AH172

AH172 Internal Pull-up Hall Effect Latch Features - 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 General Description 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 (Top view) 3. OUT 2. GND 1. VCC (SIP3 package) Pin Descriptions Name VCC GND OUT Description Positive power supply Ground Output stage 3. OUT GND 2. 1. VCC ( SOT23 package) Ordering Information AH172 X - X X X - X Wafer Body Blank or A~Z : if necessary to specify Package P: SIP3 W: SOT23 Lead L : Lead Free Blank: Normal Packing 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 REG. Rpu 3 AMP OUT 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 Anachip Corp. www.anachip.com.tw 2/6 Rev 0.4 May 7, 2004 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 Power dissipation SIP SOT23 Symbol VCC Values 20 20 25 -20~+85 -65~+150 550 230 Unit V V mA °C °C mW mW Vout (off) Io (sink) Top Tstg PD Electrical Characteristics Characteristics Supply voltage Output saturation voltage Supply current Internal pull-up resistor Dropout voltage Symbol Vcc Vout(sat) Icc Rpu Vd ( Ta= 25°C ) Conditions — VCC=12V, OUT ”ON” Io =10mA VCC=12V, OUT ”OFF” — Vd = Vcc-Vce Min. 3 — — 7 — Typ. — 300 3.5 10 — Max. 20 400 6 13 0.3 Unit V mV mA KΩ V Magnetic Characteristics (At Ta= 25°C ) (1mT = 10 Gauss) A grade Characteristics Operate Point Release Point Hysteresis B grade Characteristics Operate Point Release Point Hysteresis Symbol Bop Brp Bhy Min. 5 -80 Typ. 80 Max. 80 -5 Unit Gauss Gauss Gauss Symbol Bop Brp Bhy Min. 15 -60 Typ. 80 Max. 60 -15 Unit Gauss Gauss Gauss Anachip Corp. www.anachip.com.tw 3/6 Rev 0.4 May 7, 2004 AH172 Internal Pull-up Hall Effect Latch Operating Characteristics Vout ( Output Voltage ) Vcc High S S Marking side Vd Bhy Low Marking side N ( SOT23 ) N ( SIP3 ) Vsat Brp 0 Bop ( Magnetic flux density ) Marking Information (1) SOT23 (Top View) ID code A~Z: Non-Lead Free a~z : Lead Free J2 : AH172 Date code Y : Year M :Month (A~L) (2) SIP3 (Top View) 172 YWW X ID code A~Z: Non-Lead Free a~z : Lead Free Date code Y : Year WW : Nth week XX YM X Anachip Corp. www.anachip.com.tw 4/6 Rev 0.4 May 7, 2004 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 Active Area Depth 45º Sensor Location 0.38mm 0.7mm 1.57mm 1.47mm 0.41mm 0.41mm 3 4.17mm 4.04mm 1.27mm 2 1 1.82 mm 45º 3.10mm 2.97mm 15.50mm 13.00mm Package Dimension Anachip Corp. www.anachip.com.tw 5/6 Rev 0.4 May 7, 2004 AH172 Internal Pull-up Hall Effect Latch (2) Package Type: SOT23-3L D 2 ( Sensing point ) E 0.8mm HE 1 1.45mm 3 e1 e θ 1(4x) 0.10 C 3X SEATING PLANE θ 2(4x) b(3x) SEE VIEW C A2 GAUGE PLANE L θ A A1 L1 VIEW C 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 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 Anachip Corp. www.anachip.com.tw 6/6 Rev 0.4 May 7, 2004