SS3212 CMOS Omnipolar High Sensitivity Micropower Hall Switch Features − − − − Micropower consumption for battery powered applications Omnipolar, output switches with absolute value of North or South pole from magnet Operation down to 2.5V High sensitivity for direct reed switch replacement applications 3 pin SOT23 (suffix SO) 3 pin SIP (suffix UA) General Description The SS3212 Omnipolar Hall effect sensor IC is fabricated from mixed signal CMOS technology .It incorporates advanced chopper-stabilization techniques to provide accurate and stable magnetic switch points. The circuit design provides an internally controlled clocking mechanism to cycle power to the Hall element and analog signal processing circuits. This serves to place the high current-consuming portions of the circuit into a “Sleep” mode. Periodically the device is “Awakened” by this internal logic and the magnetic flux from the Hall element is evaluated against the predefined thresholds. If the flux density is above or below the Bop/Brp thresholds then the output transistor is driven to change states accordingly. While in the “Sleep” cycle the output transistor is latched in its previous state. The design has been optimized for service in applications requiring extended operating lifetime in battery powered systems. The output transistor of the SS3212 will be latched on (Bop) in the presence of a sufficiently strong South or North magnetic field facing the marked side of the package. The output will be latched off (Brp) in the absence of a magnetic field. Applications − − − − Solid state switch Handheld Wireless Handset Awake Switch Lid close sensor for battery powered devices Magnet proximity sensor for reed switch replacement in low duty cycle applications 1 V3.10 Nov 1, 2013 SS3212 CMOS Omnipolar High Sensitivity Micropower Hall Switch Typical Application Circuit capacitor be connected (in close proximity to the Hall sensor) between the supply and ground of the device to reduce both external noise and noise generated by the chopper-stabilization technique. This is especially true due to the relatively high impedance of battery supplies. SEC's pole-independent sensing technique allows for operation with either a north pole or south pole magnet orientation, enhancing the manufacturability of the device. The state-of-the-art technology provides the same output polarity for either pole face. It is strongly recommended that an external bypass Functional Block Diagram VDD Sleep/Awake Logic OUT Chopper Hall Plate GND 2 V3.10 Nov 1, 2013 SS3212 CMOS Omnipolar High Sensitivity Micropower Hall Switch Pins Definition and Description SOT Pin № SIP Pin № Name Type Function 1 1 VDD Supply Supply Voltage pin 2 3 OUT Output Open Drain Output pin 3 2 GND Ground Ground pin Internal Timing Circuit Current Period Iaw Sample & Output Latched Iav Isp Awake Taw:175μs Sleep Tsl:70ms 0 Time 3 V3.10 Nov 1, 2013 SS3212 CMOS Omnipolar High Sensitivity Micropower Hall Switch Absolute Maximum Ratings Parameter Symbol Value Units Supply Voltage(operating) VDD 6 V Supply Current IDD 5 mA Output Voltage VOUT 6 V Output Curent IOUT 5 mA Operating Temperature Range TA -40 to 85 °C Storage Temperature Rang TS -50 to 150 °C - 4000 V ESD Sensitivity Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolute-maximum rated conditions for extended periods may affect device reliability. DC Electrical Characteristics DC Operating Parameters: TA = 25°C, VDD=2.75V. Parameter Symbol Test Conditions Min Typ Max Units Operating voltage VDD Operating 2.5 3 5.5 V Supply current IDD Average Output Current IOUT Saturation Voltage VSAT IOUT=1mA Awake mode time TAW Operating Sleep mode time TSL Operating μA 5 1.0 mA 0.4 V μS 175 70 mS Magnetic Characteristics Output Voltage(V) 3.0 OFF 2.5 2.0 BOPN 1.5 BRPS BOPS BRPN 1.0 ON 0.5 0 -80 -60 -40 -20 0 20 40 60 80 Magnetic Flux(Gauss) Operating Parameters: TA = 25°C, VDD=2.75VDC. PARAMETER Symbol Min Type Max Units Operating Point Bop - +/-35 +/-60 Gs Release Point Brp +/-5 +/-21 - Gs 4 V3.10 Nov 1, 2013 SS3212 CMOS Omnipolar High Sensitivity Micropower Hall Switch Hysteresis Bhys - 14 - Gs ESD Protection Human Body Model (HBM) tests according to: Mil. Std. 883F method 3015.7 Parameter Symbol ESD Voltage Limit Values Min Max ±4 VESD Unit Notes kV 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. Installation Comments Consider temperature coefficients of Hall IC and magnetics , as well as air gap and life time variations. Observe temperature limits during wave soldering. Typical IR solder-reflow profile: − No Rapid Heating and Cooling. − Recommended Preheating for max. 2minutes at 150°C − Recommended Reflowing for max. 5seconds at 240°C ESD Precautions Electronic semiconductor products are sensitive to Electro Static Discharge (ESD). Always observe Electro Static Discharge control procedures whenever handling semiconductor products. 5 V3.10 Nov 1, 2013 SS3212 CMOS Omnipolar High Sensitivity Micropower Hall Switch Performance Characteristics 6 V3.10 Nov 1, 2013 SS3212 CMOS Omnipolar High Sensitivity Micropower Hall Switch Package Information Package SOT, 3-Pin SOT-23: Notes 1). PINOUT: Top View 3 2.60 1.50 3.00 1.80 1 Pin 1 VDD Pin 2 Output Pin 3 GND 2). All dimensions are in millimeters; 2 1.70 2.10 Side View End View 2.70 3.10 0.10 0.25 1.00 1.30 0.70 0.90 0.20 Min 0.00 0.10 0.35 0.50 SOT-23 Package Hall Location Bottom View of SOT-23 Package 3 Chip 0.56 0.66 0.95 0.80 2 1 1.50 1.40 7 V3.10 Nov 1, 2013 SS3212 CMOS Omnipolar High Sensitivity Micropower Hall Switch 2.13 1.87 0.75 ± 0.05 1.52 ± 0.1 Package UA, 3-Pin SIP: 3° ± 1° 1.00 1.20 45° ± 1° 4.0 ± 0.01 1 2 3 3.0 ± 0.01 Sensor Location Active Area Depth: 0.84(Nom) 3° ± 1° 6° ± 1° 3° ± 1° 6° ± 1° 1 2 3 0.05 ± 0.05 1.6.± 0.1 0.44± 0.01 0.38 ± 0.01 14 .5 ± 1 0.39± 0.01 Notes: 1). Controlling dimension : mm ; 2). Leads must be free of flash and plating voids ; 3). Do not bend leads within 1 mm of lead to package interface ; 4). PINOUT: Pin 1 VDD Pin 2 GND Pin 3 Output 1.27 2.54 Ordering Information Part No. Pb-free Temperature Code Package Code Packing SS3212ESOT YES -40°C to 85°C SOT-23 7-in. reel, 3000 pieces/reel SS3212EUA YES -40°C to 85°C TO-92 Bulk, 1000 pieces/bag SS3212KSOT YES -40°C to 125°C SOT-23 7-in. reel, 3000 pieces/reel SS3212KUA YES -40°C to 125°C TO-92 Bulk, 1000 pieces/bag SS3212LSOT YES -40°C to 150°C SOT-23 7-in. reel, 3000 pieces/reel SS3212LUA YES -40°C to 150°C TO-92 Bulk, 1000 pieces/bag 8 V3.10 Nov 1, 2013