AH172 Internal Pull-up Hall Effect Latch Features General Description - Bipolar Hall effect latch sensor - 3.0V to 20V DC operation voltage - Built-in pull-up resistor - 25mA output sink current - Operating temperature: -20°C to 85°C - Package: SIP3, SOT23 AH172 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 removed 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 Assignments Pin Descriptions (Top view) Name Description 3. OUT VCC Positive power supply 2. GND GND Ground 1. VCC OUT Output stage (SIP3 package) 3. OUT GND 2. 1. VCC ( SOT23 package) Ordering Information AH172 X - X X X - X Wafer Body Package Lead Packing Blank or A~Z : if necessary to specify P: SIP3 W: SOT23 L : Lead Free Blank: Normal Blank : Tube or Bulk A : Tape & Reel Magnetic Characteristics A or B 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. 0.4 May 7, 2004 1/6 AH172 Internal Pull-up Hall Effect Latch Block Diagram VCC 1 Rpu REG. 3 OUT 2 GND AMP 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 Anachip Corp. www.anachip.com.tw Rev 0.4 May 7, 2004 2/6 AH172 Internal Pull-up Hall Effect Latch Absolute Maximum Ratings ( at Ta= 25°C ) Characteristics Supply voltage Output “off ” voltage Output “on” current Operating temperature range Storage temperature range Output saturation voltage Supply current Internal pull-up resistor Dropout voltage Unit VCC 20 20 25 -20~+85 -65~+150 550 230 V V mA SIP SOT23 Electrical Characteristics Supply voltage Values Vout (off) Io (sink) Top Tstg Power dissipation Characteristics Symbol PD °C °C mW mW ( Ta= 25°C ) Symbol Conditions Min. Typ. Max. Unit Vcc — VCC=12V, OUT ”ON” Io =10mA VCC=12V, OUT ”OFF” — Vd = Vcc-Vce 3 — 20 V — 300 400 mV — 7 — 3.5 10 — 6 13 0.3 mA Vout(sat) Icc Rpu Vd KΩ V Magnetic Characteristics (At Ta= 25°C ) (1mT = 10 Gauss) A grade Characteristics Symbol Min. Typ. Max. Unit Operate Point Bop 15 - 60 Gauss Release Point Brp -60 - -15 Gauss Hysteresis Bhy - 80 - Gauss Symbol Min. Typ. Max. Unit B grade Characteristics Operate Point Bop 5 - 80 Gauss Release Point Brp -80 - -5 Gauss Hysteresis Bhy - 80 - Gauss Anachip Corp. www.anachip.com.tw Rev 0.4 May 7, 2004 3/6 AH172 Internal Pull-up Hall Effect Latch Operating Characteristics S S Marking side Marking side N N ( SOT23 ) ( Output Voltage ) Vout Vcc Vd High Bhy Low Vsat ( SIP3 ) Brp 0 Bop ( Magnetic flux density ) Marking Information (1) SOT23 (Top View) XX YM X (2) SIP3 (Top View) ID code A~Z: Non-Lead Free a~z : Lead Free 172 YWW X J2 : AH172 Date code Y : Year M :Month (A~L) ID code A~Z: Non-Lead Free a~z : Lead Free Date code Y : Year WW : Nth week Anachip Corp. www.anachip.com.tw Rev 0.4 May 7, 2004 4/6 AH172 Internal Pull-up Hall Effect Latch Package Information (1) Package Type: SIP-3L 0.51mm NOM 2.10mm 1.55mm BRANDED SURFACE 1 2 3 Sensor Location Active Area Depth 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 1.82 mm 15.50mm 13.00mm Package Dimension Anachip Corp. www.anachip.com.tw Rev 0.4 May 7, 2004 5/6 AH172 Internal Pull-up Hall Effect Latch (2) Package Type: SOT23-3L D 2 HE E ( Sensing point ) 0.8mm 1 3 SEE VIEW C 1.45mm e1 e θ 1(4x) 3X GAUGE PLANE A A2 0.10 C L θ 2(4x) VIEW C b(3x) Symbol A A1 A2 b C D E HE L L1 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 1.80 0.85 0o 3o 6o Nom. 1.10 2.90 1.60 2.80 0.60 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 2.00 1.05 10o 7o 10o Anachip Corp. www.anachip.com.tw θ L1 A1 SEATING PLANE Dimensions In Inches Min. 0.041 0.002 0.039 0.010 0.003 0.106 0.059 0.102 0.012 0.020 0.071 0.033 0o 3o 6o Nom. 0.043 0.114 0.063 0.110 0.024 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 0.079 0.041 10o 7o 10o Rev 0.4 May 7, 2004 6/6