US5881 CMOS Multi-Purpose Switch Features and Benefits • • • • Chopper stabilized amplifier stage New miniature package / thin, high reliability package Operation down to 3.5V CMOS for optimum stability, quality and cost Applications • • • • • Solid state switch Limit switch Current limit Interrupter Current sensing Ordering Information Part No. US5881 US5881 Temperature Suffix Package Temperature Range E SO or UA -40oC to 85oC Extended L SO or UA -40oC to 150oC Automotive *Contact factory or sales representative for legacy temperature options Functional Diagram V DD Description The US5881 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 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. US5881 CMOS Multi-Purpose Switch 3901005881 Rev 5.0 24/July/01 Page 1 US5881 CMOS Multi-Purpose Switch US5881 Electrical Specifications Parameter Supply Voltage Symbol Test Conditions VDD Operating Min 3.5 Typ Max 24 Units V Supply Current IDD B<BRP 1.5 2.5 4.0 mA Saturation Voltage VDS(on) IOUT = 20 mA, B>BOP 0.4 0.5 V Output Leakage IOFF B<BRP, VOUT = 20V 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 US5881 Magnetic Specifications Parameter Symbol Test Conditions Min Typ Max Units Operating Point3 BOP 15 25 30 mT Release Point BRP 9.5 20 - mT Hysteresis Bhys 2.0 4.3 5.5 mT Notes: 1. 1 mT = 10 Gauss. 2. 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 markedface. 3. At –40ºC, maximum BOP = 35 mT. Absolute Maximum Ratings Supply Voltage (Operating), VDD Supply Current (Fault), IDD Output Voltage, VOUT Output Current (Fault), IOUT Power Dissipation, PD 24V 50mA 24V 50mA 100mW Operating Temperature Range, T A -40°C to 150°C Storage Temperature Range, T S -65°C to 150°C Maximum Junction Temp, TJ 175°C ESD Sensitivity (All Pins) +/- 4KV 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. US5881 CMOS Multi-Purpose Switch 3901005881 Rev 5.0 24/July/01 Page 2 US5881 CMOS Multi-Purpose Switch Performance Graphs TypicalMagnetic MagneticSwitch SwitchPoints Points Typical versus versus Supply Voltage Supply Voltage Typical Magnetic Switch Points versus Temperature 5881 35 5881 35 BOP 30 Flux Density (mT) Flux Density (mT) 30 B OP 25 B RP 25 BRP 20 15 20 10 15 BHYS 5 0 10 0 5 10 20 15 -40 25 0 Supply Voltage (V) 80 120 150 Temperature (ºC) Output Voltage Minimum & Maximum Magnetic Switch Range versus Temperature versus Output Voltage versus Flux Density Flux Density 5881 35 40 5881 30 BOP Max 24 V DD 25 Output Voltage (V) Flux Density (mT) 30 20 15 B OP 18 12 6 B RP 10 V out BRP Min 0 5 -40 0 40 80 120 160 -20 0 10 20 30 40 Flux Density (mT) Temperature (ºC) US5881 CMOS Multi-Purpose Switch -10 3901005881 Rev 5.0 24/July/01 Page 3 US5881 CMOS Multi-Purpose Switch Performance Graphs Typical Saturation Voltage versus Temperature VDD = 12 V, I OUT = 20mA Typical Supply Current versus Supply Voltage 5881 5 5881 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) US5881 CMOS Multi-Purpose Switch 5 10 15 20 25 30 Time in Wave Solder (Seconds) 3901005881 Rev 5.0 24/July/01 Page 4 US5881 CMOS Multi-Purpose Switch Application Comments 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. 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 below. 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. Installation Consider temperature coefficients of Hall IC and magnetics, as well as air gap life time variations. Observe temperature limits during wave soldering. Applications Examples Two Wire Optional Current Biasing Circuit Automotive and Severe Environment Protection Circuit R1 100Ω V D1 Z1 C1 Supply Voltage 4.7 nF DD RL IIN RL 1.2K Iout IDD VDD Hall IC OUT C2 4.7nF Hall IC Rb Vss 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. B RP = Ioff = (V DD / Rb + I DD ) B OP = Ion = (Ioff + VDD / R L ) US5881 CMOS Multi-Purpose Switch 3901005881 Rev 5.0 24/July/01 Page 5 US5881 CMOS Multi-Purpose Switch 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 U58 * 945 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 +/- 0.254 mm unless otherwise specified. 3 = Supplier (Melexis) = Series (5880) Line 2: 1st digit (9) 2nd and 3rd digits(45) = Year (1999) = Week of Year PINOUT: Pin 1 Pin 2 Pin 3 1.30 1.24 0.50 0.35 0.20 MIN 3 * 1651 1 V DD GND Output 0.41 0.35 2.57 2.51 SOT-23 Package Dimensions (Top View) 3.00 2.60 15.5 14.5 * MARKING: Line 1: 1st digit (U) 2nd and 3rd digits (58) 1.80 1.50 chip 0.66 0.56 2 2.10 1.70 0.25 0.10 Pin # 3.10 2.70 0.10 0.00 0.90 0.70 NOTES: 1. MARKING: 1st Digit (1) = Series (1880) 2nd Digit(6) = Year - 1996 Last Digits (51) = Week of Year 2. PINOUT (See Top View at left): Pin 1 VDD Pin 2 Output Pin 3 GND 3. Controlling dimension: mm. 4. Lead thickness after solder plating will be 0.254 mm maximum. 5. Package dimensions exclude molding flash. 6. The end flash shall not exceed 0.127 mm on each side of package. 7. Tolerance is +/- 0.254 mm unless otherwise specified. SOT-23 Hall Plate / Chip Location (Bottom View) 0.95 0.85 1.55 1.45 1.30 1.00 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 US5881 CMOS Multi-Purpose Switch USA and rest of the world E-mail: [email protected] Phone: (603)-223-2362 3901005881 Rev 5.0 24/July/01 Page 6