US5781 CMOS High Sensitivity Switch Preliminary Datasheet Features and Benefits • • • • Applications • • • • y r a in il m e r P Chopper stabilized amplifier stage New miniature package / thin, high reliability package Operation down to 3.5V CMOS for optimum stability, quality, and cost Solid state switch Limit switch Current limit Interrupter Ordering Information Part No. US5781 US5781 Temperature Suffix E L Package SO or UA SO or UA Functional Diagram V DD Description The US5781 is a unipolar Hall effect sensor IC fabricated from mixed signal CMOS technology. It incorporates advanced chopper stabilization techniques to provide accurate and stable magnetic switch points. There are many applications for this sensor in addition to those listed above. The design, specifications and performance have been optimized for applications of solid state switches. Output Voltage Regulator The output transistor will be switched on (BOP) in the presence of a sufficiently strong South pole magnetic field facing the marked side of the package. Similarly, the output will be switched off (BRP) in the presence of a weaker South field and remain off with “0” field. The SOT-23 device is reversed from the UA package. The SOT-23 output transistor will be switched on (BOP) in the presence of a sufficiently strong North pole magnetic field subjected to the marked face. Chopper GND UA Package Pin 1 - V D D Pin 2 - GND Pin 3 - Output Temperature Range -40°C to 85°C Extended -40°C to 150°C Automotive SO Package Pin 1 - VD D Pin 2 - Output Pin 3 - GND Note: This is a static-sensitive device; please observe ESD precau tions. Reverse VDD protection is not included. For reverse voltage protection, a 100Ωresistor in series with VDD is recommended. US5781 CMOS High Sensitivity Switch 3901005781 Rev 1.7 7/23/01 Page 1 US5781 CMOS High Sensitivity Switch Preliminary Datasheet US5781 Electrical Specifications DC operating parameters: TA = -40 to 150oC, VDD = 12V DC (unless otherwise specified). Parameter Symbol Test Conditions Min Supply Voltage VDD Operating 3.5 Supply Current IDD B<BRP 0.5 Saturation Voltage VDS(on) Output Leakage Typ Max Units 24 V 2.5 5.0 mA IOUT = 20 mA, B>BOP 0.3 0.5 V IOFF B<BRP, VOUT = 27V 0.01 5.0 ìA Output Rise Time tr VDD = 12V, RL = 1.1KÙ, CL = 20pf 0.04 ìs Output Fall Time tf VDD = 12V, RL = 1.1KÙ, CL = 20pf 0.18 ìs US5781 Magnetic Specifications Magnetic operating parameters: TA = -40 to 150oC, VDD =12 VDC (unless otherwise specified). Parameter Symbol Test Conditions Min Typ Max Units Operating Point BOP 7.0 12.0 15.0 mT Release Point BRP 3.5 7.0 10.0 mT Hysteresis Bhys 2.0 5.0 7.0 mT Note: 1 mT = 10 Gauss. Melexis Inc. reserves the right to make changes without further notice to any products herein to improve reliability, function o r design. Melexis does not assume any liability arising from the use of any product or application of any product or circuit described herein. US5781 CMOS High Sensitivity Switch 3901005781 Rev 1.7 7/23/01 Page 2 US5781 CMOS High Sensitivity Switch Preliminary Datasheet Performance Graphs Typical Magnetic Switch Points versus Supply Voltage Typical Magnetic Switch Points versus Temperature 5781 14.0 5781 14 12 Flux Density (mT) Flux Density (mT) 12.0 BOP 10.0 BOP 9 8.0 BRP 6 BHy S BRP 6.0 3 4.0 0 0 5 10 15 20 25 30 -40 0 40 Supply Voltage (V) 150 Output Voltage versus Flux Density 5781 14 120 Temperature (ºC) Min/Max Magnetic Switch Range Versus Temperature 16 80 5781 30 BOP Max V DD 12 10 BRP Max 8 6 BOP Min Output Voltage (V) Flux Density mV/mT 24 18 B OP 12 4 B RP 6 BRP Min 2 0 V out 0 -40 -20 0 20 40 60 80 100 120 140 -20 Temperature C° US5781 CMOS High Sensitivity Switch -10 0 10 20 30 40 Flux Density (mT) 3901005781 Rev 1.7 7/23/01 Page 3 US5781 CMOS High Sensitivity Switch Preliminary Datasheet Performance Graphs Typical Saturation Voltage versus Temperature VDD = 12 V, I OUT = 20mA Typical Supply Current versus Supply Voltage 5781 5 5781 500 4 400 VDS(ON) VDS(ON) (mV) Supply Current (mA) TA = -40oC 3 TA = 25 oC 2 300 200 TA = 125oC 1 100 0 0 0 5 10 15 20 25 30 -40 0 120 160 200 Temperature ( C) Power Dissipation versus Temperature Wave Soldering Parameters All Devices All Devices 280 400 260 UA Package R θJA =206oC/W Solder Temperature (oC) Package Power Dissipation (mW) 80 o Supply Voltage (V) 500 40 300 200 100 240 220 200 SO Package RθJA =575oC/W 0 -40 0 40 80 120 160 200 0 Temperature ( oC) US5781 CMOS High Sensitivity Switch 5 10 15 20 25 30 Time in Wave Solder (Seconds) 3901005781 Rev 1.7 7/23/01 Page 4 US5781 CMOS High Sensitivity Switch Preliminary Datasheet Unique Features CMOS Hall IC Technology The chopper stabilized amplifier uses switched capacitor techniques to eliminate the amplifier offset voltage, which, in bipolar devices, is a major source of temperature sensitive drift. CMOS makes this advanced technique possible. The CMOS chip is also much smaller than a bipolar chip, allowing very sophisticated circuitry to be placed in less space. The small chip size also contributes to lower physical stress and less power consumption. Automotive and Severe Environment Protection Circuit R1 100Ω VDD RL 1.2K Z1 D1 C1 4.7nF Supply Voltage Installation Comments Hall IC Consider temperature coefficients of Hall IC and magnetics, as well as air gap life time variations. Observe temperature limits during wave soldering. VSS OUT C2 4.7nF Applications If reverse supply protection is desired, use a resistor in series with the VDD pin. The resistor will limit the supply current (Fault), IDD, to 50 mA. For severe EMC conditions, use the application circuit on this page. Two Wire Current Biasing Circuit RL I IN Iout ID D V DD Absolute Maximum Ratings Supply Voltage (Operating), VDD Supply Current (Fault), IDD Output Voltage, VOUT Output Current (Fault), IOUT Power Dissipation, PD 3.5V to 24V 50mA 3.5V to 24V 50mA 100mW Operating Temperature Range, T A -40 to 150°C Storage Temperature Range, T S -65 to 150°C Maximum Junction Temp, TJ 175°C ESD Sensitivity (All Pins) +/- 2KV US5781 CMOS High Sensitivity Switch Hall IC Rb The resistors R b and R L can be used to bias the input current, Iin. Refer to the part specification for limiting values. This circuit will help in getting the precise ON and OFF currents desired. BRP = Ioff = (VD D / Rb + IDD ) B OP = Ion = (Ioff + VD D / RL ) 3901005781 Rev 1.7 7/23/01 Page 5 US5781 CMOS High Sensitivity Switch Preliminary Datasheet Physical Characteristics UA Package Dimensions 45o Typical 1.60 1.40 2.13 1.87 4.30 3.90 0.84 0.63 UA Hall Plate / Chip Location 0.45 0.41 5o Typical 2.64 2.34 1.53 1.27 U57 * 115 3.20 2.80 0.48 0.43 45o Typical Marked Surface 1.75 1.55 All Dimensions in millimeters 0.38 Typical (see note 3) 0.20 0.00 0.41 0.35 1 2 NOTES: 1.) Controlling dimension: mm 2.) Leads must be free of flash and plating voids 3.) Do not bend leads within 1mm of lead to package interface. 4.) Package dimensions exclude molding flash 5.) Tolerance is 0.254mm unless otherwise specified 3 1.30 1.24 0.20 MIN 0.50 0.35 * 57104 = Supplier (Melexis) = Series (5780) Line 2: 1st digit (1) 2nd and 3rd digits(15) = Year (2001) = Week of Year PINOUT: Pin 1 Pin 2 Pin 3 V DD GND Output 0.41 0.35 2.57 2.51 SOT-23 Package Dimensions 3.00 2.60 15.5 14.5 * MARKING: Line 1: 1st digit (U) 2nd and 3rd digits (57) 1.80 1.50 chip 0.66 0.56 0.25 0.10 2.10 1.70 3.10 2.70 0.10 0.00 0.90 0.70 * MARKING: 1st & 2nd Digit (57) = Series (5780) 3rd Digit(1) = Year - 2001 Last Digits (04) = Week of Year SOT-23 Hall Plate / Chip Location 3 Bottom View of Package 0.95 0.85 NOTES: 1.) Controlling dimension: mm 2.) Lead thickness after solder plating will be 0.254 mm maximum 3.) Package dimensions exclude molding flash 4.) The end flash shall not exceed 0.127mm on each side of package 5.) Tolerance is 0.254mm unless otherwise specified 2 1 1.55 1.45 PINOUT: Pin 1 Pin 2 Pin 3 1.30 1.00 V DD Output GND For the latest version of this document, Go to our website at: WWW.melexis.com Or for additional information Contact Melexis Direct: Europe and Japan E-mail: [email protected] Phone: 011-32-13-670-780 US5781 CMOS High Sensitivity Switch USA and rest of the world E-mail: [email protected] Phone: (603)-223-2362 3901005781 Rev 1.7 7/23/01 Page 6