SS109 Unipolar Hall Switch Packages Features and Benefits – – – – – – – – – 3 pin SOT23 (suffix SO) 3 pin SIP (suffix UA) Wide operating voltage range from 2.5V to 24V Medium sensitivity CMOS technology Chopper-stabilized amplifier stage Superior temperature stability Insensitive to physical stress Open drain output Low current consumption Small Size-SOT23 3L or SIP 3L both RoHS Compliant packages Functional Block Diagram Application Examples – – – – – – – VDD Voltage Regulator OUT Chopper Automotive, Consumer and Industrial Solid-state switch Interrupter Speed detection Angular position detection Linear position detection Proximity detection Hall Plate General Description GND SIP Package Pin 1 – V DD Pin 2 – GND Pin 3 – OUT SOT Package Pin 1 – V DD Pin 2 – OUT Pin 3 – GND The SS109 is a unipolar Hall effect sensor IC fabricated from mixed signal CMOS technology. The device integrates a voltage regulator, Hall sensor with dynamic offset cancellation system, Schmitt trigger and an open-drain output driver, all in a single package. It incorporates advanced chopper stabilization techniques to provide accurate and stable magnetic switch points. There are many applications for this HED – Hall Electronic Device - in addition to those listed above. Thanks to its wide operating voltage range and extended choice of temperature range, it is quite suitable for use in automotive, industrial and consumer applications. The device is delivered in a Small Outline Transistor (SOT) or in a Plastic Single In Line ( SIP 3L flat). Both 3-lead packages are RoHS compliant. 1 V2.10 May 1, 2012 SS109 Unipolar Hall Switch Glossary of Terms MilliTesla (mT), Gauss RoHS SOT ESD BLDC Operating Point (B OP ) Release Point (B RP ) Units of magnetic flux density: 1mT = 10 Gauss Restriction of Hazardous Substances Small Outline Transistor (SOT package) - also referred with the package code “SO” Electro-Static Discharge Brush-Less Direct-Current Magnetic flux density applied on the branded side of the package which turns the output driver ON (V OUT = V DSon ) Magnetic flux density applied on the branded side of the package which turns the output driver OFF (V OUT = high) Pin Definitions and Descriptions SOT Pin № SIP Pin № Name Type Function 1 2 3 VDD OUT GND Supply Output Ground Supply Voltage pin Open Drain Output pin Ground pin 1 3 2 Table 1: Pin definitions and descriptions Absolute Maximum Ratings Parameter Supply Voltage Supply Current Output Voltage Output Current Storage Temperature Range Maximum Junction Temperature Symbol V DD I DD V OUT I OUT TS TJ Value 28 50 28 50 -50 to 150 165 Units V mA V mA °C °C Symbol TA TA TA Value -40 to 85 -40 to 125 -40 to 150 Units °C °C °C Table 2: Absolute maximum ratings Operating Temperature Range Temperature Suffix “E” Temperature Suffix “K” Temperature Suffix “L” Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. 2 V2.10 May 1, 2012 SS109 Unipolar Hall Switch General Electrical Specifications DC Operating Parameters T A = 25℃, V DD = 2.5V to 24V (unless otherwise specified) Parameter Symbol Supply Voltage Supply Current Output Saturation Voltage Output Leakage Current Output Rise Time Output Fall Time Maximum Switching Frequency Package Thermal Resistance V DD I DD V DSon I OFF tr tf F SW R TH Test Conditions Min Operating B < B RP I OUT = 20mA, B > B OP B < B RP V OUT = 24V R L = 1kΩ, C L = 20pF R L = 1kΩ, C L = 20pF --Single layer (1S) Jedec board 2.2 Typ 1 0.25 0.25 10 301 Max Units 24 5 0.5 10 V mA V µA µs µs KHz °C/W Table 3: Electrical Specifications Note: The output of SS109 will be switched after the supply voltage is over 2.2V, but the magnetic characteristics won't be normal until the supply is over 2.5V. Magnetic Specifications DC Operating Parameters V DD = 2.5V to 24V (unless otherwise specified) SS109 Parameter Operating Point Release Point Hysteresis Operating Point Release Point Hysteresis Operating Point Release Point Hysteresis Symbol B OP B RP B HYST B OP B RP B HYST B OP B RP B HYST Test Conditions E spec., T A = 85°C K spec., T A = 125°C L spec., T A = 150°C Min Typ Max Units -150 -120 30 -160 -130 30 -170 -140 30 -120 -80 40 -120 -80 40 -120 -80 40 -90 -40 50 -85 -35 50 -80 -30 50 G G G G G G G G G Table 4: Magnetic Specifications Output Behavior versus Magnetic Pole DC Operating Parameters T A = -40℃ to 150℃, V DD = 2.5V to 24V (unless otherwise specified) Parameter Test Conditions OUT South pole (SOT ) B > B OP North pole ( TO) B > B OP Null or weak magnetic field B = 0 or B < B RP Table5:Output behavior versus magnetic pole Low Low High 3 V2.10 May 1, 2012 SS109 Unipolar Hall Switch Application Information 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 generated by the chopper stabilization technique. As is shown in the two figures in next page, 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 (V CC / R1 ≤ 50mA) - the resulting device supply voltage V DD has to be higher than V DD min (V DD = V CC – R1*I DD ) - the resistor has to withstand the power dissipated in reverse voltage condition (P D = V CC 2/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. Both solutions provide the required reverse voltage protection. When a weak power supply is used or when the device is intended to be used in noisy environment, it is recommended that the figure 13.3 from the Application Information section is used. The low-pass filter formed by R1 and C1 and the Zener diode Z1 bypass the disturbances or voltage spikes occurring on the device supply voltage V DD . The diode D1 provides additional reverse voltage protection. Automotive and Severe Environment Protection Circuit Typical Three-Wire Application Circuit R1:100 C1 VDD SS109 C1 R2 VDD D1 OUT Z1 SS109 R2 OUT C2 C2 GND GND ESD Precautions Electronic semiconductor products are sensitive to Electro Static Discharge (ESD). Always observe Electro Static Discharge control procedures whenever handling semiconductor products. 4 V2.10 May 1, 2012 SS109 Unipolar Hall Switch Package Information Package A, 3-Pin SIP: 5 V2.10 May 1, 2012 SS109 Unipolar Hall Switch Package AT, 3-Pin SOT-23: Ordering Information Part No. Pb-free Temperature Code Package Code Packing SS109ESOT YES -40°C to 85°C SOT-23 7-in. reel, 3000 pieces/reel SS109EUA YES -40°C to 85°C TO-92 Bulk, 1000 pieces/bag SS109KSOT YES -40°C to 125°C SOT-23 7-in. reel, 3000 pieces/reel SS109KUA YES -40°C to 125°C TO-92 Bulk, 1000 pieces/bag SS109LSOT YES -40°C to 150°C SOT-23 7-in. reel, 3000 pieces/reel SS109LUA YES -40°C to 150°C TO-92 Bulk, 1000 pieces/bag 6 V2.10 May 1, 2012