SS1352 Unipolar Hall Switch Features and Benefits – – – – – – – Application Examples – – – – – – – Wide operating voltage range from 3.5V to 24V Medium sensitivity CMOS technology Chopper-stabilized amplifier stage Superior temperature stability Extremely low switchpoint drift Insensitive to physical stress Low current consumption Open drain output Tiny SOT23 3L or flat SIP 3L both RoHS Compliant packages Automotive, Consumer and Industrial Solid-state switch Interrupter Speed detection Linear position detection Angular position detection Proximity detection 3 pin SOT23 (suffix SO) 3 pin SIP (suffix UA) Functional Block Diagram VDD Voltage Regulator OUT Chopper Hall Plate GND SIP Package Pin 1 – VDD Pin 2 – GND Pin 3 – OUT SOT Package Pin 1 – VDD Pin 2 – OUT Pin 3 – GND 1 V3.10 Nov 1, 2013 SS1352 Unipolar Hall Switch General Description 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 SS1352 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. The device is delivered in a Small Outline Transistor (SOT) for surface mount process or in a Plastic Single In Line (SIP flat) for through- hole mount. Both 3-lead packages are RoHS compliant. It incorporates advanced chopper stabilization techniques to provide accurate and stable magnetic switch points. There are many applications for this Glossary of Terms MilliTesla (mT), Gauss Units of magnetic flux density: 1mT = 10 Gauss RoHS Restriction of Hazardous Substances Operating Point (BOP) Magnetic flux density applied on the branded side of the package which turns the output driver ON (VOUT = VDSon) Release Point (BRP) Magnetic flux density applied on the branded side of the package which turns the output driver OFF (VOUT = high) 2 V3.10 Nov 1, 2013 SS1352 Unipolar 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 Unique Features Based on mixed signal CMOS technology, SS1352 is a Hall-effect device with high magnetic sensitivity. This multi-purpose latch meets most of the application requirements. The chopper-stabilized amplifier uses switched capacitor technique to suppress the offset generally observed with Hall sensors and amplifiers. The CMOS technology makes this advanced technique possible and contributes to smaller chip size and lower current consumption than bipolar technology. The small chip size is also an important factor to minimize the effect of physical stress. This combination results in more stable magnetic characteristics and enables faster and more precise design. The wide operating voltage from 2.5V to 24V, low current consumption and large choice of operating temperature range according to “L”, “K”and “E” specifications make this device suitable for automotive, industrial and consumer applications. Absolute Maximum Ratings Parameter Symbol Value Units Supply Voltage VDD 28 V Supply Current IDD 50 mA Output Voltage VOUT 28 V Output Current IOUT 50 mA Storage Temperature Range TS Maximum Junction Temperature TJ -50 to 150 165 3 °C °C V3.10 Nov 1, 2013 SS1352 Unipolar Hall Switch Symbol Value Units Temperature Suffix “E” TA -40 to 85 °C Temperature Suffix “K” TA -40 to 125 °C Temperature Suffix “L” TA -40 to 150 °C Operating Temperature Range Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolute-maximum- rated conditions for extended periods may affect device reliability. General Electrical Specifications DC Operating Parameters TA = 25°C, VDD=3.5V to 24V (unless otherwise specified) Parameter Symbol Test Conditions Typ Min Max Units 24 V 5 mA 0.5 V 10 µA Supply Voltage VDD Operating Supply Current IDD B < BRP Output Saturation Voltage VDSon IOUT = 20mA, B > BOP Output Leakage Current IOFF B < BRP VOUT = 24V 1 Output Rise Time tr RL = 1kΩ, CL = 20pF 0.25 µs Output Fall Time tf RL = 1kΩ, CL = 20pF 0.25 µs --- 10 KHz Single layer (1S) Jedec board 301 °C/W Maximum Switching Frequency FSW Package Thermal Resistance RTH 3.5 Note: The output of SS1352 will be switched after the supply voltage is over 2.2V, but the magnetic characteristics won't be normal until the supply is over 3.5V. Magnetic Specifications DC Operating Parameters VDD = 3.5 to 24V (unless otherwise specified) Package UA SO Parameter Symbol Operating Point BOP Release Point BRP Hysteresis BHYST Operating Point BOP Release Point BRP Hysteresis BHYST Test Conditions Ta=25°C,Vdd=12V DC Min Typ Max Units -160 -100 G -140 -50 G 40 Ta=25°C,Vdd=12V DC 100 160 G 50 140 G 40 4 G G V3.10 Nov 1, 2013 SS1352 Unipolar Hall Switch Output Behavior versus Magnetic Pole DC Operating Parameters TA = -40°C to 150°C, VDD = 3.5 to 24V (unless otherwise specified) Test Conditions (UA) Test Conditions (SO) OUT B > BRP B < BRP High B < BOP B > BOP Low The SOT-23 device is reversed from the UA package. The SOT-23 output transistor will be turned on(drops low) in the presence of a sufficiently strong South pole magnetic field applied to the marked face. 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 following figure, 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. Typical Three-Wire Application Circuit SS1352 When a weak power supply is used or when the device is intended to be used in noisy environment, it is 5 V3.10 Nov 1, 2013 SS1352 Unipolar Hall Switch recommended that following figure is used. Automotive and Severe Environment Protection Circuit SS1352 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 VDD. The diode D1 provides additional reverse voltage protection. Both solutions provide the required reverse voltage protection. ESD Precautions Electronic semiconductor products are sensitive to Electro Static Discharge (ESD). Always observe Electro Static Discharge control procedures whenever handling semiconductor products. 6 V3.10 Nov 1, 2013 SS1352 Unipolar Hall Switch Package Information Package SO, 3-Pin (SOT-23): Notes: 1). PINOUT: Pin 1 VDD Pin 2 Output Pin 3 GND 2). All dimensions are in millimeters; Top View 3 1.50 1 2.65 2 1.80 Side View 2.82 End View 0.10 1.05 0.70 0.30 0.00 0.30 Bottom View of SOT-23 Package 3 Chip 0.56 0.66 0.85 2 1 1.50 7 V3.10 Nov 1, 2013 SS1352 Unipolar Hall Switch 2.13 1.87 0.75 ± 0.05 1.52 ± 0.1 Package UA, 3-Pin SIP(TO-92): 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 SS1352EUA YES -40°C to 85°C SOT-23 Bulk, 1000 pieces/bag SS1352ESOT YES -40°C to 85°C SOT-23 7-in. reel, 3000 pieces/reel SS1352KUA YES -40°C to 125°C SOT-23 Bulk, 1000 pieces/bag SS1352KSOT YES -40°C to 125°C SOT-23 7-in. reel, 3000 pieces/reel SS1352LUA YES -40°C to 150°C SOT-23 Bulk, 1000 pieces/bag SS1352LSOT YES -40°C to 150°C SOT-23 7-in. reel, 3000 pieces/reel 8 V3.10 Nov 1, 2013