ATC ATS137 Single Hall Effect Switch Features General Description - 3.5V to 20V DC operation voltage - Temperature compensation - Wide operating voltage range - Open-Collector pre-driver - 25mA maximum sinking output current. - Reverse Polarity Protection ATS137 is an switched Hall-Effect IC which is for contactless switching applications. The device includes an on-chip Hall voltage generator for magnetic sensing, an amplifier that amplifies the Hall voltage, a schmitt trigger to provide switching hysteresis for noise rejection, and an open-collector output. The bandgap regulator allows a wide operating voltage range. ATS137 is rated for operating temperature range from -20°C to 85°C and voltage range from 3.5V to 20V. Applications - VCD/DVD loader, CD/DVD ROM - Cover detector - Speed measurement - Home appliances - Home safety Ordering Information ATS137 X - X X X - X Single Hall-effect Switch 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 Typical Circuit 3.5V ~20V RL Vcc ATS 137 DO Digital Output Vss 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.A5 Jul 14, 2004 1/7 ATC ATS137 Single Hall Effect Switch Functional Block Diagrams Vcc 1 Regulator Hall plate 3 DO Amp 2 Vss Pin Descriptions 2 137 Top view 137 1 : Vcc 1 3 2 : Vss 3 : DO 1 2 3 Name P/I/O Pin # Vcc Vss DO P P O 1 2 3 Anachip Corp. www.anachip.com.tw Description Positive Power Supply Ground Digital Output Rev. A5 Jul 14, 2004 2/7 ATC ATS137 Single Hall Effect Switch Absolute Maximum Ratings ( at Ta=25oC ) Characteristics Symbol Values Unit VCC VRCC B Vce Ic Ta Ts Tj 20 -20 V V Supply voltage Reverse Vcc Polarity Voltage Magnetic flux density Output OFF Voltage Output “on” current Continuous Operating temperature Storage temperature Maximum Junction Temp. SIP-3L Package Power Dissipation SOT23-3L Electrical Characteristics Characteristic Supply voltage Output saturation voltage Output leakage current Supply current Symbol Unlimited 30 25 -20~+85 -65~+150 175 400 200 Pd V mA °C °C °C mW mW (Ta=+ 25°C) Test Conditions Min Vcc — 3.5 - 20 V Vce(sat) Icex Icc Vcc=14V, Ic=20mA Vce=14V, Vcc=14V Vcc=20V, Output Open Vcc=14V, RL=820Ω, CL=20pF Vcc=14V, RL=820Ω, CL=20pF - 300 <0.1 5 700 10 10 mV uA mA - 0.3 1.5 us - 0.3 1.5 us Output rise time tr Output falling time tf Typ Max Units Test Circuit 14V DO RL RL=820 Ohm CL=20 pF CL Test Circuit Anachip Corp. www.anachip.com.tw Rev. A5 Jul 14, 2004 3/7 ATC ATS137 Single Hall Effect Switch Magnetic Characteristics (Ta=25oC) (1mT=10Gauss) A grade Parameter Operate Point Release point Hysteresis B grade Symbol Bop Brp Bhys Min. 10 - Typ. 80 Max. 100 - Unit Gauss Gauss Gauss Parameter Operate Point Release point Hysteresis Symbol Bop Brp Bhys Min. 10 - Typ. 80 Max. 130 - Unit Gauss Gauss Gauss Application Information -Operating principle ATS137 is a three pins Hall Effect switch IC which can turn magnetic flux variety to digital output signal. In other words, it is an interface from magnetic system to electrical one by Hall effect. The illustrations are shown in Fig.1. Vo Vcc Magnet Bhys Turn on Turn off Vce(sat) Brp magnetic flux (Gauss) Bop S Marking side electrical Fig.1 Hall-effect switch Output driver is open-collector topology and maximum sink current (Isink) is 25mA. The illustrated circuit is shown as Fig.2. 3.5V ~20V Vcc RL Vo DO ATS 137S Digital Output Isink Vss Fig.2 Application circuit Anachip Corp. www.anachip.com.tw Rev. A5 Jul 14, 2004 4/7 ATC ATS137 Single Hall Effect Switch Application Information (Continued) Vo will turn on(low) if the S magnetic flux larger than operation point (Bop), and turns off whenever the magnetic flux is removed and lower than release point (Brp). The related waveforms are shown in Fig.3. magnetic flux (mT) Bop Brp S Marking side t Vo Hall Effect switch Vcc Vce(sat) t Fig.3 Vo and magnetic flux variety The major applications are for contactless switching and shown as follows: - VCD/DVD loader, CD/DVD ROM: Detect if the tray is opened or closed - Cover detector (open/close): Cellular phone cover detector, Refrigerator door detector, Microwave oven door sensor… etc - Home safety: instead of reed relay to detect the situation of door/window. - Due to contactless and without mechanical contact point, its reliability and life cycle are much longer than reed relay. In addition, its switching speed is much faster than mechanical devices. Anachip Corp. www.anachip.com.tw Rev. A5 Jul 14, 2004 5/7 ATC ATS137 Single Hall Effect Switch Marking Information (1) SOT23 (2) SIP3 (Top View) XX YM X (Top View) ID code A~Z: Non-Lead Free a~z: Lead Free ID code A~Z: Non-Lead Free a~z : Lead Free 137 YWW X JA: ATS137 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 2.10mm 1.55mm 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. A5 Jul 14, 2004 6/7 ATC ATS137 Single Hall Effect Switch Package Information (Continued) (2)Package Type: SOT23-3L D 2 HE E ( Sensing point ) 0.8mm 1 3 SEE VIEW C 1.45mm e1 e £c1(4x) 3X GAUGE PLANE A A2 0.10 C L £c2(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 £c 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. A5 Jul 14, 2004 7/7