y : Year M :Month(A~L) Date code Y : Year WW : Nth week Package Information (1) Package Type: SIP-3L 0.51mm NOM 2.00mm 1.15mm BRANDED SURFACE 1 2 3 Sensor Location Active Area Depth Package Dimension 45º 0.38mm 0.7mm 1.57mm 1.47mm 0.41mm 0.41mm 3 1.27mm 4.17mm 4.04mm 2 1 45º 3.10mm 2.97mm Anachip Corp. www.anachip.com.tw 1.82 mm 15.50mm 13.00mm Rev 0.0 Jan 31, 2005 5/6 AH373 Internal Pull-up Hall Effect Latch (2) Package Type: SOT23-3L D 2 HE E M ( Sensing point ) 0.8mm 1 3 SEE VIEW C 1.45mm e1 e θ1(4x) 3X GAUGE PLANE A A2 0.10 C L SEATING PLANE A1 θ 2(4x) VIEW C b(3x) Symbol A A1 A2 b C D E HE L L1 M e e1 θ θ1 θ2 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 Anachip Corp. www.anachip.com.tw θ L1 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 Rev 0.0 Jan 31, 2005 6/6