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ATS137 Dataheets PDF



Part Number ATS137
Manufacturers Anachip
Logo Anachip
Description Single Hall Effect Switch
Datasheet ATS137 DatasheetATS137 Datasheet (PDF)

ATC Single Hall Effect Switch Features - 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 General Description 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 switch.

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ATC Single Hall Effect Switch Features - 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 General Description 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 Magnetic Characteristics A or B Single Hall-effect Switch 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 Typical Circuit 3.5V ~20V Vcc RL ATS 137 Vss DO Digital Output 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 Single Hall Effect Switch Functional Block Diagrams Vcc 1 ATS137 Regulator Hall plate Amp 3 DO 2 Vss Pin Descriptions 137 2 Top view 137 1 : Vcc 1 3 2 : Vss 3 : DO 1 2 3 Name Vcc Vss DO P/I/O P P O Pin # 1 2 3 Description Positive Power Supply Ground Digital Output Anachip Corp. www.anachip.com.tw 2/7 Rev. A5 Jul 14, 2004 ATC Single Hall Effect Switch Absolute Maximum Ratings Characteristics 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 ( at Ta=25oC ) Symbol VCC VRCC B Vce Ic Ta Ts Tj Pd (Ta=+ 25°C) Test Conditions — Vcc=14V, Ic=20mA Vce=14V, Vcc=14V Vcc=20V, Output Open Vcc=14V, RL=820Ω, CL=20pF Vcc=14V, RL=820Ω, CL=20pF Min 3.5 Typ 300 <0.1 5 0.3 0.3 Max 20 700 10 10 1.5 1.5 Units V mV uA mA us us Values 20 -20 Unlimited 30 25 -20~+85 -65~+150 175 400 200 Unit V V V mA °C °C °C mW mW ATS137 Electrical Characteristics Characteristic Supply voltage Output saturation voltage Output leakage current Supply current Output rise time Output falling time Symbol Vcc Vce(sat) Icex Icc tr tf Test Circuit 14V DO RL RL=820 Ohm CL=20 pF CL Test Circuit Anachip Corp. www.anachip.com.tw 3/7 Rev. A5 Jul 14, 2004 ATC Single Hall Effect Switch Magnetic Characteristics (Ta=25oC) (1mT=10Gauss) A grade Parameter Operate Point Release point Hysteresis B grade Parameter Operate Point Release point Hysteresis Symbol Bop Brp Bhys Symbol Bop Brp Bhys Min. 10 Min. 10 Typ. 80 Typ. 80 Max. 100 Max. 130 Unit Gauss Gauss Gauss Unit Gauss Gauss Gauss ATS137 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 Bhys Magnet Turn on magnetic flux (Gauss) S Turn off Vce(sat) Marking side Brp Bop 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 DO Vo ATS 137S Vss Isink Digital Output Fig.2 Application circuit Anachip Corp. www.anachip.com.tw 4/7 Rev. A5 Jul 14, 2004 ATC 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. ATS137 magnetic flux (mT) Bop S Marking side Vo Hall Effect switch Vcc Vce(sat) t t Brp 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 5/7 Rev. A5 Jul 14, 2004 ATC Single Hall Effect Switch Marking Information (1) SOT23 (Top View) ID code A~Z: Non-Lead Free a~z: Lead Free JA: ATS137 Date code Y : Year M : Month (A~L) ATS137 (2) SIP3 (Top View) 137 Y.


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