Preliminary Datasheet LINEAR HALL-EFFECT IC AH49E General Description Features The AH49E is a small, versatile linear Hall-effect device that is operated by the magnetic field from a permanent magnet or an electromagnet. The output voltage is set by the supply voltage and varies in proportion to the strength of the magnetic field. · · · · · The integrated circuitry features low noise output, which makes it unnecessary to use external filtering. It also includes precision resistors to provide increased temperature stability and accuracy. The operating temperature range of these linear Hall sensors is -40oC to 85oC, appropriate for commercial, consumer and industrial applications. · · · Miniature Construction Power Consumption of 3.5mA at VCC=5V for Energy Efficiency Single Current Sourcing Output Linear Output for Circuit Design Flexibility Low Noise Output Virtually Eliminates the Need for Filtering A Stable and Accurate Output Temperature Range of -40oC to 85oC Responds to Either Positive or Negative Gauss Applications The AH49E is available in standard TO-92S package. · · · · · · · · Current Sensing Motor Control Position Sensing Magnetic Code Reading Ferrous Metal Detector Vibration Sensing Liquid Level Sensing Weight Sensing TO-92S Figure 1. Package Type of AH49E Jun. 2008 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 1 Preliminary Datasheet LINEAR HALL-EFFECT IC AH49E Pin Configuration Z3 Package (TO-92S ) 3 OUT 2 GND 1 VCC Figure 2. Pin Configuration of AH49E (Bottom View) Pin Description Pin Number Pin Name Function 1 VCC 2 GND Ground pin 3 OUT Output Supply voltage Jun. 2008 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 2 Preliminary Datasheet LINEAR HALL-EFFECT IC AH49E Functional Block Diagram 1 HALL Sensor VCC 3 Amplifier OUT 65µA Typ. 2 GND Figure 3. Functional Block Diagram of AH49E Ordering Information AH49E - Circuit Type E1: Lead Free G1: Green Package Blank: Bulk Z3: TO-92S Package Temperature Range TO-92S -40 to 85oC Part Number Lead Free AH49EZ3-E1 Green AH49EZ3-G1 Marking ID Lead Free AH49E Green AH49G Packing Type Bulk BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Products with "G1" suffix are available in green package. Jun. 2008 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 3 Preliminary Datasheet LINEAR HALL-EFFECT IC AH49E Absolute Maximum Ratings (Note 1) Parameter Symbol Value Unit Supply Voltage VCC 8 V Output Current IO 10 mA Operating Temperature TA -40 to 100 o TSTG -50 to 150 oC 3000 V Storage Temperature Range ESD (Human Body Model) C Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods may affect device reliability. Recommended Operating Conditions Parameter Symbol Min Max Unit Supply Voltage VCC 3.0 6.5 V Operating Temperature TOP -40 85 o Jun. 2008 Rev. 1. 1 C BCD Semiconductor Manufacturing Limited 4 Preliminary Datasheet LINEAR HALL-EFFECT IC AH49E Electrical Characteristics (VCC=5V, TA=25oC, unless otherwise specified.) Parameter Supply Current Quiescent Output Voltage Symbol Conditions Min ICC VNULL Output Voltage Sensitivity Output Voltage Span VOS Output Resistor RO Magnetic Field Range B Max Unit 3.5 4.5 mA @ B=0GS 2.25 2.5 2.75 V B=0GS to ±1000GS 1.1 1.6 2.1 mV/GS 1.0 to (VCC-1.0) 0.8 to (VCC-0.8) V 60 ±650 Linearity of Span Output Noise Typ BW=10Hz to 10kHz 120 Ω ±1000 GS 0.7 % 90 µV Transfer Characteristics (VCC=5V) When there is no ouside magnetic field (B=0GS), the quiescent output voltage is one-half the supply voltage in general. If a south magnetic pole approches to the front face (the side with marking ID) of the Halleffect sensor, the circuit will drive the output voltage higher. Contrary, a north magnetic pole will drive the output voltage lower. The variations of voltage level up or down are symmetrical. V Typical Output Voltage 4.0 V 2.5 V Greatest magnetic sensitivity is obtained with a supply voltage of 6V, but at the cost of increased supply current and a slight loss of output symmetry. So, it is not recommended to work in such condition unless the output voltage magnitude is a main issue. The output signal can be capacitively coupled to an amplifier for boosting further if the changing frequency of the magnetic field is high. 1.0 V -1000 -500 0 B (Gauss) 500 1000 Figure 4. The Transfer Characteristics of AH49E Jun. 2008 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 5 Preliminary Datasheet LINEAR HALL-EFFECT IC AH49E Typical Performance Characteristics 5 5 B=0GS No load VCC=5V No load 4 4 3 VOUT(V) VOUT(V) 3 2 2 1 1 0 0 -1000 -500 0 500 1000 2 3 4 5 6 7 8 VCC(V) B(GS) Figure 5. Output Voltage vs. Magnetic Field Figure 6. Output Voltage vs. Supply Voltage 5 VCC=5V B=0GS No load 4 VOUT(V) 3 2 1 0 -50 0 50 100 O TA( C) Figure 7. Output Voltage vs. Ambient Temperature Jun. 2008 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 6 Preliminary Datasheet LINEAR HALL-EFFECT IC AH49E Mechanical Dimensions TO-92S ° ° 44 46 Unit: mm(inch) 0.710(0.028) 0.810(0.032) 1.480(0.058) 1.680(0.066) 4.000(0.157) 4.200(0.165) 1.350(0.053) 1.050(0.041) 2.200(0.087) 1.900(0.075) 3.080(0.121) 3.280(0.129) Package Sensor Location 2.200(0.087) 2.400(0.094) 0.440(0.017) TYP 13.500(0.531) 14.500(0.571) 1.270(0.050) TYP Jun. 2008 Rev. 1. 1 0.380(0.015) TYP BCD Semiconductor Manufacturing Limited 7 BCD Semiconductor Manufacturing Limited http://www.bcdsemi.com IMPORTANT NOTICE BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifications herein. 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