SS275

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Document overview

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Technical content

Features

− Solid-State Reliability much better than reed switch − Omnipolar, output switches with absolute value of North or South pole from magnet − Wide operating voltage range from 3.5V to 24V − High sensitivity for direct reed switch replac e- ment applications

Applications

− Solid state switch − Speed detection − Interrupter − Magnet proximity sensor for reed switch r e- placement 3 pin SOT23 (suffix SO) 3 pin SIP (suffix UA) General Description The SS275 Omnipolar Hall eff ect sensor IC is fabr i- cated from mixed signal CMOS technology .It inco r- porates advanced chopper -stabilization techniques to provide accurate and stable magnetic switch points. The output transistor of the SS275 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 (B RP) in the absence of a magnetic field. The chopper stabilized amplifier uses switched capac- itor techniques to eliminate the amplifie r offset vol t- age, which, in bipolar devices, is a major source of temperature sensitive drift. CMOS makes this a d- vanced technique possible. The CMOS chip is also much smaller than a bipolar chip, allowing very s o- phisticated circuitry to be placed in less s pace. The small chip size also contributes to lower physical stress and less power consumption. Functional Block Diagram

CMOS Omnipolar High Sensitivity Micropower Hall Switch 2 V3.10 Nov 1, 2013 Glossary of Terms − MilliTesla (mT), Gauss Units of magnetic flux density: 1mT = 10 Gauss − RoHS Restriction of Hazardous Substances − ESD Electro -Static Discharge − Operating Point (BOP) Magnetic flux density applied on the branded side of the package which turns the output driver ON (V OUT = VDSon) − Release Point (BRP) Magnetic flux density applied on the branded side of the package which turns the output driver OFF (VOUT = high) Pin Definitions and Descriptions 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 Absolute Maximum Ratings Parameter Symbol Val ue Units Supply Voltage(operating) VDD 28 V Supply Current IDD 5 mA Output V oltage VOUT 28 V Output Curent IOUT 10 mA Operating Temperature Range TA -40 to 150 °C Storage Temperature Rang TS -50 to 165 °C ESD Sensitivity - 4000 V Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolute -maximum rated conditions for e x- tended periods may affect device reliability.

CMOS Omnipolar High Sensitivity Micropower Hall Switch 3 V3.10 Nov 1, 2013 DC Operating Parameters: TA = 25°C, VDD= 5 V. Parameter Symbol Test Conditions Min Typ Max Units Operating voltage VDD Operating 3.5 24 V Supply current IDD B < BRP 5 mA Output Saturation V olt- age VDSon IOUT = 20mA, B > BOP 0.5 V Output Leakage Current IOFF B < BRP VOUT = 24V 1 10 µA Output Rise Time tr RL = 1kΩ, CL = 20pF 0.25 µs Output Fall Time tf RL = 1kΩ, CL = 20pF 0.25 µs Maximum Switching Frequency FSW --- 10 KHz Package Thermal Re- sistance RTH Single layer (1S) Jedec board 301 °C/W Operating Parameters: TA = 25°C, VDD=5VDC. PARAMETER Symbol Min Type Max Units Operating Point Bop - +/-35 +/-60 Gs Release Point Brp +/-10 +/-20 - Gs Hysteresis Bhys - 15 - Gs ESD Protection Human Body Model (HBM) tests according to: Mil. Std. 883F method 3015.7 Parameter Symbol Limit Values Unit Notes Min Max ESD V oltage VESD ±2 ±4 kV ESD Precautions Electronic semiconductor products are sensitive to Electro Static Discharge (ESD). Always observe Electro Static Discharge control procedures whenever handling semiconductor products.

CMOS Omnipolar High Sensitivity Micropower Hall Switch 4 V3.10 Nov 1, 2013 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 Application Informatio It is strongly recommended that an external bypass capacitor be connected (in close proximity to the Hall sensor) between the supply (VDD Pin) and ground (GND Pin) of the device to reduce both external noise and noise gener- ated by the chopper stabilization technique. As is shown in the following two figures, a 0.1μF capacitor is typical. For reverse voltage protection, it is recommended to connect a resistor or a diode in series with the VDD pin. When using a resistor, three points are important: - the resistor has to limit the reverse current to 50mA maximum (VCC / R1 ≤ 50mA) - the resulting device supply voltage VDD has to be higher than VDD min (VDD = VCC – R1*IDD) - the resistor has to withstand the power dissipated in reverse voltage condition (PD = VCC2/R1) When using a diode, a reverse current cannot flow and the voltage drop is almost constant (≈0.7V). Therefore, a 100Ω/0.25W resistor for 5V application and a diode for higher supply voltage are recommended. When a weak power supply is used or when the device is intended to be used in noisy environment, it is reco m- mended that the second figure is used. The low-pass filter formed by R1 and C1 and the Zener diode Z1 bypass the disturbances or voltage spikes occur- ring on the device supply voltage V DD. The diode D1 provides additional reverse voltage protection. Both solu- tions provide the required reverse voltage protection. SS275 10k 4.7n VDD GND OUT 100n SS275 R1:100 10k 4.7n VDD GND OUT 100 Automotive and Severe Environment Protection Circuit Typical Three-Wire Application Circuit

CMOS Omnipolar High Sensitivity Micropower Hall Switch 5 V3.10 Nov 1, 2013

Package Information

Package SOT, 3-Pin SOT-23: 0.56 0.66 0.95 0.80 1.50 1.40 Chip Bottom View of SOT-23 Package 2.70 3.10 1.00 1.30 0.70 0.90 0.00 0.10 0.35 0.50 0.10 0.25 0.20 MIN 2.60 3.00 1.50 1.80 1.70 2.10 2 1 Top View Side View End View Notes: 1). PIN OUT: Pin 1 V DD Pin 2 Output Pin 3 GND 2). All dimensions are in millimeters ;

CMOS Omnipolar High Sensitivity Micropower Hall Switch 6 V3.10 Nov 1, 2013 Package UA, 3-Pin SIP:

Ordering Information

Part No. Pb-free Temperature Code Package Code Packing SS275ESOT YES -40°C to 85°C SOT-23 7-in. reel, 3000 pieces/ reel SS275EUA YES -40°C to 85°C TO-92 Bulk, 1000 pieces/ bag SS275KSOT YES -40°C to 125°C SOT-23 7-in. reel, 3000 pieces/ reel SS275KUA YES -40°C to 125°C TO-92 Bulk, 1000 pieces/ bag SS275LSOT YES -40°C to 150°C SOT-23 7-in. reel, 3000 pieces/ reel SS275LUA YES -40°C to 150°C TO-92 Bulk, 1000 pieces/ bag 4.0 ± 0.01 1.27 2.13 1.87 1.00 1.20 45° ± 1° 1.52 ± 0.1 3° ± 1° 0.75 ± 0.05 3.0 ± 0.01 0.44± 0.01 0.05 ± 0.05 1.6.± 0.1 0.84(Nom) 3° ± 1° 6° ± 1° 6° ± 1° 3° ± 1° 14 .5 ± 1 Active Area Depth: Sensor Location 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 V DD Pin 2 GND Pin 3 Output 0.39± 0.01 0.38 ± 0.01 2.54